16 Mbit SPI Quad I/O Flash for extended-temperature designs
The SST26VF016BT-80E/SM is a 16 Mbit (2M x 8) non-volatile FLASH memory from Microchip's SST26 SQI® series, communicating over an SPI bus with Quad I/O support at up to 80 MHz clock frequency. This combination delivers effective read throughput near 320 Mbps, useful for fast code shadowing or high-speed data logging without a parallel bus. It operates across a wide supply range of 2.3V to 3.6V, making it compatible with both 3.3V and 2.5V logic systems without an extra regulator.
Throughput and timing margins at 80 MHz
The 80 MHz clock with Quad I/O interface means the part can sustain a read throughput of roughly 40 Mbytes/s in Fast Read Quad I/O mode. This is a practical speed for feeding an MCU executing code-in-place or for buffering sensor data in a real-time control loop. The page write time matters for firmware-update cycles — a full 16 Mbit rewrite at 1.5 ms per page (256-byte pages) takes roughly 12 seconds, so plan update intervals accordingly.
The part is available in Tape & Reel (TR) and Cut Tape (CT) options, with the 8-SOIJ (8-SOIC 0.209" width) package being a common footprint for serial Flash.
Package and footprint: 8-SOIJ
The 8-SOIJ (8-SOIC, 0.209" body width, 5.30 mm) package is a narrow-body SOIC variant. The pinout is standard for serial Flash — CS#, SO/SIO1, WP#/SIO2, GND, SI/SIO0, SCK, HOLD#/SIO3, VDD. The 0.050" (1.27 mm) pitch is layout-friendly on two-layer boards. Decoupling: place a 100 nF ceramic capacitor close to VDD pin (pin 8) with a short return via to the ground plane. The supply range 2.3V to 3.6V means the part tolerates a 3.3V rail with ±10% tolerance, but check the minimum voltage at the device during peak current draw (read/write bursts).