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
HD74LS148P
HD74LS148FPEL
Package Type
DILP-16 pin
SOP-16 pin (JEITA)
Package Code
(Previous Code)
PRDP0016AE-B
(DP-16FV)
PRSP0016DH-B
(FP-16DAV)
Package
Abbreviation
P
FP
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
Note: Please consult the sales office for the above package availability.
Pin Arrangement
4
5
Inputs
6
7
EI
A
2
Outputs
A
1
GND
1
4
2
3
4
5
6
7
8
5
6
7
EI
A
2
A
1
A
0
EO
GS
3
2
1
0
16
15
14
13
12
11
10
9
V
CC
EO
Outputs
GS
3
2
Inputs
1
0
A
0
Outputs
(Top view)
Rev.2.00, Feb.18.2005, page 1 of 5