DESCRIPTION
●The DS2480 is a serial port to 1–Wire interface chip that supports standard and Overdrive speeds. It connects
●directly to UARTs and 5V RS232 systems. Interfacing to RS232C (±12V levels) requires a passive clamping circuit and one 5V to ±12V level translator. Internal timers relieve the host of the burden of generating the time–critical 1–Wire communication waveforms.
●FEATURES
●•Universal, common–ground serial port to 1–WireTM line driver for MicroLANTM applications
●•Works with all iButtons and MicroLAN–compatible 1–Wire slave devices
●•Communicates at regular and Overdrive 1–Wire speed and serial port data rates of 9600 (default), 19200, 57600 and 115200 bps
●•Supports 12V EPROM programming and stiff 5V pull–up for Crypto iButton, sensors and EEPROM
●•Self–calibrating time base with ±5% tolerance for serial and 1–Wire communication
●•Slew rate controlled 1–Wire pull–down and active pull–up to accommodate long lines and reduce radiation
●•User–selectable RXD/TXD polarity minimizes component count when interfacing to 5V based RS232 systems or directly to UARTs
●•Programmable 1–Wire timing and driver characteris tics accommodate a wide range of MicroLAN configurations at regular speed
●•Smart protocol combines data and control information without requiring extra pins
●•Compatible to optical, IR and RF to RS232 converters
●•Low cost 8–pin SOIC surface mount package
●•Operates over 4.5V to 5.5V from –40°C to +85°C
