MCP112T-290E/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP112T-290E/TT is a fixed 2.9 V threshold voltage detector with active-low open-drain output for power-on reset and brownout detection. Available in SOT-23-3 package with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP112T-290E/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0633(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 2.9 V threshold factory-trimmed for accurate brownout detection without external resistor dividers
- Active-low open-drain output directly driving microcontroller reset pins and logic gate inputs
- Ultra-low quiescent current enabling always-on supply monitoring in battery-constrained designs
- SOT-23-3 package occupying less than 2x3 mm of PCB area for space-efficient reset circuit integration
- RoHS-compliant lead-free construction suitable for consumer and industrial embedded applications
Applications
MCP112T-290E/TT is designed for microcontroller reset supervision and brownout detection in battery-powered IoT devices, embedded sensor nodes, and portable instruments where an unregulated supply may drop below the 2.9 V safe operating limit. Its fixed threshold eliminates external resistor tolerance errors, making it reliable for 3 V system undervoltage lockout in wearables, remote controls, and wireless sensor modules. The device also protects Flash-based microcontrollers from incomplete write cycles caused by brown-out events, preserving data integrity in logging and metering applications.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 29Weeks |
| 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 DETECTOR |
| 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, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 0.00175mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.96mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.9V |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what voltage threshold does MCP112T-290E/TT assert its reset output, and what is the output polarity?
MCP112T-290E/TT asserts its active-low open-drain output when the monitored supply drops below the fixed 2.9 V threshold. The output remains low as long as VCC is below 2.9 V, releasing high (via an external pull-up resistor) once the supply recovers and exceeds the threshold with built-in hysteresis typically around 100 mV, preventing repeated reset toggling during supply voltage ringing.
How does MCP112T-290E/TT protect Flash microcontroller memory integrity during battery-discharge brownout events?
When a battery supply sags below 2.9 V, MCP112T-290E/TT immediately asserts its active-low reset output, halting the microcontroller before the supply falls below the minimum voltage required for valid Flash write cycles, typically 2.3 V to 2.7 V for PIC and AVR devices. This 200 mV to 600 mV margin ensures that in-progress EEPROM or Flash writes are interrupted cleanly rather than completing with corrupted data, protecting firmware integrity and calibration storage.
What are the package dimensions of MCP112T-290E/TT, and why is the SOT-23-3 form factor preferred for reset supervisor circuits?
MCP112T-290E/TT uses a SOT-23-3 package measuring approximately 2.9x1.6 mm with 3 pins on a 0.95 mm pitch. This tiny footprint allows placing the reset supervisor adjacent to the microcontroller VCC pin within a 5 mm keepout zone, minimizing the supply trace length between the detector and the monitored rail and reducing susceptibility to high-frequency supply noise that could cause false reset assertions.
For a 3 V coin-cell powered sensor node, how does MCP112T-290E/TT's fixed threshold compare to a discrete resistor-divider reset circuit?
A discrete resistor voltage divider for a 2.9 V threshold using 1% resistors introduces a threshold error of up to ±2%, equivalent to ±58 mV, potentially allowing the microcontroller to operate at 2.84 V where Flash writes may become unreliable. MCP112T-290E/TT provides a factory-trimmed fixed threshold accurate to within ±2% of 2.9 V over the full -40°C to 125°C range, eliminating resistor tolerance stack-up and saving 2 passive components and their associated PCB area on every board.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.0644 | $0.06 |
| 10+ | $0.0633 | $0.63 |
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