M74HC155C1R 查看數據表（PDF） - STMicroelectronics

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M74HC155C1R

DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER

STMicroelectronics 

M54/M74HC155

INPUT AND OUTPUT EQUIVALENT CIRCUIT IEC LOGIC SYMBOL

PIN DESCRIPTION

PIN No SYMBOL

1, 15

1C, 2C

2, 14

1G, 2G

3, 13

B, A

7, 6, 5, 4 1Y0 to 1Y3

9, 10, 11, 12 2Y0 to 2Y3

8

GND

16

VCC

NAME AND FUNCTION

Data Inputs

Strobe Inputs

Common Data Inputs

Outputs

Outputs

Ground (0V)

Positive Supply Voltage

TRUTH TABLE

INPUTS

OUTPUTS

B A 1G 1C 1Y0 1Y1 1Y2 1Y3

XXHXHHHH

L

L

L

H

L

H

H

H

LHLHH LHH

H

L

L

HHH

L

H

HH L HHHHL

X X X L HHHH

TRUTH TABLE

INPUTS

OUTPUTS

B A 2G 2C 2Y0 2Y1 2Y2 2Y3

X XHXHHHH

L

L

L

L

L

HHH

L

HL

LH

L

HH

H

L

L

LH

H

L

H

HHL

LH

HH

L

X XXHHHHH

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