25LC040XT-I/ST

Product Overview

Category: Integrated Circuits (ICs)

Use: Non-volatile Memory

Characteristics: - Low-power CMOS technology - 4Kbits of EEPROM memory - SPI interface - 1.8V to 5.5V operating voltage range - Industrial temperature range (-40°C to +85°C) - Lead-free package

Package: 8-pin SOIC (Small Outline Integrated Circuit)

Essence: The 25LC040XT-I/ST is a 4Kbit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) integrated circuit. It provides non-volatile storage for data that needs to be retained even when power is removed.

Packaging/Quantity: The 25LC040XT-I/ST is available in tape and reel packaging, with 2,000 units per reel.

Specifications

• Memory Size: 4Kbits (512 bytes)
• Interface Type: Serial Peripheral Interface (SPI)
• Operating Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years
• Package Type: 8-pin SOIC

Pin Configuration

The 25LC040XT-I/ST has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | CS | Chip Select | | 2 | SCK | Serial Clock | | 3 | SI | Serial Input | | 4 | SO | Serial Output | | 5 | WP | Write Protect | | 6 | VSS | Ground | | 7 | HOLD | Hold Input | | 8 | VCC | Power Supply |

Functional Features

• Non-volatile storage: The 25LC040XT-I/ST retains data even when power is removed.
• Serial interface: It uses the SPI protocol for communication with a microcontroller or other devices.
• Low-power consumption: The IC operates in low-power CMOS technology, making it suitable for battery-powered applications.
• Wide operating voltage range: It can be powered from 1.8V to 5.5V, allowing compatibility with various systems.
• Industrial temperature range: The IC can operate reliably in harsh industrial environments.

Advantages and Disadvantages

Advantages: - Non-volatile memory ensures data retention without power supply. - Small form factor and low-power consumption make it suitable for portable devices. - SPI interface allows easy integration with microcontrollers. - Wide operating voltage range provides flexibility in system design. - Industrial temperature range enables reliable operation in harsh conditions.

Disadvantages: - Limited storage capacity (4Kbits) compared to other memory options. - Slower write and erase times compared to volatile memory. - Requires additional circuitry for proper interfacing with microcontrollers.

Working Principles

The 25LC040XT-I/ST utilizes EEPROM technology to store data. It consists of a grid of memory cells that can be electrically programmed and erased. The serial interface allows data to be written or read one byte at a time. The chip select (CS), serial clock (SCK), and serial input (SI) pins are used to send commands and data to the IC. The serial output (SO) pin transmits data back to the microcontroller. The write protect (WP) pin can be used to protect the memory from accidental writes.

Detailed Application Field Plans

The 25LC040XT-I/ST is commonly used in various applications, including but not limited to: - Embedded systems - Industrial control systems - Automotive electronics - Consumer electronics - Medical devices

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 25LC040XT-I/ST include: - AT25080A-10PU-2.7 (Atmel) - CAT24C04WI-GT3 (ON Semiconductor) - M95040-WMN6TP (STMicroelectronics) - FM24CL64B-GTR (Cypress Semiconductor)

These alternatives may have different specifications, pin configurations, or package types, so it is important to select the one that best suits the specific requirements of the application.

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