DS1631 Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1631 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 with 11-bit resolution and I2C output interface. The device operates on a 2.7V to 5.5V supply and features programmable resolution, output switching, and standby mode capabilities.

The DS1631 is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure continued availability for new designs, maintenance applications, and production continuity where original stock becomes depleted.

Substiute Parts

DS1631

Analog Devices Inc./Maxim IntegratedIn Stock: 1604DS1631 Datasheet

Current PartRFQ

DS1631+

Analog Devices Inc./Maxim IntegratedIn Stock: 951DS1631+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1631 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Identical sensor type (Digital, Local)
• Matching temperature sensing range (-55°C ~ 125°C)
• Equivalent resolution (11 bits)
• Same output interface (I2C)
• Compatible supply voltage range (2.7V ~ 5.5V)
• Identical accuracy specifications
• Same package and mounting configuration (8-DIP Through Hole)
• Matching feature set (One-Shot, Output Switch, Programmable Limit, Programmable Resolution, Standby Mode)

The DS1631+ meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The DS1631+ is the direct substitute for the DS1631. Both parts share identical electrical specifications, resolution, accuracy, and feature sets. The primary distinction is product status and regulatory compliance.

The DS1631 is obsolete and no longer in active production. The DS1631+ is an active product from the same manufacturer with identical functional characteristics. Selection of the DS1631+ is appropriate for new designs and applications requiring continued component availability.

The DS1631+ carries ROHS3 compliance, whereas the DS1631 is non-compliant. This distinction is relevant for applications subject to RoHS regulations. Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the DS1631+ directly replace the DS1631 in existing designs?

A: Yes. The DS1631+ is electrically and mechanically identical to the DS1631. Pin configuration, I2C protocol, supply voltage requirements, temperature range, resolution, and accuracy specifications are equivalent. No circuit modifications are required.

Q: What is the primary reason to substitute the DS1631?

A: The DS1631 is classified as obsolete and no longer manufactured. The DS1631+ provides identical functionality with active production status and improved regulatory compliance (ROHS3).

Q: Are there packaging differences between the DS1631 and DS1631+?

A: Both parts use the same 8-DIP package (0.300", 7.62mm) with through-hole mounting. The DS1631+ is supplied in tube packaging, while the DS1631 packaging specification was not provided. The physical footprint and pin layout are identical.

Q: Does the DS1631+ meet RoHS requirements?

A: Yes. The DS1631+ is ROHS3 compliant. The original DS1631 is RoHS non-compliant. This distinction is significant for applications in regulated industries or regions with RoHS mandates.

Q: Are the I2C communication protocols identical between both parts?

A: Yes. Both the DS1631 and DS1631+ implement the same I2C interface, register structure, and command set. Software and firmware compatibility is maintained.