NXP Semiconductors PCA9848BS

The PCA9848 is an ultra-low voltage, octal bidirectional translating switch controlled via the I²C-bus. The SCL/ SDA upstream pair fans out to eight downstream pairs, or channels. Any or all SCx/SDx channels can be selected, determined by the programmable control register. This feature allows multiple devices with the same I²C-bus address to reside on the same bus. The switch device can also separate a heavily loaded I²C-bus into separate bus segments, eliminating the need for a bus buffer.

An active LOW reset input allows the PCA9848 to recover from a situation where one of the downstream I²C buses is stuck in a LOW state.

Key features

• Low voltage/Wide supply range (compare to others)
• Octal bi-directional switch with voltage translation
• Robustness features
• Operating temperature range from -40 ⁰C to +85 ⁰C (TSSOP24) and up to +125 ⁰C (HVQFN24)

Additional features

• Ultra-low voltage operation, down to 0.8 V to interface with next-generation CPUs
• Allows voltage level translation between 0.8 V, 1.8 V, 2.5 V and 3.3 V buses
• 0.8 V (-40 °C to +85 °C)
• 0.9 V (-40 °C to +125 °C)
• Two address pins allow up to 16 devices on the 1 MHz I2C-bus
• Two ways to reset
• Active LOW reset input
• Reset via I2C-bus software command
• Low standby current
• Robustness Features
• ESD protection exceeds 6000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
• 3.6 V tolerant inputs
• Supports hot insertion since all channels are de-selected at power-on

Applications

• Factory automation
• Building automation
• Test and measurement equipment
• Routers
• Handset radios
• Serial transceiver comms module
• Servers