Summary
1 kb Dual Mode Serial EEPROM for VESA ?쏱lug-and-Play? September, 2009 ??Rev. 16
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.