Microchip AT24CSW040-STUM-T, 4Kbit I2C serial EEPROM, 512 x 8 organization, 1 MHz clock, 450 ns access, 1.7V–3.6V supply, -40°C to 85°C, TSOT-23-5 package.
| Parameter / Attribute | Specification / Value |
|---|---|
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 1.7V ~ 3.6V |
| Clock frequency | 1 MHz |
| Memory interface | I²C |
| Operating temperature | -40°C ~ 85°C (TC) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Technology | EEPROM |
| Access time | 450 ns |
| Memory size | 4Kbit |
| Memory format | EEPROM |
| Case | SOT-23-5 Thin, TSOT-23-5 |
| Memory organization | 512 x 8 |
| Write cycle time - word, page | 5ms |
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The Microchip AT24CSW040-STUM-T is a 4Kbit serial EEPROM organized as 512 x 8 bits, accessed through an I2C interface. The 1 MHz clock frequency and 450 ns access time keep bus transactions fast enough for most configuration-storage and parameter-logging tasks.
It is not specified for the extended automotive under-hood range (125°C), so designs requiring that grade should look at the AEC-Q100 qualified siblings in the AT24 family.
It is RoHS3 compliant.
The closest functional peer is the AT24C04C-XHM-T, also a 4Kbit I2C EEPROM in a similar package, but with a 550 ns access time versus the 450 ns of this part. The AT24C04D-MAHM-E is another 4Kbit I2C option with a 4.5 µs access time — slower, but in a different package variant. Neither is a drop-in replacement without verifying the pinout and timing for your specific board.
No. The supply voltage range is 1.7V to 3.6V, so 5V logic levels exceed the absolute maximum ratings. Use level translation if the host controller runs at 5V.