M41T81SMY6E - English Editing Encyclopedia Entry

Product Overview

Category

M41T81SMY6E belongs to the category of Real-Time Clocks (RTCs).

Use

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

Characteristics

• Package: M41T81SMY6E comes in a small surface-mount package.
• Essence: It provides accurate timekeeping and calendar functionality.
• Packaging/Quantity: The product is typically packaged in reels or tubes, with varying quantities depending on the supplier.

Specifications

The specifications of M41T81SMY6E include:

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 ppm at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Interface: Supports standard mode (100 kHz) and fast mode (400 kHz)
• Battery Backup: Integrated trickle charger for backup power supply

Detailed Pin Configuration

The pin configuration of M41T81SMY6E is as follows:

1. VBAT - Battery Input
2. GND - Ground
3. SDA - Serial Data Line
4. SCL - Serial Clock Line
5. SQW/INT - Square Wave Output / Interrupt Output
6. VCC - Power Supply Input

Functional Features

The functional features of M41T81SMY6E include:

• Real-Time Clock: Provides accurate timekeeping with seconds, minutes, hours, day, date, month, and year information.
• Alarm Function: Allows setting alarms for specific times or dates.
• Trickle Charger: Enables backup power supply using an external battery.
• Square Wave Output: Generates square wave signals with selectable frequencies.
• Interrupt Output: Provides interrupt signals based on user-defined conditions.

Advantages and Disadvantages

Advantages of M41T81SMY6E: - High timekeeping accuracy - Wide operating temperature range - Low power consumption - Small package size

Disadvantages of M41T81SMY6E: - Limited memory for additional data storage - Lack of advanced features compared to some higher-end RTCs

Working Principles

M41T81SMY6E utilizes an internal oscillator and a counter to keep track of time. It communicates with the host microcontroller through the I2C bus interface. The integrated trickle charger ensures continuous operation by charging an external backup battery when the main power supply is disconnected.

Detailed Application Field Plans

M41T81SMY6E finds applications in various electronic devices, including but not limited to:

1. Consumer Electronics: Used in digital cameras, portable media players, and gaming consoles for accurate time display and scheduling functions.
2. Industrial Automation: Integrated into industrial control systems, PLCs, and data loggers to maintain precise time synchronization.
3. Automotive: Employed in car infotainment systems, dashboard displays, and navigation units for accurate timekeeping and event scheduling.
4. Medical Devices: Utilized in medical equipment such as patient monitors and infusion pumps to ensure accurate timestamping of events.

Detailed and Complete Alternative Models

Some alternative models to M41T81SMY6E that offer similar functionality include:

1. DS3231 - Real-Time Clock Module with I2C Interface
2. PCF8563 - Low-Power Real-Time Clock with Alarm Function
3. MCP7940N - I2C Real-Time Clock/Calendar with SRAM

These alternatives provide comparable features and can be considered based on specific application requirements.

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