Flash Memories Suit Cellular, Paging, Applications

Integrated Silicon Solution, Inc. (ISSI) has released two new flash memory products. The IS25F011A 1-Mb and IS25F041A 4-Mb serial flash memories provide an efficient nonvolatile storage solution for applications with limited power, pins, and space.

The new memory products are designed for battery-powered portable/mobile applications that store voice, text, and data. These applications include cellular/PCS phones, wireless communicators, voice/data pagers, and handheld terminals.

Both memories work from a single +3 or +5 VDC power supply and are manufactured using ISSI's NexFLASH process technology. They consume 5 mA current when running at +3 VDC and less than 1 µA current in standby mode.

The IS25F011A offers 512 sectors while the IS25F041A provides 2048 sectors. Each sector contains 264 B of memory. The flash memories also feature on-chip static random access memory (SRAM) buffers, byte-addressing capabilities, hardware/software write protection, electronic identification functionality, and a 4-pin serial peripheral interface (SPI).

ISSI is offering a development kit for these products. The SFK kit interfaces to a PC's parallel port and provides a hardware and software tool for learning and designing with these flash products.

The serial flash memories are supplied in a 28-pin TSOP type-1 package that measures 8 x 13 mm. The IS25F011A is priced at $3.45 in volume quantities while the IS25F041A is available for $6.56 in volume orders. The development kit is priced at $149.