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24C21

ATMELCorporation
Part Number 24C21
Manufacturer ATMELCorporation
Description 2-Wire Serial EEPROM
Published Mar 23, 2005
Detailed Description Features • • • • • • • • • • 2-Wire Serial Interface Schmitt Trigger, Filtered Inputs For Noise Suppression DDC1™/ DDC2™...
Datasheet PDF File 24C21 PDF File

24C21
24C21


Overview
Features • • • • • • • • • • 2-Wire Serial Interface Schmitt Trigger, Filtered Inputs For Noise Suppression DDC1™/ DDC2™ Interface Compliant for Monitor Identification Low Voltage Operation – 2.
5 (VCC = 2.
5V to 5.
5V) Internally Organized 128 x 8 100 kHz (2.
5V) Compatibility 8-Byte Page Write Mode Write Protection Available Self-timed Write Cycle (10 ms max) High Reliability – Endurance: 1 Million Write Cycles – Data Retention: 100 Years – ESD Protection: >3000V 8-Pin PDIP and JEDEC SOIC Packages 2-Wire Serial EEPROM 1K (128 x 8) • Description The AT24C21 provides 1024 bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 128 words of 8 bits each.
The device is optimized for use in applications requiring data storage and serial transmission of configuration and control information.
The AT24C21 features two modes of operation: Transmit-Only Mode and Bidirectional Mode.
Upon power-up, the AT24C21 will be in the Transmit-Only Mode, sending a serial-bit stream of the entire memory contents, clocked via the VCLK pin.
The Bidirectional Mode is selected by a valid high-to-low transition on the SCL pin and offers byte selectable read/write capability of the entire memory array.
The AT24C21 is available in space saving 8-pin PDIP and 8-pin SOIC packages.
AT24C21 Pin Configurations Pin Name NC SDA SCL VCLK Function No Connect Serial Data Serial Clock Input (Bidirectional Mode) Serial Clock Input (Transmit-Only Mode) 8-Pin PDIP 8-Pin SOIC 2-Wire, 1K Serial EEPROM Rev.
0405E–07/98 1 Absolute Maximum Ratings* Operating Temperature .
.
.
-55°C to +125°C Storage Temperature .
-65°C to +150°C Voltage on Any Pin with Respect to Ground .
.
-1.
0V to +7.
0V Maximum Operating Voltage.
.
.
6.
25V DC Output Current.
5.
0 mA *NOTICE: Stresses beyond those liste...


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