GS2989 Datasheet, PDF (1/19 Pages) Gennum Corporation – Dual-Slew-Rate, Dual-Output Cable Driver with 3Gb/s Capability

GS2989 Dual-Slew-Rate, Dual-Output Cable Driver with 3Gb/s Capability
Features
• SMPTE 424M, SMPTE 292M and SMPTE 259M
compliant
• Supports DVB-ASI at 270Mb/s
• Supports data rates from 270Mb/s to 2.97Gb/s
• Wide common-mode range input buffer
Š 100mV sensitivity
Š supports DC-coupling to industry-standard
differential logic
Š on-chip 100Ω differential data input termination
• Input signal trace equalization
• Dual differential coaxial-cable-driving outputs
Š selectable slew rates
Š adjustable output swing from 500mVpp to
1800mVpp
Š independent DISABLE controls for each output
• Robust output signal presence function
• 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)
Š new dual-output pin out
Š use the GS2988 for a single-output variant that is
drop-in compatible to the GS2978
• Pb-free and RoHS compliant
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M coaxial
cable serial digital interfaces
Description
The GS2989 is a high-speed BiCMOS integrated circuit
designed to drive one to four 75Ω coaxial cables.
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.
The GS2989 accepts industry-standard differential input
levels including LVPECL and CML.
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.
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.
The GS2989 features adjustable output swing using an
external bias resistor. The single-ended output swing is
adjustable from 500mVpp to 1800mVpp.
An output signal presence function, the OSP pin, indicates
whether an active signal is present at the output of the
GS2989.
The GS2989 can be powered from either a 3.3V or a 2.5V
supply. Power consumption is typically 110mW 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.
This component and all homogeneous subcomponents are
RoHS compliant.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4
December 2010
www.gennum.com
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