25LC040AT-M/SN

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Serial EEPROM Memory

Characteristics: - Low-power CMOS technology - 4Kbits of memory organized as 512 x 8 bits - SPI (Serial Peripheral Interface) compatible - Self-timed erase and write cycles - 1,000,000 erase/write cycles guaranteed - Data retention > 200 years - 64-byte page write mode - Hardware write protection - Low power consumption - Small form factor

Package: SOIC (Small Outline Integrated Circuit)

Essence: The 25LC040AT-M/SN is a non-volatile serial EEPROM memory chip that provides reliable data storage in various electronic devices. It offers low power consumption, high endurance, and small form factor, making it suitable for applications where space and power efficiency are crucial.

Packaging/Quantity: The 25LC040AT-M/SN is available in a SOIC package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Memory Size: 4Kbits (512 bytes)
• Organization: 512 x 8 bits
• Interface: SPI (Serial Peripheral Interface)
• Supply Voltage: 2.5V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: > 200 years
• Page Write Mode: 64 bytes
• Write Protection: Hardware-based

Pin Configuration

The 25LC040AT-M/SN has 8 pins arranged as follows:

┌───┬───┐ │ 1 │ 8 │ └───┴───┘

1. Chip Select (CS): Active low input used to enable/disable the device.
2. Serial Clock (SCK): Input for synchronizing data transfer.
3. Serial Data Input (SI): Input for shifting data into the device.
4. Serial Data Output (SO): Output for shifting data out of the device.
5. Write Protect (WP): Input for hardware write protection.
6. VSS: Ground (0V) connection.
7. Serial Data Out (NC): No connection.
8. VCC: Supply voltage connection.

Functional Features

• Non-volatile memory: The 25LC040AT-M/SN retains data even when power is removed.
• SPI compatibility: It supports the widely-used Serial Peripheral Interface for easy integration with microcontrollers and other devices.
• Self-timed erase and write cycles: Simplifies programming operations by eliminating the need for external timing control.
• High endurance: The chip guarantees 1,000,000 erase/write cycles, ensuring long-term reliability.
• Low power consumption: Ideal for battery-powered applications due to its low power requirements.
• Hardware write protection: Provides an additional layer of security by allowing write protection through a dedicated pin.

Advantages and Disadvantages

Advantages: - Small form factor enables space-efficient designs. - High endurance ensures reliable data storage. - Low power consumption prolongs battery life. - SPI compatibility allows for easy integration. - Hardware write protection enhances data security.

Disadvantages: - Limited memory capacity (4Kbits). - Slower write speed compared to some other EEPROM technologies. - Requires external microcontroller or host device for operation.

Working Principles

The 25LC040AT-M/SN utilizes non-volatile memory technology to store data. It communicates with a microcontroller or host device using the SPI interface. When data needs to be written, the chip receives the instructions and data from the microcontroller, performs the necessary erase and write cycles, and stores the data in its memory cells. During read operations, the chip retrieves the requested data and sends it back to the microcontroller.

Detailed Application Field Plans

The 25LC040AT-M/SN can be used in various applications, including but not limited to: - Consumer electronics: Smartphones, tablets, digital cameras, portable media players. - Automotive: Engine control units, infotainment systems, instrument clusters. - Industrial automation: Programmable logic controllers (PLCs), sensors, motor drives. - Medical devices: Patient monitoring systems, diagnostic equipment, infusion pumps. - Home appliances: Washing machines, refrigerators, air conditioners.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 25LC040AT-M/SN include: - 25AA040: 4Kbit SPI Serial EEPROM - 24LC04B: 4Kbit I2C Serial EEPROM - AT93C46: 1Kbit Microwire Serial EEPROM - CAT24C04: 4Kbit CMOS