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COM90C66 Datasheet(PDF) 7 Page - SMSC Corporation

Part # COM90C66
Description  ARCNET Controller/Transceiver with AT Interface and On-Chip RAM
PDF  76 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

COM90C66 Datasheet(HTML) 7 Page - SMSC Corporation

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DESCRIPTION OF PIN FUNCTIONS
PLCC
PIN NO.
NAME
SYMBOL
DESCRIPTION
33, 34
Crystal
Oscillator
XTAL1,
XTAL2
An external parallel resonant 20 MHz crystal should be
connected to these pins. If an external 20 MHz TTL clock
is used instead, it must be connected to XTAL1 with a
390
Ω pull-up resistor and XTAL2 should be left floating.
59
CA Clock
CACLK
Output. This is the start/stop CA clock and should be left
floating for typical operation.
58
Clock
CLK
Output.
This is a general purpose 5 MHz clock and
should be left floating for typical operation.
1, 43
Power Supply
Vcc
+5 Volt Power Supply pin.
21, 68
Ground
GND
Ground pins.
60-61
No Connect
NC
Make no connection to these pins.



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