21324-DSH-001-C Mindspeed Technologies®November 2009
Mindspeed Proprietary and Confidential
Applications
• SMPTE Coaxial Cable Interface
• Studio video applications
• Broadcast video applications
• Distribution video applications
Standards Compliance
• SMPTE 259M, SMPTE 292M, SMPTE 344M, SMPTE 424M
complaint
• Supports DVB-ASI (270 Mbps)
The M21324 is a high-speed, low-power, adaptive co-axial cable equalizers designed to increase the maximum
low-jitter transmission distance of serial digital interface (SDI) video signals and DVB-ASI across co mm o nly used
bandwidth-limitin g 75Ω coaxial cable . This de vice automatically opt imizes the tran sfer fu nction based on the bit rate
and cable length to minimize the inter-symbol interference (ISI) jitter caused by the cable and to remove the DC
offset components introduced with the pathological test pattern and AC coupling in systems.
The M21324 is designed to support 2xHD data rates from 143 Mbps to 2970 Mbps.
The low-noise, high-g ain equalizer allows for low jitter 2xHD transmissions up to 100m (Belden 1694A) and HD
transmissio ns up to a length of 200m (Belden 1694A) and 120m (Belden 8281). For SD data rates, cab le lengths
up to 400m (Belden 1694A) and 300m (Belden 8281) are supported.
The M21324 share s the same footprint as the GS2974A, GS157 4/GS1574 A or G S9074A, except that the M21324
has a shared Signal Detect/Mute function pin, while the GS2974A, GS1574/1574A and GS9074A have separa te
CD and mute pins.
Functional Block Diagram
THRESH
SDI
SDI
EQUALIZER
CORE
INPUT
BUFFER
0
1
DC
RESTORE
OUTPUT
BUFFER
SDO
SDO
CONTROL
LOGIC
SD/ MUTE
EQ_BYP
M21324
Cable Equalizer
Features
• Adaptive cable equalization
• Optimized data rate from 143 Mbps to 2.97 Gbps
• Typical equalized length of Belden 1694A cable: 100m at 2.97 Gbps,
200m at 1.485 Gbps, and 400m at 270 Mbps
• Programmable mute level
• Manual bypass mode
• Differential CML outputs (50 Ω on-chip terminations)
• Single 3.3V power supply
• Small form factor (4x4mm, 16-pin MLF package)
• Pb-free and RoHS compliant
• Extended operating temperature range: –10 to +85 °C
M21324 SD, HD, 2xHD Cable Equalizer
21324-DSH-001-C Mindspeed Technologies®2
Mindspeed Proprietary and Confidential
Ordering Information
Part Number Package Operating Data Rate Operating Temperature
M21324G-13* 16-pin MLF (RoHS compliant) 143–2970 Mbps –10 °C to 85 °C
* Consult the price list for exact part number when ordering.
* The letter ‘G’ designator after the part number indicates a RoHS-compliant package. Refer to www.mindspeed.com for additional information .
Revision History
Revision Level Date Description
C Released November 2009 Updated for -13 part.
Added marking diagram.
B Released August 2007 Added θJA (Junction to Ambient Thermal Resistance) to Ta b l e 1 - 2 .
A Preliminary August 2007 Preliminary Release.
