MAX801MESA datasheet(3/12 Pages) MAXIM

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8-Pin µP Supervisory Circuits

with ±1.5% Reset Accuracy

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ELECTRICAL CHARACTERISTICS (continued)

(VCC = 4.6V to 5.5V for the MAX80_L, VCC = 4.5V to 5.5V for the MAX80_N, VCC = 4.35V to 5.5V for the MAX80_M; VBATT = 2.8V;

TA = TMIN to TMAX. Typical values are at VCC = 5V and TA = +25°C, unless otherwise noted.)

VCC rising

and falling

VCC rising

VCC falling at 1mV/µs

ISINK = 50µA,

VBATT = 0V,

VCC falling

VCC falling at 1mV/µs

MAX80_M

VCC falling

MAX80_L

MAX80_N

CONDITIONS

0.1

0.4

RESET Output Voltage

0.3

4.350

4.425

4.500

VRST

Reset Threshold

140

200

280

tRP

RESET Active Timeout

Period

µs

tLL

VCC to LOWLINE Delay

µs

tRD

VCC to RESET Delay

4.48

4.56

VLL

LOWLINE Threshold,

VCC Rising

Reset-Threshold Hysteresis

VLR

LOWLINE to RESET

Threshold Voltage

4.73

4.81

4.63

4.71

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

MAX80_L

MAX80_N

4.500

4.575

4.650

4.600

4.675

4.750

MAX80_M

ISOURCE = 0.1mA

VCC - 1.5

VCC - 0.1

ISINK = 3.2mA

ISOURCE = 5mA, VCC = 4.25V

0.4

VCC - 1.5

RESET Output Voltage

(MAX801)

Output sink current

Output source current, VCC = 4.25V

ISINK = 3.2mA, VCC = 4.25V

ISOURCE = 5mA, VCC = 4.25V

0.4

VCC - 1.5

LOWLINE Output Voltage

ISC

RESET Output Short-

Circuit Current (MAX801)

Output sink current, VCC = 4.25V

Output source current

ISC

LOWLINE Output

Short-Circuit Current

VCC = 1.0V, MAX80_C

VCC = 1.2V, MAX80_E/M

ISINK = 3.2mA, VCC = 4.25V

Output sink current, VCC = 4.25V

Output source current

1.6

ISC

RESET Output

Short-Circuit Current

1.12

1.6

2.24

sec

0.75 x VCC

tWD

Watchdog Timeout Period

VIH

RESET deasserted, WDI = 0V

0.8

-50

-10

VIL

WDI Threshold Voltage

(Note 4)

µA

RESET deasserted, WDI = VCC

WDI Input Current

VIL = 0.8V, VIH = 0.75V x VCC

100

Minimum Watchdog Input

Pulse Width

RESET AND LOW-LINE

WATCHDOG TIMER (MAX801)

MAX801MESA Datasheet(PDF) 3 Page - Maxim Integrated Products

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