Encyclopedia Entry: 93LC56AT-I/SN

Product Overview

Category

The 93LC56AT-I/SN 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, computers, and consumer electronics.

Characteristics

• Electrically erasable: The 93LC56AT-I/SN can be erased and reprogrammed electronically, allowing for flexibility in data storage.
• Non-volatile: The stored data remains intact even when power is removed.
• Small package size: The chip is available in a compact package, making it suitable for space-constrained applications.
• High endurance: It offers a high number of erase/write cycles, ensuring long-term reliability.

Package and Quantity

The 93LC56AT-I/SN is typically packaged in a small outline integrated circuit (SOIC) package. It is supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Memory capacity: 2 kilobits (256 x 8 bits)
• Supply voltage: 2.5V to 5.5V
• Operating temperature range: -40°C to +85°C
• Data retention: Up to 200 years
• Write endurance: Minimum 1 million cycles

Pin Configuration

The 93LC56AT-I/SN chip has a total of 8 pins, each serving a specific function:

1. Chip Select (/CS): Enables or disables the chip for communication.
2. Serial Clock (CLK): Controls the timing of data transfer.
3. Serial Data Input (DI): Receives data during write operations.
4. Serial Data Output (DO): Transmits data during read operations.
5. Write Protect (/WP): Allows protection against accidental write operations.
6. VCC: Power supply input.
7. Ground (GND): Common ground connection.
8. Hold (/HOLD): Pauses ongoing operations when pulled low.

Functional Features

• Sequential read and write operations: The chip supports sequential access to memory locations, allowing efficient data retrieval and storage.
• Hardware write protection: The /WP pin can be used to prevent accidental modification of stored data.
• Self-timed programming cycle: The 93LC56AT-I/SN automatically manages the timing of write and erase operations, simplifying the integration process.
• High-speed operation: It offers fast data transfer rates, enabling quick access to stored information.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for portable devices.
• Electrically erasable nature allows for easy updates and modifications.
• High endurance ensures reliable and long-lasting data storage.
• Wide operating voltage range enhances compatibility with various systems.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively slower read and write speeds compared to some alternatives.
• Susceptible to electromagnetic interference, requiring proper shielding in sensitive applications.

Working Principles

The 93LC56AT-I/SN utilizes a floating gate transistor structure to store data. When programmed, charge is trapped in the floating gate, representing a logical "1." Erasing the chip removes the charge, resulting in a logical "0." The state of each memory cell is determined by the presence or absence of charge in its corresponding floating gate.

During read operations, the chip applies appropriate voltages to the memory cells and senses the resulting current flow to determine the stored data. Write operations involve applying higher voltages to enable charge injection into the floating gates, while erase operations use higher voltages to remove the trapped charge.

Application Field Plans

The 93LC56AT-I/SN finds applications in various fields, including: 1. Automotive electronics: Used for storing critical data like calibration settings and vehicle identification information. 2. Industrial control systems: Enables non-volatile storage of configuration parameters and system status data. 3. Consumer electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for firmware storage and data logging.

Alternative Models

For those seeking alternatives to the 93LC56AT-I/SN, several similar EEPROM chips are available on the market. Some notable alternatives include: - 24LC256: Offers higher storage capacity (32 kilobits) while maintaining compatibility with the I2C interface. - AT25080A: Provides a wider operating voltage range (1.8V to 5.5V) and faster write speeds compared to the 93LC56AT-I/SN. - CAT24C02: Suitable for low-power applications, featuring ultra-low standby current consumption.

In conclusion, the 93LC56AT-I/SN is a versatile EEPROM chip that combines electrically erasable memory with compact size and high endurance. Its application spans across automotive,