M21324 Marking Diagram
32413
Lot #
Date and Country
21324-DSH-001-C Mindspeed Technologies®3
Mindspeed Proprietary and Confidential
Table of Contents
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.0 Product Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.2 Input/Output Level Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.3 EQ Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1.4 Package Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
1.4.1 Mechanical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.5 Manufactureability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.1 Electrostatic Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.2 Peak Reflow Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.3 Moisture Sensitivity Level (MSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.6 Design Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.6.1 Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.0 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.1.1 General Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.1.2 High-Speed Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.1.3 High-Speed Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1.4 Adaptive Equalization Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1.5 Output Mute and Signal Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1.6 Equalizer Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.2 M21324 Common Signals by Interface Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.2.1 M21324 Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
A.1 Glossary of Terms/Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
A.2 Reference Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
A.2.1 External . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
21324-DSH-001-C Mindspeed Technologies®4
Mindspeed Proprietary and Confidential
List of Figures
Figure 1-1. Output Symbols Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 1-2. M21324 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Figure 1-3. M21324 Packaging Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 2-1. Single-ended Typical Input Matching/Termination Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 2-2. Test Setup Diagram for Cable Equalizer Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
21324-DSH-001-C Mindspeed Technologies®5
Mindspeed Proprietary and Confidential
List of Tables
Table 1-1. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 1-2. Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 1-3. Power DC Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 1-4. CMOS Input Electrical Specifications (Logic Signals Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 1-5. High Speed Input Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 1-6. High Speed Output Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Table 1-7. Cable Equalizer Distance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 1-8. SD/MUTE Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 2-1. Power Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Table 2-2. High-speed Signal Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Table 2-3. Control/Interface Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
21324-DSH-001-C Mindspeed Technologies®6
Mindspeed Proprietary and Confidential
1.0 Product Specification
1.1 General Specifications
Table 1-1. Absolut e Maximum Ratings
Symbol Parameter Minimum Maximum Units
AVDD Positive Supply AVSS – 0.5 AVSS + 3.6 V
VIOAM Any I/O pin AVSS – 0.5 AVDD + 0.5 V
TSTORE Storage Temperature –65 +150 °C
ESDHBML Human Body Model (low-speed) 2000 — V
ESDHBMH Human Body Model (high-speed) 2000 — V
ESDCDM Charge Device Model 500 — V
NOTE:
1. No Damage.
Table 1-2. Recommended Operating Conditions
Symbol Parameter Notes Minimum Typical Maximum Units
AVDD Supply Voltage — –5 3.3 +5 %
TAMB Ambient Temperature — –10 — +85 °C
θJA Junction to Ambient Thermal Resistance 1, 2 — 44.5 — °C/W
NOTES:
1. Mounted on multi layer board (≥ 4 layers).
2. Airflow = 0.0 m/s.
Table 1-3. Power DC Electrical Specifications
Symbol Parameter Notes Minimum Typical Maximum Units
Total IDD Supply Current 1 — 70 90 mA
PDISS Total Power Dissi pation (@3.3V) 1, 2, 3 — 230 312 mW
NOTES:
1. Specified at recommended operating conditions—see Table 1-2.
2. Includes on-chip power dissipation as well as off-chip power dissipated by termination resistors.
3. Typical calculated at nominal supply voltage, maximum calculated at nominal supply voltage + 5%.
Product Specification
21324-DSH-001-C Mindspeed Technologies®7
Mindspeed Proprietary and Confidential
1.2 Input/Output Level Specifications
Table 1-4. CMOS Input Electrical Specific ations (Logic Signals On ly)
Symbol Parameter Notes Minimum Typical Maximum Units
VIH Input Logic High Voltage 1 0.75 x AVDD —AV
DD + 0.3 V
VIL Input Logic Low Voltage 1 0 — 0.25 x AVDD V
IIH Input Current (logic high) 1 –100 — 100 μA
IIL Input Current (logic low) 1 –100 — 100 μA
NOTE:
1. Specified at recommended operating conditions—see Table 1-2. Spec is for a max load of 20 pF.
Table 1-5. High Speed Input Electrical Specifications
Symbol Parameter Notes Minimum Typical Maximum Units
DRIN Input Bit Rate 1 143 — 2970 Mbps
VID Input Voltage Range with 0m of cable, p-p 1, 5 700 800 1200 mV
VICM Input Common-Mode Voltage 1, 4 — 2.75 — V
CIN Input capacitance 1, 4 — 0.5 — pF
RIN Input resistance 1, 4 — 1.6 — kΩ
S11 Input Return Loss (5 MHz to 1.5 GHz) 1, 2, 3 20 30 — dB
Input Return Loss (1.5 GHz to 3 GHz) 1, 2, 3 — 13 — dB
NOTES:
