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
Key Features
- 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
Applications
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.
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 | 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 |
Alternate & Equivalent Parts
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.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0400 | $1.04 |
| 100+ | $0.9100 | $91.00 |
| 1000+ | $0.8500 | $850.00 |
| 5000+ | $0.8300 | $4150.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”