I2C-bus utilized on several meters of nodes describe and applied in this app note from NXP Semiconductors. Link here (PDF) The availability of powerful I2C-bus buffers that drive their I/Os on both sides to a nominal ground or ‘zero offset’ logic level allows the removal of noise introduced into one section of a very large […]
Tag Archives: I2C bus
App note: Level shifting techniques in I2C-bus design
Level shifting techniques in I2C-bus design from NXP, app note here (PDF): Logic level shifting may be required when interfacing legacy devices with newer devices that use a smaller geometry process.For bidirectional bus systems like the I2C-bus, such a level shifter must also be bidirectional, without the need of a direction control signal. The simplest […]
MCP23017 Breakout board
Jesus Echavarria has written a detailed article about his MCP23017 Brekout Board: I develop this MCP23017 Brekout Board to interface a 2×16 LCD display with any microcontroller using a standard I2C bus. Typical 2×16 displays needs at least 6 lines to work (when working in 4-byte mode); in some cases, this will be prohibited for […]
App Note: Analog switch multiplexes SFP modules
rsdio writes: There is probably a way to implement this circuit with any analog mux instead of the Maxim part… Analog Switch Multiplexes SFP Modules To avoid multiple I²C bus masters in a telecom or data-communications system with SFP modules, add an analog multiplexer (MAX4572) that directs the data line to the appropriate SFP module.