Integrated Silicon Solution, Inc. 1-800-379-4774 1
Rev. A
12/19/00
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any
errors which may appear in this publication. © Copyright 2000, Integrated Silicon Solution, Inc.
IS41C82052
IS41LV82052 ISSI®
FEATURES
Fast Page Mode Access Cycle
TTL compatible inputs and outputs
Refresh Interval:
-- 2,048 cycles/32 ms
Refresh Mode: RAS-Only,
CAS-before-RAS (CBR), and Hidden
Single power supply:
5V±10% or 3.3V ± 10%
Byte Write and Byte Read operation via two CAS
Industrial temperature range -40°C to 85°C
DESCRIPTION
The
ISSI
IS41C82052 and IS41LV82052 are 2,097,152 x 8-bit
high-performance CMOS Dynamic Random Access
Memory. The Fast Page Mode allows 2,048 random
accesses within a single row with access cycle time as
short as 20 ns per 4-bit word.
These features make the IS41C82052 and IS41LV82052
ideally suited for high-bandwidth graphics, digital signal
processing, high-performance computing systems, and
peripheral applications.
The IS41C82052 and IS41LV82052 are packaged in 28-pin
300-mil SOJ and 28-pin TSOP (Type II) with JEDEC
standard pinouts.
2M x 8 (16-MBIT) DYNAMIC RAM
WITH FAST PAGE MODE NOVEMBER 2000
KEY TIMING PARAMETERS
Parameter -50 -60 Unit
RAS Access Time (tRAC)5060ns
CAS Access Time (tCAC)1315ns
Column Address Access Time (tAA)
25 30 ns
Fast Page Mode Cycle Time (tPC)
20 25 ns
Read/Write Cycle Time (tRC) 84 104 ns
PRODUCT SERIES OVERVIEW
Part No. Refresh Voltage
IS41C82052 2K 5V ± 10%
IS41LV82052 2K 3.3V ± 10%
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
I/O0
I/O1
I/O2
I/O3
WE
RAS
NC
A10
A0
A1
A2
A3
VCC
GND
I/O7
I/O6
I/O5
I/O4
CAS
OE
A9
A8
A7
A6
A5
A4
GND
PIN DESCRIPTIONS
A0-A10 Address Inputs
I/O0-7 Data Inputs/Outputs
WE Write Enable
OE Output Enable
RAS Row Address Strobe
CAS Column Address Strobe
Vcc Power
GND Ground
NC No Connection
PIN CONFIGURATION
28 Pin SOJ, TSOP (Type II)
2Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
FUNCTIONAL BLOCK DIAGRAM
OE
WE
CAS CAS WE
OE
DATA I/O BUS
COLUMN DECODER
SENSE AMPLIFIERS
MEMORY ARRAY
2,097,152 x 8
ROW DECODER
DATA I/O BUFFERS
CAS
CONTROL
LOGIC
WE
CONTROL
LOGIC
OE
CONTROL
LOGIC
I/O0-I/O7
RAS
RAS
A0-A10
RAS
CLOCK
GENERATOR
REFRESH
COUNTER
ADDRESS
BUFFERS
TRUTH TABLE
Function RAS CAS WE OE Address tR/tCI/O
Standby H H X X X High-Z
Read L L H L ROW/COL DOUT
Write: Word (Early Write) L L L X ROW/COL DIN
Read-Write L L HLLH ROW/COL DOUT, DIN
Hidden Refresh Read LHL L H L ROW/COL DOUT
Write(1) LHL L L X ROW/COL DOUT
RAS-Only Refresh L H X X ROW/NA High-Z
CBR Refresh HL L X X X High-Z
Note:
1. EARLY WRITE only.
Integrated Silicon Solution, Inc. 1-800-379-4774 3
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
Functional Description
The IS41C82052 and IS41LV82052 are CMOS DRAMs
optimized for
high-speed bandwidth, low power applications.
During READ or WRITE cycles, each bit is uniquely
addressed through the 11 address bits. These are entered
11 bits (A0-A10) at a time. The row address is latched by
the Row Address Strobe (RAS). The column address is
latched by the Column Address Strobe (CAS). RAS is
used to latch the first nine bits and CAS is used the latter
ten bits.
Memory Cycle
A memory cycle is initiated by bring RAS LOW and it is
terminated by returning both RAS and CAS HIGH. To
ensures proper device operation and data integrity any
memory cycle, once initiated, must not be ended or
aborted before the minimum tRAS time has expired. A new
cycle must not be initiated until the minimum precharge
time tRP, tCP has elapsed.
