CAT24C21: 1-kb Dual Mode Serial EEPROM Memory

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.

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
Applications
  • VESA™ DDC™ Plug-and-Play Monitors
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
1-kb Dual Mode Serial EEPROM for VESA¿ ¿Plug-and-Play¿CAT24C21/D (158.0kB)16
Package Drawings (1)
Document TitleDocument ID/SizeRevision
SOIC 8, 150 mils751BD (55.6kB)revo
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT24C21WI-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$0.48
Specifications
ProductTypeDensityOrganizationData Transmission Standardfcycle Max (kHz)tACC Max nsVCC Min (V)VCC Max (V)Istandby Max (µA)Iact Max (mA)T Min (°C)T Max (°C)
CAT24C21WI-GT3Serial1 kb128 x 8I2C400-2.55.511-4085
1-kb Dual Mode Serial EEPROM for VESA¿ ¿Plug-and-Play¿ (158.0kB) CAT24C21
SOIC 8, 150 mils CAV93C86