DS1982 Datasheet 1Kb Add-Only iButton

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-4891; Rev 8/09 SPECIAL.

Datasheet Details

Part number	DS1982
Manufacturer	Maxim Integrated (now Analog Devices)
File Size	681.94 KB
Description	1Kb Add-Only iButton
Download	DS1982 Download (PDF)

1024 bits Electrically Programmable ReadOnly Memory (EPROM) communicates with the economy of one signal plus ground.
EPROM partitioned into four 256-bit pages for randomly accessing packetized data.
Each memory page can be permanently writeprotected to prevent tampering.
Device is an “add only” memory where additional data can be programmed into EPROM without disturbing existing data.
Architecture allows software to patch data by superseding an old page in favor of a ne.

Brand Logo	Part Number	Description	Manufacturer
	DS1982	1-kbit Add-Only iButton	Dallas Semiconductor
	DS1982U	(DS1982U - DS1986U) Uniqueware Ibutton	Dallas Semiconductor

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