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SN74LS138DR - Texas Instruments

Description: 3-line to 8-line decoder / demultiplexer

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SN74LS138DR Details

  • Manufacturer Part Number:

    SN74LS138DR

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    16

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    3 ENABLE INPUTS

  • Family:

    LS

  • Input Conditioning:

    STANDARD

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    9.9 mm

  • Load Capacitance (CL):

    15 pF

  • Logic IC Type:

    3-LINE TO 8-LINE DECODER

  • Max I(ol):

    0.008 A

  • Moisture Sensitivity Level:

    1

  • Number of Bits:

    8

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Polarity:

    INVERTED

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP16,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    TR

  • Peak Reflow Temperature (Cel):

    260

  • Power Supply Current-Max (ICC):

    10 mA

  • Prop. Delay@Nom-Sup:

    41 ns

  • Propagation Delay (tpd):

    41 ns

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Voltage-Max (Vsup):

    5.25 V

  • Supply Voltage-Min (Vsup):

    4.75 V

  • Supply Voltage-Nom (Vsup):

    5 V

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

SN74LS138DR Frequently Asked Questions (FAQs)

  • The maximum frequency of operation for the SN74LS138DR is typically around 25 MHz, but it can vary depending on the specific application and operating conditions.
  • To ensure proper power and decoupling, connect the VCC pin to a stable 5V power supply, and decouple the power pins with 0.1uF ceramic capacitors. Additionally, use a 10uF electrolytic capacitor for bulk decoupling.
  • The recommended input rise and fall time for the SN74LS138DR is typically around 10ns to 20ns to ensure proper operation and minimize switching noise.
  • The enable inputs (E1, E2, E3) should be connected to a logic low (GND) to enable the decoder output. If not used, tie them to GND to prevent floating inputs.
  • The maximum output current that the SN74LS138DR can sink or source is typically around 16mA per output pin, but it's recommended to limit the output current to 10mA or less to ensure reliable operation.

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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Part Image SN74LS138D onsemi

3-LINE TO 8-LINE DECODER, LS Series, Inverted Output, TTL, PDSO16

Part Image DM74LS138M Texas Instruments

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Part Image T74LS138M1 STMicroelectronics

3-LINE TO 8-LINE DECODER, LS Series, Inverted Output, TTL, PDSO16

Part Image DM74LS138M Fairchild Semiconductor Corporation

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Part Image DM74LS138MX Fairchild Semiconductor Corporation

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For a full list of alternate parts for SN74LS138DR, check out Findchips.com