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74HC423 Datasheet, PDF (4/23 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset | |||
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NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
74HC423
74HCT423
1A 1
1B 2
1RD 3
1Q 4
2Q 5
2CEXT 6
2REXT/CEXT 7
GND 8
74HC423
74HCT423
16 VCC
15 1REXT/CEXT
14 1CEXT
13 1Q
12 2Q
11 2RD
10 2B
9 2A
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terminal 1
index area
1B 2
1RD 3
1Q 4
2Q 5
2CEXT 6
2REXT/CEXT 7
VCC(1)
15 1REXT/CEXT
14 1CEXT
13 1Q
12 2Q
11 2RD
10 2B
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Transparent top view
Fig 5. Pin conï¬guration DIP16, SO16 and (T)SSOP16
(1) The die substrate is attached to this pad using a
conductive die attach material. It cannot be used as
supply pin or input
Fig 6. Pin conï¬guration DHVQFN16
5.2 Pin description
Table 2. Pin description
Symbol
1A, 2A
1B, 2B
1RD, 2RD
1Q, 2Q
GND
1Q, 2Q
1CEXT, 2CEXT
1REXT/CEXT, 2REXT/CEXT
VCC
Pin
1, 9
2, 10
3, 11
4, 12
8
13, 5
14, 6
15, 7
16
Description
trigger input (negative edge triggered)
trigger input (positive edge triggered)
direct reset (active LOW)
output (active LOW)
ground (0 V)
output (active HIGH)
external capacitor connection
external resistor/capacitor connection
supply voltage
74HC_HCT423_3
Product data sheet
Rev. 03 â 24 July 2008
© NXP B.V. 2008. All rights reserved.
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