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TCA9543ADR The Texas Instruments TCA9543ADR is a 2-channel I2C/SMBus switch designed for voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses. It operates from a 1.65V to 5.5V supply.
Mfr Part #:

TCA9543ADR

Available from 4 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments TCA9543ADR is a 2-channel I2C/SMBus switch designed for voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses. It operates from a 1.65V to 5.5V supply.
✓ Total Stock: 67,544 pcs
$ Price Range: $0.40

TCA9543ADR Available from 4 distributors

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✓ Non-Authorised
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Romaks Technologies ✓
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60,267 pcs
On Request
60267 pcs On Request 1 On Request On Request On Request On Request On Request
Optech Co.,Limited ✓
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2,869 pcs
On Request
2869 pcs On Request 1 On Request On Request 1431+ On Request On Request
Xingangxin ✓
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2,764 pcs
On Request
2764 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
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1,644 pcs
On Request
1644 pcs On Request 1 On Request On Request 1431+ On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

TCA9543ADR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Circuit
Frequency
Independent Circuits
Mounting Type
Number of Channels
Operating Temperature
Operating Voltage
SVHC Present
Supplier Device Package
Supplier Package
Type
Voltage
Voltage Supply Source
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TCA9543ADR Description

Short technical summary and product information.

The TCA9543ADR from Texas Instruments is a dual bidirectional translating switch controlled by the I2C bus. This device features two channels, allowing for a 2 x 1:2 configuration, and supports a wide operating supply voltage range of 1.65V to 5.5V. It is designed for I2C and SMBus compatibility and includes features such as active-low interrupt inputs and an active-low reset input.

 

The switch supports clock frequencies up to 400 kHz and offers voltage-level translation capabilities between common logic levels including 1.8V, 2.5V, 3.3V, and 5V buses. The TCA9543ADR is suitable for applications requiring multiple I2C buses or the isolation of bus segments. It operates within an industrial temperature range of -40°C to 85°C.

 

Packaged in a 14-SOIC (0.154", 3.90mm Width) surface-mount format, the TCA9543ADR is designed for ease of integration into various electronic designs. Its low ON-resistance switches and no-glitch power-up feature contribute to reliable system operation. The device also supports hot insertion, making it flexible for system configurations.

TCA9543ADR Quick Information

Product Type: Bus Switch
Canonical Name: TCA9543A 2-Channel I2C/SMBus Switch
Subcategory: Bus Switches

TCA9543ADR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

TCA9543ADR Estimated Pricing

Qty Low High
1+ $0.40 $0.40

Estimated market price range - modelled values for guidance only, not live distributor offers.

TCA9543ADR Features

  • Dual bidirectional translating I2C/SMBus switch.
  • Supports 1.65V to 5.5V operating voltage.
  • Enables voltage-level translation between buses.
  • Operates at up to 400 kHz clock frequency.
  • Surface mount 14-SOIC package.

TCA9543ADR Applications

  • Extends I2C bus capacity.
  • Isolates different I2C segments.
  • Facilitates voltage level translation.
  • Used in systems with multiple MCUs.
  • Supports mixed voltage bus designs.

TCA9543ADR FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating supply voltage range of the TCA9543ADR?

The TCA9543ADR operates from a single supply voltage between 1.65V and 5.5V.

What is the operating temperature range of the TCA9543ADR?

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

What package is the TCA9543ADR available in?

The TCA9543ADR comes in a 14-SOIC surface-mount package.

What is the maximum frequency of the TCA9543ADR?

The maximum frequency is 400 kHz.

How many channels does the TCA9543ADR have?

The TCA9543ADR has 2 channels configured as a 2 x 1:2 circuit.

What type of device is the TCA9543ADR?

It is a bus switch with a single supply voltage source.

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