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MCP7940NT-I/SN Breakout
RTC/CALENDAR I2C 32.768KHZ 8SOIC
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Design a Custom BoardAbout This Component
Battery-backed real-time clock/calendar IC with I2C interface tracking hours, minutes, seconds, day of week, date, month, and year through 2399. Features dual programmable alarms, 64-byte SRAM, power-fail time-stamping, and low-power operation at 1.2 µA typical. Operates across 1.8V to 5.5V with on-chip trimming for 32.768 kHz crystal oscillators.
Package: SOIC-8 (3.9×4.9mm) · 8 pins
Why does this need a breakout?
An 8-pin SOIC with 1.27mm pitch is too fine for breadboards and hand-soldering without a microscope. A breakout board routes these pins to standard 0.1" headers, enabling rapid prototyping and reliable connections for op-amps, transceivers, and small power MOSFETs without requiring reflow equipment.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Microchip Technology |
| Part Number | MCP7940NT-I/SN |
| Package | SOIC-8 (3.9×4.9mm) |
| Pin Count | 8 |
| Interface | I2C, 2-Wire Serial |
| Memory Size | 64B |
| Type | Clock/Calendar |
| Voltage - Supply | 1.8V ~ 5.5V |
What's Included
BILL OF MATERIALS
- 1x MCP7940NT-I/SN soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS