TCA9546APWR
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Texas Instruments TCA9546APWR

Manufacturer No:
TCA9546APWR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC BUS SWITCH 2 X 1:4 16TSSOP
Delivery:
Payment:
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Product Introduction

Overview

The TCA9546APWR, produced by Texas Instruments, is a 4-channel, bidirectional translating switch designed for I2C and SMBus applications. This device allows a single I2C bus to be expanded into four separate channels, enabling communication with multiple I2C slaves from a single master. The TCA9546A supports voltage-level translation between different bus voltages, such as 1.8-V, 2.5-V, 3.3-V, and 5-V, making it versatile for various system configurations. It also features an active-low reset input and internal power-on reset functionality to manage and recover from fault conditions on the I2C bus.

Key Specifications

ParameterValue
PackageTSSOP (PW) with 16 pins
Operating Temperature Range-40°C to 85°C
Operating Power-Supply Voltage Range1.65 V to 5.5 V
Clock Frequency0 to 400 kHz
Input Tolerance5.5 V tolerant inputs
ESD Protection4000-V Human-body model, 1500-V Charged-device model
Latch-up PerformanceExceeds 100 mA per JESD 78

Key Features

  • 1-of-4 Bidirectional translating switches
  • I2C Bus and SMBus compatible
  • Active-low reset input
  • Three address pins, allowing up to eight TCA9546A devices on the I2C bus
  • Channel selection via I2C Bus, in any combination
  • Power-up with all switch channels deselected
  • Low RON switches
  • 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

Applications

The TCA9546APWR is suitable for a variety of applications where multiple I2C devices need to be connected to a single I2C master. This includes industrial automation, medical devices, consumer electronics, and automotive systems. It is particularly useful in scenarios where different voltage levels are present and need to be translated, ensuring seamless communication between devices operating at different voltages.

Q & A

  1. What is the primary function of the TCA9546APWR?
    The primary function of the TCA9546APWR is to act as a 4-channel, bidirectional translating switch for I2C and SMBus applications, allowing a single I2C bus to be expanded into four separate channels.
  2. What is the operating voltage range of the TCA9546APWR?
    The operating power-supply voltage range of the TCA9546APWR is from 1.65 V to 5.5 V.
  3. What is the maximum clock frequency supported by the TCA9546APWR?
    The TCA9546APWR supports clock frequencies up to 400 kHz.
  4. Does the TCA9546APWR support voltage-level translation?
    Yes, the TCA9546APWR supports voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses.
  5. What is the purpose of the active-low reset input on the TCA9546APWR?
    The active-low reset input allows the device to recover from a situation where one of the downstream I2C buses is stuck in a low state.
  6. How many TCA9546A devices can be connected on a single I2C bus?
    Up to eight TCA9546A devices can be connected on a single I2C bus using the three address pins.
  7. Is the TCA9546APWR tolerant to high input voltages?
    Yes, the TCA9546APWR has 5.5 V tolerant inputs.
  8. What is the ESD protection level of the TCA9546APWR?
    The TCA9546APWR has ESD protection exceeding 4000-V Human-body model and 1500-V Charged-device model.
  9. Does the TCA9546APWR support hot insertion?
    Yes, the TCA9546APWR supports hot insertion.
  10. What is the typical application of the TCA9546APWR?
    The TCA9546APWR is typically used in applications such as industrial automation, medical devices, consumer electronics, and automotive systems where multiple I2C devices need to be connected to a single I2C master.

Product Attributes

Type:Bus Switch
Circuit:2 x 1:4
Independent Circuits:1
Current - Output High, Low:- 
Voltage Supply Source:Single Supply
Voltage - Supply:1.65V ~ 5.5V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:16-TSSOP
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Similar Products

Part Number TCA9546APWR TCA9548APWR TCA9543APWR TCA9544APWR TCA9545APWR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active Active
Type Bus Switch Bus Switch Bus Switch Multiplexer Bus Switch
Circuit 2 x 1:4 1 x 8:1 2 x 1:2 1 x 1:4 2 x 1:4
Independent Circuits 1 1 1 1 1
Current - Output High, Low - - - - -
Voltage Supply Source Single Supply Single Supply Single Supply Single Supply Single Supply
Voltage - Supply 1.65V ~ 5.5V 1.65V ~ 5.5V 1.65V ~ 5.5V 1.65V ~ 5.5V 1.65V ~ 5.5V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-TSSOP (0.173", 4.40mm Width) 24-TSSOP (0.173", 4.40mm Width) 14-TSSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 16-TSSOP 24-TSSOP 14-TSSOP 20-TSSOP 20-TSSOP

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