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Status
Part Number	Status
DS2480B	Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Data Sheet

FULL DATA SHEET (PDF, 424kB) Download   E-Mail

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. 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 various control functions of the DS2480B are optimized for MicroLAN 1-Wire networks and support the special needs of all current 1-Wire/iButton 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.

Key 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 115200bps 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 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 -40°C to +85°C

Diagram

Block Diagram

Application Notes

Application Note 126: 1-Wire® Communication Through Software - DS2480B Application Note 148: Guidelines for Reliable Long Line 1-Wire® Networks - DS2480B Application Note 192: Using the DS2480B Serial 1-Wire Line Driver - DS2480B Application Note 193: Extending 1-Wire® Range with Network Proxies - DS2480B Application Note 1097: White Paper 2: Using the 1-Wire® Public Domain Kit - DS2480B Application Note 3358: OneWireViewer User's Guide, Version 1.4 - DS2480B Application Note 3438: Serial Digital Data Networks - DS2480B Application Note 3829: Determining the Recovery Time for Multiple-Slave 1-Wire Networks - DS2480B Application Note 3989: Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact - DS2480B Application Note 4104: Understanding and Configuring the 1-Wire Timing of the DS2480B - DS2480B Application Note 4206: Choosing the Right 1-Wire® Master for Embedded Applications - DS2480B Application Note 4478: How to Implement SHA-1 Based Secure Authentication and System Feature Settings - DS2480B

Design Guides

1-Wire® Products (PDF)

Reliability Reports

Reliability Report: DS2480B.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

DS2480B	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2480B		N/A	No Longer Available	DS2480	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2480B/T&R		N/A	No Longer Available	DS2480B+	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2480B+			Active		SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2480B+T&R			Active		SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Sensor Calibration

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