Match the reference to the application.
The design specifies MCP9808. Plan the address straps and host configuration for every device sharing the bus.
Review the specification →GUILCOR · Digital sensing
MCP9808
temperature sensors
Digital local temperature sensing with configurable resolution and thermal alert limits. Plan address straps before installing several sensors on one bus.
Understand the reference
Plan addresses for multiple measurement points.
Each address strap combination identifies one device on an unsegmented bus. A bus scan confirms a response at an address but cannot separate two devices configured to use that same address.
SELECTION / YOUR APPLICATION
Is MCP9808 the right starting point?
Review STTS751 alongside MCP9808.
Compare the actual measured quantity, interface, supply and logic levels, package and host driver. A similar address or protocol name does not establish a drop-in replacement.
Explore STTS751 →Keep the complete specification together.
Use the exact manufacturer reference and board or module revision. Check pinout, electrical levels, addressing or chip selection, commands and data decoding.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
Interactive application guide
Choose the address straps.
Shows the standard address block beginning at 0x18. Most host APIs expect the 7-bit address; only pass a shifted address byte when the API explicitly requires it.
7-bit device address
Write / read address bytes
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Technical reference
Reference details for the application.
| IC temperature range | −40 to +125 °C |
|---|---|
| Supply | 2.7 to 5.5 V |
| Maximum error at 3.3 V | ±0.5 °C from −20 to +100 °C; ±1 °C over −40 to +125 °C |
| Selectable steps | 0.5, 0.25, 0.125 or 0.0625 °C |
| Address range used here | 0x18 to 0x1F, selected by A2 / A1 / A0 |
| Alerts | Lower, upper and critical temperature limits |
Apply the limits to the right component.
The sensing IC, finished probe and host electronics have separate requirements. Cable insulation, sealing, connector, supply and mounting may impose a narrower operating range. A temperature step is not an accuracy guarantee, and an electronic conversion time is not a thermal response time.
Useful for multi-zone thermal supervision. Record each physical location and its address in the installation documentation.
Wiring and integration
Specify the electrical interface and sensing path.
Device connections
Tie address pins to defined logic levels according to the datasheet. Review existing board pullups before adding more modules.
Shared bus integration
SDA and SCL usually need pullups to a compatible logic supply. Select them for bus capacitance, rise time and the devices that pull the lines low. Cable length, connectors and level shifters change the electrical behaviour.
Use 7-bit addresses consistently in the host API. Check clock stretching, timeout and recovery support. Successful communication does not prove that the reading is fresh or that the sensor is mounted at a representative measurement point.
Acquisition sequence
Make each reading traceable.
Discover
Confirm the part, address, supply and measurement mode.
Convert
Issue the device-specific command and satisfy its timing and power needs.
Validate
Read the correct registers, check CRC where provided and reject invalid or stale results.
Use
Apply the correct decoder or compensation, units and application limits.
Measurement quality
Separate electrical behaviour from thermal performance.
Accuracy and calibration
Choose the error limit over the actual operating interval. Add installation and readout effects. Define any calibration and periodic verification required by the application; factory calibration does not establish a universal no-maintenance policy.
Response and mounting
A sheath, potting material and mounting contact change how fast the sensing element follows the medium. Verify response in the intended flow and installation, rather than using conversion time as the finished-probe response.
Power and self-heating
Average dissipation depends on supply, conversion duty and surrounding electronics. Test the assembled probe at the intended reading rate. Do not assume a universal self-heating offset from the interface name.
Form factor library
Choose your probe format.
Choose the shape and mounting for the measurement point. These are GUILCOR probe families and a design service; confirm the compatible element, dimensions, cable and complete assembly for the selected reference.
Frequently asked questions
Questions before specifying the assembly.
Can I connect eight sensors without further checks?
Eight address combinations are available in this block, but bus loading, supply, timing and cable arrangement still need validation.
Can all I²C sensors share one bus?
Only when addresses, voltage levels, timing and host support are compatible. Fixed duplicate addresses may require a multiplexer or separate bus.
Is I²C a long-distance industrial interface?
It is commonly used for communication within electronic assemblies. Longer cables require an electrical design and validation appropriate to the installation; there is no universal permitted length.
What should I send for a probe quotation?
Send the reference and full ordering code, measured quantities, operating interval, error and response requirements, mounting drawing, cable and connector, host interface and quantity.
Technical sources
Continue with the reference documents.
GUILCOR / YOUR ENQUIRY
Define your MCP9808 enquiry.
Send the device and host references with the electrical and mechanical requirements. Distinguish the sensing element or converter from the complete installed assembly.
Missing a reference or datasheet?
Send the component marking, equipment reference and any photographs or documents you have. These provide a starting point for identifying what must be confirmed.
The outline helps prepare your enquiry. Copying it does not send a request.
FOUR DETAILS THAT MOVE THE DISCUSSION FORWARD
01
Device and host
Full device or module reference, host interface, supply and logic levels, address or chip-select arrangement, pinout and driver or command requirements.
02
Measurement conditions
Measured quantities, operating interval, required accuracy, update rate, conversion timing and alert behaviour where applicable.
03
Assembly and connection
PCB or probe dimensions, thermal or airflow path, mounting, connector, cable arrangement and environmental protection.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.