DS2485

PRODUCTION

Advanced 1-Wire® Master with Memory

Best-in-Class 1-Wire Master Performs Protocol Conversion Between the I2C Master and 1-Wire Slaves

Data Sheet (Rev. 1) Product Selection Table
Part Models
2
1ku List Price
Starting From $1.18
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Part Details

  • I2C Communication, up to 1MHz
  • 1-Wire Standard and Overdrive Timing Communication Speeds
  • 1-Wire Command Scripting Capability
  • Adjustable 1-Wire Timing for tRSTL, tMSI, tMSP, tRSTH, tW0L, tW1L, tMSR, tREC, RPUP, and PDSLEW
  • 0.75Kb of EEPROM for User Data
  • One Open-Drain GPIO Pin
  • Large 1-Wire Block Buffer (126 Bytes) for Efficient Data Transfer
  • Operating Range: 2.97V to 3.63V, -40°C to +85°C
  • ±8kV HBM ESD Protection of 1-Wire IO Pin
  • 3mm x 3mm, 6-Pin TDFN-EP Package
DS2485
Advanced 1-Wire® Master with Memory
DS2485 Typical Application Circuit DS2485 Pin Configuration
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Documentation

Data Sheet 1

Application Note 1

Design Note 2

Technical Articles 2

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Tools & Simulations

Software Development 2

Evaluation Kits

DS2485EVKIT

Evaluation Kit for the DS2485

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Features and Benefits

  • Provides the Ability to Exercise All Functional Commands
  • Quickly Create, Save, and Load Custom 1-Wire Scripts
  • Customizable Timings Allow for Various 1-Wire Configurations such as Long Lines
  • Flexible Timings Ensure Support for Existing and Future Devices
  • Alterable I2C Address Ensures a Conflict-Free Environment
  • Easily Discover Connected 1-Wire Devices with Built-in Search ROM Accelerator
  • GPIO Allows External Control or Signaling
  • Fully Compliant with USB Specification v2.0

Product Details

The DS2485 evaluation (EV) kit provides the hardware and software necessary to exercise the features of the DS2485. The EV kit’s main hardware consists of a DS9481P-300 USB-to-1-Wire® adapter, DS2485 EV kit peripheral module, and DS9121BQ socket board. Both the DS2485 and DS28E07 devices are included for evaluation. The software runs on Windows® 10, Windows 8, and Windows 7 operating systems and provides a graphical user interface (GUI) to exercise the features of the DS2485

Applications

  • Industrial Sensors and Tools
  • Limited-Use Consumables
  • Medical Instruments
  • Printer Cartridge Identification
DS2485EVKIT
Evaluation Kit for the DS2485

Reference Designs

maxrefdes9004 board
maxrefdes9004 board
MAXREFDES9004 Circuits from the lab

C-source Reference for Operating the DS2485 Combined with a DS28E18 from a Cortex-M4 Microcontroller

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Features and Benefits

  • Dedicated 1-Wire Master for Convenient 1-Wire Processing
  • Up to 100m Remote Communication with Connected 1-Wire Slave Devices
  • C-Code Demonstrates How to Use the DS2485 in Software Including an Example with the DS28E18

Designed–Built–Tested

A simple, cost-efficient, 1-Wire master is demonstrated using the DS2485 for a simple sensor application using the MAX32660 host microcontroller. This reference design includes the following major components: one each of MAX32660 Cortex-M4 microcontroller, DS2485 1-Wire master, DS28E18 1-Wire to I2C/SPI bridge and an I2C temperature sensor module. This document describes the hardware shown above as well as its supplementing software. It provides a detailed, systematic technical guide to set up and understand the MAXREFDES9004 reference design. The system has been built and tested, details of which follow later in this document.
MAXREFDES9004
C-source Reference for Operating the DS2485 Combined with a DS28E18 from a Cortex-M4 Microcontroller
maxrefdes9004 board

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