MAX6445UK29L datasheet(3/13 Pages) MAXIM

Part #	MAX6445UK29L

Description	uP Reset Circuits with Long Manual Reset Setup Period

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Manufacturer	MAXIM [Maxim Integrated Products]

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µP Reset Circuits with Long Manual Reset

Setup Period

_______________________________________________________________________________________

3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MR2 Minimum Setup Period

Pulse Width

MAX6447/MAX6448/MAX6451/MAX6452

1

µs

MR2 Glitch Rejection

MAX6447/MAX6448/MAX6451/MAX6452

100

ns

MR2 to RESET Delay

MAX6447/MAX6448/MAX6451/MAX6452

200

ns

Manual Reset Timeout Period

tMRP

140

210

280

ms

MR1 to VCC Pullup Impedance

25

50

75

k

Ω

MR2 to VCC Pullup Impedance

MAX6445/MAX6446/MAX6449/MAX6450

25

50

75

k

Ω

VCC

≥ 1.00V, ISINK = 50µA, RESET asserted

0.3

VCC

≥ 1.20V, ISINK = 100µA, RESET

asserted

0.3

VCC

≥ 2.55V, ISINK = 1.2mA, RESET

asserted

0.3

RESET Output Low

(Open Drain or Push-Pull)

VOL

VCC

≥ 4.25V, ISINK = 3.2mA, RESET

asserted

0.4

V

VCC

≥ 1.80V, ISOURCE = 200µA, RESET

deasserted

0.8

× VCC

VCC

≥ 3.15V, ISOURCE = 500µA, RESET

deasserted

0.8

× VCC

RESET Output High

(Push-Pull)

VOH

VCC

≥ 4.75V, ISOURCE = 800µA, RESET

deasserted

0.8

× VCC

V

RESET Open-Drain Leakage

Current

ILKG

RESET deasserted

1

µA

MR1, MR2, MR2

Input Low Voltage

VIL

0.3

× VCC

V

MR1, MR2, MR2

Input High Voltage

VIH

0.7

× VCC

V

Note 1: Devices production tested at TA = +25°C. Overtemperature limits are guaranteed by design.

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 1.0V to 5.5V, TA = -40°C to +85°C, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)

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