TC74A0-3.3VAT Microchip Integrated Circuit (Transistor Outline, Vertical) In Stock
The Microchip TC74A0-3.3VAT is a simple I2C-compatible digital temperature sensor that reports temperature as an 8-bit digital word via a 2-wire serial interface, operating from a 3.3 V supply. With ±2°C accuracy over 0°C to 125°C and a 5-pin TO-220 package, it suits embedded thermal monitoring in space-constrained designs.
- Manufacturer
- Microchip
- Package
- Transistor Outline, Vertical
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TC74A0-3.3VAT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.3344(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit digital temperature output via 2-wire I2C-compatible interface
- Single 3.3 V supply operation with low standby current for energy-efficient designs
- Accuracy of ±2°C over the 0°C to 125°C measurement range
- Compact 5-pin TO-220 package for easy board mounting and thermal coupling
- Pb-free, RoHS-compliant construction with JEDEC e3 finish code
Applications
TC74A0-3.3VAT is used in embedded system thermal management to monitor PCB or component temperatures in consumer electronics, industrial controllers, and computer peripherals. It provides a cost-effective I2C temperature reading for fan speed control, over-temperature shutdown logic, and environmental data logging in designs running from 3.3 V rails.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TO-220-5 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | R-PSFM-T5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | NO |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What temperature measurement range and accuracy does TC74A0-3.3VAT provide for embedded thermal monitoring?
TC74A0-3.3VAT measures temperatures from 0°C to 125°C and reports values with ±2°C accuracy. The 8-bit digital output provides 1°C per LSB resolution, which is sufficient for fan control, over-temperature warning, and ambient thermal management without requiring a precision analog front-end.
How does TC74A0-3.3VAT communicate with a microcontroller, and how many I/O lines are required?
TC74A0-3.3VAT uses a 2-wire I2C-compatible serial interface, requiring only SDA and SCL signal lines in addition to VDD and GND. This minimal 2-wire connection allows multiple TC74 sensors to share the same I2C bus at different addresses, reducing pin count on resource-constrained microcontrollers.
Is TC74A0-3.3VAT suitable for a 3.3 V-only design, and does it need an external reference or ADC?
Yes. TC74A0-3.3VAT is specifically rated for 3.3 V single-supply operation and integrates the ADC, reference, and serial interface internally. No external analog components are needed, so the sensor can be connected directly to a 3.3 V MCU I2C bus with only a pair of pull-up resistors, typically 4.7 kΩ.
What package does TC74A0-3.3VAT ship in and how does it differ from the smaller SOT-23 variant for PCB placement?
TC74A0-3.3VAT is housed in a 5-pin TO-220 plastic package. Compared to a SOT-23-5 body, the TO-220 is significantly larger but provides a metal tab that can be thermally coupled to a heat source or chassis, making it better suited for monitoring component temperatures rather than pure ambient air sensing.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.3344 | $1.33 |
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