AT45DB041E-SHN-T

The AT45DB041E is a 1.65V minimum, serial-interface sequential access Flash memory ideally suited for a wide varietyof digital voice, image, program code, and data storage applications. The AT45DB041E also supports the RapidS serialinterface for applications requiring very high speed operation. Its 4,194,304 bits of memory are organized as 2,048 256 bytes or 264 bytes each. In addition to the main memory, the AT45DB041E also contains two SRAM buffers of256/264 bytes each. The buffers allow receiving of data while main memory is being reprogrammed.Interleaving between both buffers can dramatically increase a system's ability to write a continuous data stream. Inaddition, the SRAM buffers can be used as additional system scratch pad memory, and E2PROM emulation (bit or bytealterability) can be easily handled with a self-contained three step read-modify-write operation.Unlike conventional Flash memories that are accessed randomly with multiple address lines and a parallel interface, theDataFlash uses a serial interface to sequentially access its data. The simple sequential access dramatically reducesactive pin count, facilitates simplified hardware layout, increases system reliability, minimizes switching noise, andreduces package size. The device is optimized for use in many commercial and industrial applications wherehigh-density, low-pin count, low-voltage, and low-power are essential.To allow for simple in-system re-programmability, the AT45DB041E does not require high input voltages forprogramming. The device operates from a single 1.65V to 3.6V power supply for the erase and program and readoperations. The AT45DB041E is enabled through the Chip Select pin (CS) and accessed via a 3-wire interface consistingof the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK).All programming and erase cycles are self-timed.