P82B715 I2c bus extender

The P82B715 is a bipolar IC intended for application in I2C-bus and derivative bus. systems. While retaining all the operating modes and features of the I2C-bus it permits extension of the practical separation distance between components on the I2C-bus by buffering both the data (SDA) and the clock (SCL) lines.

So basically with this chip and a couple of pull-up resistors you can extend your I2C bus at least 10x the normal length. Easily create star or multi-drop buses to extend your I2C network.

Features:

Dual, bidirectional, unity voltage gain buffer with no external directional control required

Compatible with I2C-bus and its derivatives SMBus, PMBus, DDC, etc.

Logic signal levels may include (but not exceed) both supply and ground

Logic signal input voltage levels are output without change and are independent of VCC

x10 impedance transformation, but does not change logic voltage levels

Supply voltage range 3 V to 12 V

Clock speeds to at least 100 kHz and 400 kHz when other system delays permit

ESD protection exceeds 2500 V HBM per Mil. Std 883C-3015.7 and 400 V MM per JESD22-A115 (I/Os have diodes to VCC and GND)

Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

Docs:

Datasheet

Breakout board available soon. This board will enable easy remote I2C bus extensions with standard cat-5 cable. With RJ-45 connector, breakouts for unused cable pairs, option for providing remote power and selectable bus pull-up resistors.