93LC46B/ST

Product Overview

Category

The 93LC46B/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, and consumer electronics.

Characteristics

• Electrically erasable: The 93LC46B/ST can be erased and reprogrammed electronically, making it convenient for updating stored data.
• Non-volatile: The chip retains data even when power is removed.
• Small package size: The chip is available in a compact package, allowing for space-efficient integration into electronic devices.
• High endurance: The 93LC46B/ST offers a high number of write/erase cycles, ensuring long-term reliability.

Package and Quantity

The 93LC46B/ST is typically packaged in a small surface-mount package, such as SOIC (Small Outline Integrated Circuit). It is commonly available in reels or tubes containing multiple units.

Specifications

• Memory capacity: 1 kilobit (128 bytes)
• Operating voltage: 2.5V to 5.5V
• Data retention: Up to 200 years
• Write/erase cycles: Minimum 1 million cycles
• Interface: Serial Peripheral Interface (SPI)

Detailed Pin Configuration

The 93LC46B/ST features an 8-pin package with the following pin configuration:

1. Chip Select (/CS): Enables communication with the chip.
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): Controls the write operation.
6. VCC: Power supply voltage.
7. Ground (GND): Common ground connection.
8. Not Connected (NC): Unused pin.

Functional Features

• Byte-level read/write operations: The 93LC46B/ST allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Sequential read mode: Enables efficient reading of consecutive memory locations.
• Software protection: The chip supports software-based write protection, preventing accidental modification of stored data.
• Self-timed programming cycle: Simplifies the programming process by eliminating the need for external timing control.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for portable devices.
• High endurance ensures reliable data storage over an extended period.
• Easy integration with microcontrollers due to the widely supported SPI interface.

Disadvantages

• Limited memory capacity compared to other EEPROM chips.
• Relatively slower write/erase speed compared to some alternative models.

Working Principles

The 93LC46B/ST utilizes a floating gate transistor structure to store data. When a byte is programmed, charge is trapped in the floating gate, representing a logical "1." Erasing the byte removes the charge, resulting in a logical "0." The state of each memory cell can be read by applying appropriate voltages to the control gates.

Detailed Application Field Plans

The 93LC46B/ST finds applications in various fields, including: 1. Microcontroller-based systems requiring non-volatile memory storage. 2. Automotive electronics for storing critical data like calibration parameters. 3. Consumer electronics, such as set-top boxes and smart home devices, for configuration settings and user preferences.

Alternative Models

Several alternative models with similar functionality to the 93LC46B/ST include: - 24LC01B - AT24C02 - CAT24C01

These models offer comparable memory capacity, interface compatibility, and package options.

In conclusion, the 93LC46B/ST is a versatile EEPROM chip that provides non-volatile data storage in various electronic devices. Its compact size, high endurance, and easy integration make it a popular choice among designers and engineers.

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