P82B96TD/S900,118

The P82B96TD/S900,118 from NXP Semiconductors is a dual bidirectional bus buffer IC that provides a logic interface between I2C-buses and other bus configurations with different voltage and current levels. It is suitable for interfacing with SMBus, 3.3V logic devices, and 15V levels, enhancing noise immunity on longer bus lengths.

This device supports bidirectional data transfer for I2C-bus signals without restrictions on normal I2C-bus protocols or clock speed. It isolates capacitance, allowing up to 400 pF on the Sx/Sy side and 4000 pF on the Tx/Ty side. The Tx/Ty outputs offer a 60 mA sink capability for driving low-impedance or high capacitive buses. It operates at 400 kHz over distances of at least 20 meters.

The P82B96TD/S900,118 operates with a supply voltage range of 2V to 15V, with I2C-bus logic levels on the Sx/Sy side being independent of the supply voltage. It splits I2C-bus signals into forward/reverse Tx/Rx and Ty/Ry pairs for interfacing with opto-electrical isolators and similar devices requiring unidirectional signal paths. The IC features low power supply current and ESD protection exceeding 3500V HBM and 1000V CDM.

Packaged in an 8-SOIC (0.154", 3.90mm Width) surface mount package, this bus buffer is designed for applications requiring interface between I2C-buses operating at different logic levels or between I2C-bus and SMBus standards. It is also useful for converting I2C-bus SDA or SCL signals to multi-drop differential bus hardware.