VERIFIED CROSS-REFERENCE
DS18B20 alternatives & equivalent parts
1-Wire programmable-resolution digital thermometer; 9-12 bit; -55C to +125C; +/-0.5C accuracy from -10C to +85C; 3.0-5.5 V — common packages: TO-92, SO-8, uSOP-8. Each candidate below cites its manufacturer datasheet; check the relationship badge before substituting.
4 verified alternatives for DS18B20
| Alternative | Manufacturer | Relationship | Key differences | Source |
|---|---|---|---|---|
| DS18B20+ | Analog Devices | Pin-to-pinDrop-in: same footprint and pinout. | Same die and specs in a lead-free TO-92 package. | ADI 官方页面 |
| DS18B20+T&R | Analog Devices | Pin-to-pinDrop-in: same footprint and pinout. | Same TO-92 device supplied on tape and reel. | ADI 官方页面 |
| DS1822+ | Analog Devices | FunctionalSame function: board or design change needed. | Same TO-92 pinout, 3.0-5.5 V and 1-Wire software compatibility; Only 11-bit resolution versus 12-bit on the DS18B20; Accuracy about +/-2C (+/-3C max), far worse than +/-0.5C. | ADI 官方页面 |
| MAX31820MCR+ | Analog Devices | FunctionalSame function: board or design change needed. | Same TO-92 GND/DQ/VDD pin order and 1-Wire software compatibility; 3.0-3.7 V supply only; not a safe drop-in on 5 V rails; +/-0.5C guaranteed only from +10C to +45C. | ADI 官方页面 |
Pre-replacement checklist
- Verify the same 3-pin GND/DQ/VDD order and 1-Wire timing before swapping.
- Confirm supply rails: DS18B20 runs 3.0-5.5 V, but MAX31820 is 3.0-3.7 V only.
- Check accuracy needs: DS1822 is only about +/-2C, not +/-0.5C.
- Parasite-power designs must keep the strong pull-up on DQ.
Need the exact lot, date code or a second source quoted?
Send the original MPN and the approved alternative. Sourceics reconfirms source, stock, date code and commercial terms before any order — no substitution without your engineering approval.
Request a quote for DS18B20Source part reference: ADI 官方页面. Equivalence notes are reference guidance, not a guarantee of fit — always verify against your schematic and layout.