PCA9546APWTG4
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Texas Instruments PCA9546APWTG4

Manufacturer No:
PCA9546APWTG4
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC INTERFACE SPECIALIZED 16TSSOP
Delivery:
Payment:
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Product Introduction

Overview

The PCA9546APWTG4, produced by Texas Instruments, is a 4-channel, bidirectional translating switch designed for I2C and SMBus applications. This device is particularly useful in systems where multiple I2C or SMBus devices need to be connected to a single master controller, and it supports both Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation. The PCA9546A allows for voltage-level translation between different bus voltages, enabling communication between devices operating at different voltage levels such as 1.8-V, 2.5-V, 3.3-V, and 5-V without additional protection.

Key Specifications

Parameter Value Unit
Operating Power-Supply Voltage Range 2.3 to 5.5 V
Input Voltage Tolerance -0.5 to 7 V
Clock Frequency Range 0 to 400 kHz
Operating Free-Air Temperature Range -40 to 85 °C
Package Types TSSOP, SOIC, TVSOP, DW, PW, VQFN
Address Pins Three (allowing up to eight devices on the I2C bus)
Switch Channels Four bidirectional translating switches
Reset Input Active-low reset input
Standby Current Low standby current
ESD Protection Exceeds JESD 22 - 2000-V Human-Body Model

Key Features

  • I2C Bus and SMBus compatible
  • 1-of-4 bidirectional translating switches
  • Active-low reset input
  • Three address pins, allowing up to eight devices on the I2C bus
  • Channel selection via I2C Bus, in any combination
  • Power-up with all switch 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
  • 5.5 V tolerant inputs
  • Latch-up performance exceeds 100 mA Per JESD 78

Applications

The PCA9546APWTG4 is suitable for various applications where multiple I2C or SMBus devices need to be managed by a single master controller. This includes:

  • Embedded systems requiring multiple I2C or SMBus peripherals
  • Industrial automation systems with multiple sensors and actuators
  • Consumer electronics such as smart home devices and appliances
  • Automotive systems with multiple I2C or SMBus interfaces
  • Medical devices requiring multiple sensor and actuator control

Q & A

  1. What is the primary function of the PCA9546APWTG4?

    The PCA9546APWTG4 is a 4-channel, bidirectional translating switch for I2C and SMBus applications, allowing multiple devices to be connected to a single master controller.

  2. What voltage levels does the PCA9546APWTG4 support for voltage translation?

    The device supports voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses.

  3. How many devices can be connected on the I2C bus using the PCA9546APWTG4?

    Up to eight PCA9546APWTG4 devices can be connected on the I2C bus due to the three address pins.

  4. What is the purpose of the active-low reset input?

    The active-low reset input allows the device to recover from a fault state by resetting the I2C state machine and deselecting all channels.

  5. What is the clock frequency range supported by the PCA9546APWTG4?

    The device supports a clock frequency range of 0 to 400 kHz.

  6. Is the PCA9546APWTG4 tolerant to high input voltages?

    Yes, the device has 5.5 V tolerant inputs.

  7. Does the PCA9546APWTG4 support hot insertion?

    Yes, the device supports hot insertion.

  8. What is the operating free-air temperature range of the PCA9546APWTG4?

    The operating free-air temperature range is -40 to 85 °C.

  9. What types of packages are available for the PCA9546APWTG4?

    The device is available in TSSOP, SOIC, TVSOP, DW, PW, and VQFN packages.

  10. Does the PCA9546APWTG4 have any ESD protection features?

    Yes, the device exceeds JESD 22 - 2000-V Human-Body Model for ESD protection.

Product Attributes

Applications:Translating Switch
Interface:I²C, SMBus
Voltage - Supply:2.3V ~ 5.5V
Package / Case:16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:16-TSSOP
Mounting Type:Surface Mount
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Similar Products

Part Number PCA9546APWTG4 PCA9546APWG4 PCA9546APWRG4
Manufacturer Texas Instruments Texas Instruments Texas Instruments
Product Status Last Time Buy Active Discontinued at Digi-Key
Applications Translating Switch Translating Switch Translating Switch
Interface I²C, SMBus I²C, SMBus I²C, SMBus
Voltage - Supply 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V
Package / Case 16-TSSOP (0.173", 4.40mm Width) 16-TSSOP (0.173", 4.40mm Width) 16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 16-TSSOP 16-TSSOP 16-TSSOP
Mounting Type Surface Mount Surface Mount Surface Mount

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