874208I Data Sheet

LVDS CLOCK DIVIDER AND FANOUT BUFFER

REVISION A 9/18/14

11

©2014 Integrated Device Technology, Inc.

Applications Information

Differential Input with Built-In 50 Termination Interface

The IN /nIN with built-in 50

 terminations accept LVDS, LVPECL,

CML and other differential signals. Both differential signals must meet

the VIN and VIH input requirements. Figures 4A to 4C to show

interface examples for the IN/nIN input with built-in 50

 terminations

driven by the most common driver types. The input interfaces

suggested here are examples only. If the driver is from another

vendor, use their termination recommendation. Please consult with

the vendor of the driver component to confirm the driver termination

requirements.

Figure 4A: IN/nIN Input with Built-In 50

 driven by an

LVDS Driver

Figure 4B: IN/nIN Input with Built-In 50

 Driven by a CML

Driver with Open Collector

Figure 4C: IN/nIN Input with Built-In 50

 driven by an

LVPECL Driver

2.5V

LVDS

3.3V or 2.5V

50

Ω

50

Ω

IN

nIN

VT

Receiver

with Built-in

50

Ω

Zo = 50

Ω

Zo = 50

Ω

2.5V

2.5V

IN

nIN

VT

Receiver

with Built-in

50

Ω

Zo = 50

Ω

Zo = 50

Ω

50

Ω

50

Ω

CML – Open Collector

2.5V

LVPECL

2.5V

50

Ω

50

Ω

IN

nIN

VT

Receiver

w ith Built-in

50

Ω

Zo = 50

Ω

Zo = 50

Ω

R1

18

Ω