TC670 查看數據表（PDF） - Microchip Technology

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TC670

Tiny Predictive Fan Failure Detector

Microchip Technology 

TC670

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

VDD...................................................................................6.0V

All Inputs and Outputs. ............ (GND − 0.3V) to (VDD + 0.3V)

Output Short-Circuit Current .................................continuous

Current at Input Pin ................................................... +/-2 mA

Current at Output Pin .............................................. +/-25 mA

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

ESD protection on all pins ..................................................≥ 4 kV

Operating Temperature Range........................-40°C to +85°C

Storage Temperature Range.........................-55°C to +150°C

† 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.

TABLE 1-1: PIN FUNCTION TABLE

Symbol

Description

THRESHOLD Analog Input

GND

Ground Terminal

CLEAR

Digital Input

VDD

Bias Supply Input

ALERT

Digital (Open-Drain) Output

SENSE

Analog Input

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits are specified at +25°C, VDD = 3.0V to 5.5V,

CLEAR = Low. Boldface type specifications apply for temperature range of -40°C to +85°C.

Parameters

Sym

Min Typ Max Units

Conditions

Power Supply

Supply Voltage

Supply Current

CLEAR Input

VDD

3.0

—

5.5

V

IDD

—

90

150

µA

Logic Input High Level

Logic Input Low Level

SENSE Input

VIH

0.8VDD —

—

V

VIL

—

— 0.2VDD V

Input Level Threshold Voltage

Input Resistance

THRESHOLD Input

VTH(SENSE)

—

124

—

mV

RSENSE

—

50

—

kΩ

Input Voltage Minimum

—

0.0

—

V

Input Voltage Maximum

—

2.4

—

V

Input Resistance

—

100

—

MΩ

Programmed Fan Speed Alert Accuracy ALERTACC -10

—

+10

% VDD = 3.0V

(Note 1)

ALERT Output

Output Low Voltage

Output Delay Time

Temperature Ranges

VLOW

tDELAY

—

—

0.3

V ISINK = 2.5 mA

—

176

—

ms

Specified Temperature Range

Operating Temperature Range

Thermal Package Resistances

TA

-40

—

+85

°C

TA

-40

— +125 °C

Thermal Resistance, 6L-SOT-23

θJA

—

230

— °C/W

Note 1: The TC670 will operate properly over the entire power supply range of 3.0V to 5.5V. As VDD varies from

3.0V, accuracy will degrade based on the percentage of VDD, as shown in Section 2.0, “Typical

Performance Curves”.

DS21688C-page 2

 2003 Microchip Technology Inc.

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