MCP809T-315I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP809T-315I/TT is a microprocessor supervisory reset IC from Microchip with a fixed 3.15 V threshold and active-low push-pull reset output. It requires no external components and monitors supply voltage in a tiny 3-pin SOT-23 package with ultra-low quiescent current.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP809T-315I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2622(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP809T-315I/TT?
- Fixed 3.15 V reset threshold with ±2% accuracy ensures reliable microcontroller reset assertion before the supply drops below the minimum operating voltage, preventing erratic code execution during brown-out events
- Active-low push-pull reset output directly drives MCU reset pins without an external pull-up resistor, saving a component compared to open-drain supervisors in 3.3 V systems
- 3-pin SOT-23 package with no external capacitors or resistors required delivers the smallest possible supervisory circuit footprint for space-constrained PCBs in wearables and IoT nodes
What is MCP809T-315I/TT used for?
The MCP809T-315I/TT is designed to supervise the power supply of 3.3 V microcontrollers and FPGAs, asserting a clean reset signal whenever VCC drops below 3.15 V to prevent corrupted register initialization during power-up or brown-out conditions. It is commonly used in consumer electronics, industrial sensor nodes, and IoT gateway boards where a dedicated hardware supervisor is more reliable than a software brown-out detection module. The tiny SOT-23 footprint and zero external component requirement make it the default choice for reset supervision in densely packed multi-board embedded systems.
What are the specifications of MCP809T-315I/TT?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 15Weeks |
| 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) | 3V |
| 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 | +3.075V |
| 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 MCP809T-315I/TT datasheet?
MCP809T-315I/TT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP809T-315I/TT?
Compatible alternatives and drop-in replacements for MCP809T-315I/TT:
suggested
suggested
Frequently Asked Questions
What is the exact reset threshold voltage of MCP809T-315I/TT and how accurate is it?
The MCP809T-315I/TT triggers its reset output when VCC falls below 3.15 V, with a factory-trimmed threshold accuracy of ±2%. This means the actual trip point is guaranteed between 3.087 V and 3.213 V, ensuring reliable reset assertion before the supply drops below the minimum 3.0 V operating voltage of most 3.3 V microcontrollers.
Does the MCP809T-315I/TT output require an external pull-up resistor?
No external pull-up resistor is needed. The MCP809T-315I/TT features a push-pull output stage that actively drives the RESET pin to logic low during a supervisory event and returns it to a high level when VCC exceeds the threshold, unlike open-drain alternatives that require an external 10 kΩ to 100 kΩ pull-up resistor.
How long does MCP809T-315I/TT hold the reset signal after VCC recovers above the threshold?
The device generates a minimum reset pulse width of 140 ms (typical) after VCC rises above the 3.15 V threshold. This 140 ms delay ensures oscillators, regulators, and power rails fully stabilize before the microcontroller is released from reset, eliminating spurious start-up failures caused by insufficient power-rail settling time.
What operating temperature range and quiescent current does MCP809T-315I/TT support?
The MCP809T-315I/TT operates over a -40°C to +125°C industrial temperature range and draws a typical quiescent current of only 18 µA from the monitored VCC rail, making it suitable for always-on supervisory functions in battery-powered and energy-harvesting designs where minimizing standby current is critical.
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About Microchip
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4364 | $0.44 |
| 6+ | $0.2641 | $1.58 |
| 48000+ | $0.2622 | $12585.60 |
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