MAX6751KA26 datasheet(3/14 Pages) MAXIM

Part #	MAX6751KA26

Description	UP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay

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Manufacturer	MAXIM [Maxim Integrated Products]

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µP Reset Circuits with Capacitor-Adjustable

Reset/Watchdog Timeout Delay

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +1.2V to +5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CSWT = 1500pF

11.38

15.18

18.98

Fast Watchdog Timeout Period,

SET Ratio = 64,

(MAX6752/MAX6753)

tWD1

CSWT = 100pF

1.01

ms

Fast Watchdog Minimum Period

(MAX6752/MAX6753)

2000

ns

SWT Ramp Current

IRAMP

VSWT = 0 to 1.