Products and specifications discussed herein are subject to change by Micron without notice.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Features
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 1©2007 Micron Technology, Inc. All rights reserved.
DDR2 SDRAM SORDIMM
MT18HTS25672RH – 2GB
MT18HTS51272RH – 4GB
For component data sheets, refer to Micron’s Web site: www.micron.com
Features
200-pin, small-outline registered, dual in-line
memory module (SORDIMM)
Fast data transfer rates: PC2-6400, PC2-5300, PC2-
4200, or PC2-3200
2GB (256 Meg x 72), 4GB (512 Meg x 72)
S upports ECC error detection and correction
•V
DD = +1.8V
•V
DDSPD = +1.7V to +3.6V
JEDEC-standar d 1.8V I/O (SSTL_18-compatible)
Differential data strobe (DQS, DQS#) option
•4n-bit prefetch architecture
Dual rank, using TwinDie™ devices
Multipl e internal device banks for concurrent
operation
Programmable CAS# latency (CL)
Posted CAS additive latency (AL)
WRITE latency = READ latency - 1 tCK
Programmable burst lengths (BL): 4 or 8
Adjustable data-output drive strength
64ms, 8192-cycle refresh
On-die termination (ODT)
Serial presence-detect (SPD) with EEPROM
PLL to reduce system clock line loading
Gold edge contacts
•I
2C temperature sensor
Figure 1: 200-Pin SORDIMM (MO-274 R/C B)
Notes: 1. Contact Micron for industrial temperature
module offerings.
2. CL = CAS (READ) latency; registered mode
will add one clock cycle to CL.
Options Marking
Operating temperature1
Commercial (0°C TA +70°C) None
Industrial (–40°C TA +85°C) I
•Package
200-pin DIMM (lead-free) Y
Frequency/CAS latency2
2.5ns @ CL = 5 (DDR2-800) -80E
3.0ns @ CL = 5 (DDR2-667) -667
3.75ns @ CL = 4 (DDR2-533) -53E
5.0ns @ CL = 3 (DDR2-400) -40E
PCB height: 30mm (1.18in)
Table 1: Key Timing Parameters
Speed
Grade Industry Nomenclature
Data Rate (MT/s) tRCD
(ns) tRP
(ns) tRC
(ns)CL = 5 CL = 4 CL = 3
-80E PC2-6400 800 533 12.5 12.5 55
-667 PC2-5300 667 533 400 15 15 55
-53E PC2-4200 533 400 15 15 55
-40E PC2-3200 400 15 15 55
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 2©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Features
Notes: 1. Data sheets for the base devices can be found on Micron ’s Web si te.
2. All part numbers end with a two-place code (not shown), designating compo nent and PCB
revisions. Consult factory for current revision codes. Example: MT18HTS51272RHY-667A1.
Table 2: Addressing
Parameter 2GB 4GB
Refresh count 8K 8K
Row address 16K A[13:0] 32K A[14:0]
Device bank address 8 BA[2:0] 8 BA[2:0]
Device configuration 2Gb TwinDie (256 Meg x 8) 4Gb TwinDie (512 Meg x 8)
Column address 1K A[9:0] 1K A[9:0]
Module rank address 2 S#[1:0] 2 S#[1:0]
Table 3: Part Numbers and Timing Parameters – 2GB Modules
Base device: MT47H256 M8THN,1 2Gb TwinDie DDR2 SDRAM
Part Number2Module
Density Configuration Module
Bandwidth Memory
Clock/Data Rate Clock Cycles
(CL-tRCD-tRP)
MT18HTS25672RH(I)Y-80E__ 2GB 256 Meg x 72 6.4 GB/s 2.5ns/800 MT/s 5-5-5
MT18HTS25672RH(I)Y-667__ 2GB 256 Meg x 72 5.3 GB/s 3.0ns/667 MT/s 5-5-5
MT18HTS25672RH(I)Y-53E__ 2GB 256 Meg x 72 4.3 GB/s 3.75ns/533 MT/s 4-4-4
MT18HTS25672RH(I)Y-40E__ 2GB 256 Meg x 72 3.2 GB/s 5.0ns/400 MT/s 3-3-3
Table 4: Part Numbers and Timing Parameters – 4GB Modules
Base device: MT47H512 M8THM,1 4Gb TwinDie DDR2 SDRAM
Part Number2Module
Density Configuration Module
Bandwidth Memory
Clock/Data Rate Clock Cycles
(CL-tRCD-tRP)
MT18HTS51272RH(I)Y-667__ 4GB 512 Meg x 72 5.3 GB/s 3.0ns/667 MT/s 5-5-5
MT18HTS51272RH(I)Y-53E__ 4GB 512 Meg x 72 4.3 GB/s 3 .7 5ns/533 MT/s 4-4-4
MT18HTS51272RH(I)Y-40E__ 4GB 512 Meg x 72 3.2 GB/s 5.0ns/400 MT/s 3-3-3
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 3©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Pin Assignments and Descriptions
Pin Assignments and Descriptions
Table 5: Pin Assignments
200-Pin SORDIMM Front 200-Pin SORDIMM Back
Pin Symbol Pin Symbol Pin Symbol Pin Symbol Pin Symbol Pin Symbol Pin Symbol Pin Symbol
1V
REF 51 DQ18 101 VDD 151 VSS 2V
SS 52 VSS 102 A6 152 VSS
3 DQ0 53 DQ19 103 A5 153 DQS5# 4 DQ4 54 DQ28 104 A4 154 DM5
5V
SS 55 VSS 105 A3 155 DQS5 6 DQ5 56 DQ29 106 VDD 156 VSS
7 DQ1 57 DQ24 107 A2 157 VSS 8V
SS 58 VSS 108 A1 158 DQ46
9 DQS0# 59 DQ25 109 VDD 159 DQ42 10 DM0 60 DM3 110 A0 160 DQ47
11 DQS0 61 VSS 111 A10 161 DQ43 12 VSS 62 VSS 112 BA1 162 VSS
13 VSS 63 DQS3# 113 BA0 163 VSS 14 DQ6 64 DQ30 114 VDD 164 DQ52
15 DQ2 65 DQS3 115 RAS# 165 DQ48 16 DQ7 66 DQ31 116 WE# 166 DQ53
