OUT+

OUT-

50:

50:

CML3.3V or CML2.5V

Driver

100: Differential T-Line

DS10BR254

Receiver

IN+

IN-

100:

OUT+

OUT-

DS10BR254

Receiver

IN+

IN-

100: Differential T-Line

100:

LVDS

Driver

DS10BR254

SNLS260D – DECEMBER 2007 – REVISED APRIL 2013

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FUNCTIONAL DESCRIPTION

The DS10BR254 is a 1.5 Gbps 1:4 LVDS repeater optimized for high-speed signal routing and distribution over

lossy FR-4 printed circuit board backplanes and balanced cables.

Table 1. Input Select Truth Table

CONTROL Pin (SEL_in) State

Input Selected

0

IN1

1

IN2

Input Interfacing

The DS10BR254 accepts differential signals and allows simple AC or DC coupling. With a wide common mode

range, the DS10BR254 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

DS10BR254 inputs are internally terminated with a 100

Ω resistor.

Figure 2. Typical LVDS Driver DC-Coupled Interface to an DS10BR254 Input

Figure 3. Typical CML Driver DC-Coupled Interface to an DS10BR254 Input

8

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