16 Mbit SPI DataFlash with 528-byte page architecture
The AT45DB161E-SHF-T is a 16 Mbit SPI serial Flash from the AT45DB DataFlash family, organized as 528 bytes per page across 4096 pages. It operates from a 2.3 V to 3.6 V supply and supports SPI clock rates up to 85 MHz. The 8-SOIC package suits space-constrained designs in industrial control, sensor logging, and firmware-over-the-air staging.
85 MHz SPI bus — timing margin for the host controller
At 85 MHz, the SPI interface delivers a sustained read throughput that keeps the host processor fed without wait states, provided the board layout keeps trace capacitance under 15 pF. The 528-byte page size is non-standard — most SPI Flash uses 256-byte pages — so the filesystem or bootloader must handle the larger granularity for writes and erases.
Active lifecycle — no last-time-buy pressure
This part carries an Active lifecycle status per the manufacturer, ROHS3 compliant. The wide supply range and industrial temperature grade cover most embedded applications without requiring a second-sourced alternate.