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SN74LS90DR - Texas Instruments

Description: Decade Counter

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SN74LS90DR - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D
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SN74LS90DR Details

  • Manufacturer Part Number:

    SN74LS90DR

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    14

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    ONE FUNCTION HAS 1 BIT

  • Count Direction:

    UP

  • Family:

    LS

  • JESD-30 Code:

    R-PDSO-G14

  • JESD-609 Code:

    e4

  • Length:

    8.65 mm

  • Load Capacitance (CL):

    15 pF

  • Load/Preset Input:

    NO

  • Logic IC Type:

    DECADE COUNTER

  • Max Frequency@Nom-Sup:

    16000000 Hz

  • Max I(ol):

    0.008 A

  • Mode of Operation:

    ASYNCHRONOUS

  • Moisture Sensitivity Level:

    1

  • Number of Bits:

    4

  • Number of Functions:

    1

  • Number of Terminals:

    14

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP14,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    TR

  • Peak Reflow Temperature (Cel):

    260

  • Power Supply Current-Max (ICC):

    15 mA

  • Prop. Delay@Nom-Sup:

    50 ns

  • Propagation Delay (tpd):

    50 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

  • Trigger Type:

    NEGATIVE EDGE

  • Width:

    3.9 mm

  • fmax-Min:

    32 MHz

SN74LS90DR Frequently Asked Questions (FAQs)

  • The maximum clock frequency of the SN74LS90DR is 2.5 MHz, but it can vary depending on the specific application and operating conditions.
  • The SN74LS90DR requires a single 5V power supply, and it's essential to ensure that the power supply is clean and stable. A decoupling capacitor of 0.1 μF to 1 μF should be placed close to the device to filter out noise and voltage spikes.
  • The SN74LS90DR can sink or source up to 16 mA of current per output pin, but it's recommended to limit the current to 10 mA or less to ensure reliable operation.
  • The asynchronous reset input (R) should be tied to VCC through a pull-up resistor (typically 1 kΩ to 10 kΩ) to ensure that the device is properly reset. A capacitor (typically 10 nF to 100 nF) can be added in parallel to the resistor to filter out noise.
  • To minimize noise and signal degradation, it's recommended to keep the clock signal traces short and away from other signals. Use a ground plane or a power plane to reduce noise and ensure that the device is properly decoupled.

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SN74LS90DR 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 DM74LS90MX Fairchild Semiconductor Corporation

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For a full list of alternate parts for SN74LS90DR, check out Findchips.com