DS2480 Datasheet | Dallas Semiconducotr

.dalsemi. Features Universal, mon-ground serial port to 1-Wire TM line driver for Micro LANTM applications Works with all i Buttons™ and Micro LANpatible 1-Wire slave devices municates 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 i Button, sensors and EEPROM Self-calibrating time base with ±5% tolerance for serial and 1-Wire munication Slew rate controlled 1-Wire pull-down and active pull-up to acmodate long lines and reduce radiation User-selectable RXD/TXD polarity minimizes ponent count when interfacing to 5V based RS232 systems or directly to UARTs Programmable 1-Wire timing and driver characteristics acmodate a wide range of Micro LAN configurations at regular speed Smart protocol bines data and control information without requiring extra pins patible 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 DS2480 Serial 1-Wire™ Line Driver PIN ASSIGNMENT GND 1-W NC VDD 1 8 RXD 2 7 TXD 3 6 POL 4 5 VPP 8-PIN SOIC (150 MIL) PIN DESCRIPTION Ground 1-W 1-Wire Input/Output NC No Connection VDD 4.5 to 5.5V VPP Optional EPROM Programming Voltage POL RXD/TXD Polarity Select Serial Data from UART Serial Data to UART ORDERING INFORMATION DS2480S 8-pin SOIC 1 of 33 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 munication waveforms. In contrast to the DS9097 (E) where a full character must be sent by the host for each 1-Wire time slot, the DS2480 can translate each character into eight...