DS1631U/T&R Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1631U/T&R 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. The device is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. This reference provides direct equivalents and manufacturer-recommended substitutes based on electrical and mechanical compatibility parameters.

Substiute Parts

DS1631U/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1001DS1631U/T&R Datasheet

Current PartRFQ

DS1631U+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 2593DS1631U+T&R Datasheet

DirectRFQ

TCN75-3.3MUA

Microchip TechnologyIn Stock: 1281TCN75-3.3MUA Datasheet

MFR RecommendedRFQ

TCN75-3.3MUA713

Microchip TechnologyIn Stock: 1955TCN75-3.3MUA713 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS1631U/T&R is determined by the following critical parameters: sensor type (digital, local), temperature sensing range (-55°C to 125°C), output protocol (I2C), supply voltage compatibility (2.7V ~ 5.5V), package form factor (8-TSSOP/8-MSOP), and mounting type (surface mount). Parts meeting these core electrical and mechanical specifications are classified as direct equivalents or manufacturer-recommended substitutes.

The substitute parts identified maintain compatibility across these parameters while accounting for differences in resolution and accuracy specifications. Resolution differences (11-bit versus 8-bit) and accuracy variations (±0.5°C versus ±3°C) represent the primary technical distinctions between the main part and substitutes, but do not prevent functional substitution in applications where these parameter variations are acceptable.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete DS1631U/T&R, the DS1631U+T&R represents the direct equivalent with identical electrical specifications and active product status. This part maintains 11-bit resolution and ±0.5°C accuracy while offering ROHS3 compliance and improved supply availability.

The Microchip TCN75-3.3MUA and TCN75-3.3MUA713 are manufacturer-recommended substitutes suitable for applications where 8-bit resolution and ±3°C accuracy are acceptable. Both TCN75 variants maintain the required temperature range, I2C interface, and supply voltage compatibility. The TCN75-3.3MUA713 offers the advantage of Cut Tape & Digi-Reel packaging with higher inventory availability, while the TCN75-3.3MUA is supplied in tube format.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, supporting modern regulatory requirements. Selection between direct equivalents and manufacturer-recommended substitutes depends on application accuracy requirements and packaging format preferences.

Frequently Asked Questions (FAQ)

Q: Can the TCN75-3.3MUA replace the DS1631U/T&R in existing designs?

A: The TCN75-3.3MUA maintains electrical compatibility across temperature range, I2C interface, and supply voltage specifications. The primary differences are 8-bit resolution versus 11-bit and ±3°C accuracy versus ±0.5°C. Substitution is valid for applications where these accuracy and resolution parameters are acceptable.

Q: What is the difference between DS1631U+T&R and DS1631U/T&R?

A: Both parts are electrically identical with matching 11-bit resolution and ±0.5°C accuracy. The primary difference is packaging format: DS1631U/T&R uses Tape & Reel format, while DS1631U+T&R uses Cut Tape & Digi-Reel format. The DS1631U+T&R has active product status and improved availability.

Q: Are the TCN75 variants pin-compatible with the DS1631U/T&R?

A: Yes. Both the TCN75-3.3MUA and TCN75-3.3MUA713 use the same 8-TSSOP/8-MSOP package form factor as the DS1631U/T&R, ensuring mechanical and electrical pin compatibility.

Q: What packaging options are available for substitutes?

A: DS1631U+T&R is available in Cut Tape & Digi-Reel format. TCN75-3.3MUA is supplied in tube packaging. TCN75-3.3MUA713 is available in Cut Tape & Digi-Reel format. Selection depends on production volume and handling requirements.

Q: Do all substitute parts meet current compliance standards?

A: Yes. DS1631U+T&R, TCN75-3.3MUA, and TCN75-3.3MUA713 are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original DS1631U/T&R is RoHS non-compliant.