Onsemi 1 Kb 1-Wire EEPROM Add-Only Memory, Part #N21C21A | EEPROM | DEX is a 1K−bit serial EPROM containing a factory− programmed, unique 48−bit identification number, 8−bit CRC generation, and the 8−bit family code (09h). A 64−bit status register controls write protection and page redirection. The N21C21A 1−wire interface requires only a single connection and a ground return. The DATA pin is also the sole power source for the N21C21A. The small surface−mount package options saves printed−circuit− board space, while the low cost makes it ideal for applications such as battery pack configuration parameters, record maintenance, asset tracking, product−revision status, and access−code security.

Features: • 1024 Bits of One−Time Programmable (OTP) EPROM For Storage Of User−Programmable Configuration Data • Factory−Programmed Unique 64−Bit Identification Number • Single−Wire Interface to Reduce Circuit Board Routing • Synchronous Communication Reduces Host Interrupt Overhead • No Standby Power Required • 8 byte RAM Buffer (Scratch Pad) • Available in a 3−Pin SOT−23 • This is a Pb−Free Device

Applications: • Security Encoding • Inventory Tracking • Product−Revision Maintenance • Battery−Pack Identification

ONS:N21C21A

N21C21A