DS1996 64Kb Memory iButton存儲器

The DS1996 Memory iButton is a rugged read/write data carrier that acts as a localized database that can

be easily accessed with minimal hardware. The nonvolatile memory offers a simple solution to storing

and retrieving vital information pertaining to the object to which the iButton is attached. Data is

transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return.

The scratchpad is an additional page that acts as a buffer when writing to memory. Data is first written to

the scratchpad where it can be read back. After the data has been verified, a copy scratchpad command

will transfer the data to memory. This process ensures data integrity when modifying the memory. A

48-bit serial number is factory lasered into each DS1996 to provide a guaranteed unique identity which

allows for absolute traceability. The durable MicroCan package is highly resistant to environmental

hazards such as dirt, moisture, and shock. Its compact button-shaped profile is self-aligning with mating

receptacles, allowing the DS1996 to be easily used by human operators. Accessories permit the DS1996

to be mounted on almost any surface including plastic key fobs, photo-ID badges and printed circuit

boards. Applications include access control, work-in-progress tracking, electronic travelers, storage of

calibration constants, and debit tokens.

DS1996 64Kb Memory iButton存儲器

SPECIAL FEATURES

? 65,536 bits of read/write nonvolatile memory

? Overdrive mode boosts communication

speed to 142 kbits per second

? 256-bit scratchpad ensures integrity of data

transfer

? Memory partitioned into 256-bit pages for

packetizing data

? Data integrity assured with strict read/write

protocols

? Operating temperature range from -40°C to

+70°C

? Over 10 years of data retention

DS1996 64Kb Memory iButton存儲器

COMMON iButton FEATURES

? Unique, factory-lasered and tested 64-bit

registration number (8-bit family code + 48-

bit serial number 8-bit CRC tester) assures

absolute traceability because no two parts are

alike

? Multidrop controller for MicroLAN

? Digital identification and information by

momentary contact

? Chip-based data carrier compactly stores

information

? Data can be accessed while affixed to object

? Economically communicates to bus master

with a single digital signal at 16.3 kbits per

second

? Standard 16 mm diameter and 1-Wire ®

protocol ensure compatibility with iButton ®

family

? Button shape is self-aligning with cup-

shaped probes