onsemi CAT24C21LI

EEPROM Serial-I2C 1K-bit 128 x 8 3.3V/5V 8-Pin PDIP Tube

128X8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, HALOGEN FREE AND ROHS COMPLIANT, PLASTIC, MS-001, DIP-8

1-kb Dual Mode Serial EEPROM Memory

EEPROM, 128X8, Serial, CMOS, PDIP8

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 Associations (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