Microchip Technology

MCP7940NT-I/ST  

Real Time Clocks ICs

MCP7940NT-I/ST Description

The MCP7940NT-I/ST from Microchip Technology is a highly reliable Real-Time Clock (RTC) and Calendar IC designed for precision timekeeping in automotive and industrial applications. Housed in an 8-pin TSSOP package, this surface-mount device operates across a wide voltage range of 1.8V to 5.5V, with a backup battery supply range of 1.5V to 5.5V, ensuring uninterrupted operation during power outages. It features 64B of SRAM for data storage and supports I2C communication for seamless integration with microcontrollers.

MCP7940NT-I/ST Features

• Ultra-Low Power Consumption: Only 1.2µA timekeeping current at 3.3V, ideal for battery-powered systems.
• Advanced Timekeeping: Supports 12/24-hour format with HH:MM:SS display, leap year correction, and alarm functionality.
• Integrated SRAM: 64-byte non-volatile memory for critical data retention.
• Square Wave Output: Configurable frequency output for system synchronization.
• Automotive-Grade: Compliant with stringent automotive standards, ensuring reliability in harsh environments.
• RoHS3 & REACH Compliant: Environmentally friendly and suitable for global markets.

MCP7940NT-I/ST Applications

• Automotive Systems: Dashboard clocks, event logging, and infotainment systems due to its automotive-grade robustness.
• Industrial Automation: Timestamping for data loggers, PLCs, and sensor networks.
• Consumer Electronics: Smart meters, wearables, and IoT devices benefiting from its low power consumption.
• Backup Power Systems: Uninterrupted timekeeping during mains failure, critical for medical and security equipment.

Conclusion of MCP7940NT-I/ST

The MCP7940NT-I/ST stands out as a versatile, low-power RTC solution with integrated SRAM, alarm functions, and automotive-grade reliability. Its wide voltage range and I2C interface make it adaptable to diverse applications, from energy-efficient IoT devices to mission-critical automotive systems. For engineers seeking a high-precision, feature-rich RTC, this IC delivers exceptional performance and long-term stability.

MCP7940NT-I/ST Documents

Download datasheets and manufacturer documentation for MCP7940NT-I/ST

Errata :

MCP7940N Errata      

PCN Assembly/Origin :

Bond Wire 28/Mar/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