The GS9025A provides automatic cable equalization and high performance clock and data recovery for serial digital signals. The GS9025A receives either single-ended or differential serial digital data and outputs differential clock and retimed data signals at PECL levels (800mV). The on-board cable equalizer provides up to 40dB of gain at 200MHz which typically results in equalization of greater than 350m of high quality cable at 270Mb/s.
The GS9025A operates in either auto or manual data rate selection mode. In both modes, the GS9025A requires only one external resistor to set the VCO centre frequency and provides adjustment free operation.
The GS9025A has dedicated pins to indicate signal strength/carrier detect, LOCK and data rate. Optional external resistors allow the carrier detect threshold level to be customized to the user's requirement. In addition, the GS9025A provides an 'Output Eye Monitor Test' (OEM_TEST) for diagnostic testing of signal integrity after equalization, prior to reslicing. The serial clock outputs can also be disabled to reduce power. The GS9025A operates from a single +5 or -5 volt supply.
SMPTE 259M compliant
operational to 540Mb/s
automatic cable equalization
(typically greater than 350m of
high quality cable at 270Mb/s)
adjustment-free operation
auto-rate selection (5 rates) with manual override
single external VCO resistor for operation with five input data rates
data rate indication output
serial data outputs muted and serial clock remains active when input data is lost
operation independent of SAV/EAV sync signals
signal strength indicator output
carrier detect with programmable threshold level
power savings mode (output serial clock disable)
Cable equalization plus clock and data recovery for all high speed serial digital interface applications involving SMPTE 259M and other data standards.