17 DQ3 67 VSS 117 VDD 167 DQ49 18 VSS 68 VSS 118 S0# 168 VSS
19 VSS 69 DQ26 119 CAS# 169 VSS 20 DQ12 70 CB4 120 ODT0 170 DM6
21 DQ8 71 DQ27 121 S1# 171 DQS6# 22 DQ13 72 CB5 122 A13 172 VSS
23 DQ9 73 VSS 123 VDD 173 DQS6 24 VSS 74 VSS 124 VDD 174 DQ54
25 VSS 75 CB0 125 ODT1 175 VSS 26 DM1 76 DM8 126 CK0 176 DQ55
27 DQS1# 77 CB1 127 NC 177 DQ50 28 VSS 78 VSS 128 CK0# 178 VSS
29 DQS1 79 VSS 129 DQ32 179 DQ51 30 DQ14 80 CB6 130 VSS 180 DQ60
31 VSS 81 DQS8# 131 VSS 181 VSS 32 DQ15 82 CB7 132 DQ36 182 DQ61
33 DQ10 83 DQS8 133 DQ33 183 DQ56 34 VSS 84 VSS 134 DQ37 184 VSS
35 DQ11 85 VSS 135 DQS4# 185 DQ57 36 DQ20 86 CB2 136 VSS 186 DM7
37 VSS 87 CKE0 137 DQS4 187 VSS 38 DQ21 88 CB3 138 DM4 188 DQ62
39 DQ16 89 CKE1 139 VSS 189 DQS7# 40 VSS 90 VSS 140 VSS 190 VSS
41 DQ17 91 EVENT# 141 DQ34 191 DQS7 42 RESET# 92 BA2 142 DQ38 192 DQ63
43 VSS 93 VDD 143 DQ35 193 DQ58 44 DM2 94 A14 144 DQ39 194 SDA
45 DQS2# 95 A12 145 VSS 195 VSS 46 VSS 96 A11 146 VSS 196 SCL
47 DQS2 97 A9 147 DQ40 197 DQ59 48 DQ22 98 VDD 148 DQ44 198 SA1
49 VSS 99 A7 149 DQ41 199 VDDSPD 50 DQ23 100 A8 150 DQ45 200 SA0
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 4©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Pin Assignments and Descriptions
Table 6: Pin Descriptions
Symbol Type Description
A[14:0] Input Address inputs: Provide the row address for ACTIVE commands, and the column address
and auto precharge bit (A10) for READ/WRITE commands, to select one location out of the
memory array in the respective bank. A10 sampled during a PRE CHARGE command
determines whether the PRECHARGE applies to one devi ce bank (A10 LOW, device bank
selected by BA[2:0]) or all device banks (A10 HIGH). The address inputs also provide the op-
code during a LOAD MODE command. A[13:0] address the 2GB module; A[14:0] address the
4GB module.
BA[2:0] Input Bank address inputs: BA[2:0] define the device bank to which an ACTIVE, READ, WRITE, or
PRECHARGE command is being applied. BA[2:0] define which mode register (MR, EMR1,
EMR2, and EMR3) is loaded during the LOAD MODE command.
CK0, CK0# Input Clock: CK and CK# are differential clock inputs. All control, command, and address input
signals are sampled on the crossing of the positive edge of CK and the negative edge of CK#.
CKE[1:0] Input Clock enable: CKE enables (registered HIGH) and disables (registered LOW) internal
circuitry and clocks on the DDR2 SDRAM.
DM[8:0] Input Input data mask: DM i s an input ma sk signal f or write data. Input data is masked when DM
is sampled HIGH, along with the input data, during a write access. DM is sampled on both
edges of DQS. Although the DM pins are input-only, DM loading is designed to match th at
of the DQ and DQS pins.
ODT[1:0] Input On-die termination: ODT enables (registered HIGH) and disables (registered LOW)
termination resistance internal to the DDR2 SDRAM. When enabled in normal operation,
ODT is applied only to the following pins: DQ, DQS, DQS# , DM, and CB. The ODT in put will
be ignore d if disabled via the LOAD MODE command.
RAS#, CAS#,
WE# Input Command inputs: RAS#, CAS#, and WE# (along with S#) define the command being
entered.
RESET# Input Reset: Asynchronously forces all registered outputs LOW when RESET# is LOW. This signal
can be used during power-up to ensure that CKE is LOW and DQ are High-Z.
S#[1:0] Input Chip select: S# enables (registered LOW) and disables (registered HIGH) the command
decoder.
SA[1:0] Input Serial address inputs: These pins are used to configure the SPD EEPROM address range on
the I2C bu s.
SCL Input Serial clock for SPD EEPROM: SCL is used to synchronize communication to and from the
SPD EEPROM.
CB[7:0] I/O Check bits.
DQ[63:0] I/O Data input/output: Bidirectional data bus.
DQS[8:0],
DQS#[8:0] I/O Data strobe: DQS# is used only when differential data strobe mode is enabled via the LOAD
MODE comma nd. Output wit h read data. Edge-aligned with read data. Input with write
data. Center-aligned with write data.
SDA I/O Serial data: SDA is a bidirectional pin used to transfer addresses and data into and out of
the SPD EEPROM on the module on the I2C bus.
EVENT# Output
(open-
drain)
Temperature event: The EVENT# pin is asserted by the temperature sensor when criti ca l
temperature thresholds have been exceeded.
VDD Supply Power supply: 1.8V ±0.1V.
VDDSPD Supply SPD EEPROM power supply: +1.7V to +3.6V.
VREF Supply Reference voltage: VDD/2.
VSS Supply Ground.
NC No connect: These pins are not connected on the module.
