Encyclopedia Entry: 93C46B/ST

Product Overview

Category

The 93C46B/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, automotive systems, and consumer electronics.

Characteristics

• Non-volatile: The 93C46B/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.
• Small form factor: The chip is compact in size, making it suitable for integration into space-constrained devices.
• High endurance: It supports a large number of erase/write cycles, ensuring long-term reliability.

Package

The 93C46B/ST is typically available in a small outline integrated circuit (SOIC) package. This package offers ease of handling and compatibility with automated assembly processes.

Essence

The essence of the 93C46B/ST lies in its ability to store and retrieve data reliably in electronic systems, providing a crucial component for non-volatile memory requirements.

Packaging/Quantity

The 93C46B/ST is commonly packaged in reels or tubes, with quantities varying based on customer requirements. Typical packaging options include 2500 units per reel or 100 units per tube.

Specifications

• Memory Capacity: 1 kilobit (128 bytes)
• Supply Voltage: 2.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Interface: Serial (SPI) or Microwire
• Write Time: 5ms (typical)
• Data Retention: 200 years (minimum)

Detailed Pin Configuration

The 93C46B/ST features an 8-pin configuration, as follows:

1. Chip Select (/CS)
2. Serial Clock (SCK)
3. Serial Data Input (SI)
4. Serial Data Output (SO)
5. Write Enable (/W)
6. VCC (Supply Voltage)
7. Ground (GND)
8. Not Connected (NC)

Functional Features

• High-speed data transfer: The chip supports fast serial communication protocols, enabling efficient data transfer between the device and the host system.
• Hardware write protection: The /W pin allows for hardware-based write protection, preventing accidental modification of stored data.
• Sequential read operation: The 93C46B/ST enables sequential reading of memory locations, facilitating efficient access to stored information.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for integration into various electronic devices.
• High endurance ensures reliable long-term data storage.
• Compatibility with multiple interface options provides flexibility in system design.

Disadvantages

• Limited memory capacity may not be sufficient for certain applications requiring larger storage capabilities.
• Higher cost compared to other non-volatile memory technologies, such as flash memory.

Working Principles

The 93C46B/ST utilizes a combination of electrically erasable and programmable memory cells to store data. It employs a serial interface to communicate with the host system, allowing for efficient read and write operations. The chip's internal circuitry manages the erase, program, and read operations, ensuring accurate data storage and retrieval.

Detailed Application Field Plans

The 93C46B/ST finds application in various fields, including: 1. Microcontroller-based systems: Used for storing critical configuration data, calibration values, and firmware updates. 2. Automotive electronics: Employed in vehicle control units for storing vehicle-specific settings, fault codes, and diagnostic information. 3. Consumer electronics: Integrated into devices like smart TVs, set-top boxes, and home appliances for storing user preferences, channel lists, and system settings.

Detailed and Complete Alternative Models

1. 93C46A/ST: Similar to the 93C46B/ST, but with a different pin configuration.
2. 93C56B/ST: Offers higher memory capacity (2 kilobits) while maintaining compatibility with the 93C46B/ST's interface and package.

In conclusion, the 93C46B/ST is a compact and reliable EEPROM chip that provides non-volatile data storage capabilities for a wide range of electronic devices. Its high endurance, small form factor, and compatibility with various interfaces make it a popular choice in the industry. However, its limited memory capacity and relatively higher cost should be considered when selecting alternative models for specific applications.