DS1985 Datasheet 16Kb Add-Only iButton

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-4892; Rev 8/09 SPECIAL.

Datasheet Details

Part number	DS1985
Manufacturer	Maxim Integrated (now Analog Devices)
File Size	682.49 KB
Description	16Kb Add-Only iButton
Download	DS1985 Download (PDF)

16384 bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground.
EPROM partitioned into 64 256-bit pages for randomly accessing packetized data records.
Each memory page can be permanently write protected 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 favo.

Brand Logo	Part Number	Description	Manufacturer
	DS1985	16-kbit Add-Only iButton	Dallas Semiconductor
	DS1985U	(DS1982U - DS1986U) Uniqueware Ibutton	Dallas Semiconductor

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