DS28EC20 20Kb 1-Wire EEPROM

20Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface

Status

Active: In Production.

Description

FULL DATA SHEET (PDF, 456kB)
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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 that is factory lasered into the chip. The registration number is used to address the device in a multidrop 1-Wire net environment.

An evaluation kit is available: DS9090K

Key Features		Applications/Uses
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-Compatible 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 Communicates to Host at 15.4kbps or 125kbps Using 1-Wire Protocol Low-Cost TO-92 Package Operating Range: 5V ��5%, -40��C to +85��C IEC 1000-4-2 Level 4 ESD Protection (8kV Contact, 15kV Air, Typical) for I/O Pin		Card/Module Identification in Rack-Based Systems Device Authentication IEEE 1451.4 Sensors Ink and Toner Cartridge ID Medical and Industrial Sensor Identification/Calibration PCB Identification Smart Cable