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 5©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Functional Block Diagram
Functional Block Diagram
Figure 2: Functional Block Diagram
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
U1b
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U1t
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ32
DQ33
DQ34
DQ35
DQ36
DQ37
DQ38
DQ39
U8b
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U8t
DM CS# DQS DQS# DM CS# DQS DQS# DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
U14b
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U14t
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ16
DQ17
DQ18
DQ19
DQ20
DQ21
DQ22
DQ23
U2b
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U2t
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ24
DQ25
DQ26
DQ27
DQ28
DQ29
DQ30
DQ31
U13b
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U13t
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ40
DQ41
DQ42
DQ43
DQ44
DQ45
DQ46
DQ47
U11b
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U11t
DM CS# DQS DQS# DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ48
DQ49
DQ50
DQ51
DQ52
DQ53
DQ54
DQ55
U9b
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U6t
DM CS# DQS DQS# DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ56
DQ57
DQ58
DQ59
DQ60
DQ61
DQ62
DQ63
U10b
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U10t
DM CS# DQS DQS# DM CS# DQS DQS#
DQS0#
DQS0
DM0
RS0#
RS1#
DQS1#
DQS1
DM1
DQS2#
DQS2
DM2
DQS3#
DQS3
DM3
DQS4#
DQS4
DM4
DQS5#
DQS5
DM5
DQS6#
DQS6
DM6
DQS7#
DQS7
DM7
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
U12b
DM CS# DQS DQS#
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
U12t
DM CS# DQS DQS#
DQS8#
DQS8
DM8
VREF
VSS
DDR2 SDRAM
DDR2 SDRAM
VDD
VDDSPD SPD EEPROM, Temperature Sensor
DDR2 SDRAM
PLL
CK0
CK0#
U6 DDR2 SDRAM x 2
DDR2 SDRAM x 2
DDR2 SDRAM x 2
DDR2 SDRAM x 2
DDR2 SDRAM x 2
Rank 0 = U1b, U2b, U[14b–8b]
Rank 1 = U1t, U2t, U[14t–8t]
A0
SPD EEPROM
A1 A2
SA0
EVENT#
SA1
SDA
SDA
SCL
WP
U5
A0
Temp Sensor
A1 A2
SA0 SA1
EVT
U3
R
e
g
i
s
t
e
r
S0#
S1#
BA[2:0]
A[14/13:0]
RAS#
CAS#
WE#
CKE0
CKE1
ODT0
ODT1
RESET#
RS0#: Rank 0
RS1#: Rank 1
RBA[2:0]: DDR2 SDRAM
RA[14/13:0]: DDR2 SDRAM
RRAS#: DDR2 SDRAM
RCAS#: DDR2 SDRAM
RWE#: DDR2 SDRAM
RCKE0: Rank 0
RCKE1: Rank 1
RODT0: Rank 0
RODT1: Rank 1
U7 VSS VSS
VSS
RESET#
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 6©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
General Description
General Description
The MT18HTS25672RH and MT18HTS51272RH DDR2 SDRAM modules are high-speed,
CMOS dynamic random access 2GB and 4GB memory modules organized in a x72 con-
figuration. These modules use 2Gb TwinDie and 4Gb TwinDie DDR2 SDRAM devices
with eight internal banks.
DDR2 SDRAM modules use double data ra te architecture to achieve high-speed opera-
tion. The double data rate archi t ecture is essentially a 4n-prefetch architecture with an
interface designed to transfer two data words per clock cycle at the I/O pins. A single
read or write access for the DDR2 SDRAM module effectively consis ts of a single
4n-bit-wide, one-clock-cycle data transfer at the internal DRAM core and four corre-
sponding n-bit-wide, one-half-clock-cycle data transfers at the I/O pins.
A bidirectional data strobe (DQS, DQS#) i s transmitted externally, along with data, for
use in data capture at the receiver. DQS is a strobe transmitted by the DDR2 SDRAM
device during READs and by the memory controller during WRITEs. DQS is edge-
aligned with data for READs and center-aligned with data for WRITEs.
DDR2 SDRAM modul es operate from a differential clock (CK and CK#); the crossing of
CK going HIGH and CK# going LOW will be referred to as the positive edge of CK. Com-
mands are registered at every positive edge of CK . Input data is registered on both edges
of DQS, and output data is referenced to both edges of DQS, as well as to both edges of
CK.
Register and PLL Operation
These DDR2 SDRAM modules operate in r egister ed mode , wher e the command/ addr ess
input signals are latched in the registers on the risi ng clock edge and sent to the DDR2
SDRAM devices on the following rising clock edge (data access is delayed by one clock
cycle). A phase-lock loop (PLL) on the module receives and redrives the differential clock
signals (CK, CK#) to the DDR2 SDRAM devices. The register (s) and PLL reduce clock,
control, command, and addr ess sig nals loadi ng by isolating DRAM from the system con-
troller. PLL clock timing is defined by JEDEC specifications and ensured by use of the
JEDEC clock reference board. Registered mode will add one clock cycle to CL.
Temperature Sensor
An onboard temper atur e sensor provides the ability to monitor the module temperatur e
along with monitoring alarms. Programmable registers can be used to specify tempera-
ture events and critical boundaries. An EVENT# pin is used to signal when different con-
ditions occur based on how the registers are defined.
Serial Presence-Detect EEPROM Operation
DDR2 SDRAM modules incorporate ser i al presence -d etect. The SPD data is stored in a
256-b yte EEPROM. The first 128 b ytes ar e programmed b y Micron to identify the module
type and various SDRAM organizations and timing parameters . The remaining 128 b ytes
of storage are av ailable for use by the customer. System RE AD/WRITE operations
between the master (system logic) and the slave EEPROM device occur via a standard
I2C bus using the DIMM’s SCL (clock) and SDA (data) signals, together with SA[1:0],
which provide four unique DIMM/EEPROM addresses. Write protect (WP) is connected
to Vss, permanently disabling hardware write protect.
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 7©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Electrical Specifications
Electrical Specifications
S tresses greater than those listed in Table 7 may cause permanent damage to the d evice.
