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74LS14 Datasheet

  • 74LS14

  • LOW POWER SCHOTTKY

  • 8頁

  • ONSEMI

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SN74LS147 SN74LS148
10-Line-to-4-Line
and 8-Line-to-3-Line
Priority Encoders
The SN74LS147 and the SN74LS148 are Priority Encoders. They
provide priority decoding of the inputs to ensure that only the highest
order data line is encoded. Both devices have data inputs and outputs
which are active at the low logic level.
The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The
implied decimal zero condition does not require an input condition
because zero is encoded when all nine data lines are at a high logic
level.
The LS148 encodes eight data lines to three-line (4-2-1) binary
(octal). By providing cascading circuitry (Enable Input EI and Enable
Output EO) octal expansion is allowed without needing external
circuitry.
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Output Current 鈥?High
Output Current 鈥?Low
Min
4.75
0
Typ
5.0
25
Max
5.25
70
鈥?0.4
8.0
Unit
V
擄C
mA
mA
http://onsemi.com
LOW
POWER
SCHOTTKY
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
SN74LS147N
SN74LS147D
SN74LS148N
SN74LS148D
Package
16 Pin DIP
16 Pin
16 Pin DIP
16 Pin
Shipping
2000 Units/Box
2500/Tape & Reel
2000 Units/Box
2500/Tape & Reel
漏
Semiconductor Components Industries, LLC, 1999
1
December, 1999 鈥?Rev. 6
Publication Order Number:
SN74LS147/D

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