Read Cycle
A read cycle is initiated by the falling edge of CAS or OE,
whichever occurs last, while holding WE HIGH. The
column address must be held for a minimum time specified
by tAR. Data Out becomes valid only when tRAC, tAA, tCAC
and tOEA are all satisfied. As a result, the access time is
dependent on the timing relationships between these
parameters.
Write Cycle
A write cycle is initiated by the falling edge of CAS and
WE, whichever occurs last. The input data must be valid
at or before the falling edge of CAS or WE, whichever
occurs last.
Auto Refresh Cycle
To retain data, 2,048 refresh cycles are required in each
32 ms period. There are two ways to refresh the memory:
1. By clocking each of the 2,048 row addresses (A0
through A10) with RAS at least once every 32 ms. Any
read, write,
read-modify-write
o r
RAS-only
cycle refreshes
the addressed row.
2. Using a
CAS-before-RAS
refresh cycle.
CAS-before-RAS
refresh is activated by the falling edge of RAS, while
holding CAS LOW. In CAS-before-RAS refresh cycle,
an internal 9-bit counter provides the row addresses
and the external address inputs are ignored.
CAS-before-RAS is a refresh-only mode and no data
access or device selection is allowed. Thus, the output
remains in the High-Z state during the cycle.
Power-On
After application of the VCC supply, an initial pause of
200 µs is required followed by a minimum of eight
initialization cycles (any combination of cycles contain-
ing a RAS signal).
During power-on, it is recommended that RAS track with
VCC or be held at a valid VIH to avoid current surges.
4Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Parameters Rating Unit
VTVoltage on Any Pin Relative to GND 5V –1.0 to +7.0 V
3.3V –0.5 to +4.6
VCC Supply Voltage 5V –1.0 to +7.0 V
3.3V –0.5 to +4.6
IOUT Output Current 50 mA
PDPower Dissipation 1 W
TACommercial Operation Temperature 0 to +70 °C
Industrial Operation Temperature -40 to +85
TSTG Storage Temperature –55 to +125 °C
Note:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated
in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect reliability.
RECOMMENDED OPERATING CONDITIONS (Voltages are referenced to GND.)
Symbol Parameter Min. Typ. Max. Unit
VCC Supply Voltage 5V 4.5 5.0 5.5 V
3.3V 3.0 3.3 3.6
VIH Input High Voltage 5V 2.4 VCC + 1.0 V
3.3V 2.0 VCC + 0.3
VIL Input Low Voltage 5V –1.0 0.8 V
3.3V –0.3 0.8
TACommercial Ambient Temperature 0 70 °C
Industrial Ambient Temperature -40 85 °C
CAPACITANCE(1,2)
Symbol Parameter Max. Unit
CIN1Input Capacitance: A0-A10(A11) 5 pF
CIN2Input Capacitance: RAS, CAS, WE, OE 7pF
CIO Data Input/Output Capacitance: I/O0-I/O3 7 pF
Notes:
1. Tested initially and after any design or process changes that may affect these parameters.
2. Test conditions: TA = 25°C, f = 1 MHz.
Integrated Silicon Solution, Inc. 1-800-379-4774 5
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
ELECTRICAL CHARACTERISTICS(1)
(Recommended Operating Conditions unless otherwise noted.)
Symbol Parameter Test Condition VCC Speed Min. Max. Unit
IIL Input Leakage Current Any input 0V VIN Vcc 5 5 µA
Other inputs not under test = 0V
IIO Output Leakage Current Output is disabled (Hi-Z) 5 5 µA
0V VOUT Vcc
VOH
Output High Voltage Level
IOH = –5.0 mA, Vcc = 5V 2.4 V
IOH = –2.0 mA, Vcc = 3.3V
VOL
Output Low Voltage Level
IOL = 4.2 mA, Vcc = 5V 0.4 V
IOL = 2 mA, Vcc = 3.3V
ICC1Standby Current: TTL RAS, CAS VIH
Commercial
5V 2 mA
3.3V 0.5
Industrial
5V 3
3.3V 2
ICC2Standby Current: CMOS RAS, CAS VCC – 0.2V 5V 1 mA
3.3V 0.5
ICC3Operating Current: RAS, CAS, -50 120 mA
Random Read/Write(2,3)
Address Cycling, tRC = tRC (min.)
