Datasheet

OUT+
OUT-
50:50:
V
CC
CML3.3V or CML2.5V
Driver
100: Differential T-Line
DS25BR204
Receiver
IN+
IN-
100:
OUT+
OUT-
DS25BR204
Receiver
IN+
IN-
100: Differential T-Line
100:
LVDS
Driver
DS25BR204
SNLS259D –NOVEMBER 2007–REVISED MARCH 2013 www.ti.com
The DS25BR204 has a pre-emphasis control pin for each output for switching the transmit pre-emphasis to ON
and OFF setting and an equalization control pin for each input for switching the receive equalization to ON and
OFF setting. The following are the transmit pre-emphasis and receive equalization truth tables.
Table 2. Transmit Pre-Emphasis Truth Table
(1)
OUTPUT OUTn, n = {0, 1, 2, 3}
CONTROL Pin (PEn) State Pre-emphasis Level
0 OFF
1 ON
(1) Transmit Pre-emphasis Level Selection for an Output OUTn
Table 3. Receive Equalization Truth Table
(1)
INPUT INn, n = {1, 2}
CONTROL Pin (EQn) State Equalization Level
0 OFF
1 ON
(1) Receive Equalization Level Selection for an Input INn
Input Interfacing
The DS25BR204 accepts differential signals and allows simple AC or DC coupling. With a wide common mode
range, the DS25BR204 can be DC-coupled with all common differential drivers (i.e. LVPECL, LVDS, CML). The
following three figures illustrate typical DC-coupled interface to common differential drivers. Note that the
DS25BR204 inputs are internally terminated with a 100Ω resistor.
Figure 10. Typical LVDS Driver DC-Coupled Interface to an DS25BR204 Input
Figure 11. Typical CML Driver DC-Coupled Interface to an DS25BR204 Input
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Product Folder Links: DS25BR204