19-4862; Rev 6/11 DS1411 Serial Port iButton Holder FEATURES Small Size, True-Ground Interface to an RS-232 COM Port for Reading and Writing iButton® 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 SCHEMATIC (FOR ILLUSTRATION) RS-232 COM PORT Communicates at Data Rates of 9.6kbps (default), 19.2kbps, 57.6kbps, and 115.2kbps Powered Entirely from an RS-232 Interface RTS DTR RXD TXD GND Standard DB9 Female Connector for Mating to the COM Port of a Computer with DS9098P iButton Retainer for a Single iButton Includes DS2502 Identification Chip (DS1411-009 Version Only) DS1411-009 ONLY 5V REG 8 4 6 DS2480B 5 7 2 ID CHIP 1 ORDERING INFORMATION PART DS1411-009# DS1411-S09# TYPE 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 VDD (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. 1 of 2 DS1411 REVISION HISTORY REVISION DATE 7/99 7/02 8/09 6/11 DESCRIPTION Initial release Updated Ordering Information; updated Schematic for conversion from DS2480 to DS2480B and optional ID chip; replaced product graphic with photo; added CE and FCC compliance bullet to Features; changed iButton retainer model from DS9098 to DS9098P Added # to the Ordering Information to reflect conversion to a RoHScompliant product; added Revision History table Deleted references to Crypto iButton, TMEX, DS9097U, and DS1412; added reference to the Connectivity Matrix table in the DS1402x 1-Wire network cables data sheet; added the URL for software drivers download PAGES CHANGED — 1 1, 2 1 2 of 2 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. M a x i m I n t e g r a t e d P r o d u c t s , 1 2 0 S a n G a b r i e l D r iv e , S u n n y v a le , C A 9 4 0 8 6 4 0 8- 7 3 7 - 7 6 0 0 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.