DS125BR820 Datasheet, PDF (13/62 Pages) Texas Instruments – Low-Power 12.5 Gbps 8-Channel Linear Repeater

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7 Detailed Description
DS125BR820
SNLS491B – JULY 2014 – REVISED FEBRUARY 2015
7.1 Overview
The DS125BR820 provides linear equalization for lossy printed circuit board backplanes and balanced cables.
The DS125BR820 operates in three modes: Pin Control Mode (ENSMB = 0), SMBus Slave Mode (ENSMB = 1)
and SMBus Master Mode (ENSMB = Float) to load register information from external EEPROM.
7.2 Functional Block Diagram
One channel of four A Channels
RXDET
Term
INA_n+
INA_n-
EN_SMB
EQA
VODA[1:0]
EQ
Pre-
driver
Driver
OUTA_n+
OUTA_n-
READ_EN
AD[3:0]
SCL
SDA
PWDN
VDD_SEL
VIN
RXDET
Digital Core and SMBus Registers
Internal voltage
regulator
Term
INB_n+
INB_n-
EN_SMB
EQB
VODB[1:0]
EQ
Pre-
driver
One channel of four B Channels
Driver
ALL_DONE
OUTB_n+
OUTB_n-
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