-60 110
Average Power Supply Current
ICC4Operating Current: RAS= VIL, CAS VIH -50 90 mA
Fast Page Mode(2,3,4) tRC = tRC (min.) -60 80
Average Power Supply Current
ICC5Refresh Current: RAS Cycling, CAS VIH -50 120 mA
RAS-Only(2,3) tRC = tRC (min.) -60 110
Average Power Supply Current
ICC6Refresh Current: RAS, CAS Cycling -50 120 mA
CBR(2,3,5) tRC = tRC (min.) -60 110
Average Power Supply Current
Notes:
1. An initial pause of 200 µs is required after power-up followed by eight RAS refresh cycles (RAS-Only or CBR) before proper device
operation is assured. The eight RAS cycles wake-up should be repeated any time the tREF refresh requirement is exceeded.
2. Dependent on cycle rates.
3. Specified values are obtained with minimum cycle time and the output open.
4. Column-address is changed once each Fast Page cycle.
5. Enables on-chip refresh and address counters.
6Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
AC CHARACTERISTICS(1,2,3,4,5,6)
(Recommended Operating Conditions unless otherwise noted.)
-50 -60
Symbol Parameter Min. Max. Min. Max. Units
tRC Random READ or WRITE Cycle Time 84 104 ns
tRAC Access Time from RAS(6, 7) —50 —60 ns
tCAC Access Time from CAS(6, 8, 15) —13 —15 ns
tAA Access Time from Column-Address(6) —25 —30 ns
tRAS RAS Pulse Width 50 10K 60 10K ns
tRP RAS Precharge Time 30 40 ns
tCAS CAS Pulse Width(23) 8 10K 10 10K ns
tCP CAS Precharge Time(9) 9— 9— ns
tCSH CAS Hold Time (21) 38 40 ns
tRCD RAS to CAS Delay Time(10, 20) 12 37 14 45 ns
tASR Row-Address Setup Time 0 0 ns
tRAH Row-Address Hold Time 8 10 ns
tASC Column-Address Setup Time(20) 0— 0— ns
tCAH Column-Address Hold Time(20) 8— 10 ns
tAR Column-Address Hold Time 30 40 ns
(referenced to RAS)
tRAD RAS to Column-Address Delay Time(11) 10 25 12 30 ns
tRAL Column-Address to RAS Lead Time 25 30 ns
tRPC RAS to CAS Precharge Time 5 5 ns
tRSH RAS Hold Time 8 10 ns
tRHCP RAS Hold Time from CAS Precharge 30 35 ns
tCLZ CAS to Output in Low-Z(15, 24) 0— 0— ns
tCRP CAS to RAS Precharge Time(21) 5— 5— ns
tOD Output Disable Time(19, 24) 315 315 ns
tOE Output Enable Time(15, 16) —12 —15 ns
tOED Output Enable Data Delay (Write) 12 15 ns
tOEHC OE HIGH Hold Time from CAS HIGH 5 5 ns
tOEP OE HIGH Pulse Width 10 10 ns
tOES OE LOW to CAS HIGH Setup Time 5 5 ns
tRCS Read Command Setup Time(17, 20) 0— 0— ns
tRRH Read Command Hold Time 0 0 ns
(referenced to RAS)(12)
tRCH Read Command Hold Time 0 0 ns
(referenced to CAS)(12, 17, 21)
tWCH Write Command Hold Time(17) 8— 10 ns
tWCR Write Command Hold Time 40 50 ns
(referenced to RAS)(17)
tWP Write Command Pulse Width(17) 8— 10 ns
tWPZ WE Pulse Widths to Disable Outputs 7 7 ns
Integrated Silicon Solution, Inc. 1-800-379-4774 7
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
AC CHARACTERISTICS (Continued)(1,2,3,4,5,6)
(Recommended Operating Conditions unless otherwise noted.)
