GS1508-CTA ETC, GS1508-CTA Datasheet

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GS1508-CTA

Manufacturer Part Number
GS1508-CTA
Description
HDTV Cable Driver
Manufacturer
ETC
Datasheet
Revision Date: March 2000
FEATURES
• SMPTE 292M compliant
• dual cable driving outputs optimized for driving data
• ±7% tolerance output
• >17dB output return loss
• minimum external components
• seamless interface with the HD-LINX™ family of
• low power
• standard packaging
APPLICATIONS
1.485Gb/s HDTV Serial Digital Receiver Interfaces for:
Routers, Distribution Amplifiers, Switchers, and other
transmitting equipment.
up to 1.485Gb/s
products
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
SDI
SDI
Tel. +1 (905) 632-2996
PATENT PENDING
DIFFERENTIAL
BANDGAP REFERENCE AND BIASING CIRCUIT
INPUT
PAIR
Fax. +1 (905) 632-5946
BLOCK DIAGRAM
www.gennum.com
DESCRIPTION
The GS1508 is a first generation very high speed bipolar
integrated circuit designed to drive two 75
cables. The GS1508 is a SMPTE 292M compliant cable
driver that directly interfaces with other Gennum HDTV
devices and can also be used as a general purpose high
speed cable driver.
The GS1508 features two complementary outputs whose
amplitude is controlled within a precise ±7% variation. The
output amplitude can be varied by adjusting the R
resistor value.
The serial inputs can be AC coupled. The GS1508 is a low
power device that does not require external pull down
resistors. The GS1508 is packaged in an 8 pin SOIC and
operates from a single 5V power supply.
ORDERING INFORMATION
GS1508-CKA
GS1508-CTA
PART NUMBER
OUTPUT STAGE &
CONTROL
E-mail: info@gennum.com
8 pin Tape and Reel
HD-LINX
8 pin SOIC
PACKAGE
HDTV Cable Driver
SDO
R
SDO
SET
PRELIMINARY DATA SHEET
Document No. 522 - 02 - 03
TEMPERATURE
GS1508
0°C to 70°C
0°C to 70°C
co-axial
SET

Related parts for GS1508-CTA

GS1508-CTA Summary of contents

Page 1

... The serial inputs can be AC coupled. The GS1508 is a low power device that does not require external pull down resistors. The GS1508 is packaged pin SOIC and operates from a single 5V power supply. ORDERING INFORMATION PART NUMBER GS1508-CKA GS1508-CTA BANDGAP REFERENCE AND BIASING CIRCUIT INPUT OUTPUT STAGE & DIFFERENTIAL CONTROL PAIR BLOCK DIAGRAM Fax ...

Page 2

ABSOLUTE MAXIMUM RATINGS T = 25°C unless otherwise indicated A PARAMETER Supply Voltage Input Voltage Range (any input) Operating Temperature Range Storage Temperature Power Dissipation Lead Temperature (soldering, 10 sec) Input ESD Voltage DC ELECTRICAL CHARACTERISTICS V = 5V, T ...

Page 3

... PIN CONNECTIONS 1 8 SDI 2 7 SDI GS1508 TOP VIEW SET PIN DESCRIPTIONS NUMBER SYMBOL 1, 2 SDI, SDI SET GND 7, 8 SDO, SDO INPUT / OUTPUT CIRCUITS SDI 20k Fig. 1 (Pins 1 and 2) SDO SDO GND ...

Page 4

... The SMPTE 292M standard requires that the output of a cable driver have a source impedance of 75 loss of at least 15dB between 5Mhz and 1.485GHz. In order for an HD SDI output circuit using the GS1508 to meet this specification, the output circuit shown in the Typical Application Circuit is recommended. ...

Page 5

... GS1508 Fig. 5 Static Protection Diodes OUTPUT RETURN LOSS MEASUREMENT To perform a practical return loss measurement necessary to force the GS1508 output high or low condition. The actual measured return loss will be based on the outputs being static operating conditions the outputs of the GS1508 swing between V -0 ...

Page 6

... Special attention must be paid to component layout when designing serial digital interfaces for HDTV. Figures 8 through 11 show the artwork for a four layer printed circuit evaluation board for the GS1508. The schematic is shown in Figure 7. An FR-4 dielectric can be used, however, controlled impedance transmission lines are required for PCB traces longer than approximately 1cm ...

Page 7

... EDGEMNT_BNC C13 J6 1µ EDGEMNT_BNC R11 53.6 All resistors in ohms, all capacitors in farads, unless otherwise shown. Fig. 7 Schematic Diagram for the GS1508 Evaluation Board Fig. 8 Top Layer of EB1508 PCB Layout Fig. 9 Power Layer of EB1508 PCB Layout V CC 1µ TP1 C1 C2 100n C3 ...

Page 8

PACKAGE DIMENSIONS 0.60 MAX CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION DOCUMENT IDENTIFICATION PRELIMINARY DATA SHEET This product is in production. Gennum reserves the right to make changes to the product and ...

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