1. Specified at recommended operation conditions—see Table 1-2.
2. Using the recommended input termination shown in Figure 2-1.
3. Measured single ended.
4. Guaranteed by design.
5. This is also the recommended cable launch level (far end).
Product Specification
21324-DSH-001-C Mindspeed Technologies®8
Mindspeed Proprietary and Confidential
Table 1-6. High Speed Output Electrical Specifications
Symbol Parameter Notes Minimum Typical Maximum Units
tr/tfRise/Fall Time (20%–80%) 1, 2, 7 — 100 120 ps
tr/tfmm Rise/Fall Time Mismatch 1, 2, 7 — 0 30 ps
DCDODuty Cycle Distortion (DCD) 1, 2, 5, 6 — 0 15 ps
VOD Differential Output Volt age p-p 1, 3 600 750 950 mV
VOCM Common mode Voltage 1, 3, 4 — AVDD – 0.205 — V
ZOInternal Output Termination Resistance to AVDD 140 50 60Ω
NOTES:
1. Specified at recommended operation conditions—see Table 1-2.
2. With 100Ω differential termination.
3. With 50Ω to AV DD termination.
4. Outputs DC-coupled.
5. Duty Cycle Distortion (DCD) is defined as the difference in the intrinsic jitter at the 50% voltage level and the intrinsic jitter at the rising/falling
edge crossing point. If the rising/falling edge crossing point is at the 50% voltage level, then DCD = 0.
6. Measured with a 1010 pattern.
7. Measured with a PRBS23 pattern.
Product Specification
21324-DSH-001-C Mindspeed Technologies®9
Mindspeed Proprietary and Confidential
Figure 1-1. Output Symbols Definition
VOD
trtf
VOH
VOL
JOPP
VOH: Average voltage high level
VOL: Average voltage low level
VOD: (VOH) – (VOL)
VOCM: Common Mode Voltage
JOPP: Output Jitter Peak-Peak
tr: 20-80% Rise Time
tf: 80-20% Fall Time
VOCM
NOTE: Waveform above is differential.
Product Specification
21324-DSH-001-C Mindspeed Technologies®10
Mindspeed Proprietary and Confidential
1.3 EQ Specifications
Table 1-7. Cable Equalizer Distance Specificat ions
Symbol Parameter Conditions Notes Minimum Typical Maximum Units
LENSD Max Cable Length Belden 1694A 1, 4 — 400 — m
Max Cable Length Belden 8281 1, 4 — 300 — m
LENHD Max Cable Length Belden 1694A 2, 6 — 200 — m
Max Cable Length Belden1694A 2, 5 — 140 — m
Max Cable Length Belden 8281 2, 5 — 120 — m
LEN2xHD Max Cable Length Belden 1694A 3, 7 — 100 — m
NOTES:
Entire table specified at recommended operating conditions—see Table 1-2.
1. Data Rate = 270 Mbps.
2. Data Rate = 1485 Mbps.
3. Data Rate = 2970 Mbps.
4. Error Free with timing Jitter typically = 0.2 UI, pathological pattern.
5. Error Free with alignment Jitter typically = 0.25 UI, pathological pattern.
6. Error Free with alignment jitter typic a ll y = 0. 3 UI, pathologic a l pattern.
7. Error Free with alignment Jitter typically = 0.35 UI, pathological pattern.
Table 1-8. SD/MUTE Specifications
Symbol Parameter Notes Minimum Typical Maximum Units
VMUT_LO Output voltage when input signal detected 1 — 0.16 x AVDD —V
VMUT_HI Output voltage when input signal not detected 1 — 0.95 x AVDD —V
NOTE:
1. Specified at recommended operating condition—see Table 1-2.
Product Specification
21324-DSH-001-C Mindspeed Technologies®11
Mindspeed Proprietary and Confidential
1.4 Package Specification
The pin assignment is illustrated in Figure 1-2. The M21324 package is RoHS compliant. This package is
bac kwards compatible with the standard soldering tec hniques as defined in JEDEC-STD-020C (SnPb Process).
Figure 1-2. M21324 Pin Assignments
CENTER PAD
AV
16 15 14 13
5 6 7 8
1
2
4
3
12
11
9
10
SS
AGC
AGC
SD0SDI
SDI
AV SS
EQ_BYP NC
AV SS
AV DD
AV DD
SD/MUTE
AV SS
AV SS
SD0
THRESH
Product Specification
21324-DSH-001-C Mindspeed Technologies®12
Mindspeed Proprietary and Confidential
1.4.1 Mechanical Description
The package for the M21324 is illustrated in Figure 1-3 belo w.
