Datasheet

September 1993 10
Philips Semiconductors Product specification
Programmable delay timer with oscillator 74HC/HCT5555
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF.
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITION
+25 40 to +85 40 to +125
V
CC
(V)
WAVEFORMS
MIN TYP MAX MIN MAX MIN MAX
t
PLH
/t
PHL
propagation
delay A, B to
Q, Q
77
28
22
240
48
41
300
60
51
360
72
61
ns
ns
ns
2.0
4.5
6.0
Fig.6
t
PLH
/t
PHL
propagation
delay MR to Q,
Q
61
22
18
185
37
31
230
46
39
280
56
48
ns
ns
ns
2.0
4.5
6.0
Fig.7
t
PLH
/t
PHL
propagation
delay RS to Q,
Q
83
30
24
250
50
43
315
63
54
375
75
64
ns
ns
ns
2.0
4.5
6.0
Fig.8; note 1
t
THL
/t
TLH
output
transition time
19
7
6
75
15
13
95
19
16
110
22
19
ns
ns
ns
2.0
4.5
6.0
Fig.6
t
W
trigger pulse
width
A = HIGH
B = LOW
70
14
12
17
6
5
90
18
15
105
21
18
ns
ns
ns
2.0
4.5
6.0
Fig.6
t
W
master reset
pulse width
HIGH
70
14
12
19
7
6
90
18
15
105
21
18
ns
ns
ns
2.0
4.5
6.0
Fig.7
t
W
clock pulse
width RS;
HIGH or LOW
80
16
14
25
9
7
100
20
17
120
24
20
ns
ns
ns
2.0
4.5
6.0
Fig.8
t
W
minimum
output pulse
width
Q = HIGH,
Q = LOW
275
100
80
ns
ns
ns
2.0
4.5
6.0
Fig.6; note 1
t
rt
retrigger time
A, B
0
0
0
ns
ns
ns
2.0
4.5
6.0
Fig.10; note 2
R
EXT
external timing
resistor
5
1
1000
1000
k
k
2.0
5.0
Fig.13
C
EXT
external timing
capacitor
50
50
no limits
pF
pF
2.0
5.0
Fig.13
t
rem
removal time
MR to A, B
120
24
20
39
14
11
150
30
26
180
36
31
ns
ns
ns
2.0
4.5
6.0
Fig.7