This is a stress rating only, and functional operation of the device at these or any other
conditions above those indicated in each devices data sheet is not implied. Exposure to
absolute maximum ra ting conditions for extended periods may adversely affect reliabil-
ity.
Notes: 1. Refresh rate is required to double when 85°C < TC 95°C.
2. For fur th e r informatio n, r ef er to technical note TN-00-08: “Thermal Applications,” avail-
able on Micron’s W eb site.
Table 7: Absolute Maximum Ratings
Symbol Parameter Min Max Units
VDD VDD supply voltage relative to VSS –0.5 +2.3 V
VIN, VOUT Voltage on any pin relative to VSS –0.5 +2.3 V
IIInput leakage current; Any input 0V VIN VDD;
VREF input 0V VIN 0.95V (All other pins not under
test = 0V)
Address inputs,
RAS#, CAS#, WE# S#,
CKE, ODT, BA
–5 +5 µA
CK0, CK0# –250 +250
DM –10 +10
IOZ Output leakage current; 0V VOUT VDDQ; DQ and
ODT are disabled DQ, DQS, DQS# –10 +10 µA
IVREF VREF leakage current; VREF = valid VREF level –36 +36 µA
TAModule ambient operating temperature Commercial 0+70°C
Industrial –40 +85 °C
TC1DDR2 SDRAM component case operating
temperature2Commercial 0+85°C
Industrial –40 +95 °C
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 8©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Electrical Specifications
DRAM Operating Conditions
Re commended AC operating conditions are given in the DDR2 component data sheets.
Component specifications are available on Microns Web site. Module speed grades cor-
relate with component speed grades, as shown in Table 8.
Design Considerations
Simulations
Micron memor y mod u le s are designed to optimize signal integrity through carefully
designed terminations, controlled board impedances, routing topologies, trace length
matching, and decoupling. However, good signal integrity starts at the system level.
Micron encourages designers to si mulate the signal character i stics of the systems mem-
ory bus to ensure adequate signal integrity of the entir e memory system.
Power
Operating v oltages ar e specified at the DRAM, not at the edge connector of the module.
Designers must account for any system voltage drops at anticipated power levels to
ensure the required supply voltag e is maintained.
Table 8: Module and Component Speed Grades
DDR2 components may exce ed the listed module sp eed grades
Module Speed Grade Component Speed Grade
-80E -25E
-667 -3
-53E -37E
-40E -5E
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HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 9©2007 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Electrical Specifications
IDD Specifications
Table 9: DDR2 IDD Specifications and Conditions – 2GB
Values are for the MT47H256M8THN DDR2 SDRAM only and are computed from values specified in the
2Gb TwinDie (256 Meg x 8) component data sheet
Parameter/Condition Combined
Symbol -80E -667 -53E -40E Units
Operating one bank active-precharge current: tCK = tCK (IDD),
tRC = tRC (IDD), tRAS = tRAS MIN (IDD); CKE is HIGH, S# is HIGH
between valid commands; Address bus inputs are switching; Data
bus inputs are switching
ICDD0 TBD 873 738 738 mA
Operating one bank active-read-precharge current:
IOUT = 0mA; BL = 4, CL = CL (IDD), AL = 0; tCK = tCK (IDD), tRC = tRC
(IDD), tRAS = tRAS MIN (IDD), tRCD = tRCD (IDD); CKE is HIGH, S# is
HIGH between valid commands; Address bus inputs are switching;
Data pattern is same as IDD4W
ICDD1 TBD 1008 963 918 mA
Precharge power-down current: All device banks idle; tCK = tCK
(IDD); CKE is LOW; Other control and address bus inputs are stable;
Data bus inputs are floating
ICDD2P TBD 126 126 126 mA
Precharge quiet standby current: All device banks idle;
tCK = tCK (IDD); CKE is HIGH, S# is HIGH; Oth e r co ntrol an d address
bus inputs are stable; Data bus inputs are floating
ICDD2Q TBD 603 612 621 mA
Precharge standby current: All device banks idle; tCK = tCK (IDD);
CKE is HIGH, S# is HIGH; Other control and address bus inputs are
switching; Data bus inputs are switching
ICDD2N TBD 468 468 423 mA
Active power-down current: All device banks
open; tCK = tCK (IDD); CKE is LOW; Other control and
address bus inputs are stable; Data bus inputs are
floating
Fast PDN
exit MR[12]
= 0
ICDD3P TBD 270 270 270 mA
Slow PDN
exit MR[12]
= 1
TBD 90 90 90 mA
Active standby current: All device banks open; tCK = tCK (IDD),
tRAS = tRAS MAX (IDD), tRP = tRP (IDD); CKE is HIGH, S# is HIGH
between valid commands; Other control and address bus inputs are
switching; Data bus inputs are switching
ICDD3N TBD 603 513 468 mA
Operating burst write current: All devic e banks open;
Continuous burst writes; BL = 4, CL = CL (IDD), AL = 0; tCK = tCK
(IDD), tRAS = tRAS MAX (IDD), tRP = tRP (IDD); CKE is HIGH, S# is HIGH
between valid commands; Address bus inputs are switching; Data
bus inputs are switching
ICDD4W TBD 1278 1188 1008 mA
Operating burst read current: All device banks open;
Continuous burst reads; IOUT = 0mA; BL = 4, CL = CL (IDD), AL = 0;
tCK = tCK (IDD), tRAS = tRAS MAX (IDD), tRP = tRP (IDD); CKE is HIGH,
S# is HIGH between valid commands; Address bus inputs are
switching; Data bus inputs are switching
ICDD4R TBD 1323 1233 1053 mA
Burst refresh curr ent: tCK = tCK (IDD); REFRESH c ommand at every
tRFC (IDD) interval; CKE is HIGH, S# is HIGH between valid
commands; Other control and address bus inputs are switching;
Data bus inputs are switching
ICDD5 TBD 2043 1998 1953 mA
Self re fresh current: CK and CK# at 0V; CKE 0.2V; Other control
and address bus inputs are floating; Data bus inputs are floating ICDD6 TBD 126 126 126 mA
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Electrical Specifications
Operating bank interleave read current: All device banks
interleaving reads; IOUT = 0mA; BL = 4, CL = CL (IDD), AL = tRCD (IDD)
- 1 × tCK (IDD); tCK = tCK (IDD), tRC = tRC (IDD), tRRD = tRRD (IDD),
