74HC4538DB 查看數據表（PDF） - Philips Electronics
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74HC4538DB Datasheet PDF : 14 Pages
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Philips Semiconductors
Dual retriggerable precision monostable
multivibrator
Product specification
74HC/HCT4538
SYMBOL PARAMETER
trt
REXT
CEXT
retrigger time
nA0, nA1
external timing
resistor
external timing
capacitor
Tamb (°C)
TEST CONDITIONS
74HC
+25
−40 to +85
−40 to +125
UNIT VCC
(V)
min. typ. max. min. max. min. max.
OTHER
− 455+X
−
−
ns 2.0 Fig.8
− 80+X
−
−
− 55+X
−
−
4.5 X = CEXT /
6.0 (4.5 × VCC)
10
1000
kΩ 2.0
2
1000
5.0
no limits
pF 5.0
NON-STANDARD DC CHARACTERISTICS FOR 74HC
Voltages are referenced to GND (ground = 0 V)
SYMBOL
PARAMETER
±II
input leakage current
nRCEXT
Tamb (°C)
TEST CONDITIONS
74HC
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
VI
(V)
min. typ max. min. max. min. max.
OTHER
0.5
5.0
10.0 µA 6.0 2.0 VCC or GND;
or note 1
GND
Note
1. This measurement can only be carried out after a trigger pulse is applied.
September 1993
7
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