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ORDERING INFORMATION
Part Number Package Type Temperature Range
GS9008 - CKA 8 Pin SOIC 0
°
to 70
°
C
DEVICE DESCRIPTION
The
GENLINX
GS9008 is a bipolar integrated circuit
designed to drive two 75
co-axial cables at data rates
exceeding 400 Mb/s. It directly interfaces with other
GENLINX
devices and can also be used as a general
purpose high speed cable driver.
While there are no plans to discontinue the GS9008, Gennum
has developed a successor product with improved features
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.
GENLINX
GS9008 Cable Driver
with Two Adjustable Outputs
DATA SHEET
Revision Date: April 1998
FUNCTIONAL BLOCK DIAGRAM
OUTPUT 1
OUTPUT 1
GS9008
INPUT
V
SET
INPUT BUFFER
&
DC RESTORE
V
REF
INPUT
GAIN
CONTROL
V
CC
(GND)
GND (V
EE
)
BAND-GAP
REFERENCE
OUTPUT
DRIVER
FEATURES
two outputs, adjustable from 0 to 1100 mVp-p into
75
loads
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
GENLINX
GS9002, GS9004A,
GS9005A and GS9015A
APPLICATIONS
SMPTE 259M Serial Digital Systems (4:2:2 & 4sc)
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