tRCD = tRCD (IDD); CKE is HIGH, S# is HIGH between valid
commands; Address bus inputs are stable during deselects; Data
bus inputs are switching
ICDD7 TBD 2628 2538 2448 mA
Table 10: DDR2 IDD Specifications and Conditions – 4GB
Values are for the MT47H512M8THM DDR2 SDRAM only and are computed from values specified in the
4Gb TwinDie (512 Meg x 8) component data sheet
Parameter/Condition Combined
Symbol -667 -53E -40E Units
Operating one bank active-precharge current: tCK = tCK (IDD),
tRC = tRC (IDD), tRAS = tRAS MIN (IDD); CKE is HIGH, S# is HIGH between valid
commands; Address bus inputs are switching; Data bus inputs are switching
ICDD0 1017 927 927 mA
Operating one bank active-read-precharge current: IOUT = 0mA; BL = 4,
CL = CL (IDD), AL = 0; tCK = tCK (IDD), tRC = tRC (IDD), tRAS = tRAS MIN (IDD),
tRCD = tRCD (IDD); CKE is HIGH, S# is HIGH between valid commands; Address
bus inputs are switching; Data pattern is same as IDD4W
ICDD1 1422 1062 1062 mA
Precha rge power-down curre nt: All device banks id le; tCK = tCK (IDD); CKE
is LOW; Other control and address bus inputs are stable; Data bus inputs are
floating
ICDD2P 144 144 144 mA
Precharge quiet standby current: All device banks idle; tCK = tCK (IDD);
CKE is HIGH, S# is HIGH; Other control and address bus inputs are stable;
Data bus inputs are floating
ICDD2Q 567 576 585 mA
Precharge standby current: All device banks idle; tCK = tCK (IDD); CKE is
HIGH, S# is HIGH; Other control and ad dress bus inputs are switching; Data
bus inputs are switching
ICDD2N 657 567 522 mA
Active power-down current: All device banks open;
tCK = tCK (IDD); CKE is LOW; Other control and address bus
inputs are stable; Data bus inputs are floating
Fast PDN exit
MR[12] = 0 ICDD3P 360 315 270 mA
Slow PDN exit
MR[12] = 1 90 90 90 mA
Active standby current: All device banks open; tCK = tCK (IDD),
tRAS = tRAS MAX (IDD), tRP = tRP (IDD); CKE is HIGH, S# is HIGH between valid
commands; Other control and address bus inputs are switching; Data bus
inputs are switching
ICDD3N 612 522 477 mA
Operating burst write current: All device banks open; Continuous burst
writes; BL = 4, CL = CL (IDD), AL = 0; tCK = tCK (IDD), tRAS = tRAS MAX (IDD),
tRP = tRP (IDD); CKE is HIGH, S# is HIGH between valid commands; Address bus
inputs are switching; Data bus inputs are switching
ICDD4W 1422 1242 1197 mA
Operating burst read current: All device banks open; Continuous burst
reads; IOUT = 0mA; BL = 4, CL = CL (IDD), AL = 0; tCK = tCK (IDD),
tRAS = tRAS MAX (IDD), tRP = tRP (IDD); CKE is HIGH, S# is HIGH between valid
commands; Address bus inputs are switching; Data bus inputs are switching
ICDD4R 1647 1656 1665 mA
Table 9: DDR2 IDD Specifications and Conditions – 2GB (continued)
Values are for the MT47H256M8THN DDR2 SDRAM only and are computed from values specified in the
2Gb TwinDie (256 Meg x 8) component data sheet
Parameter/Condition Combined
Symbol -80E -667 -53E -40E Units
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Electrical Specifications
Burst refresh current: tCK = tCK (IDD); REFRESH command at every tRFC
(IDD) interval; CKE is HIGH, S# is HIGH between valid commands; Other
control and address bus inputs are switching; Data bus inputs are switching
ICDD5 2637 2457 2367 mA
Self refresh current: CK and CK# at 0V; CKE 0.2V; Other control and
address bus inputs are floating; Data bus inputs are floating ICDD6 144 144 144 mA
Operating bank interleave read current: All device banks interleaving
reads; IOUT = 0mA; BL = 4, CL = CL (IDD), AL = tRCD (IDD) - 1 × tCK (IDD);
tCK = tCK (IDD), tRC = tRC (IDD), tRRD = tRRD (IDD), tRCD = tRCD (IDD); CKE is
HIGH, S# is HIGH between valid commands; Address bus inputs are stable
during deselects; Data bus inputs are switching
ICDD7 3177 2772 2772 mA
Table 10: DDR2 IDD Specifications and Conditions – 4GB (continued)
Values are for the MT47H512M8THM DDR2 SDRAM only and are computed from values specified in the
4Gb TwinDie (512 Meg x 8) component data sheet
Parameter/Condition Combined
Symbol -667 -53E -40E Units
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Register and PLL Specifications
Register and PLL Specifications
Table 11: Register Specifications
SSTU32872 devices or equivalent
Parameter Symbol Pins Condition Min Max Units
DC high-level
input voltage VIH(DC) Address,
control,
command
SSTL_18 VREF(DC) + 125 mV
DC low-level
input voltage VIL(DC) Address,
control,
command
SSTL_18 VREF(DC) - 125 mV
AC high-level
input voltage VIH(AC) Address,
control,
command
SSTL_18 VREF(DC) + 250 mV
AC low-level
input voltage VIL(AC) Address,
control,
command
SSTL_18 VREF(DC) - 250 mV
Output high voltage VOH Parity output LVCMOS 1.2 V
Output low voltage VOL Parity output LVCMOS 0.5 V
Input current IIAll pins VI = VDDQ or VSSQ –5 5 µA
Static standby IDD All pins RESET# = VSSQ (IO = 0) 2 00 µA
Static operating IDD All pins RESET# = VSSQ;
VI = VIH(AC) or VIL(DC)
IO = 0
–80mA
Dynamic operating
(clock tree) IDDD n/a RESET# = V DD, VI = VIH(AC) or
VIL(AC), IO = 0; CK and CK#
switching 50% duty cycle
–Varies by
manufacturer µA
Dynamic operating
(per each input) IDDD n/a RESET# = VDD, VI = VIH(AC) or
VIL(AC), IO = 0; CK and CK#
switching 50% duty cyc le;
One data input switching at
tCK/2, 50% duty cycle
–Varies by
manufacturer µA
Input capacitance
(per device, per pin) CIAll inputs
except RESET# VI = VREF ±350mV;
VDDQ = 1.8V 2.5 3.5 pF
Input capacitance
(per device, per pin) CIRESET# VI = VDDQ or VSSQ –Varies by
manufacturer pF
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Register and PLL Specifications
Notes: 1. PLL timing and switching specifications are critical for proper operation of the DDR2
DIMM. This is a subset of parameters for the specific PLL used. Detailed PLL information is
available in JEDEC Standard JESD82.
