gs2986 Gennum Corporation, gs2986 Datasheet
gs2986
Manufacturer Part Number
gs2986
Description
Gs2986 Multi-rate Sdi Reclocker With Equalization & De-emphasis
Manufacturer
Gennum Corporation
Datasheet
1.GS2986.pdf
(3 pages)
GS2986 Multi-Rate SDI Reclocker with Equalization & De-emphasis
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GS2986 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Product Brief
50905 - B
SMPTE 424M, SMPTE 292M and SMPTE 259M-C compliant
Supports DVB-ASI at 270Mb/s
Auto and Manual modes for rate selection
Standards indication in Auto mode
4:1 input multiplexer patented technology
Choice of dual reclocked data outputs or one reclocked data
output and one clock output
Lock Detect Output
Mute, Bypass and Autobypass functions
SD/HD indication output to control GS2978 or GS2988 dual
slew-rate cable drivers
Uses standard 27MHz crystal
Cascadable crystal buffer supports multiple reclockers using
a single crystal
Differential inputs and outputs
Input signal equalization and output-signal de-emphasis
settings to compensate for board-trace dielectric losses
Standard logic control and status signal levels
4 wire SPI host interface for device configuration and
monitoring
Single supply operation at 3.3V or 2.5V
210mW typical power consumption (260mW with RCO
enabled) at 2.5V
Operating temperature range: -40°C to +85°C
Small footprint QFN package (6mm x 6mm)
Pb-free and RoHS compliant
SMPTE 424M, SMPTE 292M and SMPTE 259M-C coaxial
cable serial digital interfaces
support DC coupling to industry-standard differential
logic
on-chip 100Ω differential data input/output termination
selectable 400mVppd or 800mVppd output swing on
each output
seamless interface to other Gennum products
April 2009
www.gennum.com
Description
The GS2986 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 GS2986 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 GS2986 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 GS2986 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 GS2986 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 GS2986 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
GS2986 can be configured to either automatically or manually
enter a bypass mode in order to pass the signal without reclocking.
The GS2986 is Pb-free, and the encapsulation compound does not
contain halogenated flame retardant. This component and all
homogeneous sub-components are RoHS compliant.
Proprietary & Confidential
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gs2986 Summary of contents
Page 1
... 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 GS2986 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 ...
Page 2
... LOS SPI Detect LOS CP_CAP DDI0 DDI0 DDI1 DDI1 DDI2 DDI2 DDI3 RSVD DDI3 Ground Pad (bottom of package) GS2986 Multi-Rate SDI Reclocker with Equalization & De-emphasis Product Brief 50905 - B April 2009 CP_CAP LF+ LDO Retimer Charge VCO Pump Selectable Divide Control RST ...
Page 3
... All other trademarks mentioned are the properties of their respective owners. GENNUM and the Gennum logo are registered trademarks of Gennum Corporation. © Copyright 2008 Gennum Corporation. All rights reserved. www.gennum.com GS2986 Multi-Rate SDI Reclocker with Equalization & De-emphasis Product Brief 50905 - B April 2009 Changes and/or Modifications Updates ...