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Specifications
Temperature Range:
-40℃~+125℃
standby current:
10uA
Interface:
SMBus;I2C
Temperature Resolution:
8bit
Voltage - Supply:
2.7V~5.5V
Mfr. Part #:
TC74A5-5.0VCTTR
Package:
SOT-23-5
Key Attributes
Model Number:
TC74A5-5.0VCTTR
Product Description
Product Overview
The TC74 is a serially accessible, digital temperature sensor designed for low-cost and small-form-factor applications. It converts temperature from an onboard 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. The TC74 features a low-power Standby mode, activated by the SHDN bit in the CONFIG register, reducing quiescent current to 5 A (typ.). With a temperature resolution of 1C and a nominal conversion rate of 8 samples/sec, it offers ease of use and 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 | |
| Serial Port AC Timing (CLOAD = 80 pF) | ||||||
| SMBus/I2C Clock Frequency | fSMB | 10 | - | 100 | kHz | |
| 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 for Hard Disk Drives and other PC Peripherals
- PC Card Devices for Notebook Computers
- Low Cost Thermostat Controls
- Power Supplies
- Thermistor Replacement
2410121851_MICROCHIP-TC74A5-5-0VCTTR_C626609.pdf
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