74HC147 Philips, 74HC147 Datasheet - Page 7

• Manufacturer Part Number: 74HC147
• Description: 10-to-4 line priority encoder
• Manufacturer: Philips

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
AC WAVEFORMS
PACKAGE OUTLINES
See
December 1990
CC
INPUT
A
A
SYMBOL PARAMETER
t
t
PHL
THL
3
5
10-to-4 line priority encoder
, A
, A
(1) HC : V
Fig.6
category: MSI
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
/ t
/ t
4
6
TLH
PLH
HCT: V
, A
, A
7
0
, A
, A
Waveforms showing the decimal data inputs (A
transition times.
M
propagation delay
output transition
time
M
r
A
8
1
= 1.3 V; V
= t
= 50%; V
, A
n
CC
to Y
f
2
= 6 ns; C
per input, multiply this value by the unit load coefficient shown in the table below.
n
I
UNIT LOAD COEFFICIENT
1.50
1.10
I
= GND to V
= GND to 3 V.
L
= 50 pF
CC
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
min.
20
7
typ.
25
35
15
max.
CC
) for a unit load of 1 is given in the family specifications.
T
.
74HCT
amb
min.
n
7
) to output (Y
40 to 85
( C)
44
19
max.
min.
n
) propagation delays and the output
40 to 125
53
22
max.
.
ns
ns
UNIT
74HC/HCT147
4.5
4.5
V
TEST CONDITIONS
(V)
Product specification
CC
WAVEFORMS
Fig.6
Fig.6