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. Communication is achieved via a 2-wire SMBus/I2C compatible serial port, enabling multi-drop/multi-zone monitoring. The device offers a low-power Standby mode, activated by the SHDN bit in the CONFIG register. With a temperature resolution of 1C and a nominal conversion rate of 8 samples/sec, the TC74 is ideal for implementing 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 |
|---|---|---|---|---|---|---|
| Absolute Maximum Ratings | ||||||
| Supply Voltage | VDD | +6 | V | |||
| Voltage On Any Pin | (GND 0.3V) | (VDD + 0.3V) | V | |||
| Current On Any Pin | 50 | mA | ||||
| Operating Temperature | TA | -40 | +125 | C | ||
| Storage Temperature | TSTG | -65 | +150 | C | ||
| Junction Temperature | TJ | +150 | C | |||
| DC 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 | +2.0 | C | +25C <TA < +85C | |
| Temperature Accuracy | TERR | -3.0 | +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 | |
| AC Timing | ||||||
| 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) | ||
Notes:
1: Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification.
2: Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec.
3: Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and temperature drift error.
4: SDA and SCLK must be connected to VDD or GND.
5: VDD = 3.3V for TC74AX-3.3VXX. VDD = 5.0V for TC74AX-5.0VXX. All part types of the TC74 will operate properly over the wider power supply range of 2.7V to 5.5V. Each part type is tested and specified for rated accuracy at its nominal supply voltage. As VDD varies from the nominal value, accuracy will degrade 1C/V of VDD change.
2410121852_MICROCHIP-TC74A5-3-3VAT_C641452.pdf
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
