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HD74LS148P Datasheet

8-line-to-3-line Octal Priority Encoder

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HD74LS148
8-line-to-3-line Octal Priority Encoder
REJ03D0437–0200
Rev.2.00
Feb.18.2005
The HD74LS148 encodes eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and
enable output EO) has been provided to allow octal expansion without the need for external circuitry. The data inputs
and outputs are active at the low logic level.
Features
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74LS148P
DILP-16 pin
PRDP0016AE-B
P
(DP-16FV)
HD74LS148FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
Pin Arrangement
41
52
Inputs 6 3
74
EI 5
A2 6
Outputs
A1 7
GND 8
4
5
EO
6
GS
7
3
EI
2
A2
1
A1
0
A0
16 VCC
15 EO
Outputs
14 GS
13 3
12 2
11 1
Inputs
10 0
9 A0 Outputs
(Top view)
Rev.2.00, Feb.18.2005, page 1 of 5


Renesas Electronics Components Datasheet

HD74LS148P Datasheet

8-line-to-3-line Octal Priority Encoder

No Preview Available !

HD74LS148
Function Table
Inputs
Outputs
EI
0
1
2
3
4
5
6
7
A2
A1
A0
GS EO
H
X
X
X
X
X
X
X
X
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
X
X
X
X
X
X
X
L
L
L
L
L
H
L
X
X
X
X
X
X
L
H
L
L
H
L
H
L
X
X
X
X
X
L
H
H
L
H
L
L
H
L
X
X
X
X
L
H
H
H
L
H
H
L
H
L
X
X
X
L
H
H
H
H
H
L
L
L
H
L
X
X
L
H
H
H
H
H
H
L
H
L
H
L
X
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H ; high level, L ; low level, X ; irrelevant
Block Diagram
0
EO
1
GS
2
A0
3
4
A1
5
6
7
A2
EI
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
7
V
Input voltage
VIN
7
V
Power dissipation
PT
400
mW
Storage temperature
Tstg
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Rev.2.00, Feb.18.2005, page 2 of 5


Part Number HD74LS148P
Description 8-line-to-3-line Octal Priority Encoder
Maker Renesas
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HD74LS148P Datasheet PDF






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