74F148SJ Fairchild Semiconductor, 74F148SJ Datasheet
74F148SJ
Manufacturer Part Number
74F148SJ
Description
Encoders, Decoders, Multiplexers & Demultiplexers 8-Ln to 3-Ln Pri Enc
Manufacturer
Fairchild Semiconductor
Specifications of 74F148SJ
Product
Decoders, Encoders, Multiplexers & Demultiplexers
Logic Family
74F
Number Of Bits
3
Number Of Lines (input / Output)
8.0 / 3.0
Propagation Delay Time
10.5 ns at 5 V
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Temperature
+ 70 C
Package / Case
SOP-16
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Number Of Input Lines
8.0
Number Of Output Lines
3.0
Lead Free Status / Rohs Status
Details
© 1999 Fairchild Semiconductor Corporation
74F148SC
74F148SJ
74F148PC
74F148
8-Line to 3-Line Priority Encoder
General Description
The F148 provides three bits of binary coded output repre-
senting the position of the highest order active input, along
with an output indicating the presence of any active input. It
is easily expanded via input and output enables to provide
priority encoding over many bits.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Order Number
Package Number
IEEE/IEC
M16A
M16D
N16E
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DS009480
Features
Connection Diagram
Truth Table
H
L
X
EI I
H
L
L
L
L
L
L
L
L
L
Encodes eight data lines in priority
Provides 3-bit binary priority code
Input enable capability
Signals when data is present on any input
Cascadable for priority encoding of n bits
LOW Voltage Level
Immaterial
HIGH Voltage Level
H
X
X
X
X
X
X
X
X
L
0
Package Description
I
H
H
X
X
X
X
X
X
X
L
1
I
H
H
H
X
X
X
X
X
X
L
2
Inputs
I
H
H
H
H
X
X
X
X
X
L
3
I
H
H
H
H
H
X
X
X
X
L
4
I
H
H
H
H
H
H
X
X
X
L
5
I
X
H
X
H
H
H
H
H
H
April 1988
Revised July 1999
L
6
H
H
H
H
H
H
H
H
I
X
L
7
GS A
www.fairchildsemi.com
H
H
L
L
L
L
L
L
L
L
H
H
H
H
H
H
L
L
L
L
Outputs
0
A
H
H
H
H
H
H
L
L
L
L
1
A
H
H
H
H
H
H
L
L
L
L
2
EO
H
H
H
H
H
H
H
H
H
L
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