Encyclopedia Entry: 93LC56AT/ST

Product Overview

Category

The 93LC56AT/ST 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: Retains stored data even when power is removed.
• Electrically erasable: Allows for easy modification of stored data.
• Programmable: Can be written and rewritten multiple times.
• Compact package: Available in a small form factor suitable for integration into various electronic systems.

Package and Quantity

The 93LC56AT/ST is typically packaged in a surface-mount technology (SMT) package, which facilitates its integration onto printed circuit boards (PCBs). It is commonly available in reels or tubes containing a specified quantity of chips.

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: 1 million write cycles

Pin Configuration

The 93LC56AT/ST features an 8-pin dual in-line package (DIP) with the following pin configuration:

┌───┬───┐ │ 1 │ 8 │ │ 2 │ 7 │ │ 3 │ 6 │ │ 4 │ 5 │ └───┴───┘

Pin Description: 1. Chip Select (/CS): Enables communication with the chip. 2. Serial Clock (CLK): Provides the clock signal for data transfer. 3. Serial Data Input (DI): Receives data to be written into the memory. 4. Ground (GND): Reference ground for the chip. 5. Serial Data Output (DO): Outputs read data from the memory. 6. Write Enable (/WE): Enables or disables write operations. 7. VCC: Power supply voltage input. 8. Not Connected (NC): Unused pin.

Functional Features

• Byte-level Read/Write Operations: Allows individual bytes of data to be read from or written to the memory.
• Sequential Read: Supports sequential reading of multiple bytes without requiring repeated address inputs.
• Self-Timed Programming: Automatically manages programming and erase cycles, simplifying the integration process.
• Hardware Protection: Provides write protection options to prevent accidental modification of stored data.

Advantages and Disadvantages

Advantages: - Non-volatile storage ensures data retention even during power loss. - Electrically erasable nature allows for easy updates and modifications. - Compact package size enables integration in space-constrained designs. - High endurance with up to 1 million write cycles.

Disadvantages: - Limited storage capacity compared to other memory technologies. - Relatively slower read/write speeds compared to volatile memory types. - Sensitive to electrical noise and voltage fluctuations.

Working Principles

The 93LC56AT/ST utilizes a floating-gate transistor structure to store data. It employs a combination of electric fields and charge trapping mechanisms to retain information even when power is removed. The stored data can be modified by applying specific voltage levels to the memory cells, allowing for both erasing and writing operations.

Application Field Plans

The 93LC56AT/ST finds applications in various fields, including: 1. Microcontroller-based systems: Used for storing configuration settings, calibration data, and firmware updates. 2. Automotive electronics: Employed in electronic control units (ECUs) for storing critical data, such as vehicle identification information and fault codes. 3. Industrial automation: Utilized in programmable logic controllers (PLCs) to store program instructions and system parameters. 4. Consumer electronics: Integrated into devices like smart TVs, set-top boxes, and gaming consoles for storing user preferences and settings.

Alternative Models

1. 93LC56B/ST: Similar specifications but with extended temperature range (-40°C to +125°C).
2. 93LC56C/ST: Higher memory capacity (4 kilobits) with the same pin configuration and package type.
3. 93LC56D/ST: Lower supply voltage range (1.8V to 5.5V) for low-power applications.

Note: This is not an exhaustive list, and there may be other alternative models available from different manufacturers.

In conclusion, the 93LC56AT/ST is a versatile EEPROM chip that offers non-volatile data storage, ease of programming, and compact packaging. Its functional features, advantages, and application field plans make it suitable for various electronic systems requiring reliable and flexible memory solutions.