DS125BR800 Datasheet, PDF (3/59 Pages) Texas Instruments – Low-Power 12.5-Gbps 8-Channel Repeater With Input Equalization and Output De-Emphasis

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DS125BR800
SNLS426E – AUGUST 2012 – REVISED JANUARY 2015
5 Description (Continued)
When operating in 10G-KR and PCIe Gen-3 mode, the DS125BR800 transparently allows the host controller and
the end point to optimize the full link and negotiate transmit equalizer coefficients. This seamless management of
the link training protocol ensures system-level interoperability with minimum latency. With a low power
consumption of 65 mW per channel (typ) and option to turn-off unused channels, the DS125BR800 enables
energy efficient system design. A single supply of 3.3 V or 2.5 V is required to power the device.
The programmable settings can be applied easily via pins, software (SMBus or I2C) or loaded through an
external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded
on power up, which eliminates the need for an external microprocessor or software driver.
6 Pin Configuration and Functions
DS125BR800
54-Pin
Top View
INB_0+ 1
INB_0- 2
INB_1+ 3
INB_1- 4
INB_2+ 5
INB_2- 6
INB_3+ 7
INB_3- 8
VDD 9
INA_0+ ¹⁰
INA_0- ¹¹
INA_1+ 12
INA_1- 13
VDD 14
INA_2+ 15
INA_2- 16
INA_3+ ¹⁷
INA_3- 18
SMBUS AND CONTROL
DAP = GND
45 OUTB_0+
44 OUTB_0-
43 OUTB_1+
42 OUTB_1-
41 VDD
40 OUTB_2+
39 OUTB_2-
38 OUTB_3+
37 OUTB_3-
36 VDD
35 OUTA_0+
34 OUTA_0-
33 OUTA_1+
32 OUTA_1-
31 OUTA_2+
30 OUTA_2-
29 OUTA_3+
28 OUTA_3-
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