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Texas Instruments SN74ACT138-Q1 3-to-8 Line Inverting Decoders/Demux

Texas Instruments SN74ACT138-Q1 3-to-8 Line Inverting Decoders/Demultiplexers contain a three-to-eight decoder with one standard output strobe (G2) and two active low output strobes (G1 and G0). When the Texas Instruments SN74ACT138-Q1 outputs are gated by any of the strobe inputs, the inputs are all forced into the low state. The selected output is high, while all others are low when the strobe inputs do not disable the outputs. TTL-compatible CMOS inputs provide the capability to up-translate input signals from as low as 2V up to 5V outputs.

Features

  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1 (-40°C to +125°C)
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Available in wettable flank QFN package
  • Operating voltage range of 4.5V to 5.5V
  • TTL-compatible inputs
  • Continuous ±24mA output drive at 5V
  • Supports up to ±75mA output drive at 5V in short bursts
  • Drives 50Ω transmission lines
  • Maximum tpd of 10.2ns (VCC = 5V, CL = 50pF)

Applications

  • Memory device selection with shared data bus
  • Route data
  • Reduce the required number of outputs for chip-select applications

Logic Diagram (Positive Logic)

Block Diagram - Texas Instruments SN74ACT138-Q1 3-to-8 Line Inverting Decoders/Demux

Additional Resources

Development Tools

Texas Instruments 14-24-LOGIC-EVM Logic Evaluation Module (EVM)

Generic evaluation module developed to support any TI logic leaded device in a 14 to 24 pin count.

Learn Moreabout Texas Instruments 14-24-LOGIC-EVM Logic Evaluation Module (EVM) View Productsrelated to Texas Instruments 14-24-LOGIC-EVM Logic Evaluation Module (EVM)

Texas Instruments 14-24-NL-LOGIC-EVM Logic Evaluation Module (EVM)

Supports any logic or translation device in a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.

Learn Moreabout Texas Instruments 14-24-NL-LOGIC-EVM Logic Evaluation Module (EVM) View Productsrelated to Texas Instruments 14-24-NL-LOGIC-EVM Logic Evaluation Module (EVM)
Published: 2024-08-27 | Updated: 2025-05-15