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M54HC257 数据表(PDF) 2 Page - STMicroelectronics

部件名 M54HC257
功能描述  HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE
PDF  12 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M54HC257 数据表(HTML) 2 Page - STMicroelectronics

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INPUT AND OUTPUT EQUIVALENT CIRCUIT
CHIP CARRIER
NC = No Internal Connection
HC257
HC258
PIN DESCRIPTION (HC257)
PIN No
SYMBOL
NAME AND FUNCTION
1
SELECT
Common Data Select
Input
2, 5, 14, 11
1A to 4A
Data Input From Source A
3, 6, 13, 10
1B to 4B
Data Inputs from Source B
4, 7, 12, 9
1Y to 4Y
3 State Multiplexer
Outputs
15
OE
3 State Output Enable
Inputs (Active LOW)
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
PIN DESCRIPTION (HC258)
PIN No
SYMBOL
NAME AND FUNCTION
1
SELECT
Common Data Select
Input
2, 5, 14, 11
1A to 4A
Data Input From Source A
3, 6, 13, 10
1B to 4B
Data Inputs from Source B
4, 7, 12, 9
1Y to 4Y
3 State Multiplexer
Outputs
15
OE
3 State Output Enable
Inputs (Active LOW)
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
M54/M74HC257/258
2/12



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