Spi Serial E2prom With Block Locktm Protection Inc.The X25021 is a CMOS 2048-bit serial E2PROM, inter-
nally organized as 256 x 8. The X25021 features a Serial
Peripheral Interface (SPI) and software protocol allow-
ing operation on a simple three-wire bus. The bus
signals are a Clock input (SCK) plus separate data in (SI)
and data out (SO) lines. Access to the device is con-
trolled through a chip select (CS) input, allowing any
number of devices to share the same bus.
The X25021 also features two additional inputs that
provide the end user with added flexibility. By asserting
the HOLD input, the X25021 will ignore transitions on its
inputs, thus allowing the host to service higher priority
interrupts. The WP input CAN be used as a hardwire input
to the X25021 disabling all write attempts, thus providing
a mechanism for limiting end user capability of altering
the memory.
The X25021 utilizes Xicors proprietary Direct Write
cell, providing a minimum endurance of 100,000 cycles
per byte and a minimum data retention of 100 years. By Intersil Corporation
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X25021 Pb-Free | X25021 Cross Reference | X25021 Schematic | X25021 Distributor |
X25021 Application Notes | X25021 RoHS | X25021 Circuits | X25021 footprint |