描述 Description

The CAT24C21 is a 1 kb Serial CMOS EEPROM internally organized as 128 words of 8 bits each. The device complies with the Video Electronics Standard Association’s (VESA?), Display Data Channel (DDC?) standards for “Plug?and?Play” monitors. The “transmit?only” mode (DDC1?) is controlled by the VCLK clock input and the “bi?directional” mode (DDC2?) is controlled by the SCL clock input, with both modes sharing a common SDA input/output (I/O). The transmit?only mode is a read?only mode, while the bi?directional mode is a read and write mode following the I2C protocol. In write mode the CAT24C21 features a 16?byte page write buffer. The device is available in 8?lead DIP, SOIC, TSSOP, MSOP and TDFN packages.

特性 Features

? DDC1/DDC2 Interface Compliant for Monitor Identification

? 400 kHz I2C Bus Compatible

? 2.5 to 5.5 Volt Operation

? 16?byte Page Write Buffer

? Hardware Write Protect

? Low Power CMOS Technology

? 1,000,000 Program/Erase Cycles

? 100 Year Data Retention

? Industrial Temperature Range

? 8?lead DIP, SOIC, TSSOP, MSOP or TDFN Packages

? This Device is Pb?Free, Halogen Free/BFR Free, and RoHS Compliant