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Description
MICROCHIP MCP7940M-I/P RTC, I2C, 64BYTES SRAM, 8PDIPThe MCP7940M I P is an IC Real time Clock Calendar (RTCC) tracks time using internal counters for hours, minutes, seconds, days, months, years and day of week. Alarms can be configured on all counters up to and including months. For usage and configuration, the MCP7940M supports IC communications up to 400kHz. The open drain, multi functional output can be configured to assert on an alarm match, to output a selectable frequency square wave or as a
The MCP7940M-I/P is an I²C� Real-time Clock/Calendar (RTCC) tracks time using internal counters for hours, minutes, seconds, days, months, years and day of week. Alarms can be configured on all counters up to and including months. For usage and configuration, the MCP7940M supports I²C communications up to 400kHz. The open-drain, multi-functional output can be configured to assert on an alarm match, to output a selectable frequency square wave or as a general purpose output. The MCP7940M is designed to operate using a 32.768kHz tuning fork crystal with external crystal load capacitors. On-chip digital trimming can be used to adjust for frequency variance caused by crystal tolerance and temperature.
- On-chip digital trimming/calibration - ±1PPM resolution, ±129PPM range
- Dual programmable alarms
- Versatile output pin - Clock output with selectable frequency
- 1.2µA at 3.3V Operating from VCC, low typical timekeeping current
- 64-byte SRAM User memory
- 2-wire serial interface, I²C� compatible
Applications
Industrial, Clock & Timing, Industrial, Automotive
Warnings
ESD sensitive device, take proper precaution while handling the device.
Product details
| Operating Temperature Min | -40°C |
| Clock IC Type | RTC |
| Operating Temperature Max | 85°C |
| No. of Pins | 8Pins |
| Product Range | - |
| Automotive Qualification Standard | AEC-Q100 |
| Supply Voltage Min | 1.8V |
| Clock IC Case Style | DIP |
| IC Interface Type | I2C |
| Clock Format | HH:MM:SS |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| Date Format | DD:MM:YYYY |
| MSL | - |
Other details
| Brand | MICROCHIP |
| Part Number | MCP7940M-I/P |
| Quantity | Each |
| Technical Data Sheet EN | |
| Product Change Notice EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
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4.5 ★★★★★
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Product Reviews
★★★★★ 3
No bow tie
Color: Burgundy, Size: XX-Large
Perfect fit for my son he's 6'2" about 220lbs. He ordered 2XL . I would've gave it 5 stars but he did not receive the bow tie, and his prom is tomorrow! Now I gotta go out snd spend more money buying the bow tie separately.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Sharp suit
Color: Black, Size: X-Small, Color: Black, Size: X-Small
The quality of the suit is very nice. The material feels thick and does not feel cheap at all. My son and I were both very pleased with this three piece suit altogether. We went off of size recommendation and due to personal preference we both agreed if we weren’t already in time crunch we would’ve sized up one size. Still managed to make it work and looked very sharp.
He is 5’10” 150lbs - size ordered extra small
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Great shirt
Size: Large, Color: Grey
Great shirt with a good price ..nice fit & nice material . Looks great when ironed !!
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Wonderful product
Size: Large, Color: Sky Blue
Great Shirts this is the second set I have bought and they wear nicely and fit well
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Reviewed in the United States on April 15, 2026
★★★★★ 4
Order 1 size larger.
Size: X-Large, Color: Blue White Plaid
Nice shirt. The size is not accurate by any stretch of the imagination. I wear size xl in shirts except for this one. An xl fits like a large. Other than that I like the shirt. I would've given it 5 stars if not for the sizing. I'll give away this one and order an xxl. Just order a size above what you wear and you'll be happy.
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Reviewed in the United States on February 15, 2026