MAX802LCSA datasheet(3/12 Pages) MAXIM

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Microprocessor Supervisory Circuits

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PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

RESET Output Voltage

MAX805LC, ISOURCE = 4µA, VCC = 1.1V

0.8

MAX805LE/M, ISOURCE = 4µA, VCC = 1.2V

0.9

MAX805L, ISOURCE = 800µA

VCC - 1.5

MAX805L, ISINK = 3.2mA

0.4

Watchdog Timeout

tWD

1.00

1.60

2.25

sec

PFO

Output Voltage

ISOURCE = 800µA

VCC - 1.5

ISINK = 3.2mA

0.4

Note 2: Either VCC or VBATT can go to 0V, if the other is greater than 2.0V.

Note 3: "-" = battery-charging current, "+" = battery-discharging current.

Note 4: WDI is guaranteed to be in an intermediate, non-logic level state if WDI is floating and VCC is in the operating voltage range.

WDI is internally biased to 35% of VCC with an input impedance of 50kΩ.

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 4.75V to 5.5V for MAX690A/MAX802L/MAX805L, VCC = 4.5V to 5.5V for MAX692A/MAX802M, VBATT = 2.8V,

TA = TMIN to TMAX, unless otherwise noted.)

WDI = 0V

-150

-50

WDI Input Current

WDI = VCC

150

3.5

µA

WDI Input Threshold (Note 4)

VCC = 5V

0.8

WDI Pulse Width

tWP

VIL = 0.4V, VIH = (0.8) (VCC)

Logic low

Logic high

MAX69_A, MAX805L, VCC = 5V

1.20

1.25

1.30

PFI Input Threshold

MAX802_C/E, VCC = 5V

1.225

1.250

1.275

PFI Input Current

-25

0.01

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