-50 -60
Symbol Parameter Min. Max. Min. Max. Units
tRWL Write Command to RAS Lead Time(17) 13 15 ns
tCWL Write Command to CAS Lead Time(17, 21) 8— 10 ns
tWCS Write Command Setup Time(14, 17, 20) 0— 0— ns
tDHR Data-in Hold Time (referenced to RAS)39 39 ns
tACH Column-Address Setup Time to CAS 15 15 ns
Precharge during WRITE Cycle
tOEH OE Hold Time from WE during 8 10 ns
READ-MODIFY-WRITE cycle(18)
tDS Data-In Setup Time(15, 22) 0— 0— ns
tDH Data-In Hold Time(15, 22) 8— 10 ns
tRWC READ-MODIFY-WRITE Cycle Time 108 133 ns
tRWD RAS to WE Delay Time during 64 77 ns
READ-MODIFY-WRITE Cycle(14)
tCWD CAS to WE Delay Time(14, 20) 26 32 ns
tAWD Column-Address to WE Delay Time(14) 39 47 ns
tPC Fast Page Mode READ or WRITE 20 25 ns
Cycle Time
tRASP RAS Pulse Width 50 100K 60 100K ns
tCPA Access Time from CAS Precharge(15) —30 —35 ns
tPRWC READ-WRITE Cycle Time(24) 56 68 ns
tCOH Data Output Hold after CAS LOW 5— 5— ns
tOFF Output Buffer Turn-Off Delay from 0 12 0 15 ns
CAS or RAS(13,15,19, 24)
tWHZ Output Disable Delay from WE 310 310 ns
tCSR CAS Setup Time (CBR REFRESH)(20, 25) 5— 5— ns
tCHR CAS Hold Time (CBR REFRESH)( 21, 25) 8— 10 ns
tORD OE Setup Time prior to RAS during 0 0 ns
HIDDEN REFRESH Cycle
tREF Auto Refresh Period 2,048 Cycles 32 32 ms
tTTransition Time (Rise or Fall)(2, 3) 150 150 ns
AC TEST CONDITIONS
Output load: Two TTL Loads and 50 pF (Vcc = 5.0V ±10%)
One TTL Load and 50 pF (Vcc = 3.3V ±10%)
Input timing reference levels: VIH = 2.4V, VIL = 0.8V (Vcc = 5.0V ±10%);
VIH = 2.0V, VIL = 0.8V (Vcc = 3.3V ±10%)
Output timing reference levels: VOH = 2.0V, VOL = 0.8V (Vcc = 5V ±10%, 3.3V ±10%)
8Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
Notes:
1. An initial pause of 200 µs is required after power-up followed by eight RAS refresh cycle (RAS-Only or CBR) before proper device
operation is assured. The eight RAS cycles wake-up should be repeated any time the tREF refresh requirement is exceeded.
2. VIH (MIN) and VIL (MAX) are reference levels for measuring timing of input signals. Transition times, are measured between VIH and
VIL (or between VIL and VIH) and assume to be 1 ns for all inputs.
3. In addition to meeting the transition rate specification, all input signals must transit between VIH and VIL (or between VIL and VIH) in a
monotonic manner.
4. If CAS and RAS = VIH, data output is High-Z.
5. If CAS = VIL, data output may contain data from the last valid READ cycle.
6. Measured with a load equivalent to one TTL gate and 50 pF.
7. Assumes that tRCD - tRCD (MAX). If tRCD is greater than the maximum recommended value shown in this table, tRAC will increase by the
amount that tRCD exceeds the value shown.
8. Assumes that tRCD tRCD (MAX).
9. If CAS is LOW at the falling edge of RAS, data out will be maintained from the previous cycle. To initiate a new cycle and clear the data
output buffer, CAS and RAS must be pulsed for tCP.
10. Operation with the tRCD (MAX) limit ensures that tRAC (MAX) can be met. tRCD (MAX) is specified as a reference point only; if tRCD is
greater than the specified tRCD (MAX) limit, access time is controlled exclusively by tCAC.
11. Operation within the tRAD (MAX) limit ensures that tRCD (MAX) can be met. tRAD (MAX) is specified as a reference point only; if tRAD is
greater than the specified tRAD (MAX) limit, access time is controlled exclusively by tAA.
12. Either tRCH or tRRH must be satisfied for a READ cycle.
13. tOFF (MAX) defines the time at which the output achieves the open circuit condition; it is not a reference to VOH or VOL.
14. tWCS, tRWD, tAWD and tCWD are restrictive operating parameters in LATE WRITE and READ-MODIFY-WRITE cycle only. If tWCS tWCS
(MIN), the cycle is an EARLY WRITE cycle and the data output will remain open circuit throughout the entire cycle. If tRWD tRWD (MIN),
tAWD tAWD (MIN) and tCWD tCWD (MIN), the cycle is a READ-WRITE cycle and the data output will contain data read from the selected
cell. If neither of the above conditions is met, the state of I/O (at access time and until CAS and RAS or OE go back to VIH) is
indeterminate. OE held HIGH and WE taken LOW after CAS goes LOW result in a LATE WRITE (OE-controlled) cycle.
