AT24CSW040 Series

4Kb I2C compatible 2-wire Serial EEPROM with Software Write Protection and a Pre-programmed Serial Number

Catalog

4Kb I2C compatible 2-wire Serial EEPROM with Software Write Protection and a Pre-programmed Serial Number

Part	Clock Frequency	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Operating Temperature (Min)	Operating Temperature (Max)	Package Name	Memory Format	Package / Case	Mounting Type	Memory Width	Memory Depth	Memory Size	Technology	Write Cycle Time - Word	Write Cycle Time - Page	Memory Type	Access Time	Memory Interface (Type)
Microchip Technology AT24CSW040-UUM0B-T	1 MHz	3.6 V	1.7 V	-40 °C	85 °C	4-WLCSP	EEPROM	4-XFBGA WLCSP	Surface Mount	8 bit	512	4 Kbit	EEPROM	5 ms	5 ms	Non-Volatile	450 ns	I2C
Microchip Technology AT24CSW040-STUM-T	1 MHz	3.6 V	1.7 V	-40 °C	85 °C	TSOT-23-5	EEPROM	SOT-23-5 Thin TSOT-23-5	Surface Mount	8 bit	512	4 Kbit	EEPROM	5 ms	5 ms	Non-Volatile	450 ns	I2C

Catalog

4Kb I2C compatible 2-wire Serial EEPROM with Software Write Protection and a Pre-programmed Serial Number

Description

The Microchip AT24CSW040 is a 4 Kb Serial EEPROM utilizing an I2C (2-wire) serial interface. The device is organized as one block of 512 x 8 and is optimized for use in consumer applications where reliable and dependable nonvolatile memory storage is essential. The device features Software Write Protection, which can be used to write protect 1/4, 1/2, or the entire memory array and also provides the user the capability to make the write protection permanent. Additionally, the AT24CSW040 includes a 256-bit security register separate from the main array. The first half of the security register contains a 128-bit factory-programmed unique serial number while the remaining half is a user programmable and permanently lockable space. The 128-bit serial number is guaranteed unique across the entire CS series of Serial EEPROM products and eliminates the time consuming step of performing and ensuring serialization of a product on a manufacturing line.