AT45DQ321-SHF2B-T, 32Mbit SPI FLASH, 104 MHz, 2.3V-3.6V, 8-SOIC, -40°C to 85°C, Tape & Reel.
| Parameter | Value |
|---|---|
| Memory type | Non-Volatile |
| Mounting type | Surface Mount |
| Voltage | 2.3V ~ 3.6V |
| Frequency | 104 MHz |
| Memory interface | SPI |
| Operating temperature | -40°C ~ 85°C (TC) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Technology | FLASH |
| Memory size | 32Mbit |
| Memory format | FLASH |
| Case | 8-SOIC (0.209\", 5.30mm Width) |
| Memory organization | 512 Bytes x 8192 pages |
| Write cycle time - word, page | 8µs, 4ms |
The AT45DQ321-SHF2B-T: 32 Mbit serial SPI Flash organised as 512 bytes per page across 8192 pages. Runs at 104 MHz clock over the SPI bus. 8-SOIC package.
Page write completes in 8 µs, full sector erase takes 4 ms. 512-byte page size.
AT45DQ321-SHF2B-T is a newer-generation DataFlash with a 104 MHz SPI clock, compared to 85 MHz for the AT45DB321E variants. The page organisation differs (512 bytes vs 528 bytes), so the firmware's page-addressing logic needs updating. The pinout and package are the same 8-SOIC, making it a drop-in replacement at the board level with a software change.
Yes, the supply range of 2.3 V to 3.6 V covers 3.3 V logic directly. No level shifter is needed when connecting to a 3.3 V MCU SPI port.
The closest functional alternative is the AT45DQ321-SHFHJ-T, which shares the same 32 Mbit density, 104 MHz SPI speed, 8-SOIC package, and page organisation. It is a tape-and-reel variant with the same electrical specs, suitable as a dual-source option for supply resilience.