Interface IC from Maxim connects directly to UARTs and 5V RS232 systems

Maxim has introduced The DS2480B, which is a serial port to 1-Wire interface chip that supports standard and overdrive speeds and can connect 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 burden of generating time-critical 1-Wire communication waveforms.

The DS2480B can translate each character into eight 1-Wire time slots in contrast to the DS9097(E) where a full character must be sent by the host for each 1-Wire time slot thus improving the throughput. It can also communicate between four different data rates i.e. 115.2kbps, 57.6kbps, 19.2kbps and 9.6kbps, 9.6kbps being the power-on default. The host's crystal controlled UART generates command codes that serve as a reference to calibrate the on-chip timing generator. This port uses a protocol that can merge data and control information without requiring control pins, therefore making it compatible to off-the-shelf serial to wireless converters thus allowing realization of 1-Wire media jumpers. The port's control functions are used for 1-Wire networks and supports current 1-Wire devices like EPROM-based add-only memories, EEPROM devices, and 1-Wire thermometers.

Other features of the serial port are:

--Supports 12V EPROM Programming and Stiff 5V Pullup for Sensors and EEPROM
--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
--Operates Over 4.5V to 5.5V from -40°C to +85°C

Package: 8-Pin SO Surface-Mount

Price: Each US$2.06 for 1k quantities.

Availability: Now