MAX823S datasheet(3/10 Pages) MAXIM

Part #	MAX823S

Description	5-Pin Microprocessor Supervisory Circuits With Watchdog Timer and Manual Reset

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Manufacturer	MAXIM [Maxim Integrated Products]

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5-Pin Microprocessor Supervisory Circuits With

Watchdog Timer and Manual Reset

_______________________________________________________________________________________

3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX82_L/M

10

Reset Threshold Hysteresis

MAX82_T/S/R/Z/Y

5

mV

Reset Threshold Temperature

Coefficient

40

ppm/

°C

Reset Timeout Period

tRP

140

200

280

ms

VCC to RESET Delay

VRST - VCC = 100mV

20

µs

MAX82_L/M, VCC = VRST max,

ISOURCE = 120

µA

VCC - 1.5

VOH

MAX82_T/S/R/Z/Y, VCC = VRST max,

ISOURCE = 30

µA

0.8

✕ VCC

MAX82_L/M, VCC = VRST min,

ISINK = 3.2mA

0.4

MAX82_T/S/R/Z/Y VCC = VRST min,

ISINK = 1.2mA

0.3

TA = 0

°C to +70°C, VCC = 1V,

VCC falling, ISINK = 50

µA

0.3

RESET Output Voltage

VOL

TA = TMIN to TMAX, VCC = 1.2V,

VCC falling, VBATT = 0V, ISINK = 100

µA

V

MAX82_L/M, RESET = 0V, VCC = 5.5V

800

RESET Output Short-Circuit

Current (Note 2)

ISOURCE

MAX82_T/S/R/Z/Y, RESET = 0V, VCC = 3.6V

400

µA

VOH

VCC > 1.8V, ISOURCE = 150

µA

0.8

✕ VCC

MAX824L/M, MAX825L/M,

VCC = VRST max, ISINK = 3.2mA

0.4

RESET Output Voltage

VOL

MAX824T/S/R/Z/Y, MAX825T/S/R/Z/Y,

VCC = VRST max, ISINK = 1.2mA

0.3

V

WATCHDOG INPUT (MAX823/MAX824)

Watchdog Timeout Period

tWD

1.12

1.60

2.40

s

WDI Pulse Width

tWDI

VIL = 0.4V, VIH = 0.8 ✕ VCC

50

ns

VIL

0.3

✕ VCC

WDI Input Voltage (Note 3)

VIH

0.7

✕ VCC

V

WDI = VCC, time average

120

160

WDI Input Current (Note 4)

WDI = 0, time average

-20

-15

µA

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +4.75V to +5.5V for MAX82_L, VCC = +4.5V to +5.5V for MAX82_M, VCC = +3.15V to +3.6V for MAX82_T, VCC = +3V

to +3.6V for MAX82_S, VCC = +2.7V to +3.6V for MAX82_R, VCC = +2.38V to +2.75V for MAX82_Z, VCC = +2.25V to +2.75V for

MAX82_Y, TA = TMIN to TMAX, TA = -40

°C to +85°C (SC70), TA = -40°C to +125°C (SOT23), unless otherwise noted. Typical values

are at TA = +25

°C.) (Note 1)

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