MCP809T-475I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
The MCP809T-475I/TT is a single-channel voltage supervisor and microprocessor reset IC from Microchip with a fixed 4.75 V threshold in a tiny SOT-23 3-pin package. It monitors supply voltage and asserts a reset signal when the rail falls below the programmed level. Ideal for microcontroller reset management in consumer, industrial, and automotive embedded systems.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP809T-475I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2750(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 4.75 V reset threshold for precise supply monitoring without external resistors
- Single-channel voltage supervisor in compact SOT-23-3 package
- Active-low reset output for direct microcontroller RESET pin connection
- RoHS-compliant lead-free construction for green design requirements
- Low quiescent current for use in battery-powered applications
Applications
The MCP809T-475I/TT is used in embedded system power-management circuits to ensure microcontrollers and FPGAs initialize correctly when supply voltage rises above 4.75 V. It is well suited for automotive body-control modules, industrial PLCs, and consumer appliances that require reliable brown-out protection. The tiny SOT-23 footprint enables integration directly adjacent to the supervised device on space-constrained PCBs.
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 |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.96mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.625V |
| 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
Compatible alternatives and drop-in replacements for MCP809T-475I/TT:
suggested
suggested
suggested
suggested
Voltage Supervisor/Reset IC, Fixed, 1 Channel, +4.475V, PDSO3
Frequently Asked Questions
At what voltage level does MCP809T-475I/TT assert its reset output, and how is that threshold set?
The MCP809T-475I/TT has a factory-fixed reset threshold of 4.75 V with no adjustable external resistors required. When the monitored supply drops below 4.75 V, the device immediately asserts its active-low reset output to hold the microcontroller in reset until the voltage recovers and exceeds the threshold.
Which microcontroller reset architectures benefit most from using MCP809T-475I/TT instead of a simple RC reset circuit?
Microcontrollers with active-low MCLR or RESET pins benefit most, because the MCP809T-475I/TT provides a guaranteed 4.75 V threshold with a typical reset timeout delay, whereas a passive RC circuit suffers from process variation and offers no guaranteed trip point, risking spurious resets in systems with noisy 5 V rails.
How does the SOT-23-3 package of MCP809T-475I/TT compare to larger reset IC packages for high-density board layouts?
The SOT-23-3 package occupies only about 1.6 mm × 2.9 mm of PCB area with 3 pins on a 0.95 mm pitch, which is significantly smaller than an SOT-89 or TO-92 package, allowing designers to place the reset supervisor within a few millimeters of the microcontroller RESET pin to minimize trace inductance and improve noise immunity.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6000 | $0.60 |
| 25+ | $0.5000 | $12.50 |
| 100+ | $0.4600 | $46.00 |
| 1000+ | $0.3700 | $370.00 |
| 3000+ | $0.2800 | $840.00 |
| 9000+ | $0.2750 | $2475.00 |
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