MAX690A(1993) 查看數據表（PDF） - Maxim Integrated

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MAX690A
(Rev.:1993)

Microprocessor Supervisory Circuits

Maxim Integrated 

Microprocessor Supervisory Circuits

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.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

RESET Output Voltage

Watchdog Timeout

WDI Pulse Width

WDI Input Threshold (Note 4)

MAX805LC, ISOURCE = 4µA, VCC = 1.1V

0.8

MAX805LE/M, ISOURCE = 4µA, VCC = 1.2V

0.9

MAX805L, ISOURCE = 800µA

VCC - 1.5

V

MAX805L, ISINK = 3.2mA

0.4

tWD

1.00 1.60 2.25 sec

tWP

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

50

ns

Logic low

VCC = 5V

Logic high

3.5

0.8

V

WDI Input Current

WDI = VCC

WDI = 0V

50

150

µA

-150 -50

PFI Input Threshold

PFI Input Current

MAX69_A, MAX805L, VCC = 5V

MAX802_C/E, VCC = 5V

1.20 1.25 1.30

V

1.225 1.250 1.275

-25 0.01

25

nA

PFO Output Voltage

ISOURCE = 800µA

ISINK = 3.2mA

VCC - 1.5

V

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.

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