DS1971 Datasheet (Dallas Semiconducotr)

DS1971, 256-Bit EEPROM iButton

The DS1971 256-bit EEPROM iButton is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached.

This information can be accessed with minimal hardware: for example, a single port pin of a microcontroller.

The DS1971 consists

DS1971 Features

* 256-bit Electrically Erasable Programmable Read Only Memory (EEPROM) communicates with the economy of one signal plus ground

* EEPROM organized as one 256-bit page

* 64-bit one-time programmable application register is automatically write-protected after programming

* Reduces contr