Encyclopedia Entry: 93LC46CT-E/SN

Product Overview

Category

The 93LC46CT-E/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 93LC46CT-E/SN can be erased and reprogrammed electronically, making it convenient for updating stored data.
• Non-volatile: The chip retains its stored data even when power is removed.
• Compact package: It comes in a small surface mount package, making it suitable for space-constrained applications.
• High endurance: The chip has a high number of erase/write cycles, ensuring long-term reliability.

Package and Quantity

The 93LC46CT-E/SN is available in a surface mount package. It is typically sold in reels or tubes containing a specific quantity, such as 2500 units per reel.

Specifications

• Memory capacity: 1 kilobit (128 bytes)
• 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 93LC46CT-E/SN chip has a total of 8 pins, each serving a specific function:

1. Chip Select (/CS): Enables communication with the chip.
2. Serial Clock (CLK): Provides timing for data transfer.
3. Serial Data Input (DI): Receives data during write operations.
4. Serial Data Output (DO): Outputs data during read operations.
5. Write Enable (/W): Controls write operations.
6. VCC: Power supply voltage.
7. VSS: Ground reference.
8. NC: No connection (unused pin).

Functional Features

• Byte-level Read/Write: The chip allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Sequential Read: It supports sequential reading of multiple bytes, reducing access time.
• Hardware Write Protection: The 93LC46CT-E/SN includes a write protection mechanism to prevent accidental modification of stored data.
• Self-Timed Programming: The chip automatically manages the timing of write and erase operations, simplifying the programming process.

Advantages and Disadvantages

Advantages

• Compact size and surface mount package make it suitable for space-constrained applications.
• High endurance ensures reliable long-term data storage.
• Electrically erasable nature allows for easy data updates.
• Sequential read feature enhances data access speed.

Disadvantages

• Limited memory capacity compared to other EEPROM chips.
• Requires external microcontroller or interface circuitry for communication.

Working Principles

The 93LC46CT-E/SN utilizes a combination of electronic circuits and memory cells to store and retrieve data. It employs a floating gate transistor structure that can be electrically programmed and erased. When data is written, charges are trapped in the floating gate, altering the transistor's behavior. During read operations, the stored charges are detected, allowing the retrieval of the stored data.

Application Field Plans

The 93LC46CT-E/SN finds application in various fields, including: 1. Microcontrollers: Used for storing configuration settings, calibration data, and firmware updates. 2. Computers: Employed in BIOS chips for storing system parameters and boot code. 3. Consumer Electronics: Integrated into devices like smart TVs, set-top boxes, and audio systems for storing user preferences and settings.

Alternative Models

Several alternative models with similar functionality to the 93LC46CT-E/SN include: - 93LC46B-I/SN - 93LC46C-I/SN - 93LC46BT-I/SN

These models offer comparable specifications and pin configurations, providing flexibility in choosing the most suitable option for specific applications.

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