CD74ACT139 Dual 2-to-4 Line Decoder/Demultiplexer |

CD74ACT139 (ACTIVE) Dual 2-to-4 Line Decoder/Demultiplexer

Dual 2-to-4 Line Decoder/Demultiplexer - CD74ACT139


The ’ACT139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 4.5-V to 5.5-V VCC operation. These devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When used with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

The active-low enable (G)\ input can be used as a data line in demultiplexing applications. These decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit.


  • AC Types Feature 1.5-V to 5.5-V Operation and Balanced Noise Immunity at 30% of the Supply Voltage
  • Buffered Inputs
  • Incorporate Two Enable Inputs to Simplify Cascading and/or Data Reception
  • Speed of Bipolar F, AS, and S, With Significantly Reduced Power Consumption
  • Balanced Propagation Delays
  • ±24-mA Output Drive Current
    • Fanout to 15 F Devices
  • SCR-Latchup-Resistant CMOS Process and Circuit Design
  • Exceeds 2-kV ESD Protection Per MIL-STD-883, Method 3015


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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)
CD74ACT139 Order now Decoder
ACT     4.5     5.5     2     5     90     0.08     10.5     2:4     Standard     24     -24     Catalog     -55 to 125     PDIP | 16
SOIC | 16    
See datasheet (PDIP)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
4     5     0.75     2    
CD54ACT139 Samples not available Decoder/Demultiplexer     ACT     4.5     5.5     2     5     90     0.08     10.5     2:4     Standard     24/-24       Military     -55 to 125     CDIP | 16     See datasheet (CDIP)       5     0.75     2