MCP111T-315E/LB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
Microchip MCP111T-315E/LB is a single-channel voltage supervisor that monitors a 3.15 V threshold with a detection window of 3.003 V to 3.157 V. It asserts an active-low reset output to protect microcontrollers during power-up, brownout, or supply glitches. The tiny SC-70 3-pin package minimizes board area in space-constrained designs.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP111T-315E/LB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2100(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP111T-315E/LB?
- Fixed 3.15 V threshold with tight ±2.5% accuracy ensuring reliable brownout detection on 3.3 V rails
- Active-low open-drain reset output compatible with most 3.3 V microcontroller and DSP reset pins
- Ultra-small 3-pin SC-70 package occupying minimal PCB area for density-critical portable designs
- Low quiescent current consumption enabling always-on monitoring in battery-powered systems
What is MCP111T-315E/LB used for?
The MCP111T-315E/LB is used to supervise the 3.3 V supply rail of microcontrollers, FPGAs, and memory devices in industrial sensors, portable medical equipment, and IoT nodes where an unexpected brownout must trigger a controlled system reset. Its tight threshold window ensures the MCU reset is asserted before the supply falls below the minimum operating voltage, preventing data corruption or lock-up. The SC-70 footprint makes it a drop-in supervisor for compact PCBs in wearables, smart meters, and handheld instruments.
What are the specifications of MCP111T-315E/LB?
| Pbfree Code | Yes |
| Manufacturer Package Code | SC70-3 |
| Factory Lead Time | 7Weeks |
| 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 | TSOP3,.08,25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| 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 |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +3.08V |
| 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 |
Where can I find the MCP111T-315E/LB datasheet?
MCP111T-315E/LB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP111T-315E/LB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the exact voltage threshold window of the MCP111T-315E/LB, and why does tight accuracy matter?
The MCP111T-315E/LB monitors a 3.15 V nominal threshold with a detection window of 3.003 V to 3.157 V, representing ±2.5% accuracy. Tight accuracy ensures the reset is asserted before a 3.3 V rail drops below the MCU's minimum operating voltage of typically 3.0 V, preventing unpredictable firmware behaviour during brownout events.
How does the MCP111T-315E/LB reset output interface with a 3.3 V microcontroller reset pin?
The device provides an active-low, open-drain RESET output that can be connected directly to a 3.3 V microcontroller's active-low reset pin with a pull-up resistor of typically 10 kΩ to 100 kΩ. This standard interface requires no level-shifting and is compatible with virtually all 3.3 V logic-family devices.
For a compact IoT sensor PCB, how much board space does the SC-70 package of the MCP111T-315E/LB require?
The SC-70 3-pin package measures approximately 2.0 mm × 1.25 mm with a typical height of 0.95 mm, occupying less than 2.5 mm² of board area. This makes it one of the smallest supervisor packages available and ideal for multi-layer IoT boards where every square millimetre of space is shared among dozens of components.
How does the MCP111T-315E/LB compare to a software brownout detection routine implemented in firmware?
Unlike a firmware-based routine that depends on the MCU itself running correctly, the MCP111T-315E/LB monitors the supply rail autonomously and asserts the reset signal within a guaranteed 200 µs response time even if the processor has already entered an undefined state, providing a hardware safety net that software alone cannot replicate.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4500 | $0.45 |
| 25+ | $0.3700 | $9.25 |
| 100+ | $0.2340 | $23.40 |
| 250+ | $0.2330 | $58.25 |
| 500+ | $0.2320 | $116.00 |
| 3000+ | $0.2100 | $630.00 |
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