MCP100T-475I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
The MCP100T-475I/TT is a single-channel microprocessor supervisor IC with a fixed 4.625 V reset threshold for monitoring 5 V power rails. It generates a reset pulse when supply voltage falls below the threshold, protecting microcontrollers from brownout and power-on glitches. Available in a tiny SOT-23-3 package for minimal PCB footprint in space-constrained designs.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP100T-475I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1824(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 reset threshold precisely monitors 5 V supply rails without external resistors or adjustments
- Single-channel supervisor generates active-low or active-high reset pulse on undervoltage detection
- Ultra-compact SOT-23-3 package with only 3 pins minimizes PCB area to under 10 mm²
- Low quiescent current consumption extends battery life in always-on monitoring circuits
- No external components required — fully integrated voltage supervision in a self-contained IC
Applications
The MCP100T-475I/TT is used in 5 V microcontroller and microprocessor systems to assert a clean reset signal during power-up, brownout, and power-fail events, preventing firmware lockup and data corruption. It is a drop-in reset supervisor for PIC, AVR, and 8051-based boards where a discrete RC reset network is insufficient for reliable cold-start behavior across temperature and supply variation. The SOT-23-3 package makes it ideal for board-level reset circuits on densely populated PCBs in industrial controls, consumer appliances, and communication equipment.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 8Weeks |
| 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 | +4.63V |
| 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 | Mainland China, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What reset threshold voltage does the MCP100T-475I/TT monitor, and which supply rail is it designed for?
The MCP100T-475I/TT monitors a fixed 4.625 V reset threshold, making it specifically designed for 5 V supply rails. When the supply drops below 4.625 V, the device asserts its reset output to hold the microprocessor in a safe reset state, preventing erratic firmware execution during brownouts or slow power-on ramp events on 5 V logic systems.
How does the MCP100T-475I/TT simplify 5 V MCU reset design compared to a discrete RC network?
A discrete RC reset network relies on capacitor charging time and tolerances that shift with temperature and supply impedance, making the reset duration unpredictable. The MCP100T-475I/TT provides a precision 4.625 V threshold with a fixed reset pulse width of approximately 140 ms, eliminating component tolerance stack-up and ensuring reliable reset behavior across the full -40°C to +125°C operating temperature range.
What is the quiescent current consumption of the MCP100T-475I/TT and why does it matter for always-on systems?
The MCP100T-475I/TT consumes typically less than 50 µA of quiescent current during normal monitoring operation, making it negligible in almost any power budget. In battery-backed systems with a 5 V rail maintained by a supercapacitor or lithium cell, this low current draw ensures the supervisor itself does not measurably shorten hold-up time during a mains power outage.
Can the MCP100T-475I/TT be used in 3.3 V microcontroller designs, or is it limited to 5 V rails?
The MCP100T-475I/TT is calibrated to a fixed 4.625 V threshold and is not suitable for monitoring 3.3 V rails. For 3.3 V supervision, Microchip offers MCP100 variants with lower thresholds, such as the MCP100T-315 with a 3.15 V trip point or MCP100T-300 at 3.0 V, covering the full range of common logic supply voltages from 3.0 V to 5 V.
Which package does the MCP100T-475I/TT use and how does board space compare to a larger SOT-23-5 supervisor?
The MCP100T-475I/TT uses a 3-pin SOT-23-3 package measuring approximately 2.9 mm x 1.3 mm, which is smaller than a 5-pin SOT-23-5 footprint by roughly 30% in pin pitch area. The 3-pin package is sufficient because this single-channel supervisor needs only VDD, GND, and RESET connections, with no enable or manual-reset pins, keeping the PCB layout simple and compact.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2628 | $0.26 |
| 9000+ | $0.1920 | $1728.00 |
| 12000+ | $0.1856 | $2227.08 |
| 24000+ | $0.1840 | $4415.28 |
| 48000+ | $0.1824 | $8755.20 |
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