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  Microchip Technology Semiconductor Electronic Components Datasheet  

AT24CSW027 Datasheet

Serial EEPROM

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AT24CSW01X/AT24CSW02X
I²C-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:
– VCC = 1.7V to 3.6V
• 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: -40°C to +85°C
• I2C-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 μA 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
© 2020-2021 Microchip Technology Inc.
and its subsidiaries
Datasheet
DS20006396B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

AT24CSW027 Datasheet

Serial EEPROM

No Preview Available !

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 (VCC)......................................................................................................... 5
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
© 2020-2021 Microchip Technology Inc.
and its subsidiaries
Datasheet
DS20006396B-page 2


Part Number AT24CSW027
Description Serial EEPROM
Maker Microchip
PDF Download

AT24CSW027 Datasheet PDF






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