PCA9846PWJ

The PCA9846PWJ from NXP Semiconductors is an ultra-low voltage, quad bidirectional translating switch designed for I2C-bus communication. It features a single upstream SCL/SDA pair that fans out to four downstream pairs, allowing for flexible channel selection via a programmable control register. This enables multiple devices with the same I2C-bus address to coexist on the same bus and helps separate heavily loaded I2C-bus segments.

This switch supports voltage level translation between 0.8 V, 1.8 V, 2.5 V, and 3.3 V buses, making it suitable for interfacing next-generation CPUs and other low-voltage components. All I/O pins are 3.6 V tolerant. The device includes an active LOW reset input for recovery from bus issues and a Power-On Reset (POR) function. It operates over a temperature range of -40°C to 85°C.

The PCA9846PWJ is available in a 16-TSSOP package and is designed for surface mount applications. Its features include low ON-resistance switches, support for hot insertion due to all channels being deselected at power-on, and an I2C Device ID function. The switch operates with a clock frequency range of 0 Hz to 1 MHz.