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Maxim > Products > 1-Wire® Devices

1-Wire—Most Efficient ID and Authentication Solution for Medical Consumables

Spare connector pins between the host system and accessory are typically limited. Consequently, it is a genuine challenge to add authentication and usage monitoring without increasing connector complexity and cost. The 1-Wire® product line not only solves all these host/accessory connectivity requirements, but also enables implementation with only a single, dedicated connector contact.

Unique SFN packaging allows the 1-Wire device to attach easily to nonelectronic peripherals like medical sensors and reagent bottles. The SFN package is based on the industry-standard DFN/QFN, and can be mounted with snap-fit or adhesive into a recessed area. The 1-Wire authentication and monitoring features are thus accomplished with a single, dedicated connector contact, which reduces connector complexity and cost.

New SFN packaging simplifies adding 1-Wire ICs to nonelectronic peripherals.

1-Wire Versatility

Automatically Calibrates Sensors or Consumables
Determines Host System Operating Mode Appropriate to the Attached Peripheral
Ensures Reliability and Quality, Which Can Be Undermined by Low-Quality OEM Knock-Off Products

1-Wire Devices Commonly Used for Accessory and Sensor Applications
Part	Memory Type	Memory Size (Bits)	Additional Features	Packages
DS2431	EEPROM	1k	Write protection, OTP modes	6-TSOC, TO-92, SFN
DS2432 DS28E01-100	EEPROM	1k	SHA-1 authentication	6-TSOC, UCSP™, SFN
DS28EC20	EEPROM	20k	Write protection, OTP modes	6-TSOC, TO-92
DS2433	EEPROM	4k	—	8-SO, PR35, flip chip
DS250x	EPROM	1k, 16k	Write protection	6-TSOC, TO-92, CSP, 3-SOT23, 8-SO
DS2413	ROM only	64	Dual 20V/20mA GPIO	6-TSOC
DS2401	ROM only	64	—	6-TSOC, SOT23, TO-92, flip chip