STSC1 Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The STSC1 is a digital temperature sensor manufactured by Sensirion AG, designed for local temperature measurement across the range of -40°C to 125°C in a compact 4-DFN (2x2) surface mount package. The device communicates via I2C interface and operates on a supply voltage of 1.62V to 1.98V with an accuracy of ±0.3°C.

The STSC1 has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Substiute Parts

STSC1

Sensirion AGIn Stock: 923STSC1 Datasheet

Current PartRFQ

STS-30-DIS

Sensirion AGIn Stock: 5872STS-30-DIS Datasheet

MFR RecommendedRFQ

STS-31-DIS

Sensirion AGIn Stock: 2296STS-31-DIS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STSC1 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Sensor Type: Digital, Local temperature measurement
• Output Interface: I2C communication protocol
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant
• Manufacturer: Sensirion AG (same manufacturer ecosystem)

Secondary Consideration:

• Operating Temperature Range: Both substitutes support the full -40°C to 125°C operating range required by the STSC1

The substitute parts STS-30-DIS and STS-31-DIS are members of the STS3 series and maintain I2C interface compatibility with the STSC1. Both substitutes operate across the same full temperature range and meet equivalent compliance standards.

Parameter Comparison

Engineering Selection Recommendations

Both STS-30-DIS and STS-31-DIS are active product alternatives to the obsolete STSC1. Selection between these substitutes depends on the specific temperature measurement range required by the application:

STS-30-DIS is suitable for applications requiring temperature measurement within 0°C to 65°C. This substitute provides improved accuracy (±0.2°C versus ±0.3°C) and 16-bit resolution.

STS-31-DIS is suitable for applications requiring temperature measurement within 0°C to 90°C. This substitute also provides improved accuracy (±0.2°C versus ±0.3°C) and 16-bit resolution.

Both substitutes are ROHS3 compliant and maintain active product status, ensuring long-term availability and supply chain stability. The increased supply voltage range (2.15V to 5.5V) of both substitutes provides greater design flexibility compared to the STSC1's narrow 1.62V to 1.98V range.

Frequently Asked Questions (FAQ)

Q: Can STS-30-DIS or STS-31-DIS directly replace STSC1 in existing designs?

A: Direct pin-for-pin replacement is not possible due to package differences. The STSC1 uses a 4-pin DFN package, while both substitutes use an 8-pin DFN package. PCB layout and routing modifications are required.

Q: What is the key difference between STS-30-DIS and STS-31-DIS?

A: The primary difference is the sensing temperature range. STS-30-DIS measures 0°C to 65°C, while STS-31-DIS measures 0°C to 90°C. Both maintain identical I2C interface compatibility and accuracy specifications.

Q: Are the substitute parts compatible with STSC1 firmware and software?

A: Both substitutes use the same I2C communication protocol as the STSC1. Firmware compatibility depends on the specific I2C register implementation and command set used in the original design. Verification with Sensirion documentation is required.

Q: What are the supply voltage implications of switching to STS-30-DIS or STS-31-DIS?

A: The substitutes require a minimum supply voltage of 2.15V, compared to the STSC1's 1.62V minimum. Designs operating at voltages below 2.15V cannot use these substitutes without additional voltage regulation circuitry.

Q: Do both substitutes maintain the same moisture sensitivity level as STSC1?

A: Yes. All three parts have Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.