SN74AS253A Dual 1-Of-4 Data Selectors/Multiplexers With 3-State Outputs |

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Dual 1-Of-4 Data Selectors/Multiplexers With 3-State Outputs



These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two 4-line sections.

The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Each output has its own output-enable () input. The output is disabled when is high.

The SN54ALS253 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS253 and SN74AS253A are characterized for operation from 0°C to 70°C.



Select inputs A and B are common to both sections.


  • 3-State Versions of the ´ALS153 and SN74AS153
  • Permits Multiplexing From n Lines to
    One Line
  • Performs Parallel-to-Serial Conversion
  • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs


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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)
SN74AS253A Order now Encoder
AS     4.5     5.5     2     5     125     14     21     4:1     3-State Output     24     -2.6     Catalog     0 to 70     SOIC | 16     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     4     5     0.75     2