FEATURES

• automatic cable equalization

• typically greater than 350 m of high quality cable at

270 Mb/s

• typically 300 m of high quality cable at 360 Mb/s

• improved jitter response vs cable length

• drop in replacement for GS9004B

• capability to drive 50

TT

)

• fully compatible with SMPTE 259M and operational to

400 Mb/s

• signal strength indicator

• output 'eye' monitor

• 14 pin SOIC packaging

• single +5 or -5 volt power supply operation

Serial Digital Cable Equalizer

FUNCTIONAL BLOCK DIAGRAM

GS9004C

IN+

AGC

CAPACITOR

SIGNAL

STRENGTH

INDICATOR

VOLTAGE

VARIABLE

FILTER

LOGIC

COMPARATOR

FILTER

CONTROL

PEAK

DETECTOR

DC

RESTORER

Σ

DATA

6

8

7

14

13

DATA

9

IN-

3 OUTPUT 'EYE'

MONITOR

DATA SHEET

DEVICE DESCRIPTION

The Gennum GS9004C is an improved monolithic automatic

cable equalizer developed for SMPTE/EBU scrambled

NRZI Serial Digital Video signals.

While there are no plans to discontinue the GS9004C,

Gennum has developed a successor product with improved

features and performance called the GS9024. The GS9024

is recommended for new designs.

This device features DC restoration to pass the Pathological

Test Signals and fully automatic equalization in order to

meet the SMPTE 259M Serial Interface Standard. The

DATA and DATA outputs typically deliver 800 mV (p-p)

equalized signals into 50

Ω loads (to V

TT

). These signals

can be used to feed cable driver circuits for Serial Distribution

Amplifier applications.

This device also incorporates an analog signal strength

indicator (SSI) which provides a 0.5 V to 0 V output relative

to V

to the signal.

The

GS9004C features an OUTPUT 'EYE' MONITOR

(OEM), which allows verification of signal integrity after

equalization, prior to reslicing. Operating with a single +5

or -5 volt supply, the GS9004C typically draws 52 mA of

current.

ORDERING INFORMATION

Part Number

Package Type

Temperature Range

GS9004CCKB

14 pin SOIC

0

GS9004CCTB

14 pin SOIC Tape

0

APPLICATIONS

• Front-end cable equalization for digital video systems

• Input equalization for serial digital distribution amplifiers,

routers, production switchers and other receiving

equipment

Document No. 521 - 72 - 00

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