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Specifications
Temperature Range:
-40℃~+125℃
Interface:
I2C;SMBus
Voltage - Supply:
2.7V~5.5V
Mfr. Part #:
TC74A2-3.3VAT
Package:
TO-220-5
Key Attributes
Model Number:
TC74A2-3.3VAT
Product Description
Product Overview
The TC74 is a serially accessible, digital temperature sensor designed for low-cost, small-form-factor applications. It converts temperature data from an onboard thermal sensing element into an 8-bit digital word, accessible via a 2-wire SMBus/I2C compatible serial port. This allows for multi-drop/multi-zone monitoring and features a low-power Standby mode controllable via the SHDN bit. With a temperature resolution of 1C and a nominal conversion rate of 8 samples/sec, the TC74 is ideal for thermal management in various systems.
Product Attributes
- Brand: Microchip Technology Inc.
- Origin: Not specified
- Material: Not specified
- Color: Not specified
- Certifications: Not specified
Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Units | Conditions |
|---|---|---|---|---|---|---|
| Electrical Characteristics | ||||||
| Power-on Reset Threshold | VPOR | 1.2 | 2.2 | V | VDD Falling Edge or Rising Edge | |
| Supply Voltage | VDD | 2.7 | 5.5 | V | Note 5 | |
| Operating Current | IDD | 200 | 350 | A | VDD = 5.5V, Note 1 | |
| Standby Supply Current | IDD-STANDBY | 5.0 | 10 | A | VDD = 3.3V, Serial Port Inactive, Note 4 | |
| Temperature Accuracy | TERR | 2.0 | C | +25C <TA < +85C | ||
| Temperature Accuracy | TERR | 3.0 | C | 0C < TA < +125C | ||
| Conversion Rate | CR | 4 | 8 | SPS | Note 2 | |
| Logic Input High | VIH | 0.8 x VDD | V | |||
| Logic Input Low | VIL | 0.2 x VDD | V | |||
| SDA Output Low | VOL | 0.4 | V | IOL = 3 mA | ||
| SDA Output Low | VOL | 0.6 | V | IOL = 6 mA, Note 3 | ||
| Input Capacitance | CIN | 5.0 | pF | SDA, SCLK | ||
| I/O Leakage | ILEAK | -1.0 | 0.1 | 1.0 | A | |
| SMBus/I2C Clock Frequency | fSMB | 10 | 100 | kHz | Serial Port AC Timing (CLOAD = 80 pF) | |
| Low Clock Period | tLOW | 4.7 | sec | |||
| High Clock Period | tHIGH | 4.0 | sec | |||
| SMBus/I2C Rise Time | tR | 1000 | nsec | 10% to 90% | ||
| SMBus/I2C Fall Time | tF | 300 | nsec | 90% to 10% | ||
| START Condition Setup Time | tSU(START) | 4.0 | sec | 90% SCLK to 10% SDA | ||
| START Condition Hold Time | tH(START) | 4.0 | sec | |||
| Data In Setup Time | tSU-DATA | 1000 | nsec | |||
| Data In Hold Time | tH-DAT | 1250 | nsec | |||
| STOP Condition Setup Time | tSU(STOP) | 4.0 | sec | |||
| Bus Free Time Prior to New Transition | tIDLE | 4.7 | sec | |||
| Power-on Reset Delay | tPOR | 500 | sec | VDD VPOR (Rising Edge) | ||
| Applications | ||||||
| Thermal Protection | Hard Disk Drives and other PC Peripherals | |||||
| PC Card Devices | Notebook Computers | |||||
| Thermostat Controls | Low Cost | |||||
| Power Supplies | ||||||
| Thermistor Replacement | ||||||
2410121852_MICROCHIP-TC74A2-3-3VAT_C641446.pdf
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