PCA9544APW
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NXP USA Inc. PCA9544APW

Manufacturer No:
PCA9544APW
Manufacturer:
NXP USA Inc.
Package:
Bulk
Description:
PCA9544A 4-CHANNEL I2C AND SMBUS
Delivery:
Payment:
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Product Introduction

Overview

The PCA9544APW,118 from NXP USA Inc. is a 1-of-4 bidirectional translating multiplexer controlled via the I2C-bus. This device is designed to fan out the SCL/SDA upstream pair to four SCx/SDx downstream pairs or channels, with only one channel selected at a time based on the contents of the programmable control register. It features a power-on reset function that initializes the registers and the I2C-bus state machine with no channels selected, ensuring a clean startup. The multiplexer allows for voltage level translation between different bus voltages, enabling communication between 1.8 V, 2.5 V, 3.3 V, and 5 V parts without additional protection.

Key Specifications

Parameter Value
Interface Type I2C
No of Channels 4
Clock Frequency-Max 400 kHz
Supply Voltage-Nom 2.3 V to 5.5 V
Supply Current ±100mA
Package Style TSSOP-20
Mounting Method Surface Mount
Address Pins 3 (allowing up to 8 devices on the I2C-bus)
Interrupt Inputs 4 active LOW
Interrupt Output 1 active LOW
I/O Pin Tolerance 5 V tolerant

Key Features

  • 1-of-4 bidirectional translating multiplexer
  • I2C-bus interface logic; compatible with SMBus
  • 4 active LOW interrupt inputs and 1 active LOW interrupt output
  • 3 address pins allowing up to 8 devices on the I2C-bus
  • Channel selection via I2C-bus
  • Power-up with all multiplexer channels deselected
  • Low Ron switches
  • Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
  • No glitch on power-up
  • Supports hot insertion
  • Low standby current
  • ESD protection exceeds 2000 V HBM, 200 V MM, and 1000 V CDM
  • Latch-up testing exceeds 100 mA per JEDEC Standard JESD78

Applications

The PCA9544APW,118 is suitable for various applications requiring I2C-bus multiplexing and voltage level translation. These include:

  • Embedded systems where multiple I2C devices need to be connected to a single I2C bus.
  • Industrial control systems that require communication between devices operating at different voltage levels.
  • Automotive systems where robust and reliable I2C communication is crucial.
  • Consumer electronics such as smart home devices and IoT applications.

Q & A

  1. What is the PCA9544APW,118?

    The PCA9544APW,118 is a 1-of-4 bidirectional translating multiplexer controlled via the I2C-bus, designed for voltage level translation and multiplexing.

  2. What is the maximum clock frequency of the PCA9544APW,118?

    The maximum clock frequency is 400 kHz.

  3. What is the supply voltage range for the PCA9544APW,118?

    The supply voltage range is from 2.3 V to 5.5 V.

  4. How many interrupt inputs and outputs does the PCA9544APW,118 have?

    It has 4 active LOW interrupt inputs and 1 active LOW interrupt output.

  5. Is the PCA9544APW,118 compatible with SMBus?

    Yes, it is compatible with SMBus.

  6. What is the package style of the PCA9544APW,118?

    The package style is TSSOP-20.

  7. Does the PCA9544APW,118 support hot insertion?

    Yes, it supports hot insertion.

  8. What is the purpose of the power-on reset function in the PCA9544APW,118?

    The power-on reset function initializes the registers and the I2C-bus state machine with no channels selected.

  9. Can the PCA9544APW,118 handle different bus voltages on each channel?

    Yes, it allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.

  10. Is the PCA9544APW,118 ESD protected?

    Yes, it has ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.

Product Attributes

Applications:Translating Switch
Interface:I²C, SMBus
Voltage - Supply:2.3V ~ 5.5V
Package / Case:20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:20-TSSOP
Mounting Type:Surface Mount
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Similar Products

Part Number PCA9544APW PCA9546APW PCA9545APW PCA9544APWR PCA9544APWT PCA9548APW PCA9543APW PCA9544ADW
Manufacturer NXP USA Inc. Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Obsolete Obsolete Active Last Time Buy Obsolete Obsolete Active
Applications Translating Switch Translating Switch Translating Switch Translating Switch Translating Switch Translating Switch Translating Switch Translating Switch
Interface I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus I²C I²C, SMBus
Voltage - Supply 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V
Package / Case 20-TSSOP (0.173", 4.40mm Width) 16-TSSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width) 24-TSSOP (0.173", 4.40mm Width) 14-TSSOP (0.173", 4.40mm Width) 20-SOIC (0.295", 7.50mm Width)
Supplier Device Package 20-TSSOP 16-TSSOP 20-TSSOP 20-TSSOP 20-TSSOP 24-TSSOP 14-TSSOP 20-SOIC
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount

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