HTF3226LF Equivalent & Substitute Parts

Part Overview

The HTF3226LF is a humidity and temperature sensor manufactured by TE Connectivity Measurement Specialties. This sensor operates at 5V supply voltage and outputs frequency signals proportional to humidity and temperature measurements. The device is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support and new design implementations. The HTF3226LF provides frequency output at 8.75kHz @ 55%RH with ±5% RH accuracy and a 10-second response time across a 1–99% RH measurement range.

Substiute Parts

HTF3226LF

TE Connectivity Measurement SpecialtiesIn Stock: 83996HTF3226LF Datasheet

Current PartRFQ

HPP808H031

TE Connectivity Measurement SpecialtiesIn Stock: 2050HPP808H031 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HTF3226LF is based on the following critical parameters that must align between the main part and substitute components:

Electrical Compatibility:

• Supply voltage range: 4.75V ~ 5.25V (5V nominal operation)
• Output type: Frequency-based signal output
• Sensor type: Humidity and temperature measurement capability

Mechanical and Environmental Compatibility:

• Package type: Sensor on Exposed Board
• Moisture sensitivity level: MSL 1 (Unlimited)
• Response time: 10 seconds

Functional Parameters:

• Humidity measurement range overlap
• Operating temperature range compatibility
• Frequency output characteristics

The HPP808H031 qualifies as a substitute based on matching supply voltage, output type, package configuration, response time, and moisture sensitivity level. Both sensors operate within the 4.75V–5.25V supply range, provide frequency-based output, and are packaged as sensors on exposed boards with MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

The HPP808H031 is an active product from TE Connectivity Measurement Specialties and serves as the primary substitute for the obsolete HTF3226LF. Both sensors share identical supply voltage specifications, output type, package configuration, response time, and moisture sensitivity rating, establishing direct electrical and mechanical compatibility.

The HPP808H031 provides an extended operating temperature range (-40°C to 85°C versus -30°C to 85°C) and an expanded humidity measurement range (0–100% RH versus 1–99% RH), offering broader environmental coverage. The substitute sensor maintains the same 10-second response time and MSL 1 rating.

Differences in frequency output characteristics (6.60kHz @ 55%RH for HPP808H031 versus 8.75kHz @ 55%RH for HTF3226LF) and sensitivity (12Hz/%RH versus 14Hz/%RH) require signal processing adjustments in applications where frequency-to-humidity conversion algorithms are implemented. System firmware or calibration routines must be updated to accommodate the different frequency scaling.

The HPP808H031 holds active product status and RoHS3 compliance certification, supporting long-term availability and regulatory alignment for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the HPP808H031 directly replace the HTF3226LF without circuit modifications?

A: The HPP808H031 is electrically and mechanically compatible with the HTF3226LF due to matching supply voltage (4.75V–5.25V), output type (frequency), package configuration (sensor on exposed board), and response time (10 seconds). However, the frequency output differs: HPP808H031 outputs 6.60kHz @ 55%RH with 12Hz/%RH sensitivity, while HTF3226LF outputs 8.75kHz @ 55%RH with 14Hz/%RH sensitivity. Signal processing firmware or calibration tables must be updated to correctly interpret the different frequency scaling.

Q: What is the humidity measurement range difference between these sensors?

A: The HTF3226LF measures humidity from 1–99% RH, while the HPP808H031 measures from 0–100% RH. The HPP808H031 provides extended range coverage at both the lower and upper humidity limits, offering broader measurement capability for applications requiring full-span humidity detection.

Q: Are there supply voltage compatibility concerns?

A: Both sensors operate within the identical 4.75V–5.25V supply voltage range. No power supply modifications are required for substitution.

Q: What is the operating temperature range difference?

A: The HTF3226LF operates from -30°C to 85°C, while the HPP808H031 operates from -40°C to 85°C. The HPP808H031 extends the lower temperature limit by 10°C, supporting applications in colder environments.

Q: Does the HPP808H031 have the same packaging as the HTF3226LF?

A: Yes, both sensors use the same package type: sensor on exposed board. Mechanical mounting and board layout compatibility are maintained.

Q: What compliance certifications apply to the HPP808H031?

A: The HPP808H031 is RoHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory requirements of the obsolete HTF3226LF.

Q: Why is the HTF3226LF classified as obsolete?

A: The HTF3226LF is no longer in active production. The HPP808H031 represents the current active alternative from TE Connectivity Measurement Specialties for humidity and temperature sensing applications requiring frequency output at 5V supply voltage.