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COM90C66 参数 Datasheet PDF下载

COM90C66图片预览
型号: COM90C66
PDF下载: 下载PDF文件 查看货源
内容描述: ARCNET控制器/收发器与AT接口和片内RAM [ARCNET Controller/Transceiver with AT Interface and On-Chip RAM]
分类和应用: 控制器
文件页数/大小: 76 页 / 251 K
品牌: SMSC [ SMSC CORPORATION ]
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DESCRIPTION OF PIN FUNCTIONS
PLCC
PIN NO.
33, 34
NAME
Crystal
Oscillator
SYMBOL
XTAL1,
XTAL2
DESCRIPTION
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
pull-up resistor and XTAL2 should be left floating.
Output. This is the start/stop CA clock and should be left
floating for typical operation.
Output. This is a general purpose 5 MHz clock and
should be left floating for typical operation.
+5 Volt Power Supply pin.
Ground pins.
Make no connection to these pins.
59
58
1, 43
21, 68
60-61
CA Clock
Clock
Power Supply
Ground
No Connect
CACLK
CLK
V
cc
GND
NC
7