SY10EL89_03 Datasheet, PDF (1/4 Pages) Micrel Semiconductor – COAXIAL CABLE DRIVER

COAXIAL
CABLE DRIVER
SY10EL89
FINAL
FEATURES
s 375ps propagation delay
s 1.6V output swings
s Internal 75KΩ input pull-down resistors
s Available in 8-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
Q0 1
Q0 2
Q1 3
Q1 4
8 VCC
7D
6D
5 VEE
SOIC
TOP VIEW
DESCRIPTION
The SY10EL89 is a differential fanout gate specifically
designed to drive coaxial cables. The device is especially
useful in Digital Video Broadcast applications. For this
application, since the system is polarity-free, each output
of the device can be used as an independent driver.
The driver boasts a voltage gain of approximately 40
and produces output swings twice as large as a standard
ECL output. When driving a coaxial cable, proper
termination is required at both ends of the line to minimize
signal loss. The 1.6V output swings allow for termination
at both ends of the cable while maintaining the required
800mV swing at the receiving end of the cable. Because
of the larger output swings, the device cannot be
terminated into the standard –2.0V. All of the DC
parameters are tested with a 50Ω to –3.0V load. The
driver accepts a standard differential ECL input and can
run off the Digital Video Broadcast standard –5.0V supply.
PIN NAMES
Pin
D
Q0, Q1
Function
Data Inputs
Data Outputs
Rev.: G Amendment: /0
1
Issue Date: February 2003