Encyclopedia Entry: 93AA66CT-I/ST

Product Overview

Category

The 93AA66CT-I/ST belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used for non-volatile storage in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile memory: The 93AA66CT-I/ST retains data even when power is removed.
• Electrically erasable: The stored data can be erased and reprogrammed electronically.
• Small form factor: The chip is compact and suitable for integration into space-constrained designs.
• High endurance: It supports a large number of write and erase cycles, ensuring long-term reliability.
• Low power consumption: The 93AA66CT-I/ST operates efficiently, minimizing energy consumption.

Package and Quantity

The 93AA66CT-I/ST is available in a surface-mount package. Each package contains a single chip.

Specifications

• Memory capacity: 8 kilobits (1 kilobyte)
• Operating voltage: 2.5V to 5.5V
• Interface: Serial Peripheral Interface (SPI)
• Data retention: Up to 200 years
• Write endurance: Up to 1 million cycles

Pin Configuration

The 93AA66CT-I/ST features an 8-pin configuration with the following pin assignments:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | CS | Chip Select | | 2 | DO | Data Output | | 3 | GND | Ground | | 4 | VCC | Power Supply | | 5 | DI | Data Input | | 6 | CLK | Clock Input | | 7 | WP | Write Protect | | 8 | HOLD | Hold Input |

Functional Features

• Sequential read and write operations: The chip allows for efficient sequential access to stored data.
• Software and hardware protection: Write protection and hold functions ensure data integrity and security.
• Self-timed programming cycle: The chip handles the timing of write and erase operations, simplifying integration.

Advantages

• Compact size enables integration into space-constrained designs.
• High endurance ensures reliable long-term data storage.
• Low power consumption minimizes energy usage.
• Versatile interface (SPI) facilitates easy integration with various microcontrollers.

Disadvantages

• Limited memory capacity compared to other EEPROM chips.
• Relatively slower write and erase speeds compared to some flash memory alternatives.

Working Principles

The 93AA66CT-I/ST utilizes a floating-gate transistor structure to store and retrieve data. It employs an electric field to trap or release electrons in the floating gate, representing binary states (0s and 1s). The stored data can be modified by applying appropriate voltage levels during write and erase operations.

Application Field Plans

The 93AA66CT-I/ST finds applications in various fields, including: - Automotive electronics: Used for storing configuration data, mileage records, and fault codes. - Industrial automation: Enables parameter storage and device configuration in programmable logic controllers (PLCs). - Consumer electronics: Utilized in devices like smart TVs, set-top boxes, and gaming consoles for firmware storage and customization.

Alternative Models

• 93AA66C-I/P: DIP package variant of the same EEPROM chip.
• 93LC66A-I/SN: Similar EEPROM chip with extended temperature range.
• 24AA64T-I/OT: I2C interface compatible EEPROM chip with higher memory capacity.

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