AT24CSW020-UUM0B-T Microchip

AT24CSW01X/AT24CSW02X IC-Compatible (Two-Wire) Serial EEPROM with a Security Register and Software Write Protection 1Kbit (128 x 8), 2Kbit (256 x 8) Features Low-Voltage Operation: V = 1.7V to 3.6V CC Internally Organized as 128 x 8 (1K) or 256 x 8 (2K) Software Write Protection of the EEPROM Array: Five configuration options Protection settings can be made permanent 256-Bit Security Register: Preprogrammed 128-bit serial number Additional 16 bytes of free user EEPROM provided to store critical user data Factory Set Hardware Client Address: Unique ordering code for each available client address value (AT24CSW01X/AT24CSW02X) Industrial Temperature Range: -40C to +85C 2 I C-Compatible (Two-Wire) Serial Interface: 100 kHz Standard Mode, 1.7V to 3.6V 400 kHz Fast Mode, 1.7V to 3.6V 1 MHz Fast Mode Plus (FM+), 1.7V to 3.6V Schmitt Triggers, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol Ultra Low Active Current (1 mA maximum) and Standby Current (0.8 A maximum) 8-Byte Page Write Mode: Partial page writes allowed Random and Sequential Read Modes Self-Timed Write Cycle within 5 ms Maximum ESD Protection > 4,000V High Reliability: Endurance: 1,000,000 write cycles Data retention: 100 years Green Package Options (Lead-free/Halide-free/RoHS compliant) Die Sale Option: Wafer Form Packages 5-Lead SOT23 and 4-Ball Ultra-Thin WLCSP Datasheet DS20006396B-page 1 2020-2021 Microchip Technology Inc. and its subsidiaries AT24CSW01X/AT24CSW02X Table of Contents Features......................................................................................................................................................... 1 Packages........................................................................................................................................................1 1. Package Types (not to scale)..................................................................................................................4 2. Pin Descriptions...................................................................................................................................... 5 2.1. Serial Clock (SCL)........................................................................................................................5 2.2. Ground (GND)..............................................................................................................................5 2.3. Serial Data (SDA).........................................................................................................................5 2.4. Device Power Supply (V )......................................................................................................... 5 CC 2.5. Write-Protect (WP)....................................................................................................................... 5 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................................................................................................................................... 18 7.1. Byte Write...................................................................................................................................18 7.2. Page Write..................................................................................................................................18 7.3. Acknowledge Polling.................................................................................................................. 19 7.4. Write Cycle Timing..................................................................................................................... 19 8. Write Protection.....................................................................................................................................21 8.1. Hardware Write Protection......................................................................................................... 21 8.2. Software Write Protection of the EEPROM Array...................................................................... 21 8.3. Writing to the Write Protection Register..................................................................................... 23 8.4. Reading the Write Protection Register.......................................................................................23 9. Read Operations...................................................................................................................................25 9.1. Current Address Read................................................................................................................25 DS20006396B-page 2 Datasheet 2020-2021 Microchip Technology Inc. and its subsidiaries