Microchip TCN75A Digital Temperature Sensor
The Microchip TCN75A is a digital temperature sensor designed to convert ambient temperatures into a digital word with high accuracy. It features user-programmable registers for flexible temperature-sensing applications, allowing for user-selectable resolution, power-saving modes (Shutdown and One-shot), and configurable temperature alert and hysteresis limits. The device outputs an alert signal when the temperature exceeds specified limits, with options for active-low or active-high comparator output for thermostat operation, or interrupt output for microprocessor-based systems. Its industry-standard 2-wire, I2C compatible serial interface enables control of up to eight devices on a single bus, making it ideal for low-cost, sophisticated multi-zone temperature monitoring.
Product Attributes
- Brand: Microchip Technology Inc.
- Product Name: TCN75A
- Interface: 2-wire, I2C Compatible
- Available Packages: MSOP-8, SOIC-8
Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
| Temperature Sensor Accuracy | TACY | -2 | ±1 | +2 | °C | -40°C to +125°C, VDD = 3.3V |
| Operating Voltage Range | VDD | 2.7 | — | 5.5 | V | — |
| Operating Current | IDD | — | 200 | 500 | µA | Continuous operation |
| Shutdown Current | ISHDN | — | 0.1 | 2 | µA | Shutdown mode |
| User-selectable Resolution | — | 0.5 | — | 0.0625 | °C | — |
| Serial Port Frequency | fSC | 0 | — | 400 | kHz | I2C Compatible |
| Conversion Time (0.5°C Resolution) | tCONV | — | 30 | — | ms | 33 samples/sec (typical) |
| Conversion Time (0.0625°C Resolution) | tCONV | — | 240 | — | ms | 4 samples/sec (typical) |
| Thermal Resistance (8L-SOIC) | θJA | — | 163 | — | °C/W | — |
| Thermal Resistance (8L-MSOP) | θJA | — | 206 | — | °C/W | — |
| Specified Temperature Range | TA | -40 | — | +125 | °C | Note 1 |
2410121940_MICROCHIP-TCN75AVUA_C144336.pdf
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