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74F148SC 데이터시트(PDF) 1 Page - Fairchild Semiconductor

부품명 74F148SC
상세설명  8-Line to 3-Line Priority Encoder
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제조업체  FAIRCHILD [Fairchild Semiconductor]
홈페이지  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74F148SC 데이터시트(HTML) 1 Page - Fairchild Semiconductor

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© 1999 Fairchild Semiconductor Corporation
DS009480
www.fairchildsemi.com
April 1988
Revised July 1999
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.
Features
s Encodes eight data lines in priority
s Provides 3-bit binary priority code
s Input enable capability
s Signals when data is present on any input
s Cascadable for priority encoding of n bits
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Order Number
Package Number
Package Description
74F148SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F148SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F148PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs
Outputs
EI
I0
I1
I2
I3
I4
I5
I6
I7 GS A0 A1 A2 EO
H
X
XXX
XXX
X
H
H
H
H
H
L
HHH
HHH
HH
H
H
HH
L
L
X
XXX
XXX
L
L
L
L
L
H
L
X
XXX
XX
L
H
L
H
L
L
H
L
X
XXX
X
L
H
H
L
L
H
L
H
L
X
XXX
L
H
H
H
L
H
H
L
H
LX
X
X
L
H
H
H
H
L
L
L
H
H
L
X
X
L
HHH
HH
L
H
L
H
H
L
X
L
H
HHH
HH
L
L
HH
H
L
L
HH
HHH
HH
L
H
HH
H


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