Encyclopedia Entry: 93LC46AT/SN

Product Overview

Category

The 93LC46AT/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 93LC46AT/SN allows for easy erasure and reprogramming of data without requiring physical removal.
• Non-volatile: The stored data remains intact even when power is disconnected.
• Small package size: The chip is available in a compact SN package, making it suitable for space-constrained applications.
• High endurance: It can withstand numerous read and write cycles, ensuring long-term reliability.
• Low power consumption: The 93LC46AT/SN operates efficiently, minimizing energy usage.

Package and Quantity

The 93LC46AT/SN is typically packaged in a small outline integrated circuit (SOIC) package. It is commonly sold in reels or tubes containing multiple units, with quantities varying based on customer requirements.

Specifications

• Memory capacity: 1 kilobit (128 bytes)
• Operating voltage: 2.5V to 5.5V
• Data retention: Up to 200 years
• Write endurance: Minimum 1 million write cycles
• Operating temperature range: -40°C to +85°C
• Communication interface: Serial Peripheral Interface (SPI)

Pin Configuration

The 93LC46AT/SN features an 8-pin configuration:

1. Chip Select (/CS): Enables communication with the chip when pulled low.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Transfers data from the microcontroller to the chip.
4. Serial Data Output (SO): Transfers data from the chip to the microcontroller.
5. Write Enable (/W): Enables or disables write operations.
6. VCC: Power supply voltage input.
7. Ground (GND): Common ground reference.
8. Not Connected (NC): Unused pin.

Functional Features

• Byte-level Read/Write: The 93LC46AT/SN allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Sequential Read: It supports sequential reading of multiple bytes, enabling efficient retrieval of stored information.
• Hardware Protection: Write protection mechanisms prevent accidental modification of stored data.
• Software Control: The chip can be controlled through software commands, facilitating easy integration into various systems.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for portable devices.
• High endurance ensures reliable data storage over extended periods.
• Easy reprogramming without physical removal simplifies maintenance and updates.
• Compatibility with SPI interface enables seamless integration with existing systems.

Disadvantages

• Limited memory capacity may not suffice for certain applications requiring larger storage.
• Relatively slower data transfer rate compared to other memory technologies.
• Vulnerable to electromagnetic interference due to its small package size.

Working Principles

The 93LC46AT/SN utilizes EEPROM technology, which employs a floating gate transistor structure to store and retrieve data. When writing data, an electric charge is applied to the floating gate, altering its electrical characteristics. This change determines whether the corresponding memory cell represents a logical "0" or "1". During reading, the stored charge is measured, allowing the microcontroller to interpret the stored data.

Application Field Plans

The 93LC46AT/SN finds application in various fields, including: 1. Automotive electronics: Used for storing critical vehicle parameters and configuration data. 2. Industrial automation: Enables storage of calibration data and system settings in control units. 3. Consumer electronics: Utilized for storing user preferences, device configurations, and firmware updates. 4. Medical devices: Stores patient information, device settings, and usage logs.

Alternative Models

Several alternative models with similar functionality to the 93LC46AT/SN include: - 93LC66A/SN - 93LC56A/SN - 93LC86A/SN

These models offer different memory capacities and pin configurations, allowing users to choose the most suitable option based on their specific requirements.

In conclusion, the 93LC46AT/SN is a compact EEPROM chip widely used for non-volatile data storage in various electronic devices. Its small package size, high endurance, and easy reprogramming make it an ideal choice for applications where reliable and flexible data storage is essential.