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
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Applications- VESA™ DDC™ Plug-and-Play Monitors
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| CAT24C21WI-GT3 | Active | Pb-free
Halide free | SOIC-8 | 751BD | 1 | Tape and Reel | 3000 | $0.48 |
Specifications
| Product | Type | Density | Organization | Data Transmission Standard | fcycle Max (kHz) | tACC Max ns | VCC Min (V) | VCC Max (V) | Istandby Max (µA) | Iact Max (mA) | T Min (°C) | T Max (°C) |
|---|
| CAT24C21WI-GT3 | Serial | 1 kb | 128 x 8 | I2C | 400 | - | 2.5 | 5.5 | 1 | 1 | -40 | 85 |
