TC670_13 datasheet(2/14 Pages) MICROCHIP

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TC670

DS21688D-page 2

 2001-2012 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

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

All Inputs and Outputs. ............ (GND

0.3V) to (V

DD + 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

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

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

DC CHARACTERISTICS

Symbol

Description

THRESHOLD

Analog Input

GND

Ground Terminal

CLEAR

Digital Input

VDD

Bias Supply Input

ALERT

Digital (Open-Drain) Output

SENSE

Analog Input

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

VDD

3.0

—

5.5

Supply Current

IDD

—90

150

µA

CLEAR Input

Logic Input High Level

VIH

0.8VDD

——

Logic Input Low Level

VIL

——

0.2VDD

SENSE Input

Input Level Threshold Voltage

VTH(SENSE)

—124

—

Input Resistance

RSENSE

—50

—



THRESHOLD Input

Input Voltage Minimum

—

0.0

—

Input Voltage Maximum

—

2.4

—

Input Resistance

—

100

—



Programmed Fan Speed Alert Accuracy

(Note 1)

ALERTACC

-10

—

+10

VDD = 3.0V

ALERT Output

Output Low Voltage

VLOW

——

0.3

VISINK = 2.5 mA

Output Delay Time

tDELAY

—176

—

Temperature Ranges

Specified Temperature Range

-40

—

+85

°C

Operating Temperature Range

-40

—

+125

°C

Thermal Package Resistances

Thermal Resistance, 6L-SOT-23



—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”.

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