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74HC5555D-T Datasheet, PDF (10/23 Pages) NXP Semiconductors – Programmable delay timer with oscillator | |||
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Philips Semiconductors
Programmable delay timer with oscillator
Product speciï¬cation
74HC/HCT5555
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF.
Tamb (°C)
TEST CONDITION
SYMBOL PARAMETER
+25
â40 to +85 â40 to +125 UNIT
MIN TYP MAX MIN MAX MIN MAX
VCC
(V)
WAVEFORMS
tPLH/tPHL propagation
â
delay A, B to â
Q, Q
â
77 240 â
28 48 â
22 41 â
300 â
60 â
51 â
360 ns 2.0
72 ns 4.5
61 ns 6.0
tPLH/tPHL propagation
â
delay MR to Q, â
Q
â
61 185 â
22 37 â
18 31 â
230 â
46 â
39 â
280 ns 2.0
56 ns 4.5
48 ns 6.0
tPLH/tPHL propagation
â
delay RS to Q, â
Q
â
83 250 â
30 50 â
24 43 â
315 â
63 â
54 â
375 ns 2.0
75 ns 4.5
64 ns 6.0
tTHL/tTLH output
â
transition time â
â
19 75 â
7
15 â
6
13 â
95 â
19 â
16 â
110 ns 2.0
22 ns 4.5
19 ns 6.0
tW
trigger pulse
70 17 â
90 â
105 â
ns 2.0
width
14 6
â
18 â
21 â
ns 4.5
A = HIGH
12 5
â
15 â
18 â
ns 6.0
Fig.6
Fig.7
Fig.8; note 1
Fig.6
Fig.6
tW
tW
tW
trt
REXT
CEXT
trem
B = LOW
master reset
pulse width
HIGH
70 19 â
14 7
â
12 6
â
90 â
18
15
105 â
21 â
18 â
clock pulse
80 25 â
width RS;
16 9
â
HIGH or LOW 14 7
â
100 â
20 â
17 â
120 â
24 â
20 â
minimum
â
275 â
â
â
â
â
output pulse
â
100 â
â
â
â
â
width
â
80 â
â
â
â
â
Q = HIGH,
Q = LOW
retrigger time â
0
â
â
â
â
â
A, B
â
0
â
â
â
â
â
â
0
â
â
â
â
â
external timing 5
â
1000 â
â
â
â
resistor
1
â
1000 â
â
â
â
â
â
external timing 50
capacitor
50
no limits
removal time 120 39 â
MR to A, B
24 14 â
20 11 â
150 â
30 â
26 â
180 â
36 â
31 â
ns 2.0
ns 4.5
ns 6.0
ns 2.0
ns 4.5
ns 6.0
ns 2.0
ns 4.5
ns 6.0
ns 2.0
ns 4.5
ns 6.0
k⦠2.0
k⦠5.0
pF 2.0
pF 5.0
ns 2.0
ns 4.5
ns 6.0
Fig.7
Fig.8
Fig.6; note 1
Fig.10; note 2
Fig.13
Fig.13
Fig.7
September 1993
10
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