74HC123 Datasheet, PDF (5/24 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

NXP Semiconductors
74HC123; 74HCT123
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
↑
L
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 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
DIP16 package
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
except for pins nREXT/CEXT;
V_O = −0.5 V to (V_CC + 0.5 V)
−0.5 +7
V
-
±20
mA
-
±20
mA
-
±25
mA
-
50
mA
-
−50
mA
−65 +150 °C
[1] _-
750 mW
SO16 package
[2] _-
500 mW
SSOP16 package
[3] _-
500 mW
TSSOP16 package
[3] _-
500 mW
DHVQFN16 package
[4] _-
500 mW
[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.
74HC_HCT123_5
Product data sheet
Rev. 05 — 13 July 2009
© NXP B.V. 2009. All rights reserved.
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