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74HCT123DB Arkusz danych(PDF) 8 Page - NXP Semiconductors

Numer części 74HCT123DB
Szczegółowy opis  Dual retriggerable monostable multivibrator with reset
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Producent  PHILIPS [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT123DB Arkusz danych(HTML) 8 Page - NXP Semiconductors

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1998 Jul 08
8
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL =50pF
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
propagation delay
nRD, nA, nB to nQ
30
51
64
77
ns
4.5
CEXT = 0 pF;
REXT =5kΩ
tPLH
propagation delay
nRD, nA, nB to nQ
28
51
64
77
ns
4.5
CEXT = 0 pF;
REXT =5kΩ
tPHL
propagation delay
nRD to nQ (reset)
27
46
58
69
ns
4.5
CEXT = 0 pF;
REXT =5kΩ
tPLH
propagation delay
nRD to nQ (reset)
23
46
58
69
ns
4.5
CEXT = 0 pF;
REXT =5kΩ
tTHL / tTLH output transition time
7
15
19
22
ns
4.5
tW
trigger pulse width
nA = LOW
20
3
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 =10kΩ;
Figs 7 and 8
tW
output pulse width
nQ = HIGH
nQ = LOW
75
−−
ns
5.0
CEXT = 0 pF;
REXT =5kΩ;
note 1; Figs 7 and 8
trt
retrigger time
nA, nB
110
−−
ns
5.0
CEXT = 0 pF;
REXT =5kΩ;
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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