Encyclopedia Entry: 93C66C-I/P

Product Overview

Category

The 93C66C-I/P belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This chip is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers, automotive systems, consumer electronics, and industrial applications.

Characteristics

• Non-volatile: The 93C66C-I/P retains stored data even when power is removed.
• Electrically erasable: The chip allows for easy modification and erasure of stored data.
• High endurance: It can withstand a large number of write and erase cycles.
• Small form factor: The chip comes in a compact package, making it suitable for space-constrained designs.

Package and Quantity

The 93C66C-I/P is available in an 8-pin DIP (Dual In-line Package). It is typically sold in reels or tubes containing multiple units.

Specifications

• Memory capacity: 4 kilobits (512 bytes)
• Operating voltage: 2.5V to 5.5V
• Data retention: Up to 200 years
• Write endurance: Minimum 1 million cycles
• Operating temperature range: -40°C to +85°C

Pin Configuration

The 93C66C-I/P has the following pin configuration:

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| | | 1 8 | | | | 2 7 | | | | 3 6 | | | | 4 5 | |___________| ```

1. Chip Enable (CE): Enables the chip for read/write operations.
2. Output Enable (OE): Controls the output buffer.
3. Serial Data Input (DI): Receives data for programming or reading.
4. Serial Data Output (DO): Outputs programmed or read data.
5. Clock (CLK): Provides timing for data transfer.
6. VCC: Power supply voltage.
7. NC: No connection.
8. Ground (GND): Reference ground.

Functional Features

• Byte-wise Read/Write: Allows individual byte-level access to the memory array.
• Sequential Read: Supports continuous reading of multiple bytes.
• Software Protection: Provides write protection for specific memory areas.
• Chip Erase: Enables erasure of the entire memory content.
• Write Protect Pin (WP): Allows hardware protection against accidental writes.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• Electrically erasable nature allows easy modification of stored data.
• High endurance enables frequent write and erase operations.
• Compact package size suits space-constrained designs.

Disadvantages

• Limited memory capacity compared to other EEPROM variants.
• Slower write and erase times compared to volatile memory technologies.
• Relatively higher cost per bit compared to other non-volatile memory options.

Working Principles

The 93C66C-I/P utilizes a combination of electrically controlled gates and floating gate transistors to store and retrieve data. When writing, an electrical charge is applied to the floating gate, altering its threshold voltage and storing the desired data. Reading involves sensing the voltage level on the floating gate to determine the stored information.

Application Field Plans

The 93C66C-I/P finds applications in various fields, including: 1. Microcontroller-based systems requiring non-volatile memory storage. 2. Automotive electronics for storing critical configuration and calibration data. 3. Consumer electronics like set-top boxes, smart TVs, and audio devices. 4. Industrial automation systems for storing parameter settings and log data.

Alternative Models

1. 93C46C-I/P: A lower capacity variant with 256 bytes of memory.
2. 93C86C-I/P: A higher capacity variant with 1 kilobit (128 bytes) of memory.
3. 93C56C-I/P: A mid-range variant with 384 bytes of memory.

These alternative models offer different memory capacities to suit specific application requirements while maintaining similar functionality and characteristics.

In conclusion, the 93C66C-I/P is a versatile EEPROM chip that provides non-volatile data storage in various electronic devices. Its compact size, high endurance, and ease of use make it a popular choice among designers.