SN74LS348 8-Line To 3-Line Priority Encoder |

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8-Line To 3-Line Priority Encoder

8-Line To 3-Line Priority Encoder - SN74LS348


These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The 'LS348 circuits encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion. Outputs A0, A1, and A2 are implemented in three-state logic for easy expansion up to 64 lines without the need for external circuitry. See Typical Application Data.



  • 3-State Outputs Drive Bus Lines Directly
  • Encodes 8 Data Lines to 3-Line Binary (Octal)
  • Applications Include:
    • N-Bit Encoding
    • Code Converters and Generators
  • Typical Data Delay … 15 ns
  • Typical Power Dissipation … 60 mW



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Part number Order Function Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) Configuration Type IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Bits (#) Digital input leakage (Max) (uA) ESD CDM (kV) ESD HBM (kV)
SN74LS348 Order now Encoder
LS     4.75     5.25     1     5     35     25     35     8:3     3-State Output     24     -2.6     Catalog     0 to 70     PDIP | 16
SOIC | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
8     5     0.75     2