SAN JOSE, CALIF. Atmel Corp. has taken the wraps off its 64-Mbit DataFlash memory, the AT45DB642, and promises 128- and 256-Mbit parts will follow. Applications for high-density flash memory include MP3 players, digital cameras, cellular phones with Internet access, memory cards, palmtop computers and PDAs, said Richard De Caro, director of marketing for DataFlash products.
The 64-Mbit offering is a dual-interface flash memory that melds dedicated serial and parallel interfaces into a single device. The dual-interface architecture permits the DataFlash to reside on two distinct system buses and allows interoperability between the DataFlash and multiple processors and controllers, Atmel said.
For example, De Caro said the dual-interface architecture allows DataFlash to communicate serially with a DSP to store processed voice and text data while the parallel interface communicates with a microcontroller to send display data to an LCD.
"The dual interface of the DataFlash is valuable because the parallel ports on the DSP need to be used for other functions," he added, "so the serial interface of the DataFlash offloads the necessity of sharing parallel ports and reduces overall system overhead."
De Caro said the memory architecture features extremely small page sizes and dual internal SRAM buffers. "It offers much of the flexibility of an E2PROM while maintaining the cost advantages of flash," he said. The size of the software drivers for the DataFlash can be 25 to 40 percent smaller than those necessary for other flash solutions, according to the company.
The 64-Mbit DataFlash is being manufactured on Atmel's 0.25-micron CMOS process but will transition to an 0.18-micron process in 2001. The device is offered in a 40-lead thin small-outline package in both commercial and industrial temperature ranges. Devices operate from a single 2.7-volt-only power supply. Next-generation devices will operate from a single 1.8-V supply.
The 64-Mbit flash is priced from $28.80 in 1,000-piece quantities.
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EETInfo No. 613