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Product details

Parameters

Technology Family ACT Function Decoder, Demultiplexer Configuration 3:8 Channels (#) 1 VCC (Min) (V) 4.5 VCC (Max) (V) 5.5 Input type TTL Output type CMOS open-in-new Find other Encoders & decoders

Package | Pins | Size

PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (D) 16 59 mm² 9.9 x 6 open-in-new Find other Encoders & decoders

Features

  • Inputs Are TTL-Voltage Compatible
  • Speed of Bipolar F, AS, and S, With Significantly Reduced Power Consumption
  • Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
  • Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception
  • 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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Description

The ’ACT138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed 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 conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications (See Application Information).

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet CD54ACT138, CD74ACT138 datasheet (Rev. A) Feb. 21, 2003
Selection guide Logic Guide (Rev. AB) Jun. 12, 2017
Application note Implications of Slow or Floating CMOS Inputs (Rev. D) Jun. 23, 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
User guide LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
Application note Selecting the Right Level Translation Solution (Rev. A) Jun. 22, 2004
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application note TI IBIS File Creation, Validation, and Distribution Processes Aug. 29, 2002
Application note CMOS Power Consumption and CPD Calculation (Rev. B) Jun. 01, 1997
Application note Designing With Logic (Rev. C) Jun. 01, 1997
Application note Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc Apr. 01, 1996

Design & development

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Hardware development

EVALUATION BOARD Download
10
Description
This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, P, N, or DGV package in a 14 to 24 pin count.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic devices

CAD/CAE symbols

Package Pins Download
PDIP (N) 16 View options
SOIC (D) 16 View options

Ordering & quality

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