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PCA9544ABS - NXP

Description: 4-channel I2C-bus multiplexer with interrupt logic

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PCA9544ABS Details

  • Manufacturer Part Number:

    PCA9544ABS

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    End Of Life

  • Part Package Code:

    QFN

  • Package Description:

    HVQCCN, LCC20,.20SQ,25

  • Pin Count:

    20

  • Reach Compliance Code:

    Compliant

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    NXP Semiconductors

  • YTEOL:

    1

  • Analog IC - Other Type:

    DIFFERENTIAL MULTIPLEXER

  • JESD-30 Code:

    S-PQCC-N20

  • JESD-609 Code:

    e4

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Channels:

    4

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • On-state Resistance-Max (Ron):

    55 Ω

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output:

    COMMON OUTPUT

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC20,.20SQ,25

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1 mm

  • Signal Current-Max:

    0.025 A

  • Supply Current-Max (Isup):

    0.03 mA

  • Supply Voltage-Max (Vsup):

    5.5 V

  • Supply Voltage-Min (Vsup):

    2.3 V

  • Supply Voltage-Nom (Vsup):

    2.5 V

  • Surface Mount:

    YES

  • Terminal Finish:

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

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.65 mm

  • Terminal Position:

    QUAD

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    5 mm

PCA9544ABS Frequently Asked Questions (FAQs)

  • The PCA9544ABS can handle I2C bus frequencies up to 400 kHz, but it's recommended to limit the frequency to 100 kHz for reliable operation.
  • No, the PCA9544ABS is designed to switch between multiple I2C buses, not multiple I2C masters. It's intended to allow a single I2C master to access multiple I2C buses.
  • To ensure correct switching, make sure to follow the recommended switching sequence in the datasheet, and use the correct control signals (SCL0, SCL1, SDA0, SDA1) to select the desired bus.
  • The PCA9544ABS can drive I2C buses with capacitances up to 400 pF, but it's recommended to keep the bus capacitance as low as possible to ensure reliable operation.
  • Yes, the PCA9544ABS is designed to support hot-swapping, but you need to ensure that the power supply to the device is stable and that the I2C bus is not active during the switching process.

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PCA9544ABS Overview

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About NXP

NXP Semiconductors is a leading manufacturer of semiconductor devices with a wide range of semiconductor solutions, including microcontrollers, sensors, connectivity solutions, power management ICs, and security solutions. These products are used in a variety of applications such as automotive, industrial automation, smart homes, mobile devices, and more. NXP Semiconductors is one of the world’s largest semiconductor companies and is headquartered in Eindhoven, the Netherlands.

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Part Image PCA9544ABS,118 NXP Semiconductors

Differential Multiplexer, 1 Func, 4 Channel, PQCC20