Manufacturer Part NumberDS32EV400SQ/NOPB
ManufacturerNational Semiconductor
DS32EV400SQ/NOPB datasheet

Specifications of DS32EV400SQ/NOPB

ApplicationsSignal ProcessingInterfaceSerial
Voltage - Supply2.5V, 3.3VPackage / Case48-LLP
Mounting TypeSurface MountFor Use WithDS32EV400-EVK - KIT EVALUATION
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesDS32EV400SQTR
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DisplayPort ™ Quad Equalizer
General Description
The DS32EV400 programmable quad equalizer provides
compensation for transmission medium losses and reduces
the medium-induced deterministic jitter for four NRZ data
channels. The DS32EV400 is optimized for operation up to
3.2 Gbps for both cables and FR4 traces. Each equalizer
channel has eight levels of input equalization that can be pro-
grammed by three control pins, or individually through a Serial
Management Bus (SMBus) interface. The device equalizes
up to 14 dB of loss at 3.2 Gbps.
The equalizer supports both AC and DC-coupled data paths
for long run length data patterns such as PRBS-31, and bal-
anced codes such as 8b/10b. The device uses differential
current-mode logic (CML) inputs and outputs.
Each channel has an independent signal detect output and
independent enable input. The SD output maybe tied to the
EN to automatically control the power up and down of the
The DS32EV400 can be used in a variety of applications that
include DisplayPort, XAUI, InfiniBand and other high-speed
data transmission applications.
The DS32EV400 is available in a 7 mm x 7 mm 48-pin lead-
less LLP package. Power is supplied from either a 2.5V or
3.3V supply.
Simplified Application Diagram
DisplayPort™ is a trademark of Video Electronics Standards Association (VESA).
© 2009 National Semiconductor Corporation
Equalizes up to 14 dB loss at 3.2 Gbps
8 levels of programmable equalization
Settable through control pins or SMBus interface
Operates up to 3.2 Gbps with 40” FR4 traces
0.12 UI residual deterministic jitter at 3.2 Gbps with 40”
FR4 traces
Single 2.5V or 3.3V power supply
Signal Detect for individual channels
Standby mode for individual channels
Supports AC or DC-Coupling with wide input common-
Low power consumption: 375 mW Typ at 2.5V
Small 7 mm x 7 mm 48-pin LLP package
9 kV HBM ESD Rating
-40 to 85°C operating temperature range
Other 8b10b Applications
October 19, 2009

DS32EV400SQ/NOPB Summary of contents

  • Page 1

    ... The DS32EV400 is available 48-pin lead- less LLP package. Power is supplied from either a 2.5V or 3.3V supply. Simplified Application Diagram DisplayPort™ trademark of Video Electronics Standards Association (VESA). © 2009 National Semiconductor Corporation DS32EV400 Features ■ Equalizes loss at 3.2 Gbps ■ ...

  • Page 2

    Pin Descriptions Pin Name Pin # I/O, Type HIGH SPEED DIFFERENTIAL I/O IN_0 CML IN_0– 2 IN_1 CML IN_1– 5 IN_2 CML IN_2– 9 IN_3 CML IN_3– 12 OUT_0 CML ...

  • Page 3

    Pin Name Pin # I/O, Type SERIAL MANAGEMENT BUS (SMBus) INTERFACE CONTROL PINS SDA 18 I/O, LVCMOS SDC 17 I, LVCMOS LVCMOS Other Reserv 19, 20 47,48 Note Input O = Output Connection Diagram Ordering ...

  • Page 4

    ... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( CMOS Input Voltage CMOS Output Voltage CML Input/Output Voltage Junction temperature Storage temperature Lead temperature (Soldering, 4 Seconds) Electrical Characteristics Over recommended operating supply and temperature ranges with default register settings unless other specified ...

  • Page 5

    Symbol Parameter CML RECEIVER INPUTS (IN_n+, IN_n-) V Source Transmit Launch Signal TX Level (IN diff) V Input Threshold Voltage INTRE V Supply Voltage of Transmitter to DDTX EQ V Input Common Mode Voltage ICMDC R Differential Input Return Loss ...

  • Page 6

    Symbol Parameter SIGNAL DETECT and ENABLE TIMING t Input OFF to ON detect — SD ZISD Output High Response Time t Input ON to OFF detect — SD IZSD Output Low Response Time t EN High to Output ON Response ...

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    Electrical Characteristics — Serial Management Bus Interface Over recommended operating supply and temperature ranges unless other specified. Symbol Parameter SERIAL BUS INTERFACE DC SPECIFICATIONS V Data, Clock Input Low Voltage IL V Data, Clock Input High Voltage IH I Current ...

  • Page 8

    System Management Bus (SMBus) and Configuration Registers The System Management Bus interface is compatible to SM- Bus 2.0 physical layer specification. The use of the Chip Select signal is required. Holding the CS pin High enables the SMBus port allowing ...

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    Name Address Default Type Bit 7 0x00 0x00 RO Status 0x01 0x00 RO Status Status 0x02 0x00 RO Enable/ 0x03 0x44 RW Boost ( Enable/ 0x04 0x44 RW Boost ( 0x05 0x00 RW Signal Detect 0x06 ...

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    FIGURE 1. Test Setup Diagram FIGURE 2. CML Output Transition Times FIGURE 3. Propagation Delay Timing Diagram FIGURE 4. Signal Detect (SD) Delay Timing Diagram 10 30031927 30031937 30031901 30031902 ...

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    FIGURE 5. Enable (EN) Delay Timing Diagram FIGURE 6. Simplified Receiver Input Termination Circuit FIGURE 7. SMBus Timing Parameters 11 30031903 30031907 www.national.com 30031906 ...

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    DS32EV400 Functional Descriptions The DS32EV400 is a programmable quad equalizer opti- mized for operation up to 3.2 Gbps for backplane and cable applications. EQUALIZER BOOST CONTROL Each data channel supports eight programmable levels of equalization boost. The state of the ...

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    SIGNAL DETECT The DS32EV400 features a signal detect circuit on each data channel. The status of the signal of each channel can be de- termined by either reading the Signal Detect bit (SDn) in the SMBus registers (see Table 1) ...

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    DS32EV400 Applications Information DisplayPort™ Application The DS32EV400 maybe used to extend the reach of the cable for DisplayPort applications. Typical DisplayPort cables are in the 6 meter range. With the DS32EV400 Equalizer, nominal cables may be doubled to 12 meters ...

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    Typical Performance Eye Diagrams and Curves Figure 8. Equalized Signal (40 In FR4, 1 Gbps, PRBS7, 0x07 Setting) Figure 10. Equalized Signal (40 In FR4, 3.2Gbps, PRBS7, 0x07 Setting) Figure 12. Equalized Signal (32 In Tyco XAUI Backplane, 3.125 Gbps, ...

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    Physical Dimensions 48-pin LLP Package ( 0.8 mm, 0.5 mm pitch) www.national.com inches (millimeters) unless otherwise noted Order Number DS32EV400SQ Package Number SQA48D 16 ...

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    Notes 17 www.national.com ...

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    ... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...