74HC423

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© NXP Semiconductors N.V. 2016. All rights reserved.

Product data sheet

Rev. 7 — 11 February 2016

4 of 19

NXP Semiconductors

74HC423

Dual retriggerable monostable multivibrator with reset

5.

Pinning information

5.1 Pinning

5.2 Pin description

(1) This is not a supply pin. The substrate is attached to this

pad using conductive die attach material. There is no

electrical or mechanical requirement to solder this pad.

However, if it is soldered, the solder land should remain

floating or be connected to VCC.

Fig 5.

Pin configuration SO16

Fig 6.

Pin configuration DHVQFN16

Table 2.

Pin description

Symbol

Pin

Description

1A, 2A

1, 9

trigger input (negative edge triggered)

1B, 2B

2, 10

trigger input (positive edge triggered)

1RD, 2RD

3, 11

direct reset (active LOW)

1Q, 2Q

4, 12

output (active LOW)

GND

8

ground (0 V)

1Q, 2Q

13, 5

output (active HIGH)

1CEXT, 2CEXT

14, 6

external capacitor connection

1REXT/CEXT, 2REXT/CEXT

15, 7

external resistor/capacitor connection

VCC

16

supply voltage