MCP809T-270I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP809T-270I/TT is a single-channel voltage supervisor and microcontroller reset IC from Microchip with a fixed 2.625 V threshold and active-low open-drain output. It monitors supply rails with a 140 ms minimum reset assertion time, housed in a 3-pin SOT-23 package for space-constrained 2.5 V to 3.3 V system reset and brownout-protection applications.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP809T-270I/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
Key Features
- Fixed 2.625 V reset threshold for 2.7 V and 3.3 V supply monitoring
- Active-low open-drain output for direct microcontroller RESET pin drive
- 140 ms minimum reset assertion timeout after supply recovers
- Ultra-small 3-pin SOT-23 package minimises board space
- Low 15 µA typical supply current for battery-conscious designs
- Fixed threshold with ±2% accuracy over temperature
Applications
The MCP809T-270I/TT is used to hold microcontrollers and FPGAs in reset during power-up or brownout events on 2.5 V to 3.3 V supply rails, preventing code execution from a partially powered system. Battery-operated equipment such as handheld meters, wearables, and IoT nodes rely on its 15 µA supply current and tiny SOT-23 footprint to add reliable brownout protection without impacting battery life. It also suits watchdog companion circuits in embedded designs where a separate supervisor is needed alongside the main MCU.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 6Weeks |
| 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) | 2.55V |
| 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 | +2.625V |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what supply voltage does the MCP809T-270I/TT assert its reset output, and for how long does it hold it low?
The MCP809T-270I/TT asserts its active-low reset output when the monitored supply falls below 2.625 V and holds it asserted for at least 140 ms after the supply recovers above threshold. This 140 ms window gives most microcontrollers and oscillators sufficient time to stabilise before code execution resumes.
How does the 3-pin SOT-23 package affect board integration compared to a 5-pin or 8-pin supervisor?
The 3-pin SOT-23 occupies less than 3 mm² of PCB area, making it the smallest practical supervisor option for portable devices and IoT modules where every square millimetre counts. Compared to 5-pin or 8-pin supervisors, it trades away manual-reset input and watchdog features but keeps cost and footprint at their minimum for single-rail 2.625 V threshold monitoring.
Is the MCP809T-270I/TT suitable for designs powered by two AA alkaline batteries in series?
Two alkaline AA cells in series provide approximately 3.0 V fresh, dropping to around 2.0 V near end-of-life. The MCP809T-270I/TT asserts reset at 2.625 V, correctly signalling the microcontroller to stop executing well before the supply becomes unstable, protecting data integrity and preventing flash corruption in battery-powered loggers and sensor nodes.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6000 | $0.60 |
| 6+ | $0.2641 | $1.58 |
| 48000+ | $0.2622 | $12585.60 |
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