15. Output parameter (I/O) is referenced to corresponding CAS input.
16. During a READ cycle, if OE is LOW then taken HIGH before CAS goes HIGH, I/O goes open. If OE is tied permanently LOW, a LATE
WRITE or READ-MODIFY-WRITE is not possible.
17. Write command is defined as WE going low.
18. LATE WRITE and READ-MODIFY-WRITE cycles must have both tOD and tOEH met (OE HIGH during WRITE cycle) in order to ensure
that the output buffers will be open during the WRITE cycle. The I/Os will provide the previously written data if CAS remains LOW and
OE is taken back to LOW after tOEH is met.
19. The I/Os are in open during READ cycles once tOD or tOFF occur.
20. Determined by falling edge of CAS.
21. Determined by rising edge of CAS.
22. These parameters are referenced to CAS leading edge in EARLY WRITE cycles and WE leading edge in LATE WRITE or
READ-MODIFY-WRITE cycles.
23. CAS must meet minimum pulse width.
24. The 3 ns minimum is a parameter guaranteed by design.
25. Enables on-chip refresh and address counters.
Integrated Silicon Solution, Inc. 1-800-379-4774 9
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
READ CYCLE
tRAS
tRC
tRP
tAR
tCAH
tASC
tRAD tRAL
OE
I/O
WE
ADDRESS
CAS
RAS
Row Column
Open Open
Valid Data
tCSH
tCAS
tRSH
tCRP tCLCH
tRCD
tRAHtASR
tRRH
tRCHtRCS
tAA
tCAC tOFF(1)
tRAC
tCLC
tOES
tOE tOD
Row
Don’t Care
Note:
1. tOFF is referenced from rising edge of RAS or CAS, whichever occurs last.
10 Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
READ WRITE CYCLE (LATE WRITE and READ-MODIFY-WRITE CYCLES)
t
RAS
t
RWC
t
RP
t
AR
t
CAH
t
ASC
t
RAD
t
RAL
t
ACH
WE
OE
ADDRESS
CAS
RAS
Row Column
t
CSH
t
CAS
t
RSH
t
CRP
t
CLCH
t
RCD
t
RAH
t
ASR
t
RWD
t
CWL
t
CWD
t
RWL
t
AWD
t
WP
t
RCS
t
CAC
t
CLZ
t
DS
t
DH
t
OEH
t
OD
t
OE
t
RAC
t
AA
I/O Open Open
Valid D
OUT
Valid D
IN
Row
Don’t Care
Integrated Silicon Solution, Inc. 1-800-379-4774 11
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
EARLY WRITE CYCLE (OE = DON'T CARE)
tRAS
tRC
tRP
tAR
tCAH
tASC
tRAD tRAL
tACH
I/O
WE
ADDRESS
CAS
RAS
Row Column
tCSH
tCAS
tRSH
tCRP tCLCH
tRCD
tRAHtASR
tCWL
tWCR
tWCH
tRWL
tWP
tWCS
tDH
tDS
tDHR
Valid Data
Row
Don’t Care
12 Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
FAST-PAGE-MODE READ CYCLE
OUT
t
AR
I/O
WE
OE
ADDRESS
CAS
RAS
Row Column Column Column
t
AR
t
CSH
t
CAS
t
CAS
t
CAS
t
RASP
t
RSH
t
PRWC
t
RCD
t
CRP
t
ASR
t
RAD
t
RCS
t
ASC
t
ASC
t
ASC
t
RAL
t
CAH
t
CP
t
CP
t
RP
t
CAH
t
CAC
t
AA
t
CLZ
t
RAC
t
OE
t
CLZ
t
CAC
t
OE
t
CAC
t
OE
OUT
OUT
t
OED
t
OED
t
OED
t
CLZ
t
AA
t
AA
t
RAH
t
CPWD
t
CPWD
t
CAH
t
CRP
Integrated Silicon Solution, Inc. 1-800-379-4774 13
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
