DS1971 256-Bit EEPROM iButton® 256-bit Electrically Erasable Prog

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DS1971 256-Bit EEPROM iButton® 256-bit Electrically Erasable Prog

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19-4734; 7/09
DS1971 256-Bit EEPROM iButton®
256-bit Electrically Erasable Programmable Read Only Memory (EEPROM) communicates with economy signal plus ground EEPROM organized 256-bit page 64-bit one-time programmable application register automatically write-protected after programming Reduces control, address, data, power, programming signals single data 8-bit family code specifies DS1971 communications requirements reader Reads writes over wide voltage range 2.8V 6.0V from -40°C +85°C
COMMON iButton FEATURES
Unique, factory-lasered tested 64-bit registration number (8-bit family code 48bit serial number 8-bit tester) assures absolute traceability because parts alike Multidrop controller MicroLAN Digital identification information momentary contact Chip-based data carrier compactly stores information Data accessed while affixed object Economically communicates master with single digital signal 16.3kbps Standard 16mm diameter 1-Wire protocol ensure compatibility with iButton family Button shape self-aligning with cupshaped probes Durable stainless steel case engraved with registration number withstands harsh environments Easily affixed with self-stick adhesive backing, latched flange, locked with ring pressed onto Presence detector acknowledges when reader first applies voltage MicroCan MicroCan
MicroCan
ORDERING INFORMATION MicroCan
DS1971-F3+ DS1971-F5+
+Denotes lead(Pb)-free/RoHS-compliant package.
EXAMPLES ACCESSORIES
DS9096P
DS9101 DS9093RA DS9093F DS9092
Self-Stick Adhesive Multi-Purpose Clip Mounting Lock Ring Snap-in iButton Probe
iButton 1-Wire registered trademarks Maxim Integrated Products, Inc.
DS1971
iButton DESCRIPTION
DS1971 256-bit EEPROM iButton rugged read/write data carrier that identifies stores relevant information about product person which attached. This information accessed with minimal hardware: example, single port microcontroller. DS1971 consists factory-lasered registration number that includes unique 48-bit serial number, 8-bit CRC, 8-bit Family Code (14H) plus bits EEPROM. power program read DS1971 derived entirely from 1-Wire communication line. Data transferred serially 1-Wire protocol which requires only single data lead ground return. 48-bit serial number that factorylasered into each DS1971 provides guaranteed unique identity which allows absolute traceability. durable MicroCan package highly resistant harsh environments such dirt, moisture, shock. compact button-shaped profile self-aligning with cup-shaped receptacles, allowing DS1971 used easily human operators automatic equipment. Accessories permit DS1971 mounted printed circuit boards, plastic fobs, photo-ID badges, bracelets, many other objects. Applications include work-in-progress tracking, electronic travelers, access control storage calibration constants.
OVERVIEW
block diagram Figure shows relationships between major control memory sections DS1971. DS1971 four main data components: 64-bit lasered ROM, 256-bit EEPROM data memory with scratchpad, 64-bit one-time programmable application register with scratchpad, 8-bit status memory. master must first provide Function Commands before memory functions become accessible. data read written least significant first. DS1971 contains same memory chip DS2430A. full description logical behavior, please refer DS2430A data sheet.
DS1971
DS1971 BLOCK DIAGRAM Figure
DS1971
REVISION HISTORY
REVISION DATE 071508 7/09 DESCRIPTION Updated MicroCan MicroCan face brands with latest H020201. Conversion lead(Pb)-free; removal bullet "Designed meet UL#913 (4th Edit.)." PAGES CHANGED
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600
2009 Maxim Integrated Products
Maxim logo registered trademark Maxim Integrated Products, Inc.

DS1971 256-Bit EEPROM iButton® 256-bit Electrically Erasable Prog

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