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SN74ALS540DW - Texas Instruments

Description: Octal Buffers/Drivers With 3-State Outputs

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PCB Footprints
SN74ALS540DW - Texas Instruments PCB footprint - Other - Other - SOIC127P1032X265-20N
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SN74ALS540DW - Texas Instruments  - 3D model - Other - SOIC127P1032X265-20N
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SN74ALS540DW Details

  • Manufacturer Part Number:

    SN74ALS540DW

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Pin Count:

    20

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Additional Feature:

    WITH DUAL OUTPUT ENABLE

  • Control Type:

    ENABLE LOW

  • Count Direction:

    UNIDIRECTIONAL

  • Family:

    ALS

  • JESD-30 Code:

    R-PDSO-G20

  • JESD-609 Code:

    e4

  • Length:

    12.8 mm

  • Load Capacitance (CL):

    50 pF

  • Logic IC Type:

    BUS DRIVER

  • Max I(ol):

    0.024 A

  • Moisture Sensitivity Level:

    1

  • Number of Bits:

    8

  • Number of Functions:

    8

  • Number of Ports:

    2

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    70 °C

  • Output Characteristics:

    3-STATE

  • Output Polarity:

    INVERTED

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP20,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    TUBE

  • Peak Reflow Temperature (Cel):

    260

  • Power Supply Current-Max (ICC):

    25 mA

  • Prop. Delay@Nom-Sup:

    12 ns

  • Propagation Delay (tpd):

    12 ns

  • Qualification Status:

    Not Qualified

  • Screening Level:

    MIL-PRF-38535

  • Seated Height-Max:

    2.65 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:

    7.5 mm

SN74ALS540DW Frequently Asked Questions (FAQs)

  • The maximum operating frequency of the SN74ALS540DW is 100 MHz, but it can vary depending on the load capacitance and the output current.
  • To ensure signal integrity, use a low-impedance PCB design, keep the signal traces short, and use termination resistors to match the impedance of the transmission line. Additionally, use a decoupling capacitor to reduce noise and ringing.
  • The recommended power-on sequence is to apply VCC first, followed by the input signals. This ensures that the device is properly initialized and minimizes the risk of latch-up or damage.
  • Yes, the SN74ALS540DW is compatible with 3.3V systems, but the output voltage will be limited to 3.3V. Additionally, the input voltage threshold may be affected, and the device may not meet the specified propagation delay times.
  • To handle thermal issues, ensure good thermal conductivity between the device and the PCB, use a heat sink if necessary, and keep the device away from other heat sources. Monitor the junction temperature and reduce the power consumption if necessary.

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SN74ALS540DW Overview

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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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