TCA9543ADR Part Information

Details for TCA9543ADR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

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Part Description

The TCA9543A is a dual bidirectional translating switch controlled by the I2C bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Either individual SCn/SDn channel or both channels can be selected, determined by the contents of the programmable control register. Two interrupt inputs (INT1–INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the two interrupt inputs. An active-low reset (RESET) input allows the TCA9543A to recover from a situation where one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes both of the channels to be deselected, as does the internal power-on reset function. The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the TCA9543A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O terminals are 5.5-V tolerant.

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Part Specifications

IC Interface Type I2C SMBus
Interface Applications Factory Automation Products with I2C Slave Address Conflicts Routers Servers
Supply Voltage Min 1.65V
Supply Voltage Max 5.5V
Interface Case Style SOIC
No. of Pins 14Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Phthalates Compliant Yes
RoHS Compliant

Alternative Part Descriptions

  • INTERFACE, I2C/SMBUS SWITCH, 5.5V, SOIC; IC Interface Type:I2C, SMBus; Interface Applications:Factory Automation, Products with I2C Slave Address Conflicts, Routers, Servers; Supply Voltage Min:1.65V; Supply Voltage Max:5.5V RoHS Compliant: Yes | Newark Electronics
  • 2-channel 1.65- to 5.5-V I2C/SMBus switch with interrupt, reset & voltage translation | Texas Instruments

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