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The DS2480B is a serial port to 1-Wire interface chip that supports regular 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.
* Universal, Common-Ground Serial Port to 1-Wire Line Driver for MicroLAN 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 Pullup for Crypto iButton, Sensors and EEPROM * Load Sensor to Terminate the Stiff Pullup as the Energy Demand of the Crypto iButton Drops * Self-Calibrating Time Base with +/-5% Tolerance for Serial and 1-Wire Communication * Slew Rate Controlled 1-Wire Pulldown and Active Pullup 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 Characteristics Accommodate a Wide Range of MicroLAN Configurations at Regular Speed * Smart Protocol Combines Data and Control Information Without Requiring Extra Pins * Compatible with Optical, IR, and RF to RS232 Converters * Low-Cost 8-Pin SO Surface-Mount Package * Operates Over 4.5V to 5.5V from -40C to +85C