93LC66 Series 4 Kbit (256 x 16) 5.5 V Microwire Compatible Serial EEPROM -SOIC-8

93LC66B-I/SN – 4 Kbit Microwire Serial EEPROM – Microchip Technology

This 93LC66B-I/SN from Microchip Technology is a reliable 4 Kbit serial EEPROM memory IC, designed for non-volatile data storage in a wide range of electronic applications. Offering a simple Microwire-compatible interface and low-power operation, it is an ideal solution for storing configuration data, calibration settings, and other critical information. PCX supplies this component with guaranteed quality, fast shipping, and dedicated customer support.

Key Features

• Capacity: 4 Kbit (organized as 256 x 16)
• Interface: Microwire (3-wire serial)
• Voltage Range: Operates from 2.5V to 5.5V
• Package: SOIC-8, suitable for automated assembly
• Endurance: 1,000,000 erase/write cycles
• Data Retention: 200 years

Technical Details

The 93LC66B-I/SN is organized as 256 words of 16 bits each. It features a simple serial interface (CS, SK, DI, DO) that is compatible with the Microwire protocol, making it easy to interface with a host of microcontrollers and processors. It operates over an industrial temperature range of -40°C to +85°C, ensuring reliability in demanding environments. A built-in write-protect feature and sequential read capability enhance data integrity and access efficiency.

Applications

• Consumer electronics for storing user settings and preferences
• Industrial control systems for parameter and calibration storage
• Automotive modules for non-volatile memory requirements
• Medical devices for data logging and device configuration
• Telecommunications equipment

About the Manufacturer

Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions. The company is known for its easy-to-use development tools and comprehensive product portfolio, which helps customers create innovative, differentiated, and secure products while reducing total system cost and time to market.

With a strong commitment to quality and reliability, Microchip has built a reputation for delivering high-performance, low-risk product development, and production solutions. Their components are trusted by engineers worldwide for critical applications across a multitude of industries, from automotive and industrial to consumer and computing.

About Serial EEPROMs

Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) is a type of non-volatile memory used for storing small amounts of data that must be saved when power is removed. Unlike parallel EEPROMs, they use a serial interface (like I²C, SPI, or Microwire), which requires fewer I/O pins on a microcontroller, making them ideal for space-constrained and cost-sensitive designs.

These memory ICs are fundamental for storing device-specific parameters, calibration constants, security codes, and user settings. Their reliability, endurance, and low power consumption make them a ubiquitous component in modern electronics, ensuring that vital information is retained reliably for the lifetime of the product.

Packaging Options

This component is available for order in standard packaging formats to suit your production needs, including Tape and Reel for high-volume automated assembly.

Frequently Asked Questions (FAQs)

Question: What is the difference between the 93LC66 and other EEPROMs in the 93 series?

Answer: The part number denotes the organization and capacity. The “66” in 93LC66 indicates a 4 Kbit memory organized as 256 x 16. Other variants have different organizations (e.g., 256 x 8 or 512 x 8).

Question: Is this EEPROM compatible with the SPI protocol?

Answer: No, this device uses the Microwire (or 3-wire) serial protocol, which is similar to but distinct from SPI. It is important to ensure your host controller supports this interface.

Question: What is the maximum clock speed (SK) for reliable operation?

Answer: For full operational details, please consult the official datasheet. Generally, these devices support clock speeds suitable for most microcontroller communications.

Question: Does this memory IC have a software write-protect feature?

Answer: Yes, the 93LC66B features built-in write protection that can be enabled or disabled via specific instruction sequences, safeguarding stored data from accidental corruption.

Question: Why is non-volatile memory important in my design?

Answer: Non-volatile memory retains its data when power is cycled. This is critical for storing boot code, device configuration, user settings, and calibration data that must be preserved.

Question: Can I get a sample of this component from PCX?

Answer: PCX is committed to supporting engineers through all phases of development. Please contact our customer support team to inquire about sample availability and evaluation units.

Order Your 4 Kbit Serial EEPROM from PCX Today!

Ensure your project has the reliable, high-quality memory it needs. Add the Microchip 93LC66B-I/SN to your bill of materials and experience the PCX difference with fast, dependable shipping and expert technical support. Order today to secure your components!

Disclaimer: Product image is for representational purposes only. Please refer to the datasheet for exact specifications.

Datasheet: View 93LC66B-I/SN Datasheet (Hosted on PCXCo.com)