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74LS148 Series

8-line to 3-line priority encoder

Manufacturer: Texas Instruments

Catalog(3 parts)

PartOperating Temperature▲▼Operating Temperature▲▼Voltage Supply SourceCurrent - Output High, Low▲▼Current - Output High, Low▲▼TypeIndependent Circuits▲▼Mounting TypeVoltage - Supply▲▼Voltage - Supply▲▼CircuitPackage / CasePackage / Case▲▼Supplier Device Package
Texas Instruments
SN74LS148D
Priority Encoder 1 x 8:3 16-SOIC
70 °C
0 °C
Single Supply
0.00800000037997961 A
0.00039999998989515007 A
Priority Encoder
1 ul
Surface Mount
4.75 V
5.25 V
1 x 8:3
16-SOIC
0.003911599982529879 m, 3.900000095367432 ul
16-SOIC
Texas Instruments
SN74LS148DG4
Priority Encoder 1 x 8:3 16-SOIC
70 °C
0 °C
Single Supply
0.00800000037997961 A
0.00039999998989515007 A
Priority Encoder
1 ul
Surface Mount
4.75 V
5.25 V
1 x 8:3
16-SOIC
0.003911599982529879 m, 3.900000095367432 ul
16-SOIC
Texas Instruments
SN74LS148NSR
Priority Encoder 1 x 8:3 16-SO
70 °C
0 °C
Single Supply
0.00800000037997961 A
0.00039999998989515007 A
Priority Encoder
1 ul
Surface Mount
4.75 V
5.25 V
1 x 8:3
16-SOIC (0.209", 5.30mm Width)
16-SO

Key Features

• '147, 'LS147Encodes 10-Line Decimal to 4-Line BCDApplications Include:Keyboard EncodingRange Selection'148, 'LS148Encodes 8 Data Lines to 3-Line Binary (Octal)Applications Include:N-Bit EncodingCode Converters and GeneratorsNOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.'147, 'LS147Encodes 10-Line Decimal to 4-Line BCDApplications Include:Keyboard EncodingRange Selection'148, 'LS148Encodes 8 Data Lines to 3-Line Binary (Octal)Applications Include:N-Bit EncodingCode Converters and GeneratorsNOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.

Description

AI
These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively. These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively.