Low-Cost, Power-On Reset

and Watchdog Controllers

2

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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.

Input Voltage (with respect to GND)

Operating Temperature Range

C Suffix………………………………………………0°C to +70°C

E Suffix ......……………………………………….-40°C to +85°C

8-Pin PDIP (derated 5mW/°C above +70°C).....………400mW

16-Pin SO (derated 7mW/°C above +70°C) ................600mW

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

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

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range

3.0

5.5

V

Supply Current

5mA

Power-Up Reset Deassertion

4.50

4.65

4.75

V

Power-Up Reset Assertion

4.4

V

Hysteresis

40

mV

Reset Output Pulse Width

140

500

ms

Output low

0.4

RESET OUTPUT (Open Drain)

Output high

3.5

V

Output low

0.4

RESET OUTPUT (SO Package

Only)

Output high

3.5

V

Output low

0.4

WDO Output (MAX699 SO

Package Only)

Output high

3.5

V

MAX699 Watchdog Timeout

Period

1.00

1.6

2.25

s

MAX699 Minimum WDI Input

Pulse Width

200

ns

Locic-low

0.8

MAX699 WDI Input Threshold

Logic-high

3.8

V

20

50

MAX699 WDI Input Current

WDI = 0V

-50

-15

µA