74AHCT123AD,118 查看數據表（PDF） - NXP Semiconductors.
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74AHCT123AD,118 Datasheet PDF : 21 Pages
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NXP Semiconductors
74AHC123A; 74AHCT123A
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 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
VCC
supply voltage
VI
input voltage
IIK
input clamping current
IOK
output clamping current
IO
output current
VI < −0.5 V
VO < −0.5 V or VO > VCC + 0.5 V
VO = −0.5 V to (VCC + 0.5 V)
−0.5 +7.0 V
−0.5 +7.0 V
[1] −20
-
mA
[1] -
±20
mA
-
±25
mA
ICC
IGND
Tstg
Ptot
supply current
ground current
storage temperature
total power dissipation
SO16 package
Tamb = −40 °C to +125 °C
-
75
mA
−75 -
mA
−65 +150 °C
[2] -
500 mW
TSSOP16 package
[3] -
500 mW
DHVQFN16 package
[4] -
500 mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] Ptot derates linearly with 8 mW/K above 70 °C.
[3] Ptot derates linearly with 5.5 mW/K above 60 °C.
[4] Ptot derates linearly with 4.5 mW/K above 60 °C.
74AHC_AHCT123A_2
Product data sheet
Rev. 02 — 18 January 2008
© NXP B.V. 2008. All rights reserved.
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