MCP101T-475I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
The MCP101T-475I/TT is a microprocessor supervisor IC from Microchip with a fixed 4.625 V reset threshold, active-low open-drain output, and a tiny SOT-23-3 package. It monitors supply voltage in 5 V microcontroller and embedded systems to generate clean power-on and brownout resets.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP101T-475I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1006(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 4.625 V threshold voltage for reliable brownout and power-on reset detection in 5 V systems
- Ultra-compact SOT-23-3 package (under 2 mm × 2 mm) minimizing PCB area near the decoupling network
- Active-low open-drain reset output drives RST pins on MCUs and logic gates directly without external pull-down
- Low quiescent current and wide operating temperature range for always-on supervisory functions in industrial equipment
Applications
The MCP101T-475I/TT is used as the supervisory watchdog for 5 V microcontroller boards, PLC I/O modules, and embedded industrial controllers where a brownout below 4.625 V must immediately assert a clean reset to prevent corrupted program execution. Its tiny SOT-23-3 footprint allows placement directly adjacent to the MCU reset pin with minimal routing, and the open-drain output is compatible with standard 5 V CMOS logic. Systems powered by unregulated wall adapters or automotive 5 V rails particularly benefit from its precise threshold monitoring during startup and transients.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 19Weeks |
| YTEOL | 8 |
| 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) | 4.5V |
| 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 | +4.62V |
| 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 | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what supply voltage does the MCP101T-475I/TT assert its reset output and hold the MCU in reset?
The MCP101T-475I/TT asserts its active-low reset output whenever the monitored supply drops below 4.625 V, holding the connected microcontroller in reset for the entire duration the supply remains below threshold plus a minimum reset timeout period after the supply recovers above 4.625 V. This prevents code execution during marginal supply conditions that could cause data corruption in EEPROM or SRAM. The typical threshold accuracy is within ±2% over temperature.
How does the MCP101T-475I/TT's open-drain output connect to a 5 V MCU reset pin?
The open-drain RST output requires an external pull-up resistor, typically 10 kΩ to 100 kΩ, connected to the 5 V rail. When the supply is healthy, the output floats high through the pull-up, releasing the MCU reset. When supply dips below 4.625 V the transistor pulls the RST line low, holding the MCU in reset. The open-drain configuration also allows multiple reset sources such as watchdog timers and manual reset buttons to be wire-ORed on the same RST net.
For a system already using a 4.75 V threshold supervisor, what distinguishes MCP101T-475I/TT as a closer-fit alternative?
With a 4.625 V threshold, the MCP101T-475I/TT trips 125 mV earlier than a 4.75 V device, giving the MCU an additional guard band against transients before the minimum rated 4.5 V supply floor of many 5 V MCUs. This tighter margin reduces the probability of a corrupted SPI Flash write when the supply droops during heavy load transients. Both devices share the same SOT-23-3 footprint and pin-out, so swapping from a 4.75 V to the 4.625 V variant requires no PCB redesign.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3820 | $0.38 |
| 25+ | $0.1040 | $2.60 |
| 100+ | $0.1023 | $10.23 |
| 250+ | $0.1006 | $25.15 |
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