DS1621S
digital thermometer and thermostat with 2-wire interface and nonvolatile trip-point registers
Key details
| Part Number | DS1621S |
|---|---|
| Manufacturer | Analog Devices (Maxim Integrated) |
| Category | Digital Temperature Sensor |
| Lifecycle Status | Production |
| Series | DS1621 |
| Package / Case | 8-pin SOIC, 150 mil |
| Pin Count | 8 |
| Operating Temperature | -55°C to +125°C sensing range |
| Last Verified | 2026-07-20 |
Part information
DS1621S Overview
DS1621S is a Analog Devices (Maxim Integrated) digital thermometer and thermostat with 2-wire interface and nonvolatile trip-point registers supplied in 8-pin SOIC, 150 mil. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.
Key Technical Specifications
| Resolution | 9 bit |
|---|---|
| Accuracy | ±0.5°C from 0°C to +70°C |
| Supply Voltage | 2.7 V to 5.5 V |
| Interface | 2-wire serial |
| Thermostat Output | Standalone programmable output |
Package and Ordering Notes
The listed package is 8-pin SOIC, 150 mil with 8 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. The part or family is listed by Analog Devices (Maxim Integrated) as Production at the verification date.
Sourcing Guidance
Confirm current factory lead time, packing format and revision for DS1621S before placing the order.
For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.
Manufacturer Documentation
Technical values were checked against Analog Devices (Maxim Integrated) documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.
DS1621S selection and design context
DS1621S is cataloged as a Digital Temperature Sensor in the DS1621 family. Its recorded function is digital thermometer and thermostat with 2-wire interface and nonvolatile trip-point registers. Selection should be based on the complete electrical limits, package drawing and ordering suffix rather than the abbreviated family code.
- Resolution: 9 bit. Use the worst-case datasheet limit rather than a typical headline value.
- Accuracy: ±0.5°C from 0°C to +70°C. Use the worst-case datasheet limit rather than a typical headline value.
- Supply Voltage: 2.7 V to 5.5 V. Check rail compatibility, tolerance and sequencing under worst-case conditions.
- Interface: 2-wire serial. Confirm logic levels, signaling mode, host support and required external components.
Application and qualification considerations
When evaluating this sensor, confirm measurement range, sensitivity, noise, output data rate, interface voltage, calibration needs and mechanical orientation. For a new design, review power-up behavior, interface timing, absolute maximum ratings, thermal limits and any external-component requirements in the latest manufacturer documentation. Existing-board replacement work should additionally confirm pinout, footprint, firmware assumptions and qualification grade.
Procurement checks for DS1621S
The recorded package is 8-pin SOIC, 150 mil, the temperature range is -55°C to +125°C sensing range, and the lifecycle status is Production as of 2026-07-20. Before ordering, confirm the exact MPN on the label, packing format, quantity, date-code requirements, traceability documents and current factory status.
DS1621S FAQ
What distinguishes DS1621S within the DS1621 family?
DS1621S is the exact orderable code for a digital thermometer and thermostat with 2-wire interface and nonvolatile trip-point registers in 8-pin SOIC, 150 mil. Related DS1621 devices may change package, rating, interface option or qualification grade, so compare the manufacturer ordering table before substitution.
What package and footprint checks are required for DS1621S?
DS1621S is recorded in 8-pin SOIC, 150 mil with 8 pins, leads or contacts. Confirm the manufacturer package drawing, dimensions, pin numbering, exposed-pad requirements and packing suffix before releasing a PCB footprint.
Which specifications should be verified when selecting DS1621S?
Resolution is recorded as 9 bit, Accuracy is recorded as ±0.5°C from 0°C to +70°C. Use the latest datasheet for minimum and maximum limits, test conditions, timing and absolute maximum ratings rather than relying only on a distributor summary.
What is the lifecycle status of DS1621S?
DS1621S was recorded as Production when verified on 2026-07-20. Reconfirm factory status, revision availability, lead time and any last-time-buy notice before design-in or volume procurement.
What information should be included in an RFQ for DS1621S?
Provide the complete DS1621S orderable code, target quantity, acceptable date-code range, required packing method, delivery destination and documentation needs. For replacement work, also identify the existing package and any mandatory qualification grade.
Lifecycle and sourcing review
Lifecycle information is shown for reference. Confirm current manufacturer documentation, availability and technical suitability before purchase.
Confirm current factory lead time, packing format and revision for DS1621S before placing the order.