1-kb Dual Mode Serial EEPROM For VESA™ \"Plug-and-Play\"

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 IC protocol. In write mode the CAT24C21 features a 16-byte page write Buffer The device is available in 8-in DIP, SOIC, TSSOP, MSOP and TDFN packages.
By Catalyst Semiconductor