Please see Amkor’s Application Note for PCB footprint (referenced in the Section A.2.1).
Figure 1-3. M21324 Packaging Detail s
4.000±0.050
4.000±0.050
SIDE VIEW
0.203 Ref.0.000-0.050
1) TSLP AND SLP SHARE THE SAME EXPOSE OUTLINE
NOTE:
MIN.
NOM.
A
0.700
0.750
0.800
0.850
BUT WITH DIFFERENT THICKNESS:
MAX. 0.800
TSLP SLP
0.900
TOP VIEW BOTTOM VIEW
(4x4mm)
16L T/SLP
BY MARKING
PIN 1 DOT
2.760±0.050
Exp.DAP
PIN #1 IDENTIFICATION
CHAMFER 0.350 X 45˚
1.950
Ref.
0.650 Bsc
0.400±0.050
2.755±0.050
Exp.DAP
0.350±0.050
4.000
Product Specification
21324-DSH-001-C Mindspeed Technologies®13
Mindspeed Proprietary and Confidential
1.5 Manufactureability
The values show n in this section may change; however, these are standard requirements.
1.5.1 Electrostatic Discharge
Tested per JESD22-A114. This device passes 2000V of ESD Human Body Model (HBM) testing.
Tested per JESD22-C101. This device passes 500V of ESD Charged Device Model (CDM) testing.
Tested per EIA/JESD78. This device passes 150mA of trigger current at 85°C during Latchup testing.
1.5.2 Peak Reflow Temperature
M21324G (RoHS compliant package): Peak reflow temperature is 260°C per JEDEC standards.
1.5.3 Moisture Sensitivity Level (MSL)
All versions of this device (Std Pb-type and RoHS compliant packages) are Moisture Sensitivity Leve l (MSL) 3 per
J-STD-020B and J-STD-033.
1.6 Design Considerations
See Digital Video Interfacing Application Note (212xx-APP-001-A) for guidance on the following:
• Component Placement and Layout
• Routing Considerations
1.6.1 Thermal Considerations
The M21324 consumes less pow er than legacy devices, therefore they will contribute less thermal energy and
should result in a lower operating temperature.
21324-DSH-001-C Mindspeed Technologies®14
Mindspeed Proprietary and Confidential
2.0 Functional Description
2.1 Pin Descriptions
2.1.1 General Nomenclature
Throughout this data sheet, physical pins will be denoted in BOLD print.
2.1.2 High-Speed Input
Digital video coaxial cables are AC-coupled to the high-speed low-noise inputs , SDI/SDI, which, are designed to
operate in both the single-ended or di fferential mode. The typical application is single-ended into the no n-inverting
SDI input with the inverting SDI input biased to match the bias on the input used.
The M21324 doe s not contain an y internal input terminations and require b oth e xternal input termination as well as
the matching circuit to exceed the SMPTE input return loss specifications. The package and IC design of the
M21324 has been optimized for high-speed performance, allowing them to exceed the SD/HD SMPTE return loss
spec by 5 dB to 10 dB, using the recommended external matching/termination network and commonly employed
right-angle, through-hole, or vertical mount 75Ω BNC connectors. For non-inverting single-ended operation, the
recommended input circuit is shown in Figure 2-1. For differential operation, the matching/termination circuit on
SDI should be duplicated on SDI. The internal pull ups automatically bias SDI/SDI for proper AC coupled
operation.
Figure 2-1. Single-ended Typical Input Matching/Termination Network
8.2 nH
SDI
SDI
4.7 μF
BNC
4.7 μF
75Ω
37.5Ω
75Ω
M21324
Functional Description
21324-DSH-001-C Mindspeed Technologies®15
Mindspeed Proprietary and Confidential
2.1.3 High-Speed Outputs
The high-spe e d differential outpu ts afte r eq ua liza tio n ar e mad e available on the SDO/SDO pins. The output swing
and common-mode is compat ible with the GS2974/GS2974A, GS1574/GS1574A and GS9074A.