FAST-PAGE-MODE READ WRITE CYCLE (LATE WRITE and READ-MODIFY-WRITE Cycles)
OUT
t
AR
t
RWD
t
AWD
I/O
WE
OE
ADDRESS
CAS
RAS
Row Column Column Column
t
AR
t
CSH
t
CAS
t
CAS
t
CAS
t
RASP
t
RSH
t
PRWC
t
RCD
t
CWD
t
CWD
t
CWD
t
CRP
t
ASR
t
RAD
t
RCS
t
ASC
t
ASC
t
ASC
t
RAL
t
CAH
t
CP
t
CP
t
RP
t
CAH
t
AWD
t
AWD
t
CAC
t
AA
t
DH
t
CLZ
t
RAC
t
DH
t
DH
t
OEA
t
CLZ
t
CAC
t
OEA
t
CAC
t
OEA
OUT
OUT ININ IN
t
OEZ
t
OEZ
t
OED
t
OED
t
DS
t
OEZ
t
OED
t
DS
t
CLZ
t
AA
t
AA
t
WP
t
RAH
t
WP
t
WP
t
CWL
t
CWL
t
CWL
t
RWL
t
CPWD
t
CPWD
t
CAH
t
CRP
t
DS
Don’t Care
14 Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
FAST PAGE MODE EARLY WRITE CYCLE
tAR
I/O
WE
OE
ADDRESS
CAS
RAS
Row Column Column Column
tAR
tCWL
tWCR
tDHR
tCSH
tCAS tCAS tCAS
tRASP
tRSH
tRHCP
tPC
tRCD
tCRP
tASR
tWCS
tDS
tRAD
tASC tASC tASC
tRAL
tCAH
tWCH
tDH tDS tDS
tDH tDH
tCP tCP
tRP
tCAH
tRAH tCAH
tCRP
tCWL
tWCS tWCS
tWCH
tWP tWP
tCWL
tWCH
tWP
Valid DIN Valid DIN
Valid DIN
Don’t Care
Integrated Silicon Solution, Inc. 1-800-379-4774 15
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
RAS-ONLY REFRESH CYCLE (OE, WE = DON'T CARE)
t
RAS
t
RC
t
RP
I/O
ADDRESS
CAS
RAS
Row
Open
t
CRP
t
RAH
t
ASR
t
RPC
Row
Don’t Care
16 Integrated Silicon Solution, Inc. 1-800-379-4774
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
HIDDEN REFRESH CYCLE(1) (WE = HIGH; OE = LOW)
CBR REFRESH CYCLE (Addresses; WE, OE = DON'T CARE)
tRAS tRAStRP tRP
I/O
CAS
RAS
Open
tCP
tRPC
tCSR
tCHR tRPC
tCSR
tCHR
tRAS tRAS
tRP
CAS
RAS
tCRP tRCD tRSH tCHR
tAR
tASC
tRAD
ADDRESS Row Column
tRAHtASR
tRAL
tCAH
I/O Open Open
Valid Data
tAA
tCAC
tRAC
tCLZ
tOFF(2)
OE
tOE
tORD
tOD
Don’t Care
Don’t Care
Integrated Silicon Solution, Inc. 1-800-379-4774 17
Rev. A
12/19/00
IS41C82052
IS41LV82052 ISSI
®
ORDERING INFORMATION
Industrial Range: -40°°
°°
°C to 85°C
Voltage: 5V
Speed (ns) Order Part No. Package
50 IS41C82052-50JI 300-mil SOJ
50 IS41C82052-50TI TSOP (Type II)
60 IS41C82052-60JI 300-mil SOJ
60 IS41C82052-60TI TSOP (Type II)
Voltage: 3.3V
Speed (ns) Order Part No. Package
50 IS41LV82052-50JI 300-mil SOJ
50 IS41LV82052-50TI TSOP (Type II)
60 IS41LV82052-60JI 300-mil SOJ
60 IS41LV82052-60TI TSOP (Type II)
ISSI
®
Integrated Silicon Solution, Inc.
2231 Lawson Lane
Santa Clara, CA 95054
Tel: 1-800-379-4774
Fax: (408) 588-0806
E-mail: sales@issi.com
www.issi.com
ORDERING INFORMATION
Commercial Range: 0°°
°°
°C to 70°°
°°
°C
Voltage: 5V
Speed (ns) Order Part No. Package
50 IS41C82052-50J 300-mil SOJ
50 IS41C82052-50T TSOP (Type II)
60 IS41C82052-60J 300-mil SOJ
60 IS41C82052-60T TSOP (Type II)
Voltage: 3.3V
Speed (ns) Order Part No. Package
50 IS41LV82052-50J 300-mil SOJ
50 IS41LV82052-50T TSOP (Type II)
60 IS41LV82052-60J 300-mil SOJ
60 IS41LV82052-60T TSOP (Type II)