P82B715TD,118 接口-信号缓冲器、中继器

P82B715TD,118

接口-信号缓冲器、中继器 I2C BUS EXTENDER

I2C-bus extender

General description  

The P82B715TD 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.

Features P82B715TD

■ 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

■ ×10 impedance transformation, but does not change logic voltage levels

Applications P82B715TD

■ Increase the total connected capacitance of an I2C-bus system to around 3000 pF

■ Drive I2C-bus signals over long cables to approximately 50 meters or 3000 pF

■ Drives ×10 lower impedance bus wiring for improved noise immunity

■ Multi-drop distribution of I2C-bus signals using low cost twisted-pair cables

■ AdvancedTCA radial IPMB architecture

■ Driving 30 mA Fm+ devices from standard 3 mA parts