Is there a pin-compatible replacement for DS18B20U(MY)?

No replacement is verified as pin-compatible. GX18B20U shares the same MSOP-8 package and pin count, but its pinout must be confirmed against the DS18B20U(MY) datasheet before assuming it is a drop-in replacement.

What risks should I check before replacing DS18B20U(MY)?

Before replacing, check the minimum supply voltage (a candidate may need 2.5V vs the target's 1.8V), confirm the pinout is identical to avoid board changes, and test for any minor firmware incompatibilities with resolution or timing.

DS18B20U(MY) Alternatives, Datasheet & Cross Reference | Mysentech

DS18B20U(MY) is a popular 1-Wire digital temperature sensor in an MSOP8 package. Alternatives exist, but require careful review of supply voltage, resolution, and pinout compatibility.

AI replacement insight

Electrical riskmedium

Candidate GX18B20U requires a higher minimum supply voltage (2.5V vs 1.8V).

Package riskmedium

While GX18B20U matches the package, its pinout is unverified and must be confirmed.

Firmware risklow

Both use the 1-Wire protocol, but minor timing or resolution differences may exist.

Can it be replaced directly?

No verified direct drop-in replacement has been identified. GX18B20U is a form-fit-function alternative that requires engineering review to confirm pinout and voltage compatibility.

Best replacement path

GX18B20U is the strongest candidate due to its matching MSOP-8 package and 1-Wire interface, but its higher minimum supply voltage (2.5V) must be compatible with the application.

Main risk

The primary risks are electrical incompatibility due to different minimum supply voltages and potential pinout differences requiring board layout changes.

Recommended alternatives

Strong functional and package match, but requires review of supply voltage and pinout.

View details

Alternative comparison matrix

Feature / factor	DS18B20U(MY)	GX18B20U	Compatibility / risk
Package	MSOP8	MSOP-8	MSOP-8 — Package type and pin count match.
Interface	1-Wire	1-Wire	1-Wire — Both use 1-Wire digital interface.
Voltage	1.8V to 5.5V	2.5V to 5.5V	2.5V to 5.5V — Higher minimum supply voltage required.
Accuracy	±0.5°C	±0.4°C	±0.4°C — Candidate has slightly better accuracy.
Resolution	9-14 bit	9 to 12 Bits	9 to 12 Bits — Target has a higher configurable resolution.

Application & sourcing insights

Questions & answers

The best available alternative is GX18B20U from GXCAS. It matches the MSOP-8 package and 1-Wire interface, but you must verify your system can supply its 2.5V minimum voltage and confirm the pinout is identical.