Table 12: PLL Specifications
CUA845 device or equivalent JESD82-21
Parameter Symbol Pins Condition Min Max Units
DC high-level input
voltage VIH OE, OS, CK, CK# LVCMOS 0.65 × VDD –V
DC low-level input voltage VIL OE, OS, CK, CK# LVCMOS 0.35 × VDD V
Input voltage (limits) VIN –0.3 VDD + 0.3 V
Input differential-pair
cross voltage VIX Differential input (VDD/2) - 0.15 (VDD/2) + 0.15 V
Input differential voltage VID(DC) Differential input 0.3 VDD + 0.4 V
Input differential voltage VID(AC) Differential input 0.6 VDD + 0.4 V
Input current IIOE, OS, FBIN, FBIN# VI = VDD or VSS –10 +10 µA
CK, CK# VI = VDD or VSS –250 250 µA
Output disabled current IODL OE = L, VODL = 100mV 100 µA
Static supply current IDDLD C
L = 0pf +500 µA
Dynamic supply IDD n/a CK and CK# = 410 MHz
all output are open
(not connected to a PCB)
–+300mA
Input capacitance CIN Each input VI = VDD or VSS 23pF
Table 13: PLL Clock Driver Timing Requirements and Switching Characteristics
Parameter Symbol Min Max Units
Stabilization time tL–15µs
Input clock slew rate slr(i) 1.0 4 V/ns
SSC modulation frequency 30 33 kHz
SSC clock input frequ ency deviation 0.0 –0.50 %
PLL loop bandwi dth (–3dB from unity gain) 2.0 MHz
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Temperature Sensor
The temperature sensor continuousl y monitors the modul es temperature and can be
read back at any time over the I2C bus shar ed with the serial pr esence-detect (SPD)
EEPROM.
EVENT# Pin
The temperature sensor also adds the E VENT# pin (open-drain). Not used by the SPD
EEPR OM, EVENT# is a temperature sensor output used to flag critical events that can be
set up in the sensor’s configuration register.
EVENT# has thre e defined modes of operati o n: interrupt mode, compare mode , and
critical temperature mode. The open-drain output of EVENT# under the three separate
operating modes is shown in Figure 3 on page 15. Event thresholds are programmed in
the 0x01 register using a hysteresis. The alarm window provides a comparison window,
with upper and lower limits set in the alarm upper boundary register and the alarm
lower boundary register, respe ctively. When the alarm window is enabled, EVENT# trig-
gers whenever the temper ature is outside the MIN or MAX values set by the user.
The interrupt mode enables software to reset EVENT# after a critical temperature
threshold has been detected. Threshold points ar e set in the configuration r egister b y the
user. This mode triggers the critical temper atur e limit and both the MIN and MAX points
of the temperature alarm window.
Table 14: Temperature Sensor Operating Conditions
Parameter/Condition Symbol Min Max Units
Supply voltage VDDSPD +3.0 +3.6 V
Supply current: V DD = 3.3V IDD –+2.0mA
Input high volt ag e: Logic 1; SCL, SDA VIH +1.45 VDDSPD + 1 V
Input low voltage: Logic 0; SCL, SDA VIL –+0.55V
Output low voltage: IOUT = 2.1mA VOL –+0.4V
Input current IIN –5.0 +5.0 µA
Temperature sensing range –40 +125 °C
Temperature sensor accuracy (class B) ––1.0+1.0°C
Table 15: Temperature Sensor Serial Interface Timing
Parameter/Condition Symbol Min Max Units
Time bus must be free before a new transition can start tBUF 4.7 µs
SDA fall time tF20300ns
SDA rise time tR 1000 ns
Data hold time tHD:DAT 200 900 ns
Start condition hold time tH:STA 4.0 µs
Clock HIGH period tHIGH 4.0 50 µs
Clock LOW period tLOW 4.7 µs
SCL clock frequency fSCL 10 100 kHz
Data setup time tSU:DAT 250 ns
Start condition setup time tSU:STA 4.7 µs
Stop condition setup time tSU:STO 4.0 µs
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
The compar e mode is similar to the interrupt mode, except EVENT # cannot be reset by
the user and returns to the logic HIGH state only when the temp erature falls below the
programmed thresholds.
Critical temperature mode triggers EVENT# only when the temperature exceeds the pro-
grammed critical trip point. When the critical trip point is reached, the temperature sen-
sor goes into comparator mode, and the critical EVENT# cannot be cleared through
software.
