1 of 2 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 b ipolar logic signals of 5v to 12v ( rs -232 c) 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 i button and eeprom i button ? communicates at data rates of 9.6 kbps (default), 19.2k bps , 57 .6k bps , and 115.2k bp s ? powered entirely from an rs -232 interface ? standard db 9 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 on ly) schematic (for illustration) 6 4 rts dtr rxd txd gnd rs - 232 com p ort 5v r eg ds2480b 1 7 8 5 2 id c hip ds1411 - 009 only ordering information part type ds1411 - 009# db9 c onnector, with id chip ds1411 - s09# db9 c onnector, 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 i button 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 i button 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 i buttons, refer to the connectivity matrix table in the ds1402 x 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 ad apter can be set up for rs - 232 data rates of 19200 bps , 57600 bps, and 115200 bps . 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 s erial 1 - wire l ine d river chip . the rxd/ txd p olarity s elect input of the ds2480b is connect ed to v dd (non inverting). free software drivers can be downloaded from www.maxim - ic.com/1 - wiredrivers . i button and 1 - wire are registered trademarks of maxim integrated products, inc. windows is a registered trademark of micro soft corp. 19 - 4862; rev 6 / 11 ds 1411 serial port i button holder
ds1411 2 of 2 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no cir cuit patent licenses are implied. maxim reserves the right to change the circuitry and specifi cations without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408 - 737 - 7600 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision date description pages changed 7/99 initial release ? 7/02 updated ordering information ; updated s chematic for conversion from ds2480 to ds2480b and optional id chip; replaced product graphic with photo; added c e and fcc compliance bullet to features ; c hanged i button retainer model from ds9098 to ds9098p 1 8/09 added # to the ordering information to reflect conversion to a rohs - compliant product ; added revision history table 1, 2 6/11 deleted references to c rypto i button, tmex, ds9097u, and ds1412; a d ded reference to the connectivity matrix table in the ds1402x 1 - wire network cables data sheet ; added the url for software drivers download 1
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