DS1631S Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1631S is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across the -55°C to 125°C range. This component operates via I2C interface with 11-bit resolution and is housed in an 8-SOIC surface mount package. The DS1631S is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

DS1631S

Analog Devices Inc./Maxim IntegratedIn Stock: 2305DS1631S Datasheet

Current PartRFQ

DS1631S+

Analog Devices Inc./Maxim IntegratedIn Stock: 1409DS1631S+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1631S is determined by strict alignment across the following critical parameters:

• Sensor type classification (Digital, Local)
• Temperature sensing range (-55°C ~ 125°C)
• Communication protocol (I2C)
• Supply voltage compatibility (2.7V ~ 5.5V)
• Resolution specification (11 bits)
• Accuracy performance (±0.5°C / ±2°C)
• Physical package format (8-SOIC)
• Feature set (One-Shot, Output Switch, Programmable Limit, Programmable Resolution, Standby Mode)

Parts meeting all these criteria are classified as direct functional equivalents and may be substituted without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The DS1631S+ serves as the direct functional equivalent for the obsolete DS1631S. Both components share identical electrical specifications, temperature operating range, I2C interface protocol, and physical package dimensions. The DS1631S+ is currently in active production status, ensuring long-term availability and supply chain continuity.

The DS1631S+ achieves ROHS3 compliance, whereas the original DS1631S does not meet RoHS requirements. This distinction is significant for applications subject to environmental regulations or customer specifications mandating RoHS compliance. Both components maintain REACH Unaffected status and EAR99 export classification.

Selection between these parts should be based on regulatory requirements and supply availability. For new designs or systems requiring RoHS compliance, the DS1631S+ is the appropriate choice. For legacy system maintenance where RoHS compliance is not a constraint, either part provides equivalent functionality.

Frequently Asked Questions (FAQ)

Q: Can the DS1631S+ be used as a direct replacement for the DS1631S in existing circuits?

A: Yes. The DS1631S+ is electrically and mechanically identical to the DS1631S. Both components feature the same I2C interface, supply voltage range (2.7V ~ 5.5V), temperature measurement range (-55°C ~ 125°C), 11-bit resolution, and 8-SOIC package footprint. No circuit modifications are required for substitution.

Q: What is the primary difference between the DS1631S and DS1631S+?

A: The DS1631S+ is the active production variant with ROHS3 compliance, while the DS1631S is classified as obsolete and does not meet RoHS requirements. Functionally, both components are equivalent.

Q: Are there any packaging differences between these parts?

A: The DS1631S+ is supplied in tube packaging, while the DS1631S is supplied in bulk format. Both use the same 8-SOIC physical package. Packaging format does not affect electrical performance or circuit compatibility.

Q: What accuracy specifications apply to these temperature sensors?

A: Both the DS1631S and DS1631S+ provide ±0.5°C accuracy across the 0°C to 70°C operating range and ±2°C accuracy across the full -55°C to 125°C range.

Q: Are these sensors suitable for remote temperature measurement?

A: No. Both the DS1631S and DS1631S+ are classified as local temperature sensors only. They measure the temperature at the sensor die location and do not support remote temperature sensing.