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SN74LS148NE4 - Texas Instruments

Description: Encoders, Decoders, Multiplexers & Demultiplexers 8-line to 3-line Priority encoder

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SN74LS148NE4 - Texas Instruments - PCB symbol
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PCB Footprints
SN74LS148NE4 - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - N (R-PDIP-T16)
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SN74LS148NE4 - Texas Instruments - 3D model - Dual-In-Line Packages - N (R-PDIP-T16)
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SN74LS148NE4 Details

  • Manufacturer Part Number:

    SN74LS148NE4

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    DIP

  • Package Description:

    DIP-16

  • Pin Count:

    16

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Additional Feature:

    8 TO 3 LINE PRIORITY ENCODER; CASCADABLE; WITH GROUP SELECT OUTPUT

  • Family:

    LS

  • JESD-30 Code:

    R-PDIP-T16

  • JESD-609 Code:

    e4

  • Length:

    19.305 mm

  • Load Capacitance (CL):

    15 pF

  • Logic IC Type:

    ENCODER

  • Number of Bits:

    8

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Polarity:

    INVERTED

  • 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):

    20 mA

  • Propagation Delay (tpd):

    36 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

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

SN74LS148NE4 Frequently Asked Questions (FAQs)

  • The maximum clock frequency for the SN74LS148NE4 is typically around 10 MHz, but it can vary depending on the specific application and operating conditions.
  • The enable input (EI) is an active-low input that enables or disables the encoder output. When EI is low, the encoder output is enabled, and when it is high, the output is disabled. You can tie EI to GND or VCC depending on your design requirements.
  • The recommended power-on reset sequence for the SN74LS148NE4 is to apply power to the device while holding the enable input (EI) high. This allows the device to initialize and settle before enabling the encoder output.
  • The SN74LS148NE4 is a 5V device, but it can be used with a 3.3V supply voltage with some limitations. However, the output voltage levels may not be compatible with 3.3V logic, and the device's performance may be degraded. It is recommended to use a level translator or a voltage regulator to ensure compatibility.
  • To ensure proper synchronization, you should use a clock signal that is synchronized with your system clock to clock the encoder. You can also use a flip-flop or a synchronizer circuit to synchronize the encoder output with your system clock.

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SN74LS148NE4 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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SN74LS148NE4 Alternates

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For a full list of alternate parts for SN74LS148NE4, check out Findchips.com