SN74LS147, SN74LS148
10−Line−to−4−Line and 8−Line−to−3−Line Priority Encoders
The SN74LS147 and the SN74LS148 are Prior...
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
Parameter
Min Typ Max Unit
VCC
Supply Voltage
TA
Operating Ambient
Temperature Range
4.75 5.0 5.25
V
0
25
70
°C
IOH
Output Current − High
IOL
Output Current − Low
−0.4 mA
8.0
mA
http://onsemi.com
LOW POWER
SCHOTTKY
16 1 PLASTIC N SUFFIX CASE 648
16 1
SOIC D SUFFIX CASE 751B
ORDERING INFORMATION
Device
Package
Shipping
SN74LS147N
16 Pin DIP 2000 Units/Box
SN74LS147D
SOIC−16
38 Units/Rail
SN74LS147DR2 SOIC−16 2500/Tape & Reel
SN74LS148N
16 Pin DIP 2000 Units/Box
SN74LS148D
SOIC−16
38 Units/Rail
SN74LS148DR2 SOIC−16 2500/Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 8
Publication Order Number: SN74LS147/D
SN74LS147, SN74LS148
SN74LS147 (TOP ...