NS18B20-QTOS
NOVOSENSE Microelectronics
Needs validationmedium risk
A likely pin-compatible 1-Wire sensor in a TO-92 package, but requires verifying the higher minimum supply voltage.
Best Alternatives to DS18B20(MY)
The Mysentech DS18B20(MY) is a widely-used 1-Wire digital temperature sensor. This page reviews and compares potential replacements, focusing on key differences in voltage, accuracy, and package.
AI replacement insight
Electrical riskmedium
Most alternatives have a higher minimum supply voltage.
Package risklow
Multiple candidates match the common TO-92 package.
Firmware risklow
The 1-Wire protocol is standardized and widely cloned.
Can it be replaced directly?
Direct replacement for DS18B20(MY) should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
For TO-92 packages, NS18B20-QTOS is a strong candidate if the 2.7V minimum supply is acceptable. For SMT designs, GX18B20U offers better accuracy in an MSOP-8 package.
Main risk
The primary risk is the higher minimum supply voltage of most alternatives, which may not work in 1.8V or 2.5V systems.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | DS18B20(MY) | NS18B20-QTOS | GX1820 | GX18B20U | Compatibility / risk |
|---|---|---|---|---|---|
| Package | TO-92 | TO-92 | TO-92 | MSOP-8 | TO-92 / MSOP-8 — Matches common TO-92 variant of target.; GX1820: matched; GX18B20U: Matches one of target's package options, but is a different form factor from TO-92. |
| Interface | 1-Wire | 1-Wire | 1-Wire | 1-Wire | 1-Wire — matched; GX1820: matched; GX18B20U: matched |
| Voltage | 1.8V to 5.5V | 2.7V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.7V to 5.5V / 2.5V to 5.5V — Higher minimum voltage.; GX1820: Higher minimum voltage.; GX18B20U: Higher minimum voltage. |
| Accuracy | ±0.5°C (-10°C to +85°C) | ±0.5°C (-10°C to +85°C) | ±0.5°C (-10°C to +70°C) | ±0.4°C (-10°C to +85°C) | ±0.5°C (-10°C to +85°C) / ±0.5°C (-10°C to +70°C) / ±0.4°C (-10°C to +85°C) — matched; GX1820: High-accuracy range is smaller.; GX18B20U: Slightly better accuracy. |
| Resolution | 12-bit (configurable to 14-bit) | 9 to 12 bits | - | - | 9 to 12 bits — Target has a 14-bit configurable mode. |
Application & sourcing insights
Questions & answers
Verified drop-in options for DS18B20(MY) are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.