TC74A0-5.0VCT データシートの表示（PDF） - Microchip Technology

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TC74A0-5.0VCT

Tiny Serial Digital Thermal Sensor

Microchip Technology 

TC74

TC74 ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: VDD = 3.3V or 5.0V (Note 5), -40°C ≤ TA ≤ 125°C, CL = 80pF unless otherwise noted.

Serial Port AC Timing

Symbol

Parameter

Min Typ. Max

Unit

Test Conditions

fSMB

tLOW

tHIGH

tR

tF

tSU(START)

tH(START)

tSU-DATA

tH-DATA

tSU(STOP)

tIDLE

tPOR

Note 1:

2:

3:

4:

5:

SMBus Clock Frequency

10

—

100

kHz

Low Clock Period

4.7

—

—

µsec 10% to 10%

High Clock Period

4

—

—

µsec 90% to 90%

SMBus Rise Time

SMBus Fall Time

—

—

1000

nsec 10% to 90%

—

—

300

nsec 90% to10%

START Condition Setup Time

(for repeated START Condition)

4

—

—

µsec 90% SCLK to 10% SDA

START Condition Hold Time

4

—

—

µsec

Data In Setup Time

1000 —

—

nsec

Data In Hold Time

1250 —

—

nsec

STOP Condition Setup Time

4

—

—

µsec

Bus Free Time Prior to New Tran- 4.7

—

—

sition

µsec

Power-on Reset Delay

—

500

—

µsec VDD ≥ VPOR (Rising Edge)

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.

DS21462B-page 4

© 2002 Microchip Technology Inc.

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