ANV31A81WSC66 T vs ANV31A81WSC66 R vs ANV31A81WSK66 R

PartNumber	ANV31A81WSC66 T	ANV31A81WSC66 R	ANV31A81WSK66 R
Description	NVRAM Non volatile 66 MHz 256Kb nvSRAM SPI interface	NVRAM Non volatile 66 MHz 256Kb nvSRAM SPI interface	NVRAM Non volatile 66 MHz 256Kb nvSRAM SPI interface