SM Bus Slave Subaddress Decoding
The temperature sensor’s physical address differs from the SPD EEPROM’s physical
address: binary 0011 for A0, A1, A2, and RW#, where A0, A1, and A2 are the three slave
subaddress pins and the R W# bit is the READ/WRITE flag.
If the slave base address is fixed for the temperature sensor/SPD EEPROM, then pins
A[2:0] set the subaddress bits of the slave address, enabling the devices to be located
anywhere within the eight slave address locations. For example, they could be set from
30h to 3Eh.
Figure 3: EVENT# Pin Functionality
Time
Critical
Alarm window
(MAX)
Alarm window
(MIN)
EVENT#
interrupt mode
EVENT#
comparator mode
EVENT#
critical temperature
only mode
Clears event
Hysteresis affects
these trip points
Temperature
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Pointer Register
The pointer r eg ister selec ts which of the 16-bit registers is being accessed in subsequent
READ and WRITE operations. This register is a write-only register.
Capability Register
The capability register indicates the features and functionality supported b y the temper-
ature sensor. This register is a read-only register.
Table 16: Temperature Sensor Registers
Name Address Power-On Default
Pointer register Not applicable Undefined
Capability register 0x00 0x0001
Configuration register 0x01 0x0000
Alarm temperature upper boundary register 0x02 0x0000
Alarm temperature lower boundary register 0x03 0x0000
Critical temperature register 0x04 0x0000
Temperature register 0x05 Undefined
Table 17: Pointer Register Bits 0–7
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0000Register
select Register
select Register
select Register
select
Table 18: Pointer Register Bits 0–2 Descriptions
Bit 2 Bit 1 Bit 0 Register
000
Capability register
001
Configuration register
010
Alarm temperature upper boundary register
011
Alarm temperat ure lower boundary register
100
Critical temperature register
101
Temper a ture register
Table 19: Capability Register Bits
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
RFU RFU RFU RFU RFU RFU RFU RFU
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RFU RFU RFU TRES1 TRES0 Wider range Precision Has alarm and
critical
temperature
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Configuration Register
Table 20: Capability Register Bit Descriptions
Bit Description
0Basic capability
1: Has alarm and critical trip point capabilities
1Accuracy
0: ±2°C over the active range and ±3°C over the monitor range
1: ±1°C over the active range and ±2°C over the monitor range
2Wider range
0: Temperatures lower than 0°C are clamped to a binary value of 0
1: Temperatures below 0°C can be read
4:3 Temperature resolution
00: 0.5°C LSB
01: 0.25°C LSB
10: 0.125°C LSB
11: 0.0625°C LSB
15:5 0: Must be set to zero
Table 21: Configuration Register (Address: 0x01
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
RFU RFU RFU RFU RFU Hysteresis Shutdown
mode
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Critical lock
bit Alarm lock bit Clear event Event output
status Event output
control Critical event
only Event polarity Event mode
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Table 22: Configuration Register Bit Descriptions
Bit Description Notes
0Event mode
0: Comparator mode
1: Interrupt mode
Event mode cannot be changed if either of the lock
bits is set.
1EVENT# polarity
0: Active LOW
1: Active HIGH
Event # polarity cannot be changed if either of the
lock bits is set.
2Critical event only
0: EVENT# trips on alarm or critical temperature event
1: EVENT# trips only if critical temperature is re ached
3Event output control
0: Event output disabled
1: Event output enabled
4Event status
0: EVENT# has not been asserted by this device
1: EVENT# is being asserted due to an alarm window or
critical temperature cond ition
This is a read-only field in the register. The event
causing the event can be determined from the read
temperature register.
5Clear event
0: No effect
1: Clears the event when the temperature sensor is in the
interrupt mode
6Alarm window lock bit
0: Alarm trips are not locked and can be changed
1: Alarm trips are locked and cannot be changed
7Critical trip lock bit
0: Critical trip is not locked and can be changed
1: Critical trip is locked and cannot be changed
8Shutdown mode
0: Enabled
1: Shutdown
The shutdown mode is a power-saving mode that
disables the temperature sensor.
10:9 Hysteresi s enable
00: Disable
01: Enable at 1.5°C
10: Enable at 3°C
11: Enable at 6°C
When enabled, a hysteresis is applied to temperature
movement around the trip points (see Figure 4 on
page 19). As an example, if the hysteresis register is
enabled to a delta of 6°C, t he preset trip points will
toggle when the temperature reaches the
programmed value. These values will reset when the
temperature drops below the trip points minus the
set hysteresis level. In this case, this would be critical
temperature minus 6°C.
The hysteresis is applied to both the above alarm
window and the below alarm window bits found in
the read-only temperature register (see Table 23 on
page 19). EVENT# is also affected by this register.
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Figure 4: Hysteresis Applied to Temperature Around Trip Points
Notes: 1. TH is the value set in the alarm temperat ure upper boundary trip register.
2. TL is the value set in the alarm tempera ture lower boundary trip register.
3. Hyst is the value set in the hysteresis bits of the configuration regis ter.
Table 23: Hysteresis Applied to Alarm Window Bits in the Temperature Register
Condition
Below Alarm Window Bit Above Alarm Window Bit
Temperature
Gradient Critical Temperature Temperature
Gradient Critical Temperature
Sets Falling TL - Hyst Rising TH
Clears Rising TLFalling TH - Hyst
TH
TL
TH - Hyst
TL - Hyst
Below window bit
Above window bit
1
2
3
3
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Temperature Format
The temperature trip point registers and temper ature readout register use a
2’s complement format to enable negative numbers. The least significant bit (LSB) is
equal to 0.0625°C or 0.25°C depending on which register is referenced. As an example,
assuming an LSB of 0.0625°C:
A value of 0x018C equals 24.75°C
A value of 0x06C0 equals 108°C
A value of 0x1E74 equals –24.75°C
Temperature Trip Point Registers
The upper and lower temperature boundary registe r s are used to set the maximum and
minimum values of the alarm window. LSB for these registers is 0.25°C. All RFU bits in
the register will always report 0s.
