sy897132l Micrel Semiconductor, sy897132l Datasheet - Page 6

• Manufacturer Part Number: sy897132l
• Description: 1.5gbps Link Replicator For Fibre Channel, Gigabit Ethernet, Hdtv And Sata
• Manufacturer: Micrel Semiconductor

Detailed Description
Input Functionality
The inputs are typically AC-coupled and are
terminated internally to 1.2V. SY897132L can accept
AC-coupled and DC-coupled LVPECL, CML.
Outputs Termination
The SY897132L are capable of driving differential
transmission lines with either 50Ω or 75Ω impedance.
The outputs are designed to operate with or without
external termination resistors. However, differential
transmission lines should be terminated at the
destination to avoid reflections and noise. See Figure
3 for more details.
June 2009
6
OEx Output Enable
The Output Enable (OEx) pins on the SY897132L
provide an option to turn on/off OUT0 and/or OUT1. If
OEx is LOW, the entire output buffer is turned off and
both differential outputs float HIGH. This would
reduce overall I
disabled output pair.
Power Supply Bypass
The SY897132L uses separate 3.3V power supplies
for its core circuitry and output buffers. By separating
the power supplies, SY897132L minimizes the impact
of noise coupled onto the power supply by the various
switching outputs. Placing a 0.1µF bypass capacitor
on the VCC pins will provide additional noise isolation.
CC
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by approximately 26mA for each
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M9999-061509-A