MAX6443US datasheet(2/13 Pages) MAXIM

2 / 13 page

µP Reset Circuits with Long Manual Reset

Setup Period

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ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

All Voltages Referenced to GND

VCC ..........................................................................-0.3V to +6V

Open-Drain RESET ..................................................-0.3V to +6V

Push-Pull RESET ........................................-0.3V to (VCC + 0.3V)

MR1, MR2, MR2, RSTIN ..........................................-0.3V to +6V

Input Current, All Pins.......................................................±20mA

Continuous Power Dissipation (TA = +70°C)

4-Pin SOT143 (derate 4.0mW/°C above +70°C)...........320mW

5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW

6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW

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

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow)

Lead(Pb)-free……………………………………………..+260°C

Containing lead………………………………………… +240°C

ELECTRICAL CHARACTERISTICS

(VCC = 1.0V to 5.5V, TA = -40°C to +85°C, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range

VCC

1.0

5.5

VCC = 5.5V, no load

VCC Supply Current

ICC

VCC = 3.6V, no load

µA

4.50

4.63

4.75

4.25

4.38

4.50

3.00

3.08

3.15

2.85

2.93

3.00

2.55

2.63

2.70

2.25

2.32

2.38

2.12

2.19

2.25

1.62

1.67

1.71

VCC Reset Threshold

VTH

1.52

1.58

1.62

Reset Threshold Tempco

ppm/°C

Reset Threshold Hysteresis

× VTH

TA = 0°C to +85°C

0.615

0.630

0.645

RSTIN Threshold

VTH-RSTIN

MAX6449–MAX6452

TA = -40°C to +85°C

0.610

0.650

RSTIN Threshold Hysteresis

VHYST

MAX6449–MAX6452

2.5

RSTIN Input Current

IRSTIN

MAX6449–MAX6452

-25

+25

RSTIN to Reset Output Delay

MAX6449–MAX6452, VRSTIN falling at

1mV/µs

µs

Reset Timeout Period

tRP

140

210

280

VCC to RESET Output Delay

tRD

VCC falling at 1mV/µs

µs

6.72

10.08

13.44

4.48

6.72

8.96

2.24

3.36

4.48

Manual Reset Minimum Setup

Period Pulse Width

tMR

1.12

1.68

2.24

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