DS9097U
Info : RECOMMENDED FOR NEW DESIGNS
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DS9097U

Universal 1-Wire COM Port Adapter

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 3
1ku List Price Starting From $30.59
Features
  • 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
  • Compatible to COM port of (±)5V to (±)12V (DB9 Version Only) or (±)6V to (±)12V (DB25 Version)
  • 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 (DB-25 Version with External 12V Power Supply Only)
  • Communicates at Data Rates of 9.6kbps (default), 19.2kbps, 57.6kbps, and 115.2kbps
  • Standard DB9 or DB25 Female Connector and 6-Lead RJ11 Connector for Easy Attachment of Standard 1-Wire Cables and Probes
  • Includes DS2502 Identification Chip (DS9097U-009 Only)
Additional Details
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The DS9097U is a sophisticated RS-232 to 1-Wire® adapter, which performs RS-232 level conversion and actively generates the 1-Wire communication signals. Together with an adequate software driver, it enables a Windows®-based PC to directly communicate with any 1-Wire device connected to the adapter's RJ11 port. The DB9 version reads and writes any non-EPROM 1-Wire device. To write to EPROM devices, the DB25 version with external power supply is required. For a list of suitable 1-Wire network cables, refer to the Connectivity Matrix table in the DS1402x 1-Wire network cables data sheet.

All DS9097U adapters are based on the DS2480B serial 1-Wire line driver chip. The RXD/TXD polarity select input of the DS2480B is connected to VDD (noninverting).

Free software drivers can be downloaded here.

The DS9097U communicates with 1-Wire devices at standard speed as well as overdrive speed. The serial port must support a data transmission rate of 9600bps. Under software control, the adapter can be set up for RS-232 data rates of 19200bps, 57600bps, and 115200bps. The two higher rates are recommended for communication at overdrive speed with overdrive-capable devices. Since the DS9097U operates in a byte mode, every data byte received from the RS-232 port generates eight time slots on the 1-Wire line.

Note that there are some COM ports that use signal levels of less than (±) 5V. The DB9 versions of this adapter do not work with such ports. The DS9097U-E25 adapter, however, functions in most cases if external power is supplied. Without EPROM programming, the external power can be anywhere in the range of 6V to 9V. For EPROM programming the voltage must be at 12V in any case. Before using an externally powered DS9097U-E25 with a COM port of less than (±) 5V, check whether the COM port will not be damaged by 5V on its RXD input.

Part Models 3
1ku List Price Starting From $30.59

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
DS9097U-009#
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DS9097U-E25#
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DS9097U-S09#
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Product Lifecycle

PCN

Aug 11, 2015

- 1479D

ASSEMBLY

DS9097U-009#

PRODUCTION

DS9097U-E25#

PRODUCTION

DS9097U-S09#

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Aug 11, 2015

- 1479D

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ASSEMBLY

DS9097U-009#

PRODUCTION

DS9097U-E25#

PRODUCTION

DS9097U-S09#

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

DSECASH

eCash Evaluation Kit

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DSECASH

eCash Evaluation Kit

eCash Evaluation Kit

Features and Benefits

  • Stand-alone eCash evaluation circuit board with LCD display and Audible feedback.
  • Supports both DS1963S and DS1961S iButton SHA-1 devices as debit tokens.
  • Once initialized, the DS1963S coprocessor on the debit board keeps the money secret secure
  • Secure eCash debits in 100ms (approximate).
  • 2 Java™ programs (compatible with Windows® and Linux) provided for download to initialize eCash coprocessors and tokens as well as to monitor evaluation board.
  • Evaluation board can be used as a component in a larger control system (Service Control Unit).
  • Complete firmware source provided in portable 'C' code.
  • Schematic design and list of components of eval board provided.
  • Evaluation board can be used for eCash code development with the onboard single-cycle 8051 compatible DS89C420.

Product Detail

The eCash Evaluation Kit demonstrates the speed, reliability, and security of a SHA-1 based iButton® eCash system. The provided eCash debit board is a complete stand-alone module that will perform monetary debits in a fast 100ms. The eCash debit board has a serial interface that allows a PC or microprocessor to monitor or provide manual control of the debit process. Utilizing the serial interface, this demo could easily be integrated into a real eCash or access control system.

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