MCP9801-M/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP9801-M/MS is a digital I2C temperature sensor from Microchip with ±3°C accuracy and a configurable 9-to-12-bit resolution, housed in a compact 8-pin MSOP package. Available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP9801-M/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5200(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP9801-M/MS?
- Up to 12-bit ADC resolution providing 0.0625°C temperature steps for fine-grained thermal monitoring
- I2C-compatible interface with 3 programmable address pins supporting up to 8 devices on a single bus
- Alert output for over-temperature detection enabling autonomous fan control or system shutdown without MCU polling
- Compact 3 mm x 3 mm x 1.1 mm MSOP-8 package with Pb-free construction for space-constrained designs
What is MCP9801-M/MS used for?
The MCP9801-M/MS is designed for board-level thermal management in servers, networking switches, and industrial controllers where precise temperature monitoring of hot spots requires ±3°C accuracy over a -55°C to +125°C range. Its configurable 9- to 12-bit resolution allows designers to trade off conversion speed and power consumption depending on the thermal monitoring loop requirements. HVAC systems, smart home thermostats, and medical diagnostic equipment also use this sensor to provide reliable temperature data over a standard I2C bus.
What are the specifications of MCP9801-M/MS?
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Accuracy-Max (Cel) | 3Cel |
| Body Breadth | 3mm |
| Body Height | 1.1mm |
| Body Length or Diameter | 3mm |
| Housing | PLASTIC |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Number of Bits | 12 |
| Operating Current-Max | 0.2mA |
| Output Interface Type | 2-WIRE INTERFACE |
| Output Voltage-Min | 0.4V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape/Style | SQUARE |
| Sensors/Transducers Type | TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2.7V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Termination Type | SOLDER |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP9801-M/MS datasheet?
MCP9801-M/MS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP9801-M/MS?
Compatible alternatives and drop-in replacements for MCP9801-M/MS:
Serial Switch/Digital Sensor, 12 Bit(s), 0.4V Min, 3Cel, Rectangular, 8 Pin, Surface Mount
Frequently Asked Questions
What temperature accuracy and resolution does the MCP9801-M/MS provide, and how does resolution affect measurement time?
The MCP9801-M/MS achieves a maximum accuracy of ±3°C and offers selectable resolution from 9 bits (0.5°C steps, 30 ms conversion) up to 12 bits (0.0625°C steps, 240 ms conversion). Higher resolution improves fine-grained thermal tracking but requires longer conversion times, so designers must balance loop update rate against measurement precision for their application.
How many MCP9801-M/MS sensors can share the same I2C bus, and how are addresses distinguished?
Up to 8 MCP9801-M/MS devices can coexist on a single I2C bus. Each device has 3 address pins (A0, A1, A2) that can be tied to VDD or GND, generating 8 unique 7-bit I2C addresses from 0x48 to 0x4F. This allows a single-bus master such as a microcontroller to monitor 8 independent temperature zones without any additional multiplexing hardware.
Does the MCP9801-M/MS include a hardware alert output, and how can it trigger autonomous system actions?
Yes, the device includes an ALERT output pin that asserts when the measured temperature crosses a user-programmed upper or lower limit register. The alert can trigger a microcontroller interrupt, activate a fan controller, or initiate a hardware reset without continuous MCU polling, reducing firmware complexity and saving CPU cycles in thermal-management loops operating at 1-second or longer intervals.
Over what operating temperature range is the MCP9801-M/MS specified, and is it suitable for outdoor industrial enclosures?
The MCP9801-M/MS is specified for operation from -55°C to +125°C, covering the full industrial and extended temperature range. Outdoor industrial enclosures typically expose equipment to -40°C to +85°C environments, well within the device's guaranteed operating window, making it a reliable choice for field-deployed controllers, motor drives, and environmental monitoring stations.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.7200 | $0.72 |
| 25+ | $0.5430 | $13.58 |
| 100+ | $0.5400 | $54.00 |
| 1000+ | $0.5300 | $530.00 |
| 5000+ | $0.5200 | $2600.00 |
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