DS9097U - RS232 1-Wire Host Adapter

The DS9097U is a RS-232 to 1-Wire adapter, which performs RS-232 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).

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 RS-232 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 RS-232 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 6 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.

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 ports 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 pull-up 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).

1-Wire is a registered trademark of Dallas Semiconductor.

Support / Documentation

Downloadable manuals, knowledgebase articles, and more can be found by searching our technical support website.

Purchasing Information

Product Options

DS9097U Version

DS9097U-S09# (RoHS Compliant): DB-9 - Add $0.00
26 available for immediate shipment.

DS9097U-009# (RoHS Compliant): DB-9, ID Chip - Add $0.50
14 available for immediate shipment.

DS9097U-E25# (RoHS Compliant): DB-25, EPROM Compatible - Add $22.82
8 available for immediate shipment.

Licensed for use with OneSix Server - Add $31.79
9 available for immediate shipment.

Volume Price
Quantity	Price Each
1-9	$28.16
10-24	$25.34
25-49	$23.46
50-99	$21.11
100+	$16.56

Shipping Weight: 0.07 pounds

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