MCP7940MT-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP7940MT-I/SN is a real-time clock and calendar IC with I2C interface operating at up to 400 kHz, featuring 64 bytes of SRAM and an interrupt output in an 8-pin SOIC package. It maintains accurate timekeeping with a 32.768 kHz crystal and is well-suited for low-power embedded systems requiring battery-backed time and date tracking.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP7940MT-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5400(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- I2C serial interface at up to 400 kHz enables fast and simple integration with microcontrollers in 2-wire bus topologies
- 64 bytes of on-chip SRAM provides non-volatile storage for configuration data or small log entries alongside timekeeping
- Configurable interrupt output supports alarm and periodic event generation for low-power wake-up applications
- Compact 8-pin SOIC package minimizes PCB footprint in space-constrained IoT and consumer electronics designs
Applications
The MCP7940MT-I/SN is ideal for embedded systems requiring accurate real-time clock and calendar functions such as data loggers, IoT nodes, industrial controllers, and consumer electronics with scheduling features. Its I2C interface at 400 kHz simplifies microcontroller integration on a shared 2-wire bus alongside sensors and EEPROMs. The 64-byte SRAM and alarm interrupt output make it a versatile companion for low-power systems that need periodic wake-up and local data buffering.
Specifications
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 13 |
| Clock Frequency-Max | 0.032MHz |
| Information Access Method | SERIAL(I2C) |
| Interrupt Capability | Y |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| On Chip Data RAM Width | 8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.23 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (words) | 64 |
| Screening Level | TS 16949 |
| Supply Current-Max | 0.4mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.8V |
| Supply Voltage-Nom | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time-Min | SECONDS |
| Volatile | YES |
| uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
| ## MCP7940MT-I/SN Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP7940MT-I/SN:
Frequently Asked Questions
What communication interface does the MCP7940MT-I/SN use and at what maximum speed?
The MCP7940MT-I/SN uses an I2C serial interface with a maximum clock frequency of 400 kHz, allowing it to share a 2-wire bus with other I2C devices such as sensors, EEPROMs, and display controllers on the same PCB.
How much on-chip SRAM does the MCP7940MT-I/SN provide for data storage?
The MCP7940MT-I/SN integrates 64 bytes of on-chip SRAM, which can be used to store configuration settings, calibration coefficients, or small log entries in addition to the real-time clock and calendar registers.
Does the MCP7940MT-I/SN support alarm interrupts for low-power microcontroller wake-up?
Yes, the MCP7940MT-I/SN includes an interrupt output that can be configured to generate alarm signals at programmable intervals, enabling the host microcontroller to enter deep sleep and wake up only at scheduled times, saving significant power in battery-operated 3.3 V systems.
Which package does the MCP7940MT-I/SN use and is it suitable for automated assembly?
The MCP7940MT-I/SN comes in an 8-pin SOIC package with a 1.27 mm pin pitch, a standard SMD footprint that is fully compatible with automated pick-and-place and reflow soldering processes used in high-volume PCB manufacturing.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6650 | $0.67 |
| 100+ | $0.5900 | $59.00 |
| 1000+ | $0.5600 | $560.00 |
| 5000+ | $0.5400 | $2700.00 |
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