10 pcs Atmel 93c66  3-wire Serial EEPROM Memory 8pin DIP 2.7V to 5.5V 93c66PC AT93c66

The AT93C46/56/66 provides 1024/2048/4096 bits of serial electrically erasable programmable read-only memory (EEPROM), organized as 64/128/256 words of 16 bits each (when the ORG pin is connected to VCC), and 128/256/512 words of 8 bits each (when the ORG pin is tied to ground). The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operations are essential.

The AT93C46/56/66 is enabled through the Chip Select pin (CS) and accessed via a three-wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the address is decoded and the data is clocked out serially on the DO pin. The Write cycle is completely self-timed, and no separate Erase cycle is required before Write. The Write cycle is only enabled when the part is in the Erase/Write Enable state. When CS is brought high following the initiation of a Write cycle, the DO pin outputs the Ready/Busy status of the part.

SPECIFICATIONS

• Operating Voltage

– 2.7 (VCC = 2.7V to 5.5V)

• User-selectable Internal Organization

– 4K: 512 x 8 or 256 x 16

• Three-wire Serial Interface
• 2 MHz Clock Rate (5V)
• Self-timed Write Cycle (10 ms max)
• High Reliability

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

• Automotive Grade
• 8-lead PDIP

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

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