AT24CM02 IC-Compatible (Two-Wire) Serial EEPROM 2Mbit (262,144 x 8) Features Low-Voltage and Standard-Voltage Operation: V = 1.7V to 5.5V CC V = 2.5V to 5.5V CC Internally Organized as 262,144 x 8 (2 Mbit) Industrial Temperature Range: -40C to +85C 2 I C-Compatible (Two-Wire) Serial Interface: 100 kHz Standard Mode, 1.7V to 5.5V 400 kHz Fast Mode, 1.7V to 5.5V 1 MHz Fast Mode Plus (FM+), 2.5V to 5.5V Schmitt Triggers, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol Write-Protect Pin for Full Array Hardware Data Protection Ultra Low Active Current (3 mA maximum) and Standby Current (3 A maximum) 256-byte Page Write Mode: Byte write and partial page writes allowed Random and Sequential Read Modes Self-Timed Write Cycle: All write operations complete within 10 ms maximum Built-in Error Detection and Correction High Reliability: Endurance: 1,000,000 write cycles Data retention: 100 years Green Package Options (Lead-free/Halide-free/RoHS compliant) Die Sale Options: Wafer Form and Bumped Wafers Packages 8-Lead SOIC and 8-Ball WLCSP Datasheet DS20006197C-page 1 2019-2021 Microchip Technology Inc. AT24CM02 Table of Contents Features......................................................................................................................................................... 1 Packages........................................................................................................................................................1 1. Package Types (not to scale)..................................................................................................................4 2. Pin Descriptions...................................................................................................................................... 5 2.1. Device Address Input (A2)........................................................................................................... 5 2.2. Ground......................................................................................................................................... 5 2.3. Serial Data (SDA).........................................................................................................................5 2.4. Serial Clock (SCL)........................................................................................................................5 2.5. Write-Protect (WP)....................................................................................................................... 6 2.6. Device Power Supply................................................................................................................... 6 3. Description.............................................................................................................................................. 7 3.1. System Configuration Using Two-Wire Serial EEPROMs ...........................................................7 3.2. Block Diagram..............................................................................................................................8 4. Electrical Characteristics.........................................................................................................................9 4.1. Absolute Maximum Ratings..........................................................................................................9 4.2. DC and AC Operating Range.......................................................................................................9 4.3. DC Characteristics....................................................................................................................... 9 4.4. AC Characteristics......................................................................................................................10 4.5. Electrical Specifications..............................................................................................................11 5. Device Operation and Communication................................................................................................. 13 5.1. Clock and Data Transition Requirements...................................................................................13 5.2. Start and Stop Conditions.......................................................................................................... 13 5.3. Acknowledge and No-Acknowledge...........................................................................................14 5.4. Standby Mode............................................................................................................................ 14 5.5. Software Reset...........................................................................................................................14 6. Memory Organization............................................................................................................................16 6.1. Device Addressing..................................................................................................................... 16 7. Write Operations................................................................................................................................... 17 7.1. Byte Write...................................................................................................................................17 7.2. Page Write..................................................................................................................................17 7.3. Internal Writing Methodology......................................................................................................18 7.4. Acknowledge Polling.................................................................................................................. 18 7.5. Write Cycle Timing..................................................................................................................... 19 7.6. Write Protection..........................................................................................................................19 8. Read Operations...................................................................................................................................21 8.1. Current Address Read................................................................................................................21 8.2. Random Read............................................................................................................................ 21 8.3. Sequential Read.........................................................................................................................22 DS20006197C-page 2 Datasheet 2019-2021 Microchip Technology Inc.