STM1815TWX7F STMicroelectronics Integrated Circuit (SOT23 (3-Pin)) In Stock
The STM1815TWX7F is a single-channel voltage supervisor and reset IC with a fixed threshold in a 3-pin SOT-23 package. It monitors supply rails and asserts a reset signal when voltage drops below the preset trip point, ensuring reliable system startup. Available worldwide with fast shipping from global distributors.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- STM1815TWX7F Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2995(MOQ 250)
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STM1815TWX7F?
- Single-channel voltage supervisor with fixed threshold asserting reset during under-voltage events to protect microcontrollers on supply rails
- Compact 3-pin SOT-23 (TO-236 equivalent) package occupying minimal PCB area in space-constrained embedded and IoT designs
- RoHS-compliant plastic SOT-23 construction suitable for automated SMT assembly in high-volume consumer and industrial electronics production
What is STM1815TWX7F used for?
The STM1815TWX7F is used in embedded systems and IoT devices to monitor microcontroller supply rails, asserting a reset signal when voltage drops below a fixed threshold to prevent code corruption during power-up sequencing and brownout events. Its 3-pin SOT-23 footprint makes it the smallest practical solution for voltage supervision in space-constrained designs such as wearables, sensor nodes, and compact industrial controllers. The fixed-threshold architecture eliminates external resistor dividers, simplifying layout and reducing component count for high-volume production in consumer electronics and smart meter applications.
What are the specifications of STM1815TWX7F?
| Factory Lead Time | 24Weeks |
| YTEOL | 7 |
| 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, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.016mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.2V |
| Supply Voltage-Nom (Vsup) | 3.6V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.96mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +3.06V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the STM1815TWX7F datasheet?
STM1815TWX7F Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STM1815TWX7F?
Compatible alternatives and drop-in replacements for STM1815TWX7F:
Frequently Asked Questions
How does the STM1815TWX7F protect a microcontroller from brownout damage during a power supply dip?
The STM1815TWX7F continuously monitors the supply rail and asserts a reset output when the voltage falls below its fixed threshold, holding the microcontroller in reset for a guaranteed minimum period—typically hundreds of milliseconds—until the supply recovers above the trip point. This prevents the MCU from executing code from an unstable power rail, which can corrupt Flash memory or cause undefined I/O states in embedded control systems operating from 1.8 V to 5 V rails.
For a compact IoT sensor node, how does the 3-pin SOT-23 package of the STM1815TWX7F compare to a 5-pin supervisor IC in terms of board area?
The 3-pin SOT-23 (TO-236) footprint of the STM1815TWX7F measures approximately 1.6 mm × 2.9 mm, which is about 40 % smaller in pad area than a typical 5-pin SOT-23-5 supervisor package. For IoT sensor PCBs where every square millimeter counts, this size reduction allows tighter component placement near the microcontroller's VDD pin without compromising the reset hold time or threshold accuracy.
When is the STM1815TWX7F's fixed-threshold design preferable to an adjustable voltage supervisor for a 3.3 V microcontroller system?
The fixed-threshold STM1815TWX7F is preferable when the target reset trip voltage is known at design time and will not vary across product variants, eliminating the 2-resistor divider network needed by adjustable supervisors. This saves at least 2 BOM line items per board, removes a resistor tolerance error source over the -40 °C to 85 °C operating range, and reduces layout area—benefits that outweigh adjustability in single-voltage embedded systems such as 3.3 V ARM Cortex-M based sensor nodes or smart meter controllers.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $0.3686 | $92.15 |
| 500+ | $0.3226 | $161.30 |
| 1000+ | $0.2995 | $299.50 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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