參數(shù)資料
型號(hào): 74HC193
廠商: NXP Semiconductors N.V.
元件分類(lèi): 通用總線功能
英文描述: Presettable synchronous 4-bit binary up/down counter
中文描述: 可預(yù)置同步4位二進(jìn)制加/減計(jì)數(shù)器
文件頁(yè)數(shù): 10/13頁(yè)
文件大?。?/td> 95K
代理商: 74HC193
December 1990
10
Philips Semiconductors
Product specification
Presettable synchronous 4-bit binary
up/down counter
74HC/HCT193
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
SYMBOL PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min. max. min.
max.
t
PHL
/ t
PLH
propagation delay
CP
U
, CP
D
to Q
n
propagation delay
CP
U
to TC
U
propagation delay
CP
D
to TC
D
propagation delay
PL to Q
n
propagation delay
MR to Q
n
propagation delay
D
n
to Q
n
propagation delay
PL to TC
U
, PL to TC
D
propagation delay
MR to TC
U
, MR to TC
D
propagation delay
D
n
to TC
U
, D
n
to TC
D
output transition time
23
43
54
65
ns
4.5
Fig.7
t
PHL
/ t
PLH
15
27
34
41
ns
4.5
Fig.8
t
PHL
/ t
PLH
15
27
34
41
ns
4.5
Fig.8
t
PHL
/ t
PLH
26
46
58
69
ns
4.5
Fig.9
t
PHL
22
40
50
60
ns
4.5
Fig.10
t
PHL
/ t
PLH
27
46
58
69
ns
4.5
Fig.9
t
PHL
/ t
PLH
31
55
69
83
ns
4.5
Fig.12
t
PHL
/ t
PLH
29
55
69
83
ns
4.5
Fig.12
t
PHL
/ t
PLH
32
58
73
87
ns
4.5
Fig.12
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Fig.10
t
W
up, down clock pulse width
HIGH or LOW
master reset pulse width
HIGH
parallel load pulse width
LOW
removal time
PL to CP
U
, CP
D
removal time
MR to CP
U
, CP
D
set-up time
D
n
to PL
25
11
31
38
ns
4.5
Fig.7
t
W
20
7
25
30
ns
4.5
Fig.10
t
W
20
8
25
30
ns
4.5
Fig.9
t
rem
10
2
13
15
ns
4.5
Fig.9
t
rem
10
0
13
15
ns
4.5
Fig.10
t
su
16
8
20
24
ns
4.5
Fig.11 note:
CP
U
= CP
D
=
HIGH
Fig.11
t
h
hold time
D
n
to PL
hold time
CP
U
to CP
D
, CP
D
to CP
U
maximum up, down clock
pulse frequency
0
6
0
0
ns
4.5
t
h
16
7
20
24
ns
4.5
Fig.13
f
max
20
43
16
13
MHz
4.5
Fig.7
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