CAT24C21

Features:

*DDC1TM/DDC2TM interface compliant for
monitor identification
*400 kHz I ² C 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
* 8-pin DIP, SOIC, TSSOP, MSOP or TDFN
packages
* Industrial temperature range




Pinout






Specifications

Temperature Under Bias .................. -55°C to +125°C
Storage Temperature........................ -65°C to +150°C
Voltage on Any Pin with
Respect to Ground(1)....................-2.0 V to VCC + 2.0 V
VCC with Respect to Ground .............. -2.0 V to +7.0 V
Package Power Dissipation
Capability (TA = 25°C) .................................. 1.0 W
Lead Soldering Temperature (10 seconds) ...... 300°C
Output Short Circuit Current ⁽²⁾ ....................... 100 mA




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 "transmitonly" 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 tran smit-only mode is a read-only mode, while the bi-directional mode is a read and write mode following the I ² C prot ocol. 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.