The Microchip Technology Inc. 25AA1024 is a 1024
Kbit serial EEPROM memory with byte-level and pagelevel
serial EEPROM functions. It also features Page,
Sector and Chip erase functions typically associated
with Flash-based products. These functions are not
required for byte or page write operations. The memory
is accessed via a simple Serial Peripheral Interface
(SPI) compatible serial bus. The bus signals required
are a clock input (SCK) plus separate data in (SI) and
data out (SO) lines. Access to the device is controlled
by a Chip Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused, transitions
on its inputs will be ignored, with the exception of
Chip Select, allowing the host to service higher priority
interrupts.
The 25AA1024 is available in standard packages
including 8-lead PDIP and SOIJ, and advanced 8-lead
DFN package. All devices are Pb-free.