MAX6730 datasheet(4/15 Pages) MAXIM

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Single-/Dual-/Triple-Voltage µP Supervisory

Circuits with Independent Watchdog Output

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC1 = VCC2 = +0.8V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

WATCHDOG INPUT

tWD-L

First watchdog period after reset

timeout period

Watchdog Timeout Period

tWD-S

Normal mode

1.12

1.68

2.24

WDI Pulse Width

tWDI

(Note 2)

VIL

0.3

× VCC1

WDI Input Voltage

VIH

0.7

× VCC1

WDI Input Current

IWDI

VWDI = 0V or VCC1-1

µA

RESET/WATCHDOG OUTPUT

VCC1 or VCC2

≥ +0.8V,

ISINK = 1µA, output asserted

0.3

VCC1 or VCC2

≥ +1.0V,

ISINK = 50µA, output asserted

0.3

VCC1 or VCC2

≥ +1.2V,

ISINK = 100µA, output asserted

0.3

VCC1 or VCC2

≥ +2.7V,

ISINK = 1.2mA, output asserted

0.3

RST / WDO Output Low Voltage

(Push-Pull or Open Drain)

VOL

VCC1 or VCC2

≥ +4.5V,

ISINK = 3.2mA, output asserted

0.4

VCC1

≥ +1.8V, ISOURCE = 200µA,

output not asserted

0.8

× VCC1

VCC1

≥ +2.7V, ISOURCE = 500µA,

output not asserted

0.8

× VCC1

RST / WDO Output High Voltage

(Push-Pull Only)

VOH

VCC1

≥ +4.5V, ISOURCE = 800µA,

output not asserted

0.8

× VCC1

RST / WDO Output Open-Drain

Leakage Current

Output not asserted

0.5

µA

Note 1: Devices tested at TA = +25°C. Overtemperature limits are guaranteed by design and not production tested.

Note 2: Parameter guaranteed by design.

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