Microchip Technology

MCP7940NT-E/SN  

Real Time Clocks ICs

MCP7940NT-E/SN Description

The MCP7940NT-E/SN is a highly reliable and versatile Real-Time Clock (RTC) integrated circuit (IC) offered by Microchip Technology. This surface-mount device operates within a wide voltage range of 1.8V to 5.5V for the supply and 1.3V to 5.5V for the battery, making it suitable for various applications. It is compliant with the RoHS3 standard, indicating its environmental friendliness, and classified under the EAR99 ECCN, facilitating international trade. The product is designed for automotive applications, ensuring it meets stringent quality and performance requirements.

MCP7940NT-E/SN Features

• Voltage Supply Range: 1.8V to 5.5V for the supply and 1.3V to 5.5V for the battery, providing flexibility in power source selection.
• Time Format: Supports both 12-hour and 24-hour formats, making it adaptable to different user preferences and regional standards.
• Alarm, Leap Year, and Square Wave Output: Includes an alarm feature for time-based events, leap year compensation for accurate calendar keeping, and a square wave output for synchronization with other system components.
• SRAM and 64B Memory Size: Incorporates 64 bytes of static random-access memory (SRAM) for storing time and date information, ensuring data retention even during power loss.
• Low Power Consumption: Consumes a maximum of 1.2µA at 3.3V during timekeeping, making it energy-efficient for battery-powered devices.
• REACH Unaffected: Compliant with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation, indicating its safety for use in consumer products.
• Moisture Sensitivity Level (MSL) 1: Indicates that the device can be stored and handled without special precautions regarding moisture, simplifying logistics and manufacturing processes.

MCP7940NT-E/SN Applications

The MCP7940NT-E/SN is ideal for applications requiring precise timekeeping and calendar functions in various environments:

• Automotive Systems: For in-vehicle infotainment systems, telematics, and engine control units that require accurate time and date tracking.
• Industrial Automation: In systems that need to schedule tasks, monitor equipment, or log events with timestamps.
• Smart Home Devices: For devices that require time-based automation, such as thermostats, lighting systems, and security systems.
• Portable Electronics: In devices like wearables, where low power consumption is critical, and accurate timekeeping is necessary.

Conclusion of MCP7940NT-E/SN

The MCP7940NT-E/SN is a robust and feature-rich RTC IC that stands out due to its wide voltage range, low power consumption, and automotive-grade performance. Its unique combination of alarm, leap year compensation, and square wave output capabilities makes it a superior choice for applications demanding precise time management and synchronization. With its compliance to various international standards and its adaptability to different time formats, the MCP7940NT-E/SN is a reliable solution for a broad spectrum of electronic devices in the automotive, industrial, and consumer electronics sectors.

MCP7940NT-E/SN Documents

Download datasheets and manufacturer documentation for MCP7940NT-E/SN

Errata :

MCP7940N Errata      

PCN Assembly/Origin :

Manufacturing Change 07/Apr/2022      

Datasheets :

MCP7940N       I²C™ & SPI Family Brochure      

PCN Packaging :

Packing Changes 10/Oct/2016       Label and Packing Changes 23/Sep/2015      

Design Resources :

MCP7940N Development Tool Selector      

HTML Datasheet :

I²C™ & SPI Family Brochure      

PCN Design/Specification :

MCP7940N 08/Apr/2022       MCP7940N 31/Oct/2019      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH