ORDERING INFORMATION

Part Number

Package Type

Temperature Range

GS9008 - CKA

8 Pin SOIC

0

° to 70°C

DEVICE DESCRIPTION

The

designed to drive two 75

Ω co-axial cables at data rates

exceeding 400 Mb/s.

It directly interfaces with other

purpose high speed cable driver.

While there are no plans to discontinue the GS9008, Gennum

has developed a successor product with improved features

and performance called the GS9028.

The GS9028 is

recommended for new designs.

The differential inputs are AC-coupled and internally DC-

restored which allows correct passage of pathological

check codes associated with the serial digital standards.

Even though the inputs are AC coupled, static protection

diodes at each input restrict the DC differential so that if the

driving source uses the opposite polarity power supply,

external DC blocking capacitors must be used.

Correctly terminated output signal levels are adjustable

from as low as 0 mV to as high as 1100 mV with little change

in other performance parameters. Performance is guaranteed

for output levels between 600 mV and 1000 mV. The gain

of the output stages is varied by adjusting the V

SET

voltage

with respect to an internal band gap reference voltage

V

REF

.

The GS9008 is packaged in an 8 pin SOIC, and operates

from a single +5 or -5 volt supply consuming typically only

170 mW of power.

with Two Adjustable Outputs

DATA SHEET

Revision Date: April 1998

FUNCTIONAL BLOCK DIAGRAM

OUTPUT 1

OUTPUT 1

GS9008

INPUT

INPUT BUFFER

&

DC RESTORE

INPUT

GAIN

CONTROL

BAND-GAP

REFERENCE

OUTPUT

DRIVER

FEATURES

• two outputs, adjustable from 0 to 1100 mVp-p into

75

• nominal 600 ps rise and fall times

• accepts SMPTE and standard ECL input levels

• operates from a single +5 or -5 volt supply

• on-chip DC restoration for low jitter

• 170 mW power dissipation

• interfaces with

GS9005A and GS9015A

APPLICATIONS

• SMPTE 259M Serial Digital Systems (4:2:2 & 4ƒsc)

• Other Serial Digital Video Interfaces - 360 Mb/s

• General purpose high speed driver applications

INPUT

VSET

VEE

VREF

VCC

OUTPUT 1

OUTPUT 1

INPUT

8

1

4

3

6

5

7

2

GS9008

PIN CONNECTIONS

Patent No. 5,426,389.

Document No.

520 - 77 - 04

GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 fax. +1 (905) 632-5946

Web Site: www.gennum.com E-mail: info@gennum.com