LM809M3-2.45 Texas Instruments In Stock
LM809M3-2.45 is a Texas Instruments 3-pin microprocessor supervisor with a 2.45 V fixed threshold in SOT-23 package. It provides a 200 ms reset delay over -40°C to +125°C. In stock worldwide for MCU power supervision.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM809M3-2.45?
- Fixed 2.45 V voltage-monitoring threshold enables reliable MCU brown-out detection with no external components
- 200 ms reset output delay ensures VCC is fully stable before releasing the microcontroller from reset
- Ultra-low 1 uA quiescent current ideal for battery-powered IoT nodes and energy-harvesting embedded designs
- SOT-23-3 package with only 3 pins minimizes board space for space-constrained wearable and industrial designs
What is LM809M3-2.45 used for?
The LM809M3-2.45 is widely used to supervise microcontroller power rails in embedded systems, asserting a reset signal whenever VCC drops below 2.45 V to prevent corrupted firmware execution. Its ultra-low 1 uA quiescent current makes it ideal for battery-operated IoT nodes, handheld instruments, and wearable electronics where standby power must be minimized. Industrial PLCs and automotive ECUs also benefit from its clean startup reset sequencing across the full -40°C to +125°C operating range.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LM809M3-2.45?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what voltage does LM809M3-2.45 assert its reset output and how long does the reset hold last?
The LM809M3-2.45 pulls its active-low reset output when VCC drops below the factory-trimmed 2.45 V threshold, then holds reset for 200 ms after VCC recovers to guarantee stable power before the microcontroller resumes execution. No external resistors or capacitors are needed, simplifying board design and reducing bill-of-materials cost.
Which battery-powered MCU designs benefit most from LM809M3-2.45 given its quiescent current draw?
With only 1 uA of quiescent current, the LM809M3-2.45 is ideal for IoT sensors, medical wearables, and remote data loggers where minimizing standby power is critical. A 200 mAh coin cell can supply the supervisor for years without meaningful charge loss, making it a negligible drain in duty-cycled embedded designs.
How does the 3-pin SOT-23 package of LM809M3-2.45 simplify integration into dense PCB layouts?
The LM809M3-2.45 occupies the compact 3-pin SOT-23-3 package, enabling placement directly adjacent to the MCU VCC supply pin on high-density boards. Its 3-wire connection (VCC, GND, RESET) eliminates the need for passive timing components, keeping the full supervisory circuit footprint well under 10% of a typical MCU pad area.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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