Encyclopedia Entry: 93C86B-I/ST

Product Overview

Category

The 93C86B-I/ST 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 memory: The 93C86B-I/ST retains stored data even when power is removed.
• Electrically erasable: Data can be erased and reprogrammed electronically, eliminating the need for physical removal or replacement.
• High storage capacity: This chip has a storage capacity of 8 kilobits (1 kilobyte).
• Low power consumption: The 93C86B-I/ST operates on low power, making it suitable for battery-powered devices.
• Wide temperature range: It can operate reliably in temperatures ranging from -40°C to +85°C.

Package and Quantity

The 93C86B-I/ST is available in an SOIC-8 package. Each package contains one chip.

Specifications

• Memory Capacity: 8 kilobits (1 kilobyte)
• Interface: Serial Peripheral Interface (SPI)
• Supply Voltage: 2.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 million cycles
• Data Retention: 200 years

Pin Configuration

The 93C86B-I/ST chip has 8 pins arranged as follows:

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

1. Chip Select (CS): Enables the chip for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Data Input (DI): Receives data to be written into the memory.
4. Data Output (DO): Outputs data read from the memory.
5. VCC: Supply voltage input.
6. Write Protect (WP): Allows or prevents write operations.
7. Ground (GND): Ground reference for the chip.
8. Not Connected (NC): Unused pin.

Functional Features

• High-Speed Operation: The 93C86B-I/ST supports fast read and write operations, allowing for efficient data access.
• Sequential Read: It enables sequential reading of multiple memory locations, reducing access time.
• Software Protection: The write protect pin (WP) can be used to prevent accidental modification of stored data.
• Self-Timed Programming: The chip automatically manages programming timing, simplifying the integration process.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• Electrically erasable and reprogrammable, eliminating the need for physical replacement.
• Wide temperature range allows for reliable operation in various environments.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively slower write speeds compared to some alternative models.
• Requires a dedicated serial interface for communication.

Working Principles

The 93C86B-I/ST utilizes EEPROM technology to store data. It consists of an array of floating-gate transistors that can be electrically programmed and erased. When data is written, charges are trapped in the floating gates, representing binary information. These charges can be removed during the erase cycle, allowing new data to be written.

The chip communicates with the host device using the Serial Peripheral Interface (SPI) protocol. The host sends commands and data to the chip, which then performs the requested operations, such as reading or writing data.

Application Field Plans

The 93C86B-I/ST finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and calibration parameters.
2. Automotive Systems: Employed in electronic control units (ECUs), instrument clusters, and infotainment systems.
3. Consumer Electronics: Integrated into smart devices, set-top boxes, and gaming consoles for data storage.
4. Industrial Applications: Utilized in industrial automation, measurement equipment, and control systems.

Alternative Models

• 93C66B-I/ST: Similar to the 93C86B-I/ST but with a smaller memory capacity of 4 kilobits.
• 93C56B-I/ST: Another alternative with a reduced memory capacity of 2 kilobits.
• 93C46B-I/ST: Offers the smallest memory capacity of 1 kilobit among the alternatives