GS2989
Dual-Slew-Rate, Dual-Output Cable
Driver with 3Gb/s Capability
Features
Description
The GS2989 is a high-speed BiCMOS integrated circuit
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SMPTE 424M, SMPTE 292M, and SMPTE 259M
designed to drive one to four 75Ω coaxial cables.
compliant
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Supports DVB-ASI at 270Mb/s
Supports data rates from 270Mb/s to 2.97Gb/s
Wide common-mode range input buffer
The GS2989 may drive data rates up to 2.97Gb/s and
provides two selectable slew rates in order to achieve
compliance to SMPTE 424M, SMPTE 292M, and SMPTE
259M.
100mV sensitivity
The GS2989 accepts industry-standard differential input
levels including LVPECL and CML.
Supports DC-coupling to industry-standard
differential logic
Input trace equalization compensates for up to 10 inches of
FR4 trace loss while in HD and 3G modes. This feature can
be disabled using the EQ_EN pin.
On-chip 100Ω differential data input termination
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Input signal trace equalization
The DISABLE1 and DISABLE2 pins power-down the first and
second output drivers respectively, leaving the serial data
outputs in a high-impedance state. When applied
simultaneously, the entire device is powered-down.
Dual differential coaxial-cable-driving outputs
Selectable slew rates
Adjustable output swing from 500mV to
pp
1800mV
pp
The GS2989 features adjustable output swing using an
external bias resistor. The single-ended output swing is
Independent DISABLE controls for each output
adjustable from 500mV to 1800mV
.
pp
pp
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Robust output signal presence function
Excellent output eye quality
An output signal presence function, the OSP pin, indicates
whether an active signal is present at the output of the
GS2989.
Power supply operation at 3.3V or 2.5V
135mW power consumption (2.5V supply)
Operating temperature range: -40°C to +85°C
Small footprint QFN package (4mm x 4mm)
The GS2989 can be powered from either a 3.3V or a 2.5V
supply. Power consumption is typically 135mW using a
2.5V power supply with one output enabled.
The GS2989 is Pb-free, and the encapsulation compound
does not contain halogenated flame retardant.
New dual-output pin out
Use the GS2988 for a single-output variant that is
drop-in compatible to the GS2978
This component and all homogeneous subcomponents are
RoHS compliant.
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Pb-free and RoHS compliant
Applications
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SMPTE 424M, SMPTE 292M, and SMPTE 259M coaxial
cable serial digital interfaces
GS2989
Final Data Sheet
1 of 20
Semtech
www.semtech.com
Rev.6
GENDOC-052133 July 2015