Datasheet

September 1993 7
Philips Semiconductors Product specification
Dual retriggerable precision monostable
multivibrator
74HC/HCT4538
NON-STANDARD DC CHARACTERISTICS FOR 74HC
Voltages are referenced to GND (ground = 0 V)
Note
1. This measurement can only be carried out after a trigger pulse is applied.
t
rt
retrigger time
nA
0
,nA
1
−
−
−
455+X
80+X
55+X
−
−
−
−
−
−
ns 2.0
4.5
6.0
Fig.8
X=C
EXT
/
(4.5 × V
CC
)
R
EXT
external timing
resistor
10
2
1000
1000
kΩ 2.0
5.0
C
EXT
external timing
capacitor
no limits
pF 5.0
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
V
I
(V)
OTHER
+25 −40 to +85 −40 to +125
min. typ max. min. max. min. max.
±I
I
input leakage current
nRC
EXT
0.5 5.0 10.0 µA 6.0 2.0
or
GND
V
CC
or GND;
note 1
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
OTHER+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.