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Data Sheet

FULL DATA SHEET (PDF, 120kB) Download   E-Mail

Description

The DS9097U is a sophisticated RS232 to 1-Wire® adapter, which performs RS232 level conversion and actively generates the 1-Wire communication signals. Together with an adequate TMEX software driver, it enables an IBM®-compatible PC to directly communicate with any 1-Wire device connected to the adapter's RJ-11 port. The DB-9 version reads and writes any non-EPROM 1-Wire device. To write to EPROM devices, the DB-25 version with external power supply is required. All DS9097U adapters are based on the DS2480B Serial 1-Wire Line Driver chip and therefore are not a plug-in replacement for the DS9097 or DS9097E. The RXD/TXD Polarity Select input of the DS2480B is tied to VDD (non-inverting). Free software drivers can be downloaded from http://www.ibutton.com/software/tmex/index.html. The DS9097U communicates with 1-Wire devices at regular 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 RS232 data rates of 19200, 57600, 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 RS232 port generates eight time slots on the 1-Wire line. At 19200bps data rate the DS9097U-E25 is already faster than the DS9097 (E) at 115200bps. Note that there are some COM ports that use signal levels of less than (±)5V. The DB-9 versions of this adapter will not work with such ports. The DS9097U-E25 adapter, however, will function in most cases if external power is supplied. Without EPROM programming, the external power may 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.

Key Features

True-Ground Interface to an RS232 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 (DB-9 Version Only) or (±)6V to (±)12V (DB-25 Version) Supports Reading and Writing at Regular and Overdrive Speeds Provides Strong Pullup to 5V for Temperature-, Crypto-, and EEPROM 1-Wire devices Programs 1-Wire EPROM Devices (DB-25 Version with External 12V Power Supply Only) Communicates at Data Rates of 9.6 (default), 19.2, 57.6, and 115.2kbps Standard DB-9 or DB-25 Female Connector and 6-lead RJ-11 Connector for Easy Attachment of Standard 1-Wire Cables and Probes Includes DS2502 Identification Chip (DS9097U-009 only)

Key Specifications:   iButton Readers and Adapters
Part Number	Overview	Features	RoHS Available	Price**
DS9097U-009	Universal Serial Port Adapter with ID	• With ID	Yes	$12.92 @ 1k
DS9097U-E25	EPROM Programming, Universal Serial Port Adapter	• EPROM Compatible Adapter		$22.98 @ 1k
DS9097U-S09	Universal Serial Port Adapter w/o ID	-		$12.69 @ 1k
See All iButton Readers and Adapters (25)

Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Application Notes

Application Note 148: Guidelines for Reliable 1-Wire Networks - DS9097U-009, DS9097U-S09 Application Note 1097: White Paper 2: Using the 1-Wire® Public-Domain Kit - DS9097U-009, DS9097U-E25, DS9097U-S09 Application Note 3358: OneWireViewer User's Guide - DS9097U-009, DS9097U-E25, DS9097U-S09 Application Note 3808: What Is an iButton? - DS9097U-S09 Application Note 4206: Choosing the Right 1-Wire® Master for Embedded Applications - DS9097U

Evaluation Kits

none

Design Guides

1-Wire® PRODUCTS (PDF)

Reliability Reports

Request Reliability Report for: DS9097U DS9097U-009 DS9097U-E25 DS9097U-S09

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: 1-6 of 6
DS9097U-009	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS9097U-009#				IBACC;* pin; Use pkgcode/variation: IB#ACC*	0°C to +70°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis
DS9097U-009	With No.			IBACC;* pin; Use pkgcode/variation: IB-ACC*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS9097U-E25	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS9097U-E25#				IBACC;* pin; Use pkgcode/variation: IB#ACC*	0°C to +70°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis
DS9097U-E25				IBACC;* pin; Use pkgcode/variation: IB-ACC*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS9097U-S09	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS9097U-S09#				IBACC;* pin; Use pkgcode/variation: IB#ACC*	0°C to +70°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis
DS9097U-S09	Without No.			IBACC;* pin; Use pkgcode/variation: IB-ACC*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis

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