MCHPMCP7940N-I/P
Overview
The MCP7940N-I/P is a low-power Real-Time Clock and Calendar (RTCC) IC that utilizes an I2C interface and includes 64 bytes of SRAM. It features a digital trimming circuit for crystal calibration and a programmable square wave output for system clocking or interrupts. This version comes in a through-hole 8-DIP package, making it ideal for prototyping and breadboarding applications.
Why Choose This Part
The device offers a wide operating voltage range from 1.8V to 5.5V and consumes as little as 1.2 microamps in typical timekeeping operation. It simplifies design by integrating 64 bytes of user-addressable SRAM for storing configuration data or state information during power-down events.
Applications
Key Specifications
Getting Started
To begin development, connect a 32.768 kHz crystal to the X1 and X2 pins and pull-up resistors to the I2C bus lines. Since this is a PDIP-8 package, it can be plugged directly into a standard breadboard or an 8-pin DIP socket for use with Arduino or PIC development platforms.
MCP7940 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Current - Timekeeping (Max) | Stock |
|---|---|---|---|
| MCP7940N-I/P (this part) | DIP-8 | 1.2uA | 1,254 |
| MCP7940MT-I/SN | SOIC-8 | 1uA | 2,696 |
Also Consider
