Serial Flash memory chips

16 July 2014 DSP, Micros & Memory

Microchip announced an expansion to its SPI serial Flash memory portfolio, with the introduction of the SST25WF020A, SST25WF040B and SST25WF080B. These devices offer 2, 4 and 8 Mb of memory and are manufactured with Microchip’s SuperFlash technology and NOR Flash cell architecture for high quality and reliability.

With a low operating voltage range from 1,65 to 1,95 V, low power consumption, small footprint and low-profile packaging, the ICs are well suited for battery operated accessories, portable medical devices, and Bluetooth/Wi-Fi-enabled devices such as remotes, headsets and hearing aids.

The memory is partitioned into uniform 4 KB sectors and 64 KB blocks, offering flexible erase capabilities and seamless partitioning for program and data code in the same memory block. Erase and programming features include erasing 4 KB sectors as fast as 40 ms, erasing 64 KB blocks as fast as 80 ms, erasing the entire Flash memory chip in 300 ms, and a programming time of 3 ms for a 256 Byte page.

The devices also offer Fast-Read Dual I/O and typical reliability of 100 000 endurance cycles, with more than 20 years of data retention. The active read current of these devices is typically only 4 mA at 40 MHz, and typical standby current is only 4 μA.

Package options include an 8-pin SOIC and an 8-pin USON (2 x 3 mm) that uses one fifth of the board space. For even stricter space constraints, a chip-scale package is expected to be available in October.

For more information contact Shane Padayachee, Avnet Kopp, +27 (0)11 319 8600, [email protected], www.avnet.co.za

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