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FEATURES
Small Size, True-Ground Interface to an
RS-232 COM Port for Reading and Writing
i
Button
®
Devices
CE and FCC Compliant
Works with Bipolar Logic Signals of ±5V to
± 12V (RS-232C) as well as Unipolar Signals
of 5V to 12V
Supports Reading and Writing at Standard
and Overdrive Speeds
Provides Strong Pullup to 5V for
Temperature iButton and EEPROM iButton
Communicates at Data Rates of 9.6kbps
(default), 19.2kbps, 57.6kbps, and 115.2kbps
Powered Entirely from an RS-232 Interface
Standard DB9 Female Connector for Mating
to the COM Port of a Computer with
DS9098P i
Button Retainer for a Single
i
Button
Includes DS2502 Identification Chip
(DS1411-009 Version Only)
SCHEMATIC (FOR ILLUSTRATION)
ORDERING INFORMATION
DB9 connector, with ID chip
DB9 connector, no ID chip
#Denotes a RoHS-compliant device that may include lead(Pb) that is
exempt under the RoHS requirements.
DESCRIPTION
The DS1411 is a sophisticated RS-232-to-1-Wire
®
adapter and iButton holder that 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 read all and write any non-EPROM iButton devices.
The DS1411 has a DS9098P retainer for a single F5 MicroCan. For a list of suitable 1-Wire network
cables, e.g., to connect multiple iButtons, refer to the Connectivity Matrix table in the DS1402x 1-Wire
network cables data sheet. 1-Wire communication is supported by the adapter for standard speed as well
as overdrive speed. The serial port must support a data transmission rate of 9600 bits/s. 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 DS1411 operates in a byte mode, every data byte received from the RS-232 port generates eight
time slots on the 1-Wire bus. The DS1411 is based on the DS2480B serial 1-Wire line driver chip. The
RXD/TXD polarity select input of the DS2480B is connected to V
DD
(noninverting). Free software
drivers can be downloaded from www.maxim-ic.com/1-Wiredrivers.
iButton and 1-Wire are registered trademarks of Maxim Integrated Products, Inc.
Windows is a registered trademark of Microsoft Corp.
Serial Port i
