MAX821 datasheet(3/8 Pages) MAXIM

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4-Pin µP Voltage Monitors with Pin-Selectable

Power-On Reset Timeout Delay

_______________________________________________________________________________________

Note 1: RESET output for MAX821; RESET output for MAX822.

Note 2: During reset active timeout period only.

Note 3: Guaranteed by design.

ELECTRICAL CHARACTERISTICS (continued)

(VCC = full range, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.)

0.3

0.4

SRT Input Capacitance

(Note 3) (see Setting

the Reset Timeout Delay

section)

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

MAX821R/S/T/U only, ISINK = 1.2mA,

VCC = VTH(MIN)

MAX821L/M/P only, ISINK = 3.2mA,

VCC = VTH(MIN)

Internal

CONDITIONS

0.3

VOL

0.3

ISINK = 50µA

0.3

0.4

MAX822R/S/T only, ISINK = 1.2mA,

VCC = VTH(MAX)

MAX822L/M only, ISINK = 3.2mA,

VCC = VTH(MAX)

0.8VCC

VOH

RESET Output Voltage

(MAX821)

VCC -1.5

MAX821R/S/T/U only, ISOURCE = 500µA,

VCC ≥ VTH(MAX)

MAX821L/M/P only, ISOURCE = 800µA,

VCC ≥ VTH(MAX)

0.6

-40

RESET TIMEOUT PERIOD

vs. TEMPERATURE

0.7

TEMPERATURE (°C)

0.9

0.8

-20

100

1.0

SRT = GND

-40

RESET TIMEOUT PERIOD

vs. TEMPERATURE

TEMPERATURE (°C)

-20

100

SRT = VCC

150

-40

RESET TIMEOUT PERIOD

vs. TEMPERATURE

160

155

TEMPERATURE (°C)

175

170

165

-20

100

180

SRT = UNCONNECTED

VOL

VOH

RESET Output Voltage

(MAX822)

0.8VCC

ISOURCE = 150µA, 1.4V ≤ VCC ≤ VTH(MIN)

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

TA = 0°C to +70°C,

VCC ≥ 1V

TA = -40°C to +85°C,

VCC ≥ 1.2V

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