DS1973 EEPROM iButton® 4096 bits Electrically Erasable Programmab
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19-4889; 8/09
DS1973 EEPROM iButton®
4096 bits Electrically Erasable Programmable Read Only Memory (EEPROM) Overdrive mode boosts communication speed 142kbps 256-bit scratchpad ensures integrity data transfer Memory partitioned into 256-bit pages packetizing data Reduces control, address, data power single data 8-bit family code specifies DS1973 communication 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 48-bit serial number 8-bit tester) assures absolute identity 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
ORDERING INFORMATION
PART PIN-PACKAGE DS1973-F3+ MicroCan DS1973-F5+ MicroCan +Denotes lead(Pb)-free/RoHS-compliant package.
EXAMPLES ACCESSORIES
DS9096P DS9101 DS9093RA DS9093A DS9092 Self-Stick Adhesive Multi-Purpose Clip Mounting Lock Ring Snap-In iButton Probe
iButton 1-Wire registered trademarks Maxim Integrated Products, Inc.
DS1973
iButton DESCRIPTION
DS1973 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 micro-controller. DS1973 consists factorylasered registration number that includes unique 48-bit serial number, 8-bit CRC, 8-bit Family Code (23H) plus 4096 bits EEPROM. power program read DS1973 derived entirely from 1-Wire communication line. memory organized sixteen pages bits each. 64-bit registration number provides guaranteed unique identity which allows absolute traceability. Data transferred serially 1-Wire protocol which requires only single data lead ground return. durable MicroCan package highly resistant harsh environments such dirt, moisture, shock. compact button-shaped profile self-aligning with cup-shaped receptacles, allowing DS1973 used easily human operators automatic equipment. Accessories permit DS1973 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 DS1973. DS1973 three main data components: 64-bit lasered ROM, 256-bit scratchpad, 4096-bit EEPROM. master must first provide function commands before memory functions become accessible. data read written least significant first. DS1973 contains same memory chip DS2433. full description logical behavior, please refer DS2433 data sheet.
DS1973 BLOCK DIAGRAM Figure
DS1973
REVISION HISTORY
REVISION DATE 071508 DESCRIPTION Updated MicroCan MicroCan face brands with latest H020201. Added sign PART numbers Ordering Information table, indicating lead(Pb)-free/RoHS-compliant packages. Removed UL#913 bullet from Common iButton Features section. PAGES CHANGED
8/09
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. 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 registered trademark Maxim Integrated Products, Inc.
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