GS7025

Features:

• SMPTE 259M-C compliant (270Mb/s)
• automatic cable equalization (typically greater than 350m of high quality cable)
• 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)
• large IJT, typically 0.56UI beyond loop bandwidth
• robust lock detect




Application

Cable equalization plus clock and data recovery for all high speed serial digital interface applications involving SMPTE 259M-C.

Pinout






Specifications

PARAMETER	VALUE
Supply Voltage (VS) Input Voltage Range (any input) Operating Temperature Range Storage Temperature Range Lead Temperature (soldering, 10 sec)	5.5V VCC + 0.5 to VEE - 0.5V 0°C TA 70°C -65°C TS 150°C 260°C

Description


The GS7025 provides automatic cable equalization and high performance clock and data recovery for serial digital signals. The GS7025 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 35dB of gain at 135MHz which typically results in equalization of greater than 350m of high quality cable at 270Mb/s.

The GS7025 requires only one external resistor to set the VCO centre frequency and provides adjustment free operation.

The GS7025 has dedicated pins to indicate signal strength, carrier detect, and LOCK. Optional external resistors allow the carrier detect threshold level to be customized to the user's requirement. In addition, the GS7025 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 GS7025 operates from a single +5 or -5 volt supply.