GS2965 Datasheet, PDF (1/41 Pages) Gennum Corporation – Uses standard 27MHz crystal

GS2965
Multi-Rate SDI Reclocker with Equalization & De-emphasis
Features
• SMPTE 424M, SMPTE 292M and SMPTE 259M-C
compliant
• Supports DVB-ASI at 270Mb/s
• Single supply operation at 3.3V or 2.5V
• 180mW typical power consumption (213mW with
RCO enabled) at 2.5V
• Input signal equalization and output-signal
de-emphasis settings to compensate for board-trace
dielectric losses
• 2:1 input multiplexer patented technology
• Choice of dual reclocked data outputs or one reclocked
data output and one clock output
• Uses standard 27MHz crystal
• Differential inputs and outputs
Š support DC coupling to industry-standard
differential logic
Š on-chip 100Ω differential data input/output
termination
Š selectable 400mVppd or 800mVppd output swing
on each output
Š seamless interface to other Gennum products
• 4 wire SPI host interface for device configuration and
monitoring
• Standard logic control and status signal levels
• Auto and Manual modes for rate selection
• Standards indication in Auto mode
• Lock Detect Output
• Mute, Bypass and Autobypass functions
• SD/HD indication output to control GS2978 or GS2988
dual slew-rate cable drivers
• Operating temperature range: -40°C to +85°C
• 32 pin 5mm x 5mm QFN package
• Pb-free and RoHS compliant
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M-C
coaxial cable serial digital interfaces
Description
The GS2965 is a multi-rate serial digital reclocker designed
to automatically recover the embedded clock from a digital
video signal and retime the incoming video data. It will
recover the embedded clock signal and retime the data
from a SMPTE 424M, SMPTE 292M, or SMPTE 259M-C
compliant digital video signal.
A serial host interface provides the ability to configure and
monitor multiple GS2965 devices in a daisy-chain
configuration.
Adjustable input trace equalization (EQ) for up to 40” of FR4
trace losses, and adjustable output de-emphasis (DE) for up
to 20” of FR4 trace losses, can be configured via the host
interface.
The GS2965 can operate in either auto or manual rate
selection mode. In Auto mode, the device will
automatically detect and lock onto incoming SMPTE SDI
data signals at any supported rate. For single rate data
systems, the GS2965 can be configured to operate in
Manual mode. In both modes, the device requires only one
external crystal to set the VCO frequency when not locked
and provides adjustment free operation.
The GS2965 accepts industry-standard differential input
levels including LVPECL and CML. The differential data
and clock outputs feature selectable output swing via the
host interface, ensuring compatibility with most
industry-standard, terminated differential receivers.
The GS2965 features dual differential outputs. The second
output can be configured to emit either the recovered clock
signal or the re-timed video data. This output can also be
disabled to save power.
In systems which require passing of non-SMPTE data rates,
the GS2965 can be configured to either automatically or
manually enter a bypass mode in order to pass the signal
without reclocking.
The GS2965 is Pb-free, and the encapsulation compound
does not contain halogenated flame retardant. This
component and all homogeneous sub-components are
RoHS compliant.
GS2965 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
52462 - 4
July 2012
www.semtech.com
1 of 41
Proprietary & Confidential