TC74A2-3.3VCTTR Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip TC74A2-3.3VCTTR is a tiny serial digital temperature sensor operating from a 3.3 V supply, communicating over a 2-wire I2C-compatible interface with 1°C resolution. It measures temperatures from -40°C to +125°C, delivering readings as an 8-bit digital value. Housed in a compact 5-pin SOT-23 package, ideal for space-constrained thermal monitoring applications.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TC74A2-3.3VCTTR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5995(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
- I2C-compatible 2-wire serial interface for simple host integration
- 1°C resolution digital temperature output in 8-bit format
- 3.3 V single-supply operation
- Wide temperature range: -40°C to +125°C
- Tiny 5-pin SOT-23 package for compact PCB placement
- Low quiescent current for battery-friendly always-on monitoring
Applications
The TC74A2-3.3VCTTR is used in thermal management and over-temperature protection circuits within consumer electronics, networking equipment, and industrial controls. Its I2C interface allows microcontrollers to poll temperature readings without dedicated analog inputs, making it ideal for fan-speed control, battery charger thermal limiting, and embedded system health monitoring where board space is at a premium.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 19Weeks |
| YTEOL | 8 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Over what temperature range can the TC74A2-3.3VCTTR measure, and what resolution does it provide?
The TC74A2-3.3VCTTR measures ambient temperature from -40°C to +125°C with a resolution of 1°C per LSB, delivering an 8-bit digital value over the I2C bus. This resolution is sufficient for thermal management tasks such as fan-speed control, over-temperature shutdown at set thresholds, and PCB hot-spot monitoring in networking or industrial enclosures.
How does the TC74A2-3.3VCTTR interface with a microcontroller, and what bus speed is supported?
The sensor uses a 2-wire I2C-compatible serial interface. The address code A2 means it uses a fixed I2C address that differentiates it from other TC74 variants on the same bus, allowing up to several sensors per I2C segment. The bus operates at standard 100 kHz or fast-mode 400 kHz speeds, and a simple register read returns the 8-bit temperature value directly.
For a fanless industrial controller that runs at elevated ambient temperatures, what is the thermal operating limit of TC74A2-3.3VCTTR?
The TC74A2-3.3VCTTR is rated for continuous operation up to +125°C junction temperature, making it suitable for passive-cooled industrial enclosures, motor drives, and power electronics where ambient temperatures can exceed 85°C. The -40°C lower limit also covers cold-start environments in outdoor or automotive auxiliary applications.
What packaging and procurement lead-time considerations apply when sourcing TC74A2-3.3VCTTR in volume?
The TC74A2-3.3VCTTR is supplied in a 5-pin SOT-23 package in tape-and-reel format (TTR suffix), which supports automated SMT assembly at high volume. Factory lead time is approximately 19 weeks, which is notably long, so buyers planning volume production should place orders well ahead of schedule. The part is RoHS Pb-free (JESD-609 code e3) and YTEOL is 8 years.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1500 | $1.15 |
| 25+ | $0.9600 | $24.00 |
| 100+ | $0.9333 | $93.33 |
| 125+ | $0.9084 | $113.55 |
| 400+ | $0.6813 | $272.52 |
| 1000+ | $0.5995 | $599.50 |
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