The CAT25C256 is a 256K-Bit SPI Serial CMOS EEPROM internally organized as 32Kx8 bits. Catalyst's advanced CMOS Technology substantially reduces device power requirements. The CAT25C256 features a 64-byte page write Buffer The device operates via the SPI bus serial Interface and is enabled through a Chip Select (CS). In addition to the Chip Select, the Clock input (SCK), data in (SI) and data out (SO) are required to access the device. The HOLD pin may be used to suspend any serial Communication without resetting the serial sequence. The CAT25C256 is designed with software and hardware write protection features including Block Lock protection. The device is available in 8-pin DIP, 8-pin SOIC, 16-pin SOIC, 14-pin TSSOP and 20-pin TSSOP packages.
By Catalyst Semiconductor
CAT25C256 's PackagesCAT25C256 's pdf datasheet

CAT25C256 Pinout, Pinouts
CAT25C256 pinout,Pin out
This is one package pinout of CAT25C256,If you need more pinouts please download CAT25C256's pdf datasheet.

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