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74HC147D,653 数据手册 - NXP（恩智浦）
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74HC147D,653数据手册
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December 1990 7
Philips Semiconductors Product specification
10-to-4 line priority encoder 74HC/HCT147
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard
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
AC WAVEFORMS
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
INPUT UNIT LOAD COEFFICIENT
A
3
, A
4
, A
7
, A
8
1.50
A
5
, A
6
, A
0
, A
1
, A
2
1.10
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
A
n
to Y
n
20 35 44 53 ns 4.5 Fig.6
t
THL
/ t
TLH
output transition
time
7 15 19 22 ns 4.5 Fig.6
Fig.6 Waveforms showing the decimal data inputs (A
n
) to output (Y
n
) propagation delays and the output
transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
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