NXP  PCA9546APW,112  Specialized Interface, I2C, SMBus, 2.3 V, 5.5 V, TSSOP, 16 Pins

NXP PCA9546APW,112
Technical Data Sheet (266.83KB) EN See all Technical Docs

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Product Overview

The PCA9546APW,112 is a 4-channel I²C-bus switch with reset and quad bidirectional Translating Switch controlled via the I²C-bus. The SCL/SDA upstream pair fans out to four downstream pairs or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. An active LOW reset input allows the PCA9546A to recover from a situation where one of the downstream I²C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I²C-bus state machine and causes all the channels to be deselected as does the internal power-on reset (POR) function. The pass gates of the switch are constructed such that the VDD pin can be used to limit the maximum high voltage which is passed by the PCA9546A. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5V tolerant.
  • Power-up with all switch channels deselected
  • Low Ron switches
  • No glitch on power-up
  • Supports hot insertion
  • Low standby current consumption
  • Latch-up testing is done to JEDEC standard JESD78 which exceeds 100mA


Product Information

IC Interface Type:
I2C, SMBus
Interface Applications:
Supply Voltage Min:
Supply Voltage Max:
Interface Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualifications Standard:
MSL 1 - Unlimited
No SVHC (17-Dec-2015)

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Legislation and Environmental

Moisture Sensitivity Level:
MSL 1 - Unlimited
Product Traceability
RoHS Compliant:
Authorized Distributor


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