74221 데이터 시트보기 (PDF) - NXP Semiconductors.

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74221

Dual Monostable Multivibrators (with Schmitt Trigger Input)

NXP Semiconductors. 

Philips Semiconductors

Dual non-retriggerable monostable

multivibrator with reset

ORDERING INFORMATION

See “74HC/HCT/HCU/HCMOS Logic Package Information”.

PIN DESCRIPTION

PIN NO.

1, 9

2, 10

3, 11

4, 12

7

8

13, 5

14, 6

15

16

SYMBOL

1A, 2A

1B, 2B

1RD, 2RD

1Q, 2Q

2REXT/CEXT

GND

1Q, 2Q

1CEXT, 2CEXT

1REXT/CEXT

VCC

NAME AND FUNCTION

trigger inputs (negative-edge triggered)

trigger inputs (positive-edge triggered)

direct reset inputs (active LOW)

outputs (active LOW)

external resistor/capacitor connection

ground (0 V)

outputs (active HIGH)

external capacitor connection

external resistor/capacitor connection

positive supply voltage

Product specification

74HC/HCT221

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

December 1990

3

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