25AA040AT-I/ST

Product Overview

Category

The 25AA040AT-I/ST belongs to the category of serial EEPROM (Electrically Erasable Programmable Read-Only Memory) chips.

Use

This product is commonly used for storing small amounts of data in various electronic devices, such as consumer electronics, industrial equipment, and automotive applications.

Characteristics

• Low power consumption
• High reliability
• Small form factor
• Non-volatile memory
• SPI (Serial Peripheral Interface) communication interface

Package

The 25AA040AT-I/ST is typically available in a small surface-mount package, making it suitable for compact designs and PCB integration.

Packaging/Quantity

The product is usually supplied in tape and reel packaging, with quantities varying based on manufacturer specifications.

Specifications

• Memory Size: 4 Kbits
• Interface: SPI
• Operating Voltage: 1.8V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years

Detailed Pin Configuration

The 25AA040AT-I/ST typically features an 8-pin SOIC (Small Outline Integrated Circuit) or DFN (Dual Flat No-leads) package. The pin configuration includes: 1. Chip Select (/CS) 2. Serial Clock (SCK) 3. Serial Data Input/Output (SI/SO) 4. Ground (GND) 5. Write Protect (/WP) 6. VCC (Power Supply) 7. Hold (/HOLD) 8. Not Connected (NC)

Functional Features

• Byte and Page Write Modes
• Sequential Read Operation
• Self-Timed Write Cycle
• Software Write Protection
• Hardware Write Protection
• Unparalleled Reliability

Advantages and Disadvantages

Advantages

• Compact form factor
• Low power consumption
• High-speed SPI interface
• Robust data retention
• Wide operating voltage range

Disadvantages

• Limited storage capacity compared to larger EEPROMs
• Higher cost per bit compared to larger memory devices

Working Principles

The 25AA040AT-I/ST operates by utilizing the SPI protocol to communicate with the host microcontroller. It stores and retrieves data through a series of read and write operations, providing non-volatile memory storage for critical system parameters and user data.

Detailed Application Field Plans

The 25AA040AT-I/ST finds application in various fields, including: - Consumer Electronics: Smartphones, digital cameras, and portable media players - Industrial Equipment: Automation systems, sensor modules, and control units - Automotive: Engine control units, infotainment systems, and body control modules

Detailed and Complete Alternative Models

Some alternative models to the 25AA040AT-I/ST include: - 25LC040A from Microchip Technology - AT2504B from Adesto Technologies - CAT24C04 from ON Semiconductor

In conclusion, the 25AA040AT-I/ST serial EEPROM offers a reliable and efficient solution for data storage in a wide range of electronic applications, despite its limited capacity. Its compact size, low power consumption, and robust performance make it a popular choice for designers seeking non-volatile memory solutions.

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