DS28EC20 Datasheet | Maxim Integrated

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 municates over the single-conductor 1-Wire bus. The munication 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/Ro HS-pliant package. T = Tape and reel. TYPICAL OPERATING CIRCUIT RPUP (300Ω to 2.2kΩ) PX.Y µC I/O DS28EC20 GND mands, 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 Permanently Write Protected or Put in OTP EPROM-Emulation Mode ("Write to 0") - Read and Write Access Highly Backward- patible to Legacy Devices (e.g., DS2433) - 256-Bit Scratchpad with Strict Read/Write Protocols Ensures Integrity of Data Transfer - 200k Write/Erase Cycle Endurance at +25°C - Unique Factory-Programmed 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Part Identity - Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise - municates to Host at 15.4kbps or 90kbps Using 1-Wire...