DESIGN OF A CUSTOM ASIC INCORPORATING CAN™ AND 1 ...

2.4.2 Device Functions and Typical Applications
At this time, there are approximately 40 1 – Wire® devices, including some close to the
end of their lifetime. iButton 1 – Wire® devices can be categorized into one of seven
categories: ID only, NV SRAM, EPROM, EEPROM, Real-Time Clocks, Secure, and Data
Loggers. Remaining 1 – Wire® devices fall into one of eight categories: EPROM; EEPROM;
Memory with GPIO; Temperature Sensors and Switches; 1 – Wire® Interface Products; four
Channel A-to-D Converter; Timekeeping and Real-Time Clocks; and Battery Protectors,
Selectors, and Monitors.
Although the original concept behind the development of the 1 – Wire® protocol was to
provide simplified communications on a single PCB, the main applications of 1 – Wire® devices
today are primarily but not limited to the following:
Print Cartridge ID – using unique SFN packaging, 1 – Wire® devices can easily be
attached to nonelectronic peripherals like printer consumables. The SFN package can be
mounted with snap-fit or adhesive into a recessed area. This allows 1 – Wire®
authentication and monitoring features with a single, dedicated connector contact, which
reduces connector complexity and cost. The 1 – Wire® devices typically used include
the DS1990A/DS1990R, DS1982, and DS1985.
Medical Consumable ID – SFN packaging allows easy attachment to nonelectronic
peripherals like medical sensors (ID and calibration), blood glucose strips (calibration
and authentication), and reagent bottles (ID). The 1 – Wire® devices typically used
include the DS2401, DS2413, DS2502, DS2506, DS2431, DS28EC20, DS2433, DS2432,
and DS28E01.
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