Product 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.
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Features |
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DDC1™/DDC2™ interface compliant for monitor identification
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400 kHz I2C bus compatible
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2.5 to 5.5 Volt Operation
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16-byte Page Write Buffer
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Low Power CMOS Technology
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1,000,000 Program/erase Cycles
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Industrial Temperature Range
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8-lead DIP, SOIC, TSSOP, MSOP or TDFN Packages
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This Device is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant
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Applications |
- VESA™ DDC™ Plug-and-Play Monitors
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