32Mbit parallel NOR flash for code-shadow and data-logging
The SST39VF3201-70-4I-B3KE is a 32Mbit parallel NOR flash from Microchip's SST39 MPF™ family, organized as 2M x 16 bits. Its 70 ns access time means the CPU reads instructions directly from the flash at zero-wait-state up to about 14 MHz bus speed — beyond that the controller inserts wait cycles. That makes it a fit for microcontroller boot memories, FPGA configuration storage, and firmware-updateable code shadow in industrial controllers.
Supply, temperature, and write-cycle timing
Word- and page-write cycle time is 10 µs, so a full-sector rewrite takes milliseconds, not seconds, which matters for field-update windows.
Package and board-fit: 48-TFBGA
Supplied in a 48-ball TFBGA (thin fine-pitch ball grid array) — the 0.80 mm ball pitch requires a 4-layer PCB for fan-out. The surface-mount footprint is standard for this density class; no exposed thermal pad, so the board copper plane under the package handles heat dissipation. Supplied in tray format, not tape-and-reel, so pick-and-place feeders need a tray handler or a tube-to-tape conversion.
Active lifecycle and compliance documentation
RoHS3 compliant (directive 2015/863), with no halogen or lead restrictions beyond the exemption list. No UL or IEC certification is carried on this product class; the manufacturer provides a standard datasheet and PCN notifications for any process or die changes.