Mfr. Part Number
STS21
Manufacturer
Sensirion
Package / Case
6-TDFN Exposed Pad
Datasheet
Description
SENSOR DIGITAL -40C-125C 6DFN
RoHS Status
Lead Free / RoHS Complaint
Availability
Sourcing — Lead time quoted on request (often 3–15 business days by channel)
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STS21
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In Stock4,126
Unit
Price
$3.67
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Reference Price
QuantityPrice
1$ 3.6700
Prices are for reference only. The final transaction is subject to confirmation.
As of 2026-09-20 · Valid as reference until 2026-09-27 · Request RFQ for live stock.
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Specification Summary

Package / Case
6-TDFN Exposed Pad
Supplier Device Package
6-DFN (3x3)
Voltage - Supply
2.1V ~ 3.6V
Operating Temperature
-40°C ~ 125°C
Sensing Temperature - Local
-40°C ~ 125°C
Mounting Type
Surface Mount
Accuracy - Highest (Lowest)
±0.2°C
Features
Sleep Mode
Full specifications are listed below. Need alternates or BOM matching? Read BOM guide · Request a quote
Stock status: Sourcing — Lead time quoted on request (often 3–15 business days by channel)
Shortage / allocation / EOL lines may need longer — ask via RFQ.
Reference price and stock shown as of 2026-09-20. Confirm live availability and unit price via RFQ before placing a PO.
Specifications
Product Description
Purchase & Inquiry
Accuracy - Highest (Lowest)
±0.2°C
Features
Sleep Mode
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 125°C
Sensing Temperature - Local
-40°C ~ 125°C
Sensing Temperature - Remote
-
Test Condition
25°C
Output Type
I²C
Package / Case
6-TDFN Exposed Pad
Resolution
14 b
Sensor Type
Digital, Local
Supplier Device Package
6-DFN (3x3)
Voltage - Supply
2.1V ~ 3.6V
SENSOR DIGITAL -40C-125C 6DFN
Brand Introduction

Sensirion is the leading manufacturer of high-quality sensors and sensor solutions for the measurement and control of humidity, and of gas and liquid flows worldwide. Sensirion’s sensors are used in a wide range of markets and different applications. Sensirion sensor products guarantee outstanding performance and correspondingly high customer utility. They are all based on our innovative CMOSens® Technology, which enables the sensor component to be combined with the analog and digital signal processing circuitry on a tiny CMOS silicon chip. This is implemented in advanced semiconductor technology, using specific microsystem processing steps to produce the microsensor structures on specially developed and patented semiconductor parts. The resulting sensor chips enable precise and reliable sensing of the desired physical parameters, such as relative humidity, temperature, or mass flow. CMOSens® accordingly represents a guarantee of high precision, reliability, and functionality combined with cost effectiveness.

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Buying FAQ — STS21

How do I buy STS21 from Yingxinyuan?

Open RFQ with quantity and target date, or upload a BOM that includes STS21. We reply with stock, channel note, reference price and ETA.

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Prices on the product page are reference only. Confirm unit price, currency and validity via RFQ before placing a PO.

How fresh is the stock figure?

Stock and reference price show an as-of date on the page. Ask for a live confirm — allocation lines can change daily.

How do you source authentic parts?

We source from manufacturers, franchised distributors and verified independents, then inspect incoming lots. See /anti-counterfeit/.

What is a typical lead time?

In-stock lines often ship within 24–48 hours after confirmation. Sourcing / allocation ETAs are quoted per line — see /lead-time-shipping/.