NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
14
15
1
2
1CEXT 14
2CEXT
6
3
CX
RCX
&
4
R
13
1REXT/CEXT
15
2REXT/CEXT
S
1 1A
9 2A
2 1B
10 2B
3 1RD
11 2RD
T
Q
1Q
4
2Q 12
11
mna515
7
6
CX
RCX
&
12
R
mna516
Q
1Q 13
2Q 5
7
9
10
5
RD
Fig 2.
Logic symbol
Fig 3.
IEC logic symbol
nREXT/CEXT
V
CC
nRD
R
CL
R
CL
nQ
nQ
V
CC
V
CC
R
CL
nA
CL
CL
nB
R
mna518
Fig 4.
74HC_HCT123
Logic diagram
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 16 December 2011
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