74HC423 Datasheet, PDF (5/23 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
6. Functional description
Table 3. Function table^[1]
Input
nRD
nA
nB
L
X
X
X
H
X
X
X
L
H
L
↑
H
↓
H
Output
nQ
nQ
L
H
L^[2]
H^[2]
L^[2]
H^[2]
[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 multivibrator was triggered before this condition was established, the pulse will continue as programmed.
7. Limiting values
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
I_IK
I_OK
I_O
I_CC
I_GND
T_stg
P_tot
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
V_I < −0.5 V or V_I > V_CC + 0.5 V
V_O < −0.5 V or V_O > V_CC + 0.5 V
−0.5 V < V_O < V_CC + 0.5 V
DIP16 package
SO16, SSOP16, TSSOP16 and
DHVQFN16 packages
−0.5
[1] _-
[1] _-
-
-
−50
−65
[2] _-
[3] _-
+7
V
±20
mA
±20
mA
±25
mA
50
mA
-
mA
+150 °C
750 mW
500 mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP16 packages: above 70 °C the value of P_tot derates linearly at 12 mW/K.
[3] For SO16 packages: above 70 °C the value of P_tot derates linearly at 8 mW/K;
For SSOP16 and TSSOP16 packages: above 60 °C the value of P_tot derates linearly at 5.5 mW/K;
For DHVQFN16 packages: above 60 °C the value of P_tot derates linearly at 4.5 mW/K.
74HC_HCT423_3
Product data sheet
Rev. 03 — 24 July 2008
© NXP B.V. 2008. All rights reserved.
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