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SN74LS21D - Texas Instruments

Description: Dual 4-input positive-AND gates

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SN74LS21D - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D (R-PDSO-G14)
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SN74LS21D - Texas Instruments  - 3D model - Small Outline Packages - D (R-PDSO-G14)
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SN74LS21D Details

  • Manufacturer Part Number:

    SN74LS21D

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    SOIC-14

  • Pin Count:

    14

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Family:

    LS

  • JESD-30 Code:

    R-PDSO-G14

  • JESD-609 Code:

    e4

  • Length:

    8.65 mm

  • Load Capacitance (CL):

    15 pF

  • Logic IC Type:

    AND GATE

  • Max I(ol):

    0.008 A

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    2

  • Number of Inputs:

    4

  • Number of Terminals:

    14

  • Operating Temperature-Max:

    70 °C

  • Output Characteristics:

    TOTEM-POLE

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP14,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    TUBE

  • Peak Reflow Temperature (Cel):

    260

  • Power Supply Current-Max (ICC):

    4.4 mA

  • Prop. Delay@Nom-Sup:

    20 ns

  • Propagation Delay (tpd):

    20 ns

  • Qualification Status:

    Not Qualified

  • Schmitt Trigger:

    NO

  • 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:

    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

SN74LS21D Frequently Asked Questions (FAQs)

  • The maximum frequency of operation for the SN74LS21D is typically 25 MHz, but it can vary depending on the specific application and operating conditions.
  • To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its specified temperature range (-40°C to 85°C).
  • The recommended power-on sequence for the SN74LS21D is to apply power to the VCC pin first, followed by the input signals. This helps to prevent unwanted oscillations and ensures proper device operation.
  • To handle EMI when using the SN74LS21D, it is recommended to follow proper PCB design practices, such as using a solid ground plane, minimizing trace lengths, and using shielding and filtering as necessary.
  • The maximum input voltage that can be applied to the SN74LS21D is 5.5V, which is the absolute maximum rating. However, it is recommended to operate the device within the recommended operating voltage range of 4.75V to 5.25V for optimal performance.

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SN74LS21D 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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SN74LS21D Alternates

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Image Part Number Model
Part Image HD74LS21RP Hitachi Ltd

AND Gate, LS Series, 2-Func, 4-Input, TTL, PDSO14

Part Image HD74LS21RP-EL Renesas Electronics Corporation

AND Gate, LS Series, 2-Func, 4-Input, TTL, PDSO14

Part Image HD74LS21RP Renesas Electronics Corporation

AND Gate, LS Series, 2-Func, 4-Input, TTL, PDSO14

Part Image DM74LS21M Texas Instruments

AND Gate, LS Series, 2-Func, 4-Input, TTL, PDSO14

Part Image DM74LS21MX Texas Instruments

AND Gate, LS Series, 2-Func, 4-Input, TTL, PDSO14

For a full list of alternate parts for SN74LS21D, check out Findchips.com