MCP120T-300I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP120T-300I/TT is a single-channel voltage supervisor that asserts an active-low reset output when supply voltage falls below the fixed 2.925 V threshold, protecting 3.3 V microcontrollers from brownout lockup. Packaged in a 3-pin SOT-23 with industrial -40°C to +85°C rating, it requires no external passive components. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP120T-300I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2600(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
- Fixed 2.925 V brownout threshold optimized for 3.3 V logic systems, providing accurate supervision without external resistors
- Active-low open-drain reset output compatible with virtually all 3.3 V microcontroller RESET pins with a simple pull-up
- Single-channel, no-watchdog design in ultra-compact 3-pin SOT-23 minimizes BOM count and PCB area in space-critical applications
Applications
The MCP120T-300I/TT is designed to supervise the 3.3 V power rails in microcontroller-based embedded systems, wireless IoT modules, and portable consumer electronics. It generates a clean active-low reset when the supply drops below 2.925 V, preventing undefined behavior during power-up sequencing or battery depletion events. Its tiny footprint and low quiescent current also make it well-suited for coin-cell-powered sensor nodes and wearable devices.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Additional Feature | MNL RST:N;PW FL IO:N;PRG RST DLY:N;WD:N;WDO:N;WWD:N |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.06mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.93V |
| Package | SOT23 (3-Pin) |
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 | Mainland China, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What reset threshold does the MCP120T-300I/TT use, and is it adjustable for different supply rails?
The MCP120T-300I/TT has a fixed reset threshold of 2.925 V and is not adjustable. It is specifically intended for monitoring 3.3 V rails in microcontroller and DSP systems. No external resistors are needed, which simplifies design and eliminates threshold variation caused by resistor tolerances over the -40°C to +85°C industrial operating temperature range.
How should the active-low reset output of the MCP120T-300I/TT be connected to a 3.3 V ARM Cortex-M microcontroller?
Connect a 10 kΩ pull-up resistor from the open-drain reset output to the 3.3 V supply, then route the signal to the MCU's active-low nRESET pin. The MCP120T-300I/TT will hold the reset line low as long as supply voltage remains below 2.925 V and release it once the rail has recovered, giving the MCU at least 100 ms to stabilize before execution begins.
How does the MCP120T-300I/TT differ from the MCP120T-450I/TT, and which should be chosen for a 3.3 V versus a 5 V system?
The MCP120T-300I/TT trips at 2.925 V and is the correct choice for 3.3 V logic rails, while the MCP120T-450I/TT trips at 4.375 V and is intended for 5 V systems. Both share the same 3-pin SOT-23 footprint and active-low open-drain output, so the selection reduces to matching the threshold to the nominal operating voltage with at least a 10% margin above the trip point.
What quiescent current does the MCP120T-300I/TT draw, and is it suitable for a coin-cell-powered sensor node?
The MCP120T-300I/TT typically draws less than 50 µA of quiescent current during normal supervision. For a CR2032 coin cell with approximately 220 mAh capacity, this represents a theoretical shelf life well above 5 years from supervision alone, making it a practical choice for low-power IoT sensors, asset trackers, and wireless nodes that must run unattended for extended periods.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5030 | $0.50 |
| 25+ | $0.5000 | $12.50 |
| 100+ | $0.4600 | $46.00 |
| 1000+ | $0.3700 | $370.00 |
| 3000+ | $0.2700 | $810.00 |
| 6000+ | $0.2600 | $1560.00 |
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