參數(shù)資料
型號(hào): 74HCT373
廠商: NXP Semiconductors N.V.
英文描述: Octal D-type transparent latch;3-state(八 D透明鎖存器;三態(tài);)
中文描述: 八路D型透明鎖存器,3態(tài)(八?透明鎖存器,三態(tài);)
文件頁(yè)數(shù): 6/8頁(yè)
文件大小: 56K
代理商: 74HCT373
September 1993
6
Philips Semiconductors
Product specification
Octal D-type transparent latch; 3-state
74HC/HCT373
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (
I
CC
) for a unit load of 1 is given in the family specifications.
To determine
I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
INPUT
UNIT LOAD COEFFICIENT
D
n
LE
OE
0.30
1.50
1.00
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
D
n
to Q
n
propagation delay
LE to Q
n
3-state output enable time
OE to Q
n
3-state output disable time
OE to Q
n
output transition time
17
30
38
45
ns
4.5
Fig.7
t
PHL
/ t
PLH
16
32
40
48
ns
4.5
Fig.8
t
PZH
/ t
PZL
19
32
40
48
ns
4.5
Fig.9
t
PHZ
/ t
PLZ
18
30
38
45
ns
4.5
Fig.9
t
THL
/ t
TLH
5
12
15
18
ns
4.5
Fig.7
t
W
LE pulse width
HIGH
set-up time
D
n
to LE
hold time
D
n
to LE
16
4
20
24
ns
4.5
Fig.8
t
su
12
6
15
18
ns
4.5
Fig.10
t
h
4
1
4
4
ns
4.5
Fig.10
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