STMicroelectronics' high-speed comparators combine nanosecond propagation delay with ultralow power consumption, ensuring fast and accurate event detection in even the most demanding applications. Featuring rail-to-rail inputs, wide supply voltage ranges, and robust noise immunity, they deliver reliable performance across industrial and automotive environments.
TS3121P: Rail-to-rail, open-drain comparator with embedded Power-on Reset
Benefits
Available in standard tiny packages like SC70-5 or SOT23-5L, these high-speed comparators are ideal for space-constrained designs requiring best-in-class speed, precision, and efficiency.
- Engineered for fast event detection and precise signal conditioning, these comparators combine:
- Ultrafast response for sharp, reliable triggering
- 5 V operation with excellent noise immunity
- Low power consumption to extend battery life in portable systems
- Robust performance across temperature and supply variations
Applications
Ideal for industrial control, motor drives, power management, EV battery charging, and measurement equipment, ST’s high-speed comparators help you detect critical events earlier, filter signals more effectively, and improve the overall responsiveness of your system.
.jpg)
Rail-to-rail, open-drain 5 V comparator with Power-on Reset
Combining a wide supply range (1.7 to 5.5 V) with ultra‑low power consumption (90 μA typ.) and a fast 60 ns propagation delay, the TS3121P delivers accurate, high-speed threshold detection without compromising efficiency.
Its embedded Power‑on Reset (PoR) guarantees a known, glitch‑free output during supply ramp-up, enabling repetitive on/off measurement cycles and helping reduce overall system power in energy‑saving designs.
With rail‑to‑rail inputs, open-drain output, high ESD robustness (4 kV HBM) and an extended temperature range from -40 °C to +125 °C, the TS3121P is perfectly suited for controllers, sensors, power tools, and overcurrent protection circuits. Its compact package helps minimize PCB area and cost, while functional safety documentation supports safety‑critical system design.
eDesignSuite
eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.
Power Management Design Center
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
Power Management Design Center
Power Supply Design Tool
Power Management Design Center
LED Lighting Design Tool
Power Management Design Center
Digital Power Workbench
Power Management Design Center
Power Tree Designer
Thermal-electrical Simulators for Components
STPOWER Studio
Thermal-electrical Simulators for Components
PCB Thermal Simulator
Thermal-electrical Simulators for Components
AC Switches Simulator
Thermal-electrical Simulators for Components
Rectifier Diodes Simulator
Thermal-electrical Simulators for Components
Twister Sim
Thermal-electrical Simulators for Components
TVS Simulator
Thermal-electrical Simulators for Components
Estimate
Signal Conditioning Design Tool
Active Filters
Signal Conditioning Design Tool
Comparators
Signal Conditioning Design Tool
Low side Current Sensing
Signal Conditioning Design Tool
High side Current Sensing
NFC/RFID Calculators
NFC Inductance
NFC/RFID Calculators
UHF Link Budget
NFC/RFID Calculators
