Encyclopedia Entry: 93LC66CT-I/SN

Product Overview

Category

The 93LC66CT-I/SN belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

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

Characteristics

• Non-volatile: The stored data remains even when power is removed.
• Electrically erasable: Data can be erased and reprogrammed electronically.
• Small form factor: The chip is compact and space-efficient.
• High endurance: It can withstand a large number of erase/write cycles.
• Low power consumption: The chip operates with minimal power requirements.

Package and Quantity

The 93LC66CT-I/SN is available in a small outline integrated circuit (SOIC) 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
• Maximum clock frequency: 2 MHz
• Write endurance: 1 million cycles
• Data retention: 200 years

Pin Configuration

The 93LC66CT-I/SN has a total of 8 pins, each serving a specific function. The pin configuration is as follows:

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

1. Chip Select (/CS): Enables communication with the chip.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Receives data from the external device.
4. Ground (GND): Connects to the ground reference.
5. Serial Data Output (SO): Transmits data to the external device.
6. Write Protect (/WP): Enables or disables write operations.
7. VCC: Power supply voltage input.
8. Hold (/HOLD): Pauses ongoing operations.

Functional Features

• Byte-level Read/Write: Allows individual byte access for efficient data manipulation.
• Sequential Read: Supports continuous reading of multiple bytes without readdressing.
• Software Protection: Write protection feature prevents accidental modification of stored data.
• Self-timed Programming: Automatically manages programming and erase cycles, simplifying operation.

Advantages

• Compact Size: The small form factor makes it suitable for space-constrained applications.
• High Endurance: Withstands frequent read/write operations without degradation.
• Low Power Consumption: Operates efficiently, conserving energy in battery-powered devices.
• Versatile Compatibility: Compatible with a wide range of microcontrollers and electronic systems.

Disadvantages

• Limited Capacity: The 93LC66CT-I/SN has a relatively small memory capacity compared to other EEPROM chips.
• Slower Write Speed: Writing data to the chip may take longer due to its low clock frequency.

Working Principles

The 93LC66CT-I/SN utilizes an electrically controlled floating gate to store and retrieve data. When writing, a high voltage is applied to the gate, allowing electrons to tunnel through the insulating layer and become trapped, representing a logical "1" state. Erasing is achieved by applying a higher voltage, which removes the trapped electrons, reverting the memory cell to a logical "0" state. Reading involves sensing the charge level on the floating gate to determine the stored data.

Application Field Plans

The 93LC66CT-I/SN finds applications in various fields, including: - Automotive electronics: Used for storing configuration data and calibration settings. - Industrial control systems: Provides non-volatile memory for critical parameters and program storage. - Consumer electronics: Enables data storage in devices such as smart TVs, set-top boxes, and gaming consoles.

Alternative Models

For users seeking alternatives to the 93LC66CT-I/SN, the following EEPROM chips can be considered: - 24LC64: Offers higher capacity (8 kilobits) with similar characteristics. - AT24C02: Provides a lower capacity option (256 bytes) suitable for simpler applications. - CAT24C256: Features a larger capacity (32 kilobits) for more extensive data storage requirements.

In conclusion, the 93LC66CT-I/SN is a compact and versatile EEPROM chip that offers non-volatile data storage capabilities. Its high endurance, low power consumption, and compatibility make it suitable for various electronic applications.

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