74HC123D.653 Datasheet, PDF (4/25 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
1A 1
1B 2
1RD 3
1Q 4
2Q 5
2CEXT 6
2REXT/CEXT 7
GND 8
74HC123
74HCT123
16 V_CC
15 1REXT/CEXT
14 1CEXT
13 1Q
12 2Q
11 2RD
10 2B
9 2A
001aaa698
Fig 5. Pin configuration for DIP16, SO16, SSOP16
and TSSOP16
74HC123
terminal 1
index area
1B 2
1RD 3
1Q 4
2Q 5
2CEXT 6
2REXT/CEXT 7
V_CC(1)
15 1REXT/CEXT
14 1CEXT
13 1Q
12 2Q
11 2RD
10 2B
001aaf046
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as
supply pin or input.
Fig 6. Pin configuration for DHVQFN16
5.2 Pin description
Table 2. Pin description
Symbol
Pin
1A
1
1B
2
1RD
3
1Q
4
2Q
5
2CEXT
6
2REXT/CEXT
7
GND
8
2A
9
2B
10
2RD
11
2Q
12
1Q
13
1CEXT
14
1REXT/CEXT
15
V_CC
16
Description
negative-edge triggered input 1
positive-edge triggered input 1
direct reset LOW and positive-edge triggered input 1
active LOW output 1
active HIGH output 2
external capacitor connection 2
external resistor and capacitor connection 2
ground (0 V)
negative-edge triggered input 2
positive-edge triggered input 2
direct reset LOW and positive-edge triggered input 2
active LOW output 2
active HIGH output 1
external capacitor connection 1
external resistor and capacitor connection 1
supply voltage
74HC_HCT123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 16 December 2011
© NXP B.V. 2011. All rights reserved.
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