© 2002 Microchip Technology Inc.

DS21462B-page 3

TC74

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

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

*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

Symbol

Parameter

Min

Typ.

Max

Unit

Test Conditions

Power Supply

Power-on Reset Threshold

1.2

—

2.2

V

Operating Current

—

200

350

Serial Port Inactive (Note 1)

Standby Supply Current

—

5

10

µAV

Serial Port Inactive (Note 1)

Temperature to Bits Converter

Temperature Accuracy TC74A

-2

-3

—

—+2

—

+2

°C

CR

Conversion Rate

4

8

—

Sps

(Note 2)

Serial Port Interface

Logic Input High

——

V

Logic Input Low

—

—

V

SDA Output Low

—

—

—

—

0.4

0.6

V

V

Input Capacitance SDA, SCL

—

5

—

pF

I/O Leakage

-1

0.1

1

µA

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:

5: