Description
The CAT25010/20/40 are 1−Kb/2−Kb/4−Kb Serial CMOS EEPROM devices internally organized as 128x8/256x8/512x8 bits. They feature a 16−byte page write buffer and support the Serial Peripheral Interface (SPI) protocol. The device is enabled through a Chip Select (CS) input. In addition, the required bus signals are a clock input (SCK), data input (SI) and data output (SO) lines. The HOLD input may be used to pause any serial communication with the CAT25010/20/40 device. These devices feature software and hardware write protection, including partial as well as full array protection.

Features
• 20 MHz (5 V) SPI Compatible
• 1.8 V to 5.5 V Supply Voltage Range
• SPI Modes (0,0) & (1,1)
• 16−byte Page Write Buffer
• Self−timed Write Cycle
• Hardware and Software Protection
• Block Write Protection
   − Protect 1/4, 1/2 or Entire EEPROM Array
• Low Power CMOS Technology
• 1,000,000 Program/Erase Cycles
• 100 Year Data Retention
• Industrial and Extended Temperature Range
• PDIP, SOIC, TSSOP 8−Lead and UDFN 8−Pad Packages
• These Devices are Pb−Free, Halogen Free/BFR Free, and RoHS
   Compliant