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SN74LS257BN - Texas Instruments

Description: Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

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SN74LS257BN - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - N (R-PDIP-T)
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SN74LS257BN - Texas Instruments  - 3D model - Dual-In-Line Packages - N (R-PDIP-T)
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SN74LS257BN Details

  • Manufacturer Part Number:

    SN74LS257BN

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Pin Count:

    16

  • Country Of Origin:

    Malaysia, Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Family:

    LS

  • JESD-30 Code:

    R-PDIP-T16

  • JESD-609 Code:

    e4

  • Length:

    19.305 mm

  • Load Capacitance (CL):

    45 pF

  • Logic IC Type:

    MULTIPLEXER

  • Max I(ol):

    0.024 A

  • Number of Bits:

    2

  • Number of Functions:

    4

  • Number of Inputs:

    2

  • Number of Outputs:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Characteristics:

    3-STATE

  • Output Polarity:

    TRUE

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP16,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Packing Method:

    TUBE

  • Power Supply Current-Max (ICC):

    18 mA

  • Prop. Delay@Nom-Sup:

    21 ns

  • Propagation Delay (tpd):

    15 ns

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.08 mm

  • Supply Voltage-Max (Vsup):

    5.25 V

  • Supply Voltage-Min (Vsup):

    4.75 V

  • Supply Voltage-Nom (Vsup):

    5 V

  • Surface Mount:

    NO

  • Technology:

    TTL

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

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

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

SN74LS257BN Frequently Asked Questions (FAQs)

  • The maximum clock frequency of the SN74LS257BN is typically 30 MHz, but it can vary depending on the specific application and operating conditions.
  • The SN74LS257BN requires a single 5V power supply, and it's essential to ensure that the power supply is clean and stable. Additionally, decoupling capacitors should be used to filter out noise and ensure reliable operation.
  • The propagation delay of the SN74LS257BN is typically around 10-15 ns, but it can vary depending on the specific application and operating conditions.
  • The SN74LS257BN is designed to operate at 5V, but it can be used in a 3.3V system with some limitations. However, the output voltage will be reduced, and the device may not operate at the same speed. It's recommended to use a level translator or a voltage regulator to ensure proper operation.
  • The enable inputs (E1 and E2) of the SN74LS257BN are active-low, meaning that the device is enabled when the inputs are low. It's essential to ensure that the enable inputs are properly driven to prevent unwanted device operation.

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SN74LS257BN 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 SN74LS257BN Rochester Electronics LLC

Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16

Part Image DM74LS257BN Rochester Electronics LLC

Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16

Part Image SN74LS257BN onsemi

Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16

Part Image T74LS257B1 STMicroelectronics

Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16

Part Image 74LS257APC Fairchild Semiconductor Corporation

Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16

For a full list of alternate parts for SN74LS257BN, check out Findchips.com