DS2480B
Serial to 1-Wire Line Driver
- Part Models
- 2
- 1ku List Price
- Starting From $3.91
Part Details
- Simplifies the Design of a Low-Cost, Universal RS-232 COM Port to 1-Wire® Interface True-Ground
- Interface to an RS-232 COM Port for Reading and Writing 1-Wire Devices
- Works with Bipolar as well as Unipolar Logic Signals
- Slew Rate Controlled 1-Wire Pulldown and Active Pullup to Accommodate Long Lines and Reduce Radiation
- Communicates at Data Rates of 9.6kbps (default), 19.2kbps, 57.6kbps, and 115.2kbps
- Self-Calibrating Time Base with ±5% Tolerance for Serial and 1-Wire Communication
- User-Selectable RXD/TXD Polarity Minimizes Component Count When Interfacing to 5V Based RS232 Systems or Directly to UARTs
- Smart Protocol Combines Data and Control Information Without Requiring Extra Pins
- Compatible with Optical, IR, and RF to RS232 Converters
- Single Product Supports Various iButton® or 1-Wire Device Types for Easy System Integration
- Supports Reading and Writing at Standard and Overdrive Speeds
- Provides Strong Pullup to 5V for Temperature and EEPROM 1-Wire Devices
- Programs 1-Wire EPROM Devices with External 12V Power Supply
- Programmable 1-WireTiming and Driver Characteristics Accommodate a Wide Range of Slave Device Configurations at Standard Speed
- Operates Over 4.5V to 5.5V from -40°C to +85°C
The DS2480B is a serial port to 1-Wire® interface chip that supports standard and overdrive speeds. It connects directly to UARTs and 5V RS-232 systems. Interfacing to RS-232C (±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. In contrast to the DS9097(E) where a full character must be sent by the host for each 1-Wire time slot, the DS2480B can translate each character into eight 1-Wire time slots, thereby increasing the data throughput significantly. In addition, the DS2480B can be set to communicate at four different data rates, including 115.2kbps, 57.6kbps, and 19.2kbps, with 9.6kbps being the power-on default. Command codes received from the host's crystal controlled UART serve as a reference to continuously calibrate the on-chip timing generator. The DS2480B uses a unique protocol that merges data and control information without requiring control pins. This approach maintains compatibility to off-the-shelf serial to wireless converters, allowing easy realization of 1-Wire media jumpers. The various control functions of the DS2480B are optimized for 1-Wire networks and support the special needs of all current 1-Wire devices including EPROM-based add-only memories, EEPROM devices, and 1-Wire thermometers. See Application Note 192: Using the DS2480B Serial 1-Wire Driver for detailed software examples.
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 1
Design Note 2
Technical Articles 10
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
---|---|---|---|
DS2480B+ | Small-Outline IC, Narrow (0.15in) | ||
DS2480B+T&R | Small-Outline IC, Narrow (0.15in) |
Part Models | Product Lifecycle | PCN |
---|---|---|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
DS2480B+ | PRODUCTION | |
DS2480B+T&R | PRODUCTION |
This is the most up-to-date revision of the Data Sheet.
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