MCP79402T-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP79402T-I/SN is a real-time clock (RTC) with I2C interface, featuring 64 bytes of SRAM and an EUI-64 node address. It operates at up to 32.768 kHz clock frequency and supports interrupt capability, battery backup, and serial I2C access for time-keeping in low-power embedded systems.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP79402T-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8300(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP79402T-I/SN?
- I2C serial interface supporting up to 400 kHz Fast mode communication
- 64 bytes of battery-backed general-purpose SRAM for user data storage
- Integrated EUI-64 node address for unique device identification
- Battery backup input with automatic switchover for uninterrupted timekeeping
- Interrupt output pin for alarm and timer events
- Clock frequency up to 32.768 kHz with crystal oscillator support
What is MCP79402T-I/SN used for?
The MCP79402T-I/SN is widely used in industrial data loggers, consumer electronics, and embedded systems requiring precise timekeeping with minimal power consumption. It is well-suited for applications such as smart meters, alarm clocks, and IoT devices where battery-backed time-stamping and unique device identification via EUI-64 are essential.
What are the specifications of MCP79402T-I/SN?
| 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 | 3mA |
| 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 | NO |
| uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
| 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 |
Where can I find the MCP79402T-I/SN datasheet?
MCP79402T-I/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP79402T-I/SN?
Compatible alternatives and drop-in replacements for MCP79402T-I/SN:
Frequently Asked Questions
How does the MCP79402T-I/SN maintain accurate timekeeping during power loss?
The MCP79402T-I/SN includes a dedicated battery backup input (VBAT) that automatically switches to backup power when the main supply is lost, ensuring uninterrupted RTC operation. The SOIC-8 package integrates battery switchover circuitry and preserves 64 bytes of SRAM data even during power outages.
What I2C clock speed does MCP79402T-I/SN support, and how does it affect bus design?
The MCP79402T-I/SN supports I2C communication at up to 400 kHz in Fast mode, compatible with most microcontroller I2C peripherals. This allows integration on a 3.3 V or 5 V I2C bus alongside sensors and EEPROMs without additional level-shifters in many standard designs.
For a design requiring unique node addressing, how does MCP79402T-I/SN support device identification?
The MCP79402T-I/SN includes a factory-programmed EUI-64 node address, providing a globally unique 64-bit identifier that simplifies node management in networked systems. This eliminates the need for external EEPROM or software-managed addressing in IoT and industrial applications.
What procurement considerations apply when sourcing MCP79402T-I/SN for volume production?
The MCP79402T-I/SN carries a factory lead time of approximately 6 weeks in standard production. It is RoHS compliant (JESD-609 code e3) and available in tape-and-reel format (T suffix) for automated SMT assembly, making it suitable for medium to high-volume PCB manufacturing runs.
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