| The NX25F011B
and NX26F011B 1M-bit Serial Flash memories provide a highly
efficient non-volatile storage solution for applications
with limited power, pins and space. The new Serial Flash
products offer the lowest power (less than 2.5mA active
and 1 microamp standby) and the simplest interface (2
or 4-pins) of any Flash memories available today. They
are offered in a space saving 8-pin SOIC as well as in
alternate packages such as TSOP and removable cards/modules.
NexFlash Serial Flash products
are targeted at emerging serial code-download and battery-operated
data storage applications. "Serial code-download
is by far one of the most compelling trends that the
low-density Flash market is addressing," said Robin
Jigour, vice president of marketing for NexFlash, "As
controllers embed more DRAM or SRAM, program code can
be downloaded upon power-up from external Flash. Ordinary
32 or 48-pin parallel Flash packages impose a significant
overhead. By switching to a 2 or 4-pin Serial Flash
interface, controller pin count, board space, power,
system noise and overall cost can be greatly reduced."
Serial Flash is well suited for code-download in a wide
range of controller-based applications, including disk
drives, DVDs, graphics cards, printers, wireless LANs,
DSL and networking.
The ultra-low power consumption
of NexFlash Serial Flash memories makes them ideal for
battery-operated data storage applications such as internet
appliances, electronic toys, medical equipment, data-loggers,
meters, hand-held terminals, organizers, pagers, radios
and phones. Unlike other low-density Flash memories,
NexFlash uses a patented single-transistor EEPROM technology
that consumes minimal power. "Our new Serial Flash
memories operate at power levels as low as 20% of typical
Flash," said Jigour of NexFlash, "Additionally,
the single-transistor cell makes them a very cost effective
alternative to 1Mb, 512Kb and even 256Kb Serial EEPROMs."
The NX25F011B and NX26F011B Serial
Flash memories operate with a single 5V or 3V (2.7-3.6V)
power supply for erase, write and read operations. Active
power consumption levels are as low as 7.5mW (2.5mA
active @ 3V) with stand-by power at less than 1 microamp.
The NX25F011B supports the popular 4-pin Serial Peripheral
Interface (SPI bus) found on many microcontrollers.
The NX26F011B provides a 2-pin (NXS bus) clock and data
interface. The Serial Flash array is organized as 512
sectors of 264-bytes each. Data can be read at rates
of up to 20MHz. Other features include on-chip SRAM
buffer, byte addressing and hardware/software write
protection. Pin-outs for 8-pin SOIC and 28-pin TSOP
are compatible with some popular Serial Data Flash products.
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