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74HC423D Folha de dados(PDF) 7 Page - NXP Semiconductors

Nome de Peças 74HC423D
Descrição Electrónicos  Dual retriggerable monostable multivibrator with reset
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Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC423D Folha de dados(HTML) 7 Page - NXP Semiconductors

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1998 Jul 08
7
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT423
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard (except for nREXT/CEXT)
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (
∆I
CC) for a unit load of 1 is given in the family specifications.
To determine
∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
INPUT
UNIT LOAD COEFFICIENT
nA, nB
0.35
nRD
0.50
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS/
NOTES
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min.
max.
tPHL/ tPLH
propagation delay
nA, nB to nQ, nQ
30
51
64
77
ns
4.5
CEXT = 0 pF;
REXT =5 kΩ
tPHL/ tPLH
propagation delay
nRD to nQ, nQ
26
48
60
72
ns
4.5
CEXT = 0 pF;
REXT =5 kΩ
tTHL/ tTLH
output transition time
7
15
19
22
ns
4.5
tW
trigger pulse width
nA = LOW
20
5
25
30
ns
4.5
Fig.7
tW
trigger pulse width
nB = HIGH
20
5
25
30
ns
4.5
Fig.7
tW
reset pulse width
nRD = LOW
20
7
25
30
ns
4.5
Fig.8
tW
output pulse width
nQ = HIGH
nQ = LOW
450
−−
µs
5.0
CEXT = 100 nF;
REXT = 10 kΩ;
Figs 7 and 8
tW
output pulse width
nQ = HIGH
nQ = LOW
75
−−
ns
5.0
CEXT = 0 pF;
REXT =5 kΩ;
note 1; Figs 7 and
8
trt
retrigger time
nA, nB
110
−−
ns
5.0
CEXT = 0 pF;
REXT =5 kΩ;
note 2; Fig.7
REXT
external timing resistor
2
1000
−−
k
5.0
Fig.9
CEXT
external timing
capacitor
no limits
pF
5.0
Fig.9; note 3


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