MCP120T-450I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP120T-450I/TT is a single-channel voltage supervisor IC that monitors supply rails and asserts an active-low reset output when the voltage drops below the 4.375 V threshold. Packaged in a tiny 3-pin SOT-23, it suits space-constrained microcontroller reset circuits. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP120T-450I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2641(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 4.375 V threshold with active-low open-drain reset output, ensuring reliable microcontroller reset without external components
- Ultra-compact 3-pin SOT-23 package enabling minimal PCB footprint for portable and handheld designs
- Single-channel architecture with no external adjustable threshold components required, reducing BOM cost and assembly complexity
Applications
The MCP120T-450I/TT is designed for reset supervision of microcontrollers, FPGAs, and DSPs operating from 5 V rails in embedded systems, industrial controllers, and consumer electronics. It asserting a clean active-low reset signal when supply voltage falls below 4.375 V prevents system lockup during power-up, power-down, and brownout events. Its tiny SOT-23 footprint makes it ideal for handheld instruments and IoT edge nodes with strict board-space budgets.
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 | +4.38V |
| ## MCP120T-450I/TT Alternates Showing results | Image |
| 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 | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP120T-450I/TT:
suggested
suggested
Frequently Asked Questions
At what supply voltage does the MCP120T-450I/TT assert its reset signal, and what logic level does the reset output use?
The MCP120T-450I/TT asserts its active-low reset output when the monitored supply voltage drops below 4.375 V. The reset pin is an open-drain output, so a pull-up resistor to the logic supply is needed. The device maintains supervision accuracy across the full -40°C to +85°C industrial temperature range.
How many supply rails can a single MCP120T-450I/TT monitor, and what is its typical quiescent current consumption?
The MCP120T-450I/TT monitors 1 supply rail with a single fixed threshold of 4.375 V. Its quiescent current is typically below 50 µA, making it efficient for battery-powered designs where every microamp of standby draw matters in systems running for months on a coin cell.
In what application scenarios is the MCP120T-450I/TT preferable to a discrete resistor-divider reset circuit?
Discrete divider networks require at least 3 components and are sensitive to resistor tolerance drift over temperature. The MCP120T-450I/TT replaces them with a single 3-pin SOT-23 part that guarantees a precise 4.375 V trip point across -40°C to +85°C, saving at least 2 PCB components and eliminating the tolerance stack-up risk in high-volume production.
Is the MCP120T-450I/TT compatible with 5 V microcontroller reset pins, and how should the reset line be terminated?
Yes, the device is designed specifically for 5 V logic supervision. Connect a 10 kΩ pull-up resistor from the active-low open-drain output to the 5 V rail, then wire this signal to the microcontroller's active-low RESET pin. This configuration ensures the reset line is cleanly pulled high during normal operation and pulled low within microseconds of a brownout below 4.375 V.
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