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參數(shù)資料
| 型號(hào)： | HC646 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS |
| 中文描述： | 八路總線(xiàn)收發(fā)器和寄存器具有三態(tài)輸出 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大?。?/td> | 91K |
| 代理商： | HC646 |
September 1993
3
Philips Semiconductors
Product specication
Octal bus transceiver/register; 3-state
74HC/HCT646
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
1CPAB
A to B clock input (LOW-to-HIGH, edge-triggered)
2SAB
select A to B source input
3
DIR
direction control input
4, 5, 6, 7, 8, 9, 10, 11
A0 to A7
A data inputs/outputs
12
GND
ground (0 V)
20, 19, 18, 17, 16, 15, 14, 13
B0 to B7
B data inputs/outputs
21
OE
output enable input (active LOW)
22
SBA
select B to A source input
23
CPBA
B to A clock input (LOW-to-HIGH, edge-triggered)
24
VCC
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
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