Dual 2-Line To 4-Line Decoders / Demultiplexers - SN74AHCT139

SN74AHCT139 (ACTIVE)

Dual 2-Line To 4-Line Decoders / Demultiplexers

 

Description

The ’AHCT139 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.

Features

  • Inputs Are TTL-Voltage Compatible
  • Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
  • Incorporate Two Enable Inputs to Simplify Cascading and/or Data Reception
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

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Parametrics Compare all products in Buffered Encoders and Decoders

 
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
Output Drive (IOL/IOH) (Max) (mA)
Bits (#)
Rating
Operating Temperature Range (C)
Pin/Package
SN74AHCT139
Decoder/Demultiplexer   
AHCT   
4.5   
5.5   
2   
5   
70   
0.02   
8.5   
2:4   
Standard   
8/-8   
4   
Catalog   
-40 to 85   
16PDIP
16SOIC
16SSOP
16TSSOP
16TVSOP