Datasheet

January 1995 5
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
V
DD
V
SYMBOL MIN. TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
I
0
, I
1
→ O 5 200 460 ns 173 ns + (0,55 ns/pF) C
L
HIGH to LOW 10 t
PHL
90 180 ns 79 ns + (0,23 ns/pF) C
L
15 60 120 ns 52 ns + (0,16 ns/pF) C
L
I
0
, I
1
→ O 5 220 440 ns 193 ns + (0,55 ns/pF) C
L
LOW to HIGH 10 t
PLH
85 190 ns 74 ns + (0,23 ns/pF) C
L
15 60 120 ns 52 ns + (0,16 ns/pF) C
L
C
D
→ O 5 125 250 ns 98 ns + (0,55 ns/pF) C
L
HIGH to LOW 10 t
PHL
55 110 ns 44 ns + (0,23 ns/pF) C
L
15 40 80 ns 32 ns + (0,16 ns/pF) C
L
C
D
→ O 5 125 250 ns 98 ns + (0,55 ns/pF) C
L
LOW to HIGH 10 t
PLH
55 110 ns 44 ns + (0,23 ns/pF) C
L
15 40 80 ns 32 ns + (0,16 ns/pF) C
L
Recovery times 5 20 40 ns
C
D
→ I
0
,I
1
10 t
RCD
10 20 ns
15 5 10 ns
Retrigger times 5 0 ns
O,
O → I
0
,I
1
10 t
RO
0ns
15 0 ns
Minimum I
0
59045ns
pulse width; LOW 10 t
WI0L
30 15 ns
15 24 12 ns
Minimum I
1
55025ns
pulse width; HIGH 10 t
WI1H
24 12 ns
15 20 10 ns
Minimum C
D
55525ns
pulse width; LOW 10 t
WCDL
25 12 ns
15 20 10 ns
Output O or
O 5 218 230 242 µs
R
t
= 100 kΩ
C
t
= 0,002 µF
pulse width 10 t
WO
213 224 235 µs
15 211 223 234 µs
Output O or O 5 10,3 10,8 11,3 ms
R
t
= 100 kΩ
C
t
= 0,1 µF
pulse width 10 t
WO
10,2 10,7 11,2 ms
15 10,1 10,6 11,1 ms
Output O or O 5 1,01 1,09 1,11 s
R
t
= 100 kΩ
C
t
=10µF
pulse width 10 t
WO
0,99 1,04 1,09 s
15 0,99 1,04 1,09 s