DS8921ATMNOPB - NATIONAL SEMICONDUCTOR

DS80PCI800

PRODUCT BRIEF

January 24, 2012

2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express

Repeater with Equalization and De-Emphasis

General Description

The DS80PCI800 is a low power, 8 channel repeater with 4-

stage input equalization, and output de-emphasis driver to

enhance the reach of PCI express serial links in board-to-

board or cable interconnects. Ideal for higher density x8 and

x16 PCI express configurations, the DS80PCI800 automati-

cally detects and adapts to Gen-1, Gen-2 and Gen-3 data

rates for easy system upgrade.

Each channel supports seamless detection and management

of the new Gen-3 transmit equalizer coefficients (FIR tap)

handshake protocol and PCIe control signals such as transmit

idle, beacon etc. without external system intervention. An au-

tomatic receive detection circuitry controls the input termina-

tion impedance based upon endpoint insertion (hot-plug

events). These features guarantee PCIe interoperability at

both the electrical and system level, while reducing design

complexity.

offers programmable transmit de-emphasis (up to 12 dB),

transmit VOD (up to 1300 mVp-p) and receive equalization

(up to 36 dB) to enable longer distance transmission in lossy

copper cables (10m+), or backplanes (40”+) with multiple

connectors. The receiver is capable of opening an input eye

that is completely closed due to inter-symbol interference (ISI)

introduced by the interconnect medium.

The programmable settings can be applied easily via pins,

software (SMBus/I2C) or loaded via an external EEPROM.

When operating in the EEPROM mode, the configuration in-

formation is automatically loaded on power up, which elimi-

nates the need for an external microprocessor or software

driver.

With a low power consumption and control to turn-off unused

channels, the DS80PCI800 is part of PowerWise family of

energy efficient devices.

Notice: This document is not a full datasheet. For more

information regarding this product or to order samples

please contact your local Texas Instruments sales office

or visit http://www.ti.com

Features

■Comprehensive family, proven system inter-operability

DS80PCI102 : x1 PCIe Gen-1/2/3

DS80PCI402 : x4 PCIe Gen-1/2/3

DS80PCI800 : x8/x16 PCIe Gen-1/2/3

■Automatic rate detect and adaptation to Gen-1/2/3 speeds

■Seamless support for Gen-3 transmit FIR handshake

■Rate adaptive receive EQ (up to 36 dB), transmit de-

emphasis (up to 12 dB) only Gen-1/2

■Adjustable Transmit VOD: 0.8 to 1.3 Vp-p (pin mode)

■0.2 UI of residual deterministic jitter at 8 Gbps after 40” of

FR4 or 10m 30awg PCIe Cable

■Low power dissipation with ability to turnoff unused

channels: 65 mW/channel

■Automatic receiver detect (hot-plug)

■Multiple configuration modes: Pins/SMbus/Direct-

EEPROM load

■Flow-thru pinout: 54-pin LLP (10 mm x 5.5 mm, 0.5 mm

pitch)

■Single supply voltage: 2.5V or 3.3V (selectable)

■3 kV HBM ESD rating

■−40 to 85°C operating temperature range

Typical Application

30133380

DS80PCI800 PRODUCT BRIEF 2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express Repeater

with Equalization and De-Emphasis

Physical Dimensions inches (millimeters) unless otherwise noted

Order Number DS80PCI800SQ (Tape and Reel 2,000 units)

Order Number DS80PCI800SQE (Tape and Reel 250 units)

Package Number SQA54A

www.ti.com 2

DS80PCI800

Notes

3 www.ti.com

DS80PCI800

Notes

DS80PCI800 PRODUCT BRIEF 2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express Repeater

with Equalization and De-Emphasis

www.ti.com

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