74HCT4538DB 查看數據表（PDF） - Philips Electronics

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74HCT4538DB

Dual retriggerable precision monostable multivibrator

Philips Electronics 

Philips Semiconductors

Dual retriggerable precision monostable

multivibrator

PIN DESCRIPTION

PIN NO.

1, 15

2, 14

3, 13

4, 12

5, 11

6, 10

7, 9

8

16

SYMBOL

1CTC, 2CTC

1RCTC, 2RCTC

1RD, 2RD

1A1, 2A1

1A0, 2A0

1Q, 2Q

1Q, 2Q

GND

VCC

NAME AND FUNCTION

external capacitor connections

external resistor/capacitor connections

direct reset inputs (active LOW)

trigger inputs (LOW-to-HIGH, edge-triggered)

trigger inputs (HIGH-to-LOW, edge-triggered)

pulse outputs

complementary pulse outputs

ground (0 V)

positive supply voltage

Product specification

74HC/HCT4538

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

September 1993

3

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