NXP Semiconductors 82B715
The 82B715 is a bipolar integrated circuit intended for application in I2C bus systems. The bus capacitance limit of 400pF restricts practical communication distances to a few meters. Block Diagram: 82B715 1998 Jan 09 3 Philips Semiconductors Preliminary specification I2C bus extender 82B715 FUNCTIONAL DESCRIPTION The 82B715 bipolar integrated circuit contains two identical buffer circuits which enable I2C and similar bus systems to be extended over long distances without...DESCRIPTION
While retaining all the operating modes and features of the system 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. Using one 82B715 at each end of longer cables reduces the cable loading capacitance on the I2C bus by a factor of 10 times and may allow the use of low cost general purpose wiring to extend bus lengths. I2C I2C PIN CONFIGURATIONS 8-Pin Dual In-Line or SO 82B715 N.C. 1 LX SX GND 2 3 4 8 7 6 5 VCC LY SY N.C. SU00290 PINNINGFEATURES
PIN 1 2 3 4 5 6 7 8 SYMBOL N.C. LX SX GND N.C. SY LY VCC FUNCTION Buffered Bus, LDA or LCL I2C Bus, SDA or SCL Negative Supply I2C Bus, SCL or SDA Buffered Bus, LCL or LDA Positive Supply● Dual, bi-directional, unity voltage gain buffer
● I2C bus compatible
● Logic signal levels may include both supply and ground
● X10 impedance transformation
● Wide supply voltage range QUICK REFERENCE DATA LIMITS SYMBOL VCC ICC Iline Vin Vout Zin...