25C040XT/ST

Product Overview

Category: Non-volatile Memory
Use: Data storage and retrieval
Characteristics: High-speed, low-power, reliable
Package: SOP-8 (Small Outline Package)
Essence: Serial EEPROM (Electrically Erasable Programmable Read-Only Memory)
Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Memory Size: 4 Kilobits (512 bytes)
• Interface: Serial I2C (Inter-Integrated Circuit)
• Operating Voltage: 1.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 Million cycles
• Data Retention: 100 Years
• Clock Frequency: Up to 1 MHz

Detailed Pin Configuration

The 25C040XT/ST follows the standard SOP-8 pin configuration:

1. VSS (Ground)
2. SDA (Serial Data)
3. SCL (Serial Clock)
4. WP (Write Protect)
5. VCC (Power Supply)
6. NC (No Connection)
7. NC (No Connection)
8. VSS (Ground)

Functional Features

• Byte-wise Read and Write Operations
• Software Write Protection
• Sequential Read Functionality
• Self-timed Write Cycle
• Hardware Write Protection using WP pin
• Schmitt Trigger Inputs for Noise Suppression
• Low Power Consumption in Standby Mode

Advantages and Disadvantages

Advantages: - Compact SOP-8 package for space-constrained applications - High-speed data transfer with up to 1 MHz clock frequency - Wide operating voltage range allows compatibility with various systems - Long data retention period of 100 years ensures data integrity - Low power consumption extends battery life in portable devices

Disadvantages: - Limited memory size of 4 Kilobits may not be sufficient for certain applications - Lack of additional features like hardware encryption or error correction codes

Working Principles

The 25C040XT/ST is a serial EEPROM that stores data using electrically isolated floating-gate transistors. It utilizes the I2C interface for communication with the host microcontroller. The device operates by sending commands and data through the SDA and SCL lines, enabling read and write operations on individual bytes.

During a write operation, the data to be stored is sent to the device along with the memory address. The device internally manages the erase and program cycles required to store the data in the non-volatile memory cells. The self-timed write cycle ensures data integrity and reliability.

Detailed Application Field Plans

The 25C040XT/ST finds application in various fields, including but not limited to:

1. Consumer Electronics: Used for storing configuration settings, user preferences, and firmware updates in devices such as TVs, set-top boxes, and audio systems.
2. Automotive: Employed for storing critical data like mileage, vehicle identification numbers (VIN), and calibration parameters in automotive electronic control units (ECUs).
3. Industrial Automation: Utilized for storing calibration data, sensor configurations, and system parameters in programmable logic controllers (PLCs) and industrial control systems.
4. Medical Devices: Used for storing patient information, device settings, and event logs in medical equipment like infusion pumps, patient monitors, and diagnostic devices.

Detailed and Complete Alternative Models

1. AT24C04 - Manufactured by Atmel Corporation, this 4 Kilobit serial EEPROM offers similar specifications and functionality to the 25C040XT/ST.
2. CAT24C04 - Produced by ON Semiconductor, this 4 Kilobit serial EEPROM is compatible with the I2C interface and provides comparable performance to the 25C040XT/ST.
3. M24C04 - Manufactured by STMicroelectronics, this 4 Kilobit serial EEPROM offers a wide operating voltage range and low power consumption, similar to the 25C040XT/ST.

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