M25P80 and M25P16 are 8-Mbit (1M x 8) and 16-Mbit (2M x 8) SPI Serial Flashes. They possess advanced write-in protect mechanism and support SPI’s saving/loading process with a speed around 50MHz; which means they could save programs in RAM rapidly. Using a 4 core-high speed serial interface as a storage interface leads to a smaller package; the number of feet needed is relatively reduced which saved the cost and the circuit board space. Moreover, the number of feet needed for system CPU and ASIC was reduced comparatively.

With the 0.11um manufacturing technology, ST’s design has practiced a storage capacity of 16Mbit on a SO8 packaged bare chip 150mm-wide. The new product comes in other packages; including 5x6mm MLP8. There is also a SO8W package for 208m-wide M25P16. They are all leadless packaged, which conforms to RoHS regulations. STM has various series of serial flashes, of them the new 8-Mbit and 16-Mbit chips are the core products; the storage capacity increased to 128-Mbit from 512-Kbit.

The working voltage of these two new serial flashes ranges from 2.7V to 3.6V and the temperature varies from -40 to +85 Celsius. The software function includes total and sector-delete function, flexible editing and write-in protection, JEDEC and digital signature for identification. Information can be saved for a period of 20 years and each sector can endure 100,000 times of read/write-in.

Currently, the storage capacity of ST’s serial flashes is from 512-Kbit to 128-Mbit; they are: 512-Kbit to 16-Mbit SO8N-packaged, 8-Mbit to 32-Mbit SO8W-packaged, 16-Mbit to 128-Mbit SO16-packaged and 512-Kbit to 128-Mbit MLP8-packaged.