MCP1322T-29LE/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
MCP1322T-29LE/OT is a single-channel voltage supervisor with a 2.90 V reset threshold and manual reset input in a compact SOT-23-5 package. It monitors system supply voltage and asserts a reset signal when voltage drops below threshold. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1322T-29LE/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3889(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 2.90 V threshold voltage supervisor with factory-trimmed precision for reliable system reset detection
- Manual reset input (MR) pin allows external pushbutton or logic-driven reset without additional glue logic
- Tiny SOT-23-5 package with low quiescent current enables space-efficient power sequencing in battery-powered designs
Applications
MCP1322T-29LE/OT is used in microcontroller-based systems to ensure clean power-on and brown-out reset behavior, preventing firmware corruption when supply voltage sags below 2.90 V. It suits portable devices, IoT nodes, and wearables powered from single-cell lithium or AA batteries where supply voltage can drop near processor minimum operating limits. The manual reset pin also makes it practical for field-service reset buttons in industrial equipment and handheld testers.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Additional Feature | BAT BUP SW:N;MNL RST:Y;OV DET:N;PW FL IP:N;PW FL IO:N;PW FL OP:N;PRG RST DLY:N;UV DET:N;WD:N;WWD:N |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.01mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1V |
| Supply Voltage-Nom (Vsup) | 1.5V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.9V |
| Package | SOT23 (5-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 | Malaysia, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what supply voltage does MCP1322T-29LE/OT assert a system reset signal?
MCP1322T-29LE/OT asserts an active-low reset output when the monitored supply drops below its fixed 2.90 V threshold. The device holds reset asserted for a minimum timeout period after voltage recovers above the threshold, ensuring the processor and peripherals stabilize before code execution resumes.
How does the manual reset pin on MCP1322T-29LE/OT work in a pushbutton reset circuit?
The MR (manual reset) input on MCP1322T-29LE/OT is an active-low pin that asserts the reset output when pulled low externally, such as by a momentary pushbutton connected between MR and GND. A 100 kΩ pull-up resistor to VCC keeps MR high during normal operation. This allows board-level reset without additional supervisory ICs or complex glue logic circuits.
Which 3.3 V microcontroller systems benefit most from using MCP1322T-29LE/OT instead of a generic RC reset circuit?
Systems using STM32, PIC32, or AVR processors powered from regulated 3.3 V rails benefit from MCP1322T-29LE/OT because it provides a precision 2.90 V brown-out trip point versus the ±20% tolerance of a simple RC circuit. The device responds within microseconds to voltage droops, preventing the undefined execution state that RC circuits allow during slow supply ramps.
What is the footprint size of MCP1322T-29LE/OT and how does it fit on space-constrained PCBs?
MCP1322T-29LE/OT uses a SOT-23-5 package measuring approximately 2.9 x 1.6 mm with a 0.95 mm pin pitch, one of the smallest SMD supervisor footprints available. This 5-pin layout occupies under 5 mm² of PCB area, making it practical for wearable devices, hearing aids, and any embedded design where supervisor circuitry must not increase board dimensions.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8600 | $0.86 |
| 25+ | $0.7100 | $17.75 |
| 100+ | $0.3920 | $39.20 |
| 250+ | $0.3892 | $97.30 |
| 500+ | $0.3889 | $194.45 |
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