Datasheet

January 1995 6
Philips Semiconductors Product specification
Dual precision monostable multivibrator
HEF4538B
MSI
AC CHARACTERISTICS
V
SS
=0V; T
amb
=25°C; C
L
= 50 pF; input transition times ≤ 20 ns
Note
1. The maximum permissible resistance R
t
, which holds the specified accuracy of t
WO
, depends on the leakage current
of the capacitor C
t
and the leakage of the HEF4538B.
V
DD
V
SYMBOL MIN. TYP. MAX.
Change in output O 5 ± 0,2 %
pulse width over 10 ∆t
WO
± 0,2 %
temperature (T
amb
)15 ±0,2 %
Change in output O
pulse width over ∆t
WO
± 1,5 %
V
DD
range 5 to 15 V
Pulse width variation 5 ± 1%
R
t
= 100 kΩ
C
t
= 2 nF to 10 µF
between circuits 10 ∆t
WO
± 1%
in same package 15 ± 1%
External timing
resistor R
t
5 −
(1)
kΩ
External timing
capacitor C
t
2000 − no limits pF
Input capacitance
(pin 2 or 14) C
IN
15 pF