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MCP7940NT-I/MNY

Name: MCP7940NT-I/MNY
Rating: 4.7 (12 reviews)

IC RTC CLK/CALENDAR I2C 8TDFN

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Part Status	Active
Base Product Number	MCP7940
DigiKey Programmable	Not Verified
Type	Clock/Calendar
Features	Alarm, Leap Year, Square Wave Output, SRAM
Memory Size	64B
Time Format	HH:MM:SS (12/24 hr)
Date Format	YY-MM-DD-dd
Interface	I2C, 2-Wire Serial
Voltage - Supply	1.8V ~ 5.5V
Voltage - Supply, Battery	1.3V ~ 5.5V
Current - Timekeeping (Max)	1.2µA @ 3.3V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package	8-WFDFN Exposed Pad
Supplier Device Package	8-TDFN (2x3)
Packaging	Cut Tape (CT), Tape & Reel (TR)
Grade	Automotive
Qualification	AEC-Q100

概述

Description

The MCP7940NT-I/MNY is a low-power real-time clock (RTC) with an integrated EEPROM, developed by Microchip Technology. It operates over a wide voltage range (1.8V to 5.5V) and communicates via I2C interface, making it suitable for various embedded applications. Key features include:
- Real-Time Clock: Accurate timekeeping with a built-in oscillator.
- EEPROM: 64 bytes of non-volatile memory for data storage.
- Battery Backup: Maintains timekeeping during power outages using a coin cell battery.
- Programmable Alarms: Can generate interrupts for time-based events.
- Low Power Consumption: Designed for battery-operated devices, enhancing energy efficiency.
The MCP7940NT-I/MNY is ideal for applications such as consumer electronics, industrial automation, and any device requiring precise timekeeping in a compact form factor. Its ability to retain time and data during power loss makes it a reliable choice for time-sensitive applications.

Features

The MCP7940NT-I/MNY is a real-time clock (RTC) with an integrated EEPROM, designed for battery-backed applications. Key features include:
1. I2C Interface: Supports standard I2C communication, enabling easy integration with microcontrollers.
2. Real-Time Clock: Maintains accurate timekeeping with a programmable alarm function.
3. EEPROM Memory: Contains 64 bytes of non-volatile EEPROM for data storage.
4. Low Power Consumption: Operates with minimal energy, ideal for battery-powered devices.
5. Temperature Compensation: Offers improved accuracy across varying temperatures.
6. Battery Backup: Maintains timekeeping during power outages using an external battery.
7. Oscillator: Built-in crystal oscillator for precise timekeeping.
8. Integrated Timer: Provides an adjustable timer for various applications.
9. User-Friendly Registers: Simplifies access and configuration via dedicated registers.
These features make the MCP7940NT-I/MNY suitable for applications in embedded systems, time tracking, and low-power devices.

Package

The MCP7940NT-I/MNY is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) package. This type of package is surface-mounted, allowing for a compact design and efficient space utilization on PCBs.

Pinout

The MCP7940NT-I/MNY is a real-time clock (RTC) with a total of 8 pins. Here are the pin functions:
1. Vbat: Battery backup input, maintains timekeeping during power loss.
2. Vss: Ground connection.
3. SCL: Serial clock line for I²C communication.
4. SDA: Serial data line for I²C communication.
5. SQW/INT: Square wave output or interrupt output.
6. 32K: 32 kHz output for clock applications.
7. TE: Timer Enable; used to enable the timer functionality.
8. RST: Reset input for initializing the device.
This device operates with a supply voltage range of 1.8V to 5.5V and includes features such as a programmable square wave output, alarm functions, and a temperature-compensated oscillator for accurate timekeeping.

Manufacturer

The MCP7940NT-I/MNY is manufactured by Microchip Technology Inc., a leading provider of microcontroller and analog semiconductor solutions. Founded in 1989, Microchip specializes in embedded control applications, offering a wide range of products including microcontrollers, memory devices, and analog components. The company serves various industries such as automotive, consumer electronics, and industrial automation, focusing on providing innovative solutions that enhance performance and efficiency in electronic designs. Microchip is known for its commitment to quality, customer support, and a comprehensive development ecosystem, including software tools and hardware platforms to facilitate product development.

Application

The MCP7940NT-I/MNY is a real-time clock (RTC) with battery backup and EEPROM, commonly used in applications such as embedded systems, IoT devices, consumer electronics, industrial automation, and time-sensitive data logging. It provides accurate timekeeping, date tracking, and non-volatile memory for configuration settings, making it suitable for projects requiring time management and low power consumption.

Equivalent

The MCP7940NT-I/MNY is a Real-Time Clock (RTC) with EEPROM and battery backup. Equivalent products include:
1. MCP795W22E (similar features with additional functionality)
2. DS1307 (basic RTC features)
3. M41T62 (includes battery backup)
4. PCF8523 (I2C RTC with low power consumption)
When selecting an equivalent, consider specific features like I2C/SPI interface, EEPROM size, and power requirements.