DS2480B Datasheet PDF - Dallas Semiconductor

●DESCRIPTION

●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. 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-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 SOIC surface mount package

●Operates over 4.5V to 5.5V from -40°C to +85°C