MCP9802A0T-M/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
MCP9802A0T-M/OT is a Microchip digital temperature sensor with I2C/SMBus interface and up to 12-bit resolution. It features a programmable alert output and ±3°C maximum accuracy over its operating range. Supplied in a miniature SOT-23-5 package suited for space-constrained thermal monitoring applications.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP9802A0T-M/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3261(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 9-bit to 12-bit programmable resolution via I2C interface for accuracy versus speed trade-off
- ±3°C maximum accuracy across the operating temperature range for general thermal monitoring
- Programmable ALERT output pin configurable as comparator or interrupt for autonomous thermal protection
- I2C/SMBus compatible 2-wire interface operating at up to 400 kHz for easy MCU integration
- Miniature SOT-23-5 package measuring only 2.95 × 1.63 × 1.45 mm for dense PCB layouts
- Supports 3 address pins allowing up to 8 devices on a single I2C bus
Applications
MCP9802A0T-M/OT is used in PCB thermal management, battery charger temperature monitoring, and portable medical devices where compact size and I2C connectivity simplify system design. Its configurable alert threshold enables autonomous fan control and overcurrent protection without continuous MCU polling.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Accuracy-Max (Cel) | 3Cel |
| Body Breadth | 1.63mm |
| Body Height | 1.45mm |
| Body Length or Diameter | 2.95mm |
| 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 | TSOP5/6,.11,37 |
| Package Shape/Style | RECTANGULAR |
| 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 | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does configuring MCP9802A0T-M/OT to 12-bit mode affect its conversion time versus 9-bit mode?
At 9-bit resolution the conversion completes in approximately 30 ms, while 12-bit mode extends conversion time to about 240 ms. Designers trade measurement speed for ±0.0625°C resolution step size when selecting between these modes.
Can multiple MCP9802A0T-M/OT sensors share a single I2C bus without address conflicts?
The device supports 3 hardware address pins (A0, A1, A2), enabling up to 8 unique 7-bit I2C addresses on one bus, ideal for multi-zone thermal monitoring systems using a single 400 kHz I2C channel.
How does the ALERT output on MCP9802A0T-M/OT enable autonomous over-temperature protection?
The ALERT pin asserts when the measured temperature exceeds the programmable upper limit register, operating as an open-drain comparator output that can directly drive a fan controller or interrupt a host processor without continuous polling.
What accuracy does MCP9802A0T-M/OT guarantee, and is that sufficient for PCB thermal runaway detection?
The device guarantees ±3°C maximum accuracy, which is adequate for detecting thermal runaway margins of 10°C to 20°C typical in power supply and battery management circuits where catastrophic failure thresholds exceed this uncertainty.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8500 | $0.85 |
| 100+ | $0.6400 | $64.00 |
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| 500+ | $0.3340 | $167.00 |
| 1000+ | $0.3261 | $326.10 |
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