Critical Temperature Register
The critical temperature register is used to set the maximum temperature above the
alarm window. The LSB for this register is 0.25°C. All RFU bits in the register will always
report 0s.
Table 24: Alarm Temperature Upper Boundary Register (Address: 0x02)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
000MSB LSB RFU RFU
Alarm window upper boundary temperature
Table 25: Alarm Temperature Lower Boundary Register (Address: 0x03)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
000MSB LSB RFU RFU
Alarm window lower boundary temperature
Table 26: Critical Temperature Register (Address: 0x04)
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
000MSB LSB RFU RFU
Critical temperature trip point
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Temperature Sensor
Temperature Register
The temperature r egister is a read -only register that provides the current temperature
detected by the temperature sensor. The LSB for this register is 0.0625°C with a resolu-
tion of 0.0625°C. The most significant bit (MSB) is 128°C in the readout section of this
register.
The upper three bits of the register are used to monitor the trip points that are set in the
previous t hre e re gisters.
Table 27: Temperature Register (Address: 0x05)
Bit
15 14 13 12 11 10 9876543210
Above
critical
trip
Above
alarm
window
Below
alarm
window
MSB LSB
Temperature
Table 28: Temperature Register Bit Descriptions
BIT Description
13 Below alarm window
0: Temperature is equal to or above the lower boundary
1: Temperature is below alarm window
14 Above alarm window
0: Temperature is equal to or below the upper boun dary
1: Temperature is above alarm window
15 Above critical trip point
0: Temperature is below critical trip point
1: Temperature is above critical trip point
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2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Serial Pr esence-Detect EEPROM
Serial Presence-Detect EEPROM
Notes: 1. For a restart condition or following a WRITE cycle.
2. This parameter is sampled.
3. To avoid spurious start and stop conditi ons, a minimum delay is placed between SCL = 1
and the falling or rising edge of SDA.
4. This specif ication may conflict with SMBus timing specifications.
Serial Presence-Detect Data
For the latest serial presence-detect data, refer to Microns SPD page:
www.micron.com/SPD.
Table 29: SPD EEPROM DC Operating Conditions
Parameter/Condition Symbol Min Max Units
Supply voltage VDDSPD 1.7 3.6 V
Input leakage current: VIN = GND to VDD ILI ±2 µA
Output leakage current: VOUT = GND to VDD ILO 0.05 ±2 µA
Supply current:: VDDSPD = 1.7V, fC = 100kHz
(rise/fall time < 30ns) IDD –1mA
Standby Supply current: VIN = VSSSPD or VDDSPD,
VDDSPD = 1.7V IDD1 –0.5µA
Standby Supply current: VIN = VSSSPD or VDDSPD,
VDDSPD = 3.6V IDD1 –1µA
Input low voltage: (SCL, SDA, WC#) VIL –0.45 VDDSPD × 0.3 V
Input high voltage: Logic 1; All inputs VIH VDDSPD × 0.7 VDDSPD + 1 V
SA0 high voltage: VHV - VDDSPD 4.8V VHV 710V
Output low voltage: IOL = 0.7m A , VDDSPD = 1.7V VOL –0.2V
Output low voltage: IOL = 2.1mA, 2.2V VDDSPD 3.6V VOL –0.4V
Table 30: SPD EEPROM AC Operating Conditions
Parameter/Condition Symbol
VDDSPD < 2.2V VDDSPD 2.2V
Units NotesMin Max Min Max
Clock frequenc y fSCL 10 100 10 400 kHz
Clock pulse widt h hig h time tHIGH 4 0.6 µs
Clock pulse width low time tLOW 4.7 1.3 µs
SDA rise time tR–10.3µs2
SDA fall time tF 0.02 0.3 0.02 0.3 µs 2
Data-in setup time tSU:DAT 0.25 0.1 µs
Data-in hold time tHD:DI 0 0 µs
Data-out hold time tHD:DAT 0.2 0.9 0.2 0.9 ns 4
Data out access time from SCL low tAA:DAT 0.2 3.5 0.2 0.9 µs 3
Start condition setup time tSU:STA 4.7 0.6 µs 1
Start condition hold time tHD:STA 4 0.6 µs
Stop condition setup time tSU:STO 4 0.6 µs
Time between Stop Condition an d next
Start Condition
tBUF 4.7 1.3 µs
WRITE time tW–10 5ms4
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This data sheet contains minimum and maximum limits specified over the power supply and temperature range set forth herein. Although
considered final, these specifications are subject to change, as further product development and data characterization sometimes occur.
2GB, 4GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM
Module Dimensions
PDF: 09005aef828665bd/Source: 09005aef828665a3 Micron Technology, Inc., reserves the right to change products or specifica tions without notice.
HTS18C_256_512x72RH.fm - Rev. F 12/09 EN 23 ©2007 Micron Technology, Inc. All rights reserved.
Module Dimensions
Figure 5: 200-Pin DDR2 SORDIMM
Notes: 1. All dimensions are in millimeters (inches); MAX/MIN or typical (TYP) where noted.
2. The dimensional diagram is for reference only.
3.8 (0.150)
MAX
Pin 1
67.75 (2.667)
67.45 (2.656)
20.0 (0.787)
TYP
1.8 (0.071)
(2X)
0.6 (0.024)
TYP
0.45 (0.018)
TYP
2.0 (0.079) R
(2X)
Pin 199
Pin 200 Pin 2
Front view
2.0 (0.079)
TYP
6.0 (0.236)
TYP
63.60 (2.504)
TYP
3.50 (0.138) TYP
Back view
1.1 (0.043)
0.9 (0.035)
47.4 (1.87)
TYP 11.4 (0.45)
TYP
4.2 (0.165)
TYP
0.5(0.0197) R
16.26 (0.64)
TYP
U1 U2 U5
U6
U8 U9
U10 U11 U12 U13 U14
1.0 (0.039)
TYP
10.0 (0.394)
TYP
1.0 (0.039) R
(2X)
U7
U3
30.15 (1.187)
29.85 (1.175)