TC74 datasheet(3/16 Pages) MICROCHIP

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DS21462B-page 3

TC74

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

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

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

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

Operating Temperature (TA)........................ See Below

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

*Stresses above those listed under "Absolute Maximum Rat-

ings" may cause permanent damage to the device. These are

stress ratings only and functional operation of the device at

these or any other conditions above those indicated in the

operation sections of the specifications is not implied. Expo-

sure to Absolute Maximum Rating conditions for extended

periods may affect device reliability.

TC74 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VDD =3.3V or 5.0V (Note 5),-40°C ≤ TA ≤ 125°C, unless otherwise noted.

Symbol

Parameter

Min

Typ.

Max

Unit

Test Conditions

Power Supply

VPOR

Power-on Reset Threshold

1.2

—

2.2

VDD Falling Edge or Rising Edge

IDD

Operating Current

—

200

350

µAVDD =5.5V

Serial Port Inactive (Note 1)

IDD-STANDBY

Standby Supply Current

—

µAV

DD =3.3V

Serial Port Inactive (Note 1)

Temperature to Bits Converter

TERR

Temperature Accuracy TC74A

-2

-3

—

—+2

—

°C

+25°C <TA <+85°C

0°C < TA < +125°C

-40°C < TA <0°C

Conversion Rate

—

Sps

(Note 2)

Serial Port Interface

VIH

Logic Input High

0.8 x VDD

——

VIL

Logic Input Low

—

0.2 x VDD

VOL

SDA Output Low

—

0.4

0.6

IOL =3mA

IOL =6mA (Note 3)

CIN

Input Capacitance SDA, SCL

—

ILEAK

I/O Leakage

-1

0.1

µA

Note

Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification.

Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec.

Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and

temperature drift error.

SDA and SCLK must be connected to VDD or GND.

VDD = 3.3V for TC74X -3.3VCT. VDD = 5.0V for TC74X -5.0VCT. 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.

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