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GS1679-INTE3 Datenblatt(PDF) 1 Page - Gennum Corporation

Teilenummer GS1679-INTE3
Bauteilbeschribung  Cable Driver with HD/SD Capability
Download  16 Pages
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Hersteller  GENNUM [Gennum Corporation]
Direct Link  http://www.gennum.com
Logo GENNUM - Gennum Corporation

GS1679-INTE3 Datenblatt(HTML) 1 Page - Gennum Corporation

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GS1679 Cable Driver with HD/SD Capability
1 of 16
GS1679 Cable Driver with HD/SD Capability
Data Sheet
54175 - 1
March 2011
www.gennum.com
The GS1679 is a high-speed BiCMOS integrated circuit designed to drive one to four 75Ω coaxial cables. The GS1679 can
drive data rates up to 1.485Gb/s, and provides two selectable slew rates in order to achieve compliance to SMPTE 292M,
SMPTE 259M and SMPTE 344M.
The GS1679 accepts industry-standard differential input levels, including LVPECL and CML. The DISABLE1 and DISABLE2
pins power-down the first and second output drivers respectively, leaving the serial data output in a high-impedance state.
The GS1679 features an adjustable output swing using an external bias resistor. The single-ended output swing is adjustable
from 600mVpp to 1200mVpp. The GS1679 can be powered from either a 3.3V or a 2.5V supply. Power consumption is
typically 110mW using a 2.5V power supply.
The GS1679 is forward footprint-compatible with Gennum's 3G GS2989, allowing for an easier migration of HD designs to
3G.
Key Features
• SMPTE 292M, SMPTE 259M and SMPTE 344M
compliant
• Supports data rates from 270Mb/s to 1.485Gb/s
• Supports DVB-ASI at 270Mb/s
• Dual differential coaxial-cable-driving outputs
selectable slew rates
adjustable output swing from 600mVpp to
1200mVpp
DISABLE control
• Wide common-mode range input buffer
100mV sensitivity
Supports DC-coupling to industry-standard
differential logic
on-chip 100Ω differential data input termination
• Excellent output eye quality
• Power supply operation at 3.3V or 2.5V
• 110mW power consumption (2.5V supply)
• Operating temperature range: -40°C to +85°C
• Small footprint QFN package (4mm x 4mm)
• Pb-free and RoHS compliant
• Forward pin-compatible with Gennum's 3G GS2989
Typical Application Circuit
DDI
2
DDI
3
SDO1
12
SDO1
11
SDO2
10
SDO2
9
RSET
5
GS1679
VCC_Term
10n
GND
75R
4u7
4u7
4u7
4u7
75R
VCC_Term
VCC_Term
10n
75R
10n
GND
GND
4u7
4u7
75R
75R
75R
75R
75R
5n6*
5n6*
VCC
GND
VCC
10n
10n
GND
R*
* Typical value: varies with layout, and represents a trade-off
between good eye shape and output return loss.
5n6 is the optimum value for an 800mV output swing
and 3.3V operation.
4n7 is the optimum value for an 800mV output swing and
2.5V operation.
6n8 is the optimum value for an 1200mV output swing.
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise stated.
*Customer to choose resistor value.
5n6*
5n6*


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