MCP9509CT-E/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
The MCP9509CT-E/OT is a resistor-programmable temperature switch IC that sets its trip threshold via an external resistor, delivering a digital output when the ambient temperature crosses the programmed limit. It integrates threshold detection without an MCU in a compact 5-pin SOT-23 package with matte tin finish. Available from stock with RoHS-compliant construction and worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP9509CT-E/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4897(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Resistor-programmable temperature trip point allows flexible threshold setting without firmware, using a single external resistor to define the switch temperature
- Standalone digital output temperature switch operates independently without a microcontroller, reducing system complexity in over-temperature protection circuits
- Ultra-compact 5-pin SOT-23 package with matte tin terminal finish fits into space-constrained PCB layouts for thermal management in consumer and industrial designs
Applications
The MCP9509CT-E/OT is ideal for over-temperature protection applications in power supplies, battery chargers, and motor drives where a simple digital alert or shutdown signal must be triggered when a programmable temperature limit is exceeded. Its resistor-programmable trip point eliminates the need for a microcontroller and I2C firmware, making it suitable for low-cost, low-complexity thermal cutoff circuits in home appliances and LED lighting systems. The tiny SOT-23-5 footprint enables placement close to heat-generating components such as power transistors or voltage regulators for accurate local temperature sensing.
Specifications
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| JESD-609 Code | e3 |
| Terminal Finish | Matte Tin (Sn) |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| 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
How is the temperature trip point of the MCP9509CT-E/OT set, and what external components are needed?
The MCP9509CT-E/OT sets its temperature threshold using a single external resistor connected to the resistor-programmable input pin; the resistor value determines the trip temperature according to the datasheet lookup table, eliminating the need for a microcontroller, firmware, or I2C configuration in simple thermal cutoff applications.
For a battery charger over-temperature protection design, why is the MCP9509CT-E/OT preferred over an NTC thermistor and comparator combination?
The MCP9509CT-E/OT integrates the temperature sensing element and threshold comparator in a single 5-pin SOT-23 package, reducing BOM count by at least 3 components compared with a discrete NTC-thermistor plus op-amp comparator solution, lowering cost and PCB area while providing a calibrated digital output directly usable by a protection circuit.
What package does the MCP9509CT-E/OT use, and how does it affect thermal coupling to the monitored component?
The MCP9509CT-E/OT is housed in a 5-pin SOT-23 package, which can be placed within a few millimeters of a heat source such as a power MOSFET or voltage regulator. Its small SOT-23 footprint and matte tin terminal finish allow close proximity mounting, improving thermal coupling and response time compared with larger thermal switch packages.
What is the factory lead time for the MCP9509CT-E/OT, and what does that mean for procurement planning?
The MCP9509CT-E/OT has a 7-week factory lead time, which means procurement teams should plan orders at least 7 weeks ahead of production start to avoid shortages; stocking safety inventory of at least 4 to 6 weeks of consumption is advisable given this lead time for uninterrupted production.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0500 | $1.05 |
| 100+ | $0.8100 | $81.00 |
| 500+ | $0.5063 | $253.15 |
| 1000+ | $0.4980 | $498.00 |
| 3000+ | $0.4897 | $1469.10 |
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