MAX823TEUK datasheet(3/8 Pages) MAXIM

Part #	MAX823TEUK

Description	5-Pin Microprocessor Supervisory Circuits

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Manufacturer	MAXIM [Maxim Integrated Products]

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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, TA = TMIN to TMAX, unless otherwise noted. Typical values are at

TA = +25°C.) (Note 1)

Note 1: Over-temperature limits are guaranteed by design and not production tested.

Note 2: The RESET short-circuit current is the maximum pull-up current when RESET is driven low by a µP bidirectional reset pin.

Note 3: WDI is internally serviced within the watchdog period if WDI is left unconnected.

Note 4: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is

designed to drive a three-stated-output device with a 10µA maximum leakage current and a maximum capacitive load of

200pF. This output device must be able to source and sink at least 200µA when active.

5-Pin Microprocessor Supervisory Circuits

_______________________________________________________________________________________

3

VRST - VCC = 100mV

MAX824T/S/R, MAX825T/S/R,

VCC = VRST max, ISINK = 1.2mA

MAX82_L/M, VCC = VRST max,

ISOURCE = 120µA

MAX824L/M, MAX825L/M,

VCC = VRST max, ISINK = 3.2mA

VCC > 1.8V, ISOURCE = 150µA

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

CONDITIONS

µs

20

VCC to RESET Delay

V

0.3

VOL

RESET Output Voltage

VCC - 1.5

0.4

0.8VCC

VOH

800

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

MAX82_T/S/R, VCC = VRST max,

ISOURCE = 30µA

0.8VCC

VOH

MAX82_T/S/R, VCC = VRST min,

ISINK = 1.2mA

MAX82_L/M, VCC = VRST min,

ISINK = 3.2mA

0.3

0.4

TA = -40°C to +85°C, VCC = 1.2V,

VCC falling, VBATT = 0V, ISINK = 100µA

TA = 0°C to +70°C, VCC = 1V,

VCC falling, ISINK = 50µA

V

0.3

VOL

RESET Output Voltage

0.3

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

µA

400

ISOURCE

RESET Output Short-Circuit

Current (Note 2)

VIL = 0.4V, VIH = 0.8VCC

ns

50

tWDI

WDI Pulse Width

sec

1.12

1.60

2.40

tWD

Watchdog Timeout Period

WDI = 0V, time average

WDI = VCC, time average

VCC = 5V

µA

-20

-15

WDI Input Current (Note 4)

120

160

V

0.7VCC

VIH

WDI Input Threshold (Note 3)

0.3VCC

VIL

µs

1.0

MR Pulse Width

V

0.7VCC

VIH

MR Input Threshold

0.3VCC

VIL

k

Ω

35

52

75

MR Pull-Up Resistance (internal)

ns

500

MR to Reset Delay

ns

100

MR Noise Immunity (pulse width

with no reset)

MANUAL-RESET INPUT (MAX823/MAX825)

WATCHDOG INPUT (MAX823/MAX824)

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