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SN74HC191DT - Texas Instruments

Description: Counter ICs 4-Bit Synch Up/Down Binary Counter

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SN74HC191DT - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D (R-PDSO-G16)
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SN74HC191DT - Texas Instruments  - 3D model - Small Outline Packages - D (R-PDSO-G16)
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SN74HC191DT Details

  • Manufacturer Part Number:

    SN74HC191DT

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Pin Count:

    16

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Additional Feature:

    RCO OUTPUT

  • Count Direction:

    BIDIRECTIONAL

  • Family:

    HC/UH

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    9.9 mm

  • Load Capacitance (CL):

    50 pF

  • Load/Preset Input:

    YES

  • Logic IC Type:

    BINARY COUNTER

  • Max Frequency@Nom-Sup:

    17000000 Hz

  • Max I(ol):

    0.0052 A

  • Mode of Operation:

    SYNCHRONOUS

  • Moisture Sensitivity Level:

    1

  • Number of Bits:

    4

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • 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):

    0.08 mA

  • Prop. Delay@Nom-Sup:

    41 ns

  • Propagation Delay (tpd):

    240 ns

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Voltage-Max (Vsup):

    6 V

  • Supply Voltage-Min (Vsup):

    2 V

  • Supply Voltage-Nom (Vsup):

    5 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    INDUSTRIAL

  • 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:

    POSITIVE EDGE

  • Width:

    3.9 mm

  • fmax-Min:

    19 MHz

SN74HC191DT Frequently Asked Questions (FAQs)

  • The maximum clock frequency of the SN74HC191DT is 30 MHz, but it can vary depending on the operating voltage and load capacitance. It's recommended to check the timing characteristics in the datasheet for specific frequency limits.
  • To ensure proper reset, connect the MR (Master Reset) pin to a pull-up resistor and a capacitor to ground. This will ensure that the device is reset during power-up and holds the reset state until the capacitor is fully charged.
  • The recommended operating voltage range for the SN74HC191DT is 2V to 6V, with a typical operating voltage of 5V. Operating the device outside of this range may affect its performance and reliability.
  • Yes, the SN74HC191DT can be used in a 3.3V system, but the output voltage will be limited to 3.3V. Additionally, the device's performance and timing characteristics may be affected at lower operating voltages.
  • The asynchronous clear input (CLR) should be synchronized with the clock signal to avoid metastability issues. It's recommended to use a flip-flop or a synchronizer circuit to synchronize the CLR signal with the clock signal.

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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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