TC74A0-3.3VCTTRG 查看數據表（PDF） - Microchip Technology

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TC74A0-3.3VCTTRG

Tiny Serial Digital Thermal Sensor

Microchip Technology 

TC74

1.0 ELECTRICAL

CHARACTERISTICS

1.1 Absolute Maximum Ratings†

Supply Voltage (VDD) ............................................ +6V

Voltage On Any Pin ....... (GND – 0.3V) to (VDD + 0.3V)

Current On Any Pin ..........................................±50 mA

† Notice: Stresses above those listed under "Maximum

Ratings" may cause permanent damage to the device.

This is a stress rating only and functional operation of

the device at those or any other conditions above those

indicated in the operation listings of this specification is

not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

Operating Temperature (TA) ........ -40°C  TA  +125°C

Storage Temperature (TSTG) ..............-65°C to +150°C

Junction Temperature (TJ)................................ +150°C

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise noted, VDD = 3.3V for TC74AX-3.3VXX and

VDD = 5.0V for TC74AX-5.0VXX, -40°C  TA  125°C. Note 5

Parameters

Sym

Min

Typ

Max Units

Conditions

Power Supply

Power-on Reset Threshold

VPOR

1.2

—

2.2

V VDD Falling Edge or Rising

Edge

Supply Voltage

Operating Current

Standby Supply Current

VDD

2.7

—

5.5

IDD

—

200

350

IDD-STANDBY

—

5.0

10

V Note 5

µA VDD = 5.5V, Note 1

µA VDD = 3.3V

Serial Port Inactive, Note 4

Temperature-to-Bits Converter

Temperature Accuracy

Conversion Rate

TERR

CR

-2.0

—

+2.0

-3.0

—

+3.0

—

±2.0

—

°C +25°C <TA < +85°C

0°C < TA < +125°C

-40°C < TA < 0°C

4

8

—

SPS Note 2

Serial Port Interface

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

—

—

0.6

V IOL = 6 mA, Note 3

Input Capacitance SDA, SCLK

CIN

—

5.0

—

pF

I/O Leakage

ILEAK

-1.0

0.1

1.0

µA

Serial Port AC Timing (CLOAD = 80 pF)

SMBus/I2C Clock Frequency

fSMB

10

—

100 kHz

Low Clock Period

tLOW

4.7

—

—

µsec 10% to 10%

High Clock Period

SMBus/I2C Rise Time

SMBus/I2C Fall Time

tHIGH

tR

tF

4.0

—

—

µsec 90% to 90%

—

—

1000 nsec 10% to 90%

—

—

300 nsec 90% to10%

Note 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 -3.3 VXX. VDD = 5.0V for TC74AX -5.0 VXX. 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 1°C/V

of VDD change.

DS21462D-page 2

 2001-2012 Microchip Technology Inc.

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