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SN74LS251DR - Texas Instruments

Description: 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

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SN74LS251DR - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D (R-PDSO-G16)
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SN74LS251DR - Texas Instruments  - 3D model - Small Outline Packages - D (R-PDSO-G16)
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SN74LS251DR Details

  • Manufacturer Part Number:

    SN74LS251DR

  • 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

  • Family:

    LS

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    9.9 mm

  • Load Capacitance (CL):

    5 pF

  • Logic IC Type:

    MULTIPLEXER

  • Max I(ol):

    0.008 A

  • Moisture Sensitivity Level:

    1

  • Number of Bits:

    8

  • Number of Functions:

    1

  • Number of Inputs:

    8

  • Number of Outputs:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Characteristics:

    3-STATE

  • Output Polarity:

    COMPLEMENTARY

  • 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:

    45 ns

  • Propagation Delay (tpd):

    45 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:

    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

SN74LS251DR Frequently Asked Questions (FAQs)

  • The maximum operating frequency of the SN74LS251DR is 30 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 SN74LS251DR is a 5V device, but it can be used in a 3.3V system with some limitations. The device's input voltage tolerance is 0.5V to 5.5V, so it can accept 3.3V inputs, but the output voltage will be limited to 3.3V. Additionally, the device's performance may be degraded at lower voltages.
  • To handle bus contention when using multiple SN74LS251DR devices, it is recommended to use bus buffers or transceivers with built-in bus hold or bus keepers to prevent data corruption and ensure reliable operation.
  • The recommended termination scheme for the SN74LS251DR is to use a pull-up resistor on the output lines to ensure proper signal termination and prevent signal reflection.

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SN74LS251DR 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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Part Image HD74LS251RP-EL Hitachi Ltd

Multiplexer, LS Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, TTL, PDSO16

Part Image DM74LS251M Rochester Electronics LLC

Multiplexer, LS Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, TTL, PDSO16

Part Image DM74LS251MX Rochester Electronics LLC

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Part Image SN74LS251DE4 Texas Instruments

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Part Image T74LS251M1 STMicroelectronics

Multiplexer, LS Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, TTL, PDSO16

For a full list of alternate parts for SN74LS251DR, check out Findchips.com