Not Recommended for New Design. For new designs use AT25DF161.16-Mbit, 66 MHz Serial Firmware DataFlash®, SPI Mode 0 and
3 Compatible, Byte and Page Program, Block Erase (4KB, 32KB and 64KB) and Ch...
Embedded AVR Microcontroller with LF-receiver operating at typically 125kHz. The active UHF-transmitters frequency is crystal
defined and in the range between 432 and 448MHz.