DS9097# Maxim Integrated Products, DS9097# Datasheet

DS9097#

Manufacturer Part Number

DS9097#

Description

COM PORT ADAPTER

Manufacturer

Maxim Integrated Products

Datasheet

1.DS9097.pdf (3 pages)

Specifications of DS9097#

Accessory Type

RS-232 to 1-Wire® Adapter

For Use With/related Products

1-Wire® Devices

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Part Number:

DS9097#DS9097U-E25#

Manufacturer:

Maxim Integrated Products

Quantity:

135

Company:

Part Number:

DS9097#DS9097U-S09#

Manufacturer:

Maxim

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Current page: 1 of 3
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FEATURES

 Provides a simple, low-cost interface to an

 Adapter is powered entirely from an RS232

 Standard DB-9 (DSD9097) or DB-25

 DS9097E has an additional 2.1 mm male

DESCRIPTION

The DS9097 COM Port Adapter is a simple, low-cost passive adapter which performs RS232C (±12V)

level conversion, allowing an iButton probe to be connected to the serial port of a computer so that a non-

EPROM iButton can be read and written directly. It can also read all EPROM-based iButtons. The serial

port must support a data transmission rate of 115.2 kbits/s in order to create the 1-Wire

correctly. Nearly all PCs support the required data rate and are fully compatible with the DS9097. Since

an 8-bit character (6 data bits plus start and stop bit) on the RS232 port operating at 115.2 kbits/s is used

to form a single 1-Wire time slot, the maximum effective 1-Wire transfer rate is 14.4 kbits/s (regular

speed). Details on the operation of the DS9097 are found in Application Note 214, Using a UART to

Implement a 1-Wire Bus Master.

19-4873; 8/09

iButton is a trademark of Maxim Integrated Products, Inc.

RS232C COM Port for reading and writing

iButton

programming DS198x Add-Only iButtons)

interface (DS9097E may require optional

auxiliary 12V supply)

(DS9097E) female connector for mating the

adapter to the COM Port of a computer and

RJ-11 connector for easy attachment of a

probe such as the DS9092GT

power jack to allow for an auxiliary 12V DC

supply for programming Add-Only iButtons

Pin assignment DS9097, DB-9

TXD (3), RXD (2), DTR (4), PC-Ground (5);

all other pins not connected

Pin assignment DS9097E, DB-25

TXD (2), RXD (3), DTR (20), RTS (4), PC-

Ground (7); all other pins not connected

Auxiliary supply should be a regulated 12V

@ 10 mA minimum, center=GND, outer

ring=V+ (Newark Electronics Stock No.

84F2081, Allied Electronics Stock No. 928-

9895, Stancor Model STA-300R, or

equivalent)

devices (DS9097E required for

1 of 3

ORDERING INFORMATION

DS9097#

DS9097E# DB-25 Version, EPROM upgraded

# Denotes an RoHS-compliant device that may include

lead(Pb) that is exempt under the RoHS requirements.

DB-9 Version

COM Port Adapter

DS9097/DS9097E

time slots

Related parts for DS9097#

DS9097# Summary of contents

Page 1

... Details on the operation of the DS9097 are found in Application Note 214, Using a UART to Implement a 1-Wire Bus Master. iButton is a trademark of Maxim Integrated Products, Inc. DS9097/DS9097E COM Port Adapter ORDERING INFORMATION DS9097# DB-9 Version DS9097E# DB-25 Version, EPROM upgraded # Denotes an RoHS-compliant device that may include lead(Pb) that is exempt under the RoHS requirements ...

Page 2

The DS9097E is an upgraded version of the DS9097 that is capable of supplying the 12 volts necessary to program the EPROM-based iButton products (DS198x Add-Only iButtons) in addition to reading and writing SRAM and EEPROM-based devices (DS199x, DS196x, DS197x). ...

Page 3

REVISION HISTORY REVISION DATE  Added an Ordering Information table.  Changed the reference to Application Note 74 to Application Note 214 in the 8/09 Description section. DESCRIPTION PAGES CHANGED 1 ...

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