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M54HCT257 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. M54HCT257
Description  HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVERTING
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M54HCT257 Datasheet(HTML) 2 Page - STMicroelectronics

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INPUT AND OUTPUT EQUIVALENT CIRCUIT
CHIP CARRIER
NC = No Internal Connection
HCT257
HCT258
PIN DESCRIPTION (HCT257)
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 (HCT258)
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/M74HCT257/258
2/12


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