M41T256YMH7E - English Editing Encyclopedia Entry

Product Overview

Category

The M41T256YMH7E belongs to the category of real-time clock (RTC) integrated circuits.

Use

This product is primarily used for timekeeping and calendar functions in various electronic devices.

Characteristics

• High accuracy timekeeping
• Low power consumption
• Small form factor
• Integrated battery backup

Package

The M41T256YMH7E is available in a compact surface-mount package, making it suitable for space-constrained applications.

Essence

The essence of this product lies in its ability to provide accurate timekeeping functionality with minimal power consumption.

Packaging/Quantity

The M41T256YMH7E is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Supply voltage: 1.8V to 5.5V
• Timekeeping accuracy: ±2ppm at 25°C
• Operating temperature range: -40°C to +85°C
• Clock/calendar with leap year compensation
• Battery backup input for continuous timekeeping during power loss
• I2C interface for communication with the host microcontroller

Detailed Pin Configuration

The M41T256YMH7E features a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VCC - Power supply input
2. GND - Ground connection
3. SDA - Serial data line for I2C communication
4. SCL - Serial clock line for I2C communication
5. SQW/OUT - Square wave output or interrupt output
6. VBAT - Battery backup input 7-14. NC - No connection
7. X1 - Crystal oscillator input
8. X2 - Crystal oscillator output

Functional Features

• Accurate timekeeping: The M41T256YMH7E utilizes an internal oscillator and compensation circuitry to ensure precise timekeeping.
• Battery backup: The integrated battery backup input allows the device to maintain accurate timekeeping even during power loss.
• I2C interface: The I2C communication protocol enables seamless integration with a host microcontroller for easy configuration and data retrieval.
• Square wave output: The SQW/OUT pin can be configured to generate a square wave signal, useful for various timing applications.

Advantages and Disadvantages

Advantages

• High accuracy timekeeping ensures reliable performance.
• Low power consumption extends battery life in portable devices.
• Compact package size allows for flexible integration in space-constrained designs.
• Battery backup ensures uninterrupted timekeeping during power outages.

Disadvantages

• Limited memory capacity for storing additional data.
• Reliance on an external crystal oscillator for clock accuracy.

Working Principles

The M41T256YMH7E operates by utilizing an internal oscillator that generates clock pulses. These pulses are used to keep track of time and date information. The device also incorporates compensation circuitry to account for temperature variations, ensuring accurate timekeeping.

During normal operation, the M41T256YMH7E is powered by the main supply voltage. In the event of a power loss, the integrated battery backup input takes over, providing continuous power to the device and preserving timekeeping functionality.

Detailed Application Field Plans

The M41T256YMH7E finds application in various electronic devices that require accurate timekeeping and calendar functions. Some potential application fields include:

1. Consumer electronics: Smartphones, tablets, and digital cameras often rely on real-time clocks for accurate time display and scheduling features.
2. Industrial automation: Programmable logic controllers (PLCs) and industrial control systems utilize RTCs for time synchronization and event logging.
3. Automotive: Vehicle dashboard displays and infotainment systems utilize RTCs for accurate timekeeping and scheduling of maintenance tasks.
4. Medical devices: Equipment such as patient monitors and infusion pumps require precise timekeeping for data logging and synchronization.

Detailed and Complete Alternative Models

1. DS3231 - Real-time clock module with integrated temperature compensation and alarm functionality.
2. PCF8563 - Low-power real-time clock module with I2C interface and battery backup support.
3. DS1307 - Basic real-time clock module with simple I2C interface and battery backup capability.

These alternative models offer similar functionality to the M41T256YMH7E and can be considered based on specific application requirements.

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