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Participating products are available for a minimum of 10 years. Designated participating products developed for the automotive, telecom and medical segments are available for a minimum of 15 years.
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The PCA9546A is a 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 switches are constructed such that the VDD pin can be used to limit the maximum high voltage which is passed by the PCA9546A. This allows the use of different bus voltages on each pair, so that 1.8 V or 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 pins are 5 V tolerant.
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Participating products are available for a minimum of 10 years. Designated participating products developed for the automotive, telecom and medical segments are available for a minimum of 15 years.
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Part | Order | CAD Model | Status | Budgetary Price excluding tax | Interrupt | Operating Temperature (°C) | Reset input pin | Operating voltage (VDC) | Inputs | Outputs | No of Addresses | I2C-bus (kHz) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Active | 1K @ US$0.66 | yes | -40~85 | yes | 2.3~5.5 | 1 | 4 | 8 | 400 | |||
Active | 1K @ US$0.60 | yes | -40~85 | yes | 2.3~5.5 | 1 | 4 | 8 | 400 | |||
Active | 1K @ US$0.59 | yes | -40~85 | yes | 2.3~5.5 | 1 | 4 | 8 | 400 |
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4 design files