M74HC237 데이터 시트보기 (PDF) - STMicroelectronics

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M74HC237

3 TO 8 LINE DECODER LATCH

STMicroelectronics 

M54/M74HC237

INPUT AND OUTPUT EQUIVALENT CIRCUIT

IEC LOGIC SYMBOLS

PIN DESCRIPTION

PIN No

1, 2, 3

4

5

6

15, 14, 13,

12, 11, 10, 9,

7

8

16

SYMBOL

A, B, C

GL

G2

G1

Y0 to Y7

GND

VCC

NAME AND FUNCTION

Data Inputs

Latch Enable Input

(Active LOW)

Data Enable Input

(Active LOW)

Data Enable Input

(Active HIGH)

Decoder Outputs

Ground (0V)

Positive Supply Voltage

TRUTH TABLE

INPUTS

ENABLE

SELECT

GL G2 G1 C B A

XXL XXX

XHXXXX

L LHL L L

L LHL LH

L LHLHL

L L HL HH

L L HH L L

L L HH LH

L L HHH L

L L HHHH

H L HX XX

X: Don’t Care

OUTPUS

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

L

H

OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L

2/11

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