CLC005

ITU-T G.703 Cable Driver with Adjustable Outputs

General Description

National’s Comlinear CLC005 is a monolithic, high-speed

cable driver designed for the ITU-T G.703 serial digital data

transmission standard. The CLC005 drives 75

Ω transmis-

sion lines (Belden 8281 or equivalent) at data rates from DC

to over 622 Mbps. Output signal waveforms produced by the

CLC005 comply with G.703 specifications. Controlled output

rise and fall times (650 ps typical) minimize transition-

induced jitter. The output voltage swing, typically 2.0V, set by

an accurate, low-drift internal bandgap reference, delivers a

1.0V swing to back-matched and terminated 75

Ω cable. Out-

put swing is adjustable from 0.7 V

nal resistors.

The CLC005’s class AB output stage consumes less power

than other designs, 185 mW with both outputs terminated,

and requires no external bias resistors. The differential in-

puts accept a wide range of digital signals from 200 mV

G.703 levels within the specified common-mode limits. All

this make the CLC005 an excellent general purpose high

speed driver for digital applications.

The CLC005 is powered from a single +5V or −5.2V supply

and comes in an 8-pin SOIC package.

Key Specifications

n 650 ps rise and fall times

n Data rates to 622 Mbps

n 200 mV differential input

Features

n No external pull-down resistors

n Adjustable output amplitude

n Differential input and output

n Low power dissipation

n Single +5V or −5.2V supply

Applications

n ITU-T G.703, Sonet/SDH, and ATM compatible driver

n Digital routers and distribution amplifiers

n Coaxial cable driver for digital transmission line

n Twisted pair driver

n Buffer applications

Typical Application

DS100144-2

August 1998

© 1998 National Semiconductor Corporation

DS100144

www.national.com