參數(shù)資料
型號(hào): 74HCT5555
廠商: NXP Semiconductors N.V.
英文描述: Programmable delay timer with oscillator
中文描述: 與振蕩器可編程延遲計(jì)時(shí)器
文件頁數(shù): 14/23頁
文件大?。?/td> 142K
代理商: 74HCT5555
September 1993
14
Philips Semiconductors
Product specification
Programmable delay timer with oscillator
74HC/HCT5555
AC CHARACTERISTICS FOR 74HCT
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
propagation
delay MR to Q,
Q
propagation
delay RS to Q,
Q
output
transition time
trigger pulse
width
A = HIGH
B = LOW
master reset
pulse width
HIGH
clock pulse
width RS;
HIGH or LOW
minimum
output pulse
width
Q = HIGH,
Q = LOW
retrigger time
A, B
external timing
resistor
external timing
capacitor
removal time
MR to A, B
maximum
clock pulse
frequency
maximum
clock pulse
frequency
28
48
60
72
ns
4.5
Fig.6
t
PHL
/t
PLH
24
41
51
62
ns
4.5
Fig.7
t
PHL
/t
PLH
32
54
68
81
ns
4.5
Fig.8; note 1
t
THL
/t
TLH
7
15
19
22
ns
4.5
Fig.6
t
W
21
12
26
32
ns
4.5
Fig.6
t
W
14
5
18
21
ns
4.5
Fig.7
t
W
16
9
20
24
ns
4.5
Fig.8
t
W
100
ns
4.5
Fig.6
t
rt
0
ns
4.5
Fig.10; note 2
R
EXT
1
1000
k
4.5
Fig.13
C
EXT
50
no limits
pF
4.5
Fig.13
t
rem
24
14
30
36
ns
4.5
Fig.7
f
max
10
18
8
6.6
MHz
4.5
Fig.8; note 3
f
max
30
75
24
20
MHz
4.5
Fig.9; note 4
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