2.1.4 Adaptive Equalization Selection
In typical operation, the adaptive equalization is enabled with EQ_BYP = Lo w; however, with EQ_BYP = High, the
adaptive equalization and DC rest or e circ uit is bypassed and the input is fed directly to the output.
2.1.5 Output Mute and Signal Detect
When configured as an inpu t by forcing a voltage on SD/MUTE = High (Vdd), the output of the M21324 will be
inhibited at logic low (outputs muted). When SD/MUTE = Low (Vss), the output is never muted and the
programmable cable length based mute function is disab led.
When tied to a high-impedance input or left floating, t he program mable inhibi t based on cab le length is enab led and
the pin is defined as an L OS outp ut (logic). I n the event o f an LO S, the output is muted. The inh ibit thre sh old is set
with an analog voltage applied to the THRESH input pin, this threshold will depend on cable type (e.g. Belden
1694A or 8281). To achieve maximu m cable length equalization, the THRESH pin should b e left open. Decouplin g
capacitors should be used between the THRESH pin and GND.
2.1.6 Equalizer Detailed Description
The basic equalizer design consists of interlaced stages of gain and equalization to maximize both the overall
equalization gain as well as the input sensitivity for maximum performance with minimum jitter. In order to achieve
maximum distance at 270 Mbps, 1485 Mbps and 2970 Mbps with Belden 1694A, the overall equalizer block has
over 50 dB of broadband signal boost and maintains an input se nsitivity of approximately 10 mV. Using a high-
performance silicon process, high gain-bandwidth products are achieved allowing for high-performance, wide
dynamic range design with minimum power dissipation.
Since signals are launched with different SMPTE specified rise and fall times which can vary substantially
(especially at the receive end after going though a wide dynamic range of valid cable lengths) the equalization
routine determines both the bit r ate and the r esultant signal HF at tenuation as opposed to just looking at the launch
edge rates . By det ermining both sets of conditions , it is p ossible to optimiz e the equaliz er for the diff erent rates . F or
example, the M21324 maintains the same maximum cable length as optimized SD only equalizers. An SD signal
through a short cable can have the same edge rate as a HD signal thro ugh a long cable; yet, both conditions
require different levels of equalization as well as different optimiz ed inverse-transfer functions. The advanced
equalization techn ology can make the d istinction between the two cases for optimal performance. This also leads
to proper mute threshold (THRESH) that is independent of the bit rate.
In order to accommodate both the SMPTE worst case equalizer pathological patterns as well as some customer
derived worst case DC offset patterns, a high-gain slicer is included in the signal path to correct for any eye-
crossing wander due to AC coupling of the input. Figure 2-2 shows the test setup used by Mindspeed to evaluate
the performance of the M21324.
Functional Description
21324-DSH-001-C Mindspeed Technologies®16
Mindspeed Proprietary and Confidential
2.2 M21324 Common Signals by Interface Group
Figure 2-2. Test Setup Diagra m for Cable Equalizer Evaluation
Table 2-1. Power Pins
Pin Name Pin Number Function Type
AVSS 1, 4, 9, 12 Ground Power
AVDD 13, 16 Positive Supply Power
Center Pad — Chip Ground Power
Table 2-2. High-speed Signal Pins
Pin Name Pin Number Function Type
SDI/SDI 2, 3 Non-inverting and Inverting Serial Data Input to the adaptive equalizer I—AC coupled high speed
SDO/SDO 11, 10 Non-inverting and Inverting Differential Serial Data Output O—High speed CML
Multi-Rate Video
Pattern Generator
75Ω Coaxial Cable
M21324
Cable
Equalizer
M21328
Cable
Driver
Multi-Rate Video
Monitor
Functional Description
21324-DSH-001-C Mindspeed Technologies®17
Mindspeed Proprietary and Confidential
2.2.1 M21324 Pins
Table 2-3. Control/Interface Pins
Pin Name Pin Number Function Default Type
AGC/AGC 5, 6 External AGC (Automatic Gain Control) capacitor connection points.
Use 1.0uF capacitor. Internal pull up Analog
EQ_BYP 7 Input control signal that when enabled (High) bypasses the inputs
directly to the output stage.
Low = Normal operation
High = Disables EQ and bypasses input to output
Internal pull down I—CMOS
NC 14 Internal, no connection. Mute not available on this pin N/A N/A
THRESH 8 Input control signal voltage. Programmable cable length forced mute
threshold. This function is disabled if SD/MUTE = Low Internal pull down Analog
SD/MUTE 15 Bidirectional Signa l that can be used as an input control signal or as an
output status indicator.
When configured as an input by for cing a v oltage on SD/MUTE = High,
the SDO outputs will be inhibited at logic low (outputs muted). See
Table 1-4 for levels.
When SD/MUTE = Low (Vss), the output is never muted and the
programmable cable length based mute function is disabled.
When configured as an output (tied to a high-impedance input) or left
floating, the programmable inhibit based on cable length is enabled
Configured as Output:
Low = Input signal detect
High = Loss of signal
Configured as Input:
Low = Never mute
High = Force Mute
— I/O
NOTE:
Internal pull-up/pull-down i s 100 kΩ.
NC: GS2974A, GS1574/GD1574A and GS9074 use this pin as MUTE.
21324-DSH-001-C Mindspeed Technologies®18
Mindspeed Proprietary and Confidential
Appendix
A.1 Glossary of Terms/Acronyms
BER Bit Error Rate
CD Cable Driver
CDA Cable Distribution Amplifier
CML Current Mode Logic
DDI Differential Data Inputs
DTV Digital Television
DVB Digital Video Broadcast
EMI Electro Magnetic Interference
EQ Equalizer or Equalization
ESD Electro Static Discharge
GREEN Environmentally friendly
HD High Definition
HW Hardware
ID Identifier
I/O Input/Output
MLF Micro Lead Frame package (also called QFN)
RoHS Restriction of Hazardous Substances
SD Standard Definition
SDI Serial Digital Input
SDO Serial Digital Output
SE Single Ended
SMPTE Society of Motion Picture and Television Engineers
SW Software
Appendix
21324-DSH-001-C Mindspeed Technologies®19
Mindspeed Proprietary and Confidential
A.2 Reference Documents
A.2.1 External
The following external documents were referenced in this data sheet.
• Application Notes for Surface Mount Assembly of Amkor’s MicroLeadFrame (MLF) Packages
• Amkor Technology Thermal Test Report TT-00-06 (See http://www.amk or.com for detailed information)
• SMPTE 292M, SMPTE 259M, SMPTE 344M, SMPTE424M
• ESI TR101 891 DVB Asynchronous Serial Interface (ASI)
www.mindspeed.com
General Information:
Telephone: (949) 579-3000
Headquarters - Newport Beach
4000 MacArthur Blvd., East Tower
Newport Beach, CA 92660
© 2007-2009 Mindspeed Technologies®, Inc. All rights reserved.
Information in this document is provided in connection with Mindspeed Technologies® ("Mindspeed®") products.
These materials are pro vided by Mindspeed as a service to its customers and may be used for informational
purposes only. Except as provided in Mindspeed’s Terms and Conditions of Sale for such products or in any
separate agreement rela ted to this document, Mindspeed assumes no liability whatsoever. Mindspeed assumes
no responsibility for errors or omissions in these materials. Mindspeed may make changes to specifications and
product descriptions at an y time, without notice. Mindspeed makes no commitment to update the information and
shall have no responsibility whatsoever fo r conflicts or incompatibilities arising from future changes to its
specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any
intellectual property rights is granted by this document.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, RELATING TO SALE AND/OR USE OF MINDSPEED PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTA L
DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER
INTELLECTUAL PROPERTY RIGHT. MINDSPEED FURTHER DOES NOT WARRANT THE ACCURACY OR
COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN
THESE MATERIALS. MINDSPEED SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS,
WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
Mindspeed products are not intended for use in medical, lifesaving or life sustaining applications. Mindspeed
customers using or selling Mindspeed products for use in such applications do so at their own risk and agree to
fully indemnify Mindspeed for any damages resulting from such improper use or sale.
21324-DSH-001-C Mindspeed Technologies®20
Mindspeed Proprietary and Confidential
