TC654T datasheet(3/38 Pages) MICROCHIP

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DS20001734C-page 3

TC654/TC655

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings *

VDD...................................................................................6.5V

Input Voltages ...................................... -0.3V to (VDD + 0.3V)

Output Voltages .................................... -0.3V to (VDD + 0.3V)

Storage temperature .....................................-65°C to +150°C

Ambient temp. with power applied ................-40°C to +125°C

Maximum Junction Temperature, TJ ............................. 150°C

ESD protection on all pins

4kV

*Notice: Stresses above those listed under “Maximum rat-

ings” 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

operational listings of this specification is not implied. Expo-

sure to maximum rating conditions for extended periods may

affect device reliability.

PIN FUNCTION TABLE

Name

Function

VIN

Analog Input

Analog Output

SCLK

Serial Clock Input

SDA

Serial Data In/Out (Open Drain)

GND

Ground

FAULT

Digital (Open Drain) Output

SENSE2

Analog Input

SENSE1

Analog Input

VOUT

Digital Output

VDD

Power Supply Input

ELECTRICAL SPECIFICATIONS

Electrical Characteristics: Unless otherwise noted, all limits are specified for VDD = 3.0V to 5.5V,

-40°C <TA < +85°C.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Supply Voltage

VDD

3.0

—

5.5

Operating Supply Current

IDD

—

150

300

µA

Pins 7, 8, 9 Open

Shutdown Mode Supply Current

IDDSHDN

—

µA

Pins 7, 8, 9 Open

VOUT PWM Output

VOUT Rise Time

—

µsec

IOH = 5 mA, Note 1

VOUT Fall Time

—

µsec

IOL = 1 mA, Note 1

Sink Current at VOUT Output

IOL

1.0

—

VOL = 10% of VDD

Source Current at VOUT Output

IOH

5.0

—

VOH = 80% of VDD

PWM Frequency

CF = 1 µF

VIN Input

VIN Input Voltage for 100% PWM

duty-cycle

VC(MAX)

2.45

2.6

2.75

VC(MAX) - VC(MIN)

VCRANGE

1.25

1.4

1.55

VIN Input Resistance

—

10M

—



VDD = 5.0V

VIN Input Leakage Current

IIN

-1.0

—

+1.0

µA

SENSE Input

SENSE Input Threshold Voltage with

Respect to GND

VTHSENSE

100

120

FAULT Output

FAULT Output LOW Voltage

VOL

——

0.3

IOL = 2.5 mA

FAULT Output Response Time

tFAULT

—2.4

—

sec

Fan RPM-to-Digital Output

Fan RPM ERROR

-15

—

+15

RPM > 1600

Note 1: Not production tested, ensured by design, tested during characterization.

2: For 5.0V > VDD  5.5V, the limit for VIH = 2.2V.

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