Datasheet

74HC_HCT123 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 9 — 19 January 2015 5 of 25
NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care;  = LOW-to-HIGH transition;  = HIGH-to-LOW transition;
= one HIGH level output pulse; = one LOW level output pulse.
[2] If the monostable was triggered before this condition was established, the pulse will continue as programmed.
7. Limiting values
[1] For DIP16 package: P
tot
derates linearly with 12 mW/K above 70 C.
[2] For SO16 package: P
tot
derates linearly with 8 mW/K above 70 C.
[3] For SSOP16 and TSSOP16 packages: P
tot
derates linearly with 5.5 mW/K above 60 C.
[4] For DHVQFN16 package: P
tot
derates linearly with 4.5 mW/K above 60 C.
Table 3. Function table
[1]
Input Output
nRD nA nB nQ nQ
LXXLH
XHXL
[2]
H
[2]
XXLL
[2]
H
[2]
HL 
H  H
 LH
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage 0.5 +7 V
I
IK
input clamping current V
I
< 0.5 V or V
I
>V
CC
+ 0.5 V - 20 mA
I
OK
output clamping current V
O
< 0.5 V or V
O
> V
CC
+ 0.5 V - 20 mA
I
O
output current except for pins nREXT/CEXT;
V
O
= 0.5 V to (V
CC
+0.5V)
- 25 mA
I
CC
supply current - 50 mA
I
GND
ground current - 50 mA
T
stg
storage temperature 65 +150 C
P
tot
total power dissipation
DIP16 package
[1]
- 750 mW
SO16 package
[2]
- 500 mW
SSOP16 package
[3]
- 500 mW
TSSOP16 package
[3]
- 500 mW
DHVQFN16 package
[4]
- 500 mW