Technical Specifications

Brand:

NXP

Case/Package:

TSSOP

Number of Pins:

Max Operating Temperature:

85 °C

Max Supply Voltage:

5.5 V

Min Operating Temperature:

-25 °C

Min Supply Voltage:

2.3 V

Operating Supply Voltage:

2.5 V

Interface:

I2C, SMBus

Ambient Temperature Range High:

85 °C

Max Frequency:

400 kHz

Max Junction Temperature (Tj):

125 °C

Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.

Description

The PCA9548A is an octal bidirectional translating switch controlled by the I²C bus. The SCL/SDA upstream pair spreads out to eight downstream pairs, or channels. Individual SCx/SDx channels or combinations of channels can be selected based on the contents of the programmable control register. The PCA9548A has an active LOW reset input, allowing it to recover from a trapped LOW state on a downstream I²C bus. To reset the I²C-bus state machine and deselect all channels, pull the RESET pin LOW, as well as use the internal Power-on reset mechanism. The switches' pass gates are designed so that the VDD pin can be utilized to limit the maximum high voltage passed by the PCA9548A. This enables the use of multiple bus voltages on each pair, allowing 1.8 V, 2.5 V, or 3.3 V parts to communicate with 5 V parts without requiring additional safety. External pull-up resistors bring the bus voltage up to the necessary level for each channel. All I/O pins can tolerate 6 V.

Datasheet