DS28EC20

DS28EC20 20Kb 1-Wire EEPROM GENERAL DESCRIPTION The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each. An additional page is set aside for control functions. Data is written to a 32-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, blocks of eight memory pages can be write protected or put in EPROM-Emulation mode, where bits can only be changed from a 1 to a 0 state. The DS28EC20 communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number. The registration number is used to address the device in a multidrop 1-Wire net environment. APPLICATIONS Device Authentication IEEE 1451.4 Sensor TEDS Ink/Toner Cartridges Medical Sensors PCB Identification Wireless Base Stations ORDERING INFORMATION PART TEMP RANGE PIN-PACKAGE DS28EC20+ -40°C to +85°C 3 TO-92 DS28EC20+T -40°C to +85°C 3 TO-92, T&R DS28EC20P+ -40°C to +85°C 6 TSOC DS28EC20P+T -40°C to +85°C 6 TSOC, T&R +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. TYPICAL OPERATING CIRCUIT VCC RPUP (300Ω to 2.2kΩ) PX.Y µC I/O DS28EC20 GND Commands, bytes, and modes are capitalized for clarity. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. FEATURES  20480 Bits of Nonvolatile (NV) EEPROM Partitioned into Eighty 256-Bit Pages  Individual 8-Page Groups of Memory Pages (Blocks) can be Perma...