74AHC_AHCT123A_Q100 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 1 — 23 May 2013 5 of 22
NXP Semiconductors 74AHC123A-Q100; 74AHCT123A-Q100
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 GND.
Fig 5. Pin configuration SO16, TSSOP16 Fig 6. Pin configuration DHVQFN16
$+&$4
$+&7$4
$ 9
&&
% 5(;7&(;7
5' &(;7
4 4
4 4
&(;7 5'
5(;7&(;7 %
*1' $
DDD
DDD
$+&7$4
%
&(;7 5'
4 4
4 4
5' &(;7
%
*1'
$
$
9
&&
WHUPLQDO
*1'
Table 2. Pin description
Symbol Pin Description
1A
1 negative-edge triggered input 1
1B 2 positive-edge triggered input 1
1R
D 3 direct reset LOW and positive-edge triggered input 1
1Q
4 active LOW output 1
2Q 5 active HIGH output 2
2CEXT 6 external capacitor connection 2
2REXT/CEXT 7 external resistor and capacitor connection 2
GND 8 ground (0 V)
2A
9 negative-edge triggered input 2
2B 10 positive-edge triggered input 2
2R
D 11 direct reset LOW and positive-edge triggered input 2
2Q
12 active LOW output 2
1Q 13 active HIGH output 1
1CEXT 14 external capacitor connection 1
1REXT/CEXT 15 external resistor and capacitor connection 1
V
CC
16 supply voltage
