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SN74ALS138ADR - Texas Instruments

Description: Texas Instruments SN74ALS138ADR, Decoder, Demultiplexer, 1-of-8, Inverting, 4.5 → 5.5 V, 16-Pin SOIC

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SN74ALS138ADR - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D (R-PDSO-G16)
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SN74ALS138ADR - Texas Instruments  - 3D model - Small Outline Packages - D (R-PDSO-G16)
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SN74ALS138ADR Details

  • Manufacturer Part Number:

    SN74ALS138ADR

  • 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:

    2 ACTIVE-LOW AND 1 ACTIVE-HIGH ENABLE INPUT, SCHOTTKY-CLAMPED FOR HIGH PERFORMANCE

  • Family:

    ALS

  • Input Conditioning:

    STANDARD

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    9.9 mm

  • Load Capacitance (CL):

    50 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 Characteristics:

    OPEN-COLLECTOR

  • 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:

    22 ns

  • Propagation Delay (tpd):

    22 ns

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Voltage-Max (Vsup):

    5.5 V

  • Supply Voltage-Min (Vsup):

    4.5 V

  • Supply Voltage-Nom (Vsup):

    5 V

  • Surface Mount:

    YES

  • Technology:

    TTL

  • 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

SN74ALS138ADR Frequently Asked Questions (FAQs)

  • The maximum frequency of operation for the SN74ALS138ADR is typically 100 MHz, but it can vary depending on the specific application and operating conditions.
  • To ensure signal integrity, use proper PCB layout techniques, such as using controlled impedance traces, minimizing trace lengths, and using termination resistors as needed. Additionally, consider using a signal integrity analysis tool to simulate and optimize your design.
  • Yes, the SN74ALS138ADR can be used in a 3.3V system, but the output voltage will be limited to 3.3V. This may affect the noise margin and signal integrity, so ensure that the receiving device can tolerate the reduced voltage swing.
  • To ensure proper power sequencing, ensure that the VCC pin is powered up before the input signals. A power-up sequence of VCC, then inputs, and finally outputs is recommended to prevent latch-up or other unexpected behavior.
  • The recommended termination scheme for the SN74ALS138ADR is to use a series terminator (e.g., 22-33 ohms) at the receiving end of the transmission line to match the impedance of the line and minimize reflections.

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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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