93LC66A-I/ST

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93LC66A-I/ST Application Field and Working Principle

Introduction

The 93LC66A-I/ST is an I²C bus programmable Low Vp-p Non-Volatile memory. This device enables reliable data storage in portable alphanumeric, numeric, graphic and combined alphanumeric/graphic display applications.

Product Description

The 93LC66A-I/ST from Microchip Technology is a Serial EEPROM device which uses the popular I²C protocol. It features fast write time of 1 ms based on internal oscillator and has an 8-bit data path for direct access. The device is an ideal solution for portable alphanumeric, numeric, graphic and combined alphanumeric/graphic display applications which require reliable data storage. The device is available in 8-pin PDIP, SOIC, MLP or TSSOP packages.

Features and Benefits

• Serial RAM with SPI and I²C Interface
• User Friendly Programming/Readback Interface
• Fast Write Time (1 ms)
• Very Low Operational Voltage (Vp-p = 1.8V)
• Programmable Over-Temperature Protection
• Flexible 8-bit Data Paths
• Short Access Time: 10µs to 10 ms
• Low Power Consumption
• Lead-free Packages Available

Applications

• Data Storage for Portable Alphanumeric, Numerical and Graphic Displays
• HVAC Systems Control
• Industrial Controls
• Telecommunication Equipment
• Test and Measurement Systems
• Vehicle Dashboard Displays

Working Principle

The 93LC66A-I/ST is an I²C bus compatible device, which works like any other I²C device. The device is connected to the I²C bus using two pins—the Serial Clock (SCL) line, used to synchronize all data transfers, and the Serial Data (SDA) line, used to transfer data. It can communicate with up to four devices on the bus. The communication between slave and master is always initiated by the master, which sends the bus address of the target slave from the first byte, followed by the data bytes. The device can be configured for individual address or for common address (sharing a single address) for multiple devices.

The 93LC66A-I/ST can operate at speeds of up to 10 Mbps, allowing for fast communication with the connected devices. The device supports a wide range of commands which allow for individual address setting, for storing and reading data, for setting the internal status register and for setting over-temperature protection. Data transfer and storage is done byte-wise

Conclusion

The 93LC66A-I/ST is a versatile and low-power Serial EEPROM, ideal for portable applications which require reliable data storage. It is easy to program and has fast write times, allowing for quick updating of stored data. The device supports multiple communication protocols which makes it easy to integrate into existing systems, and its flexibility and power saving capabilities makes it the perfect choice for applications which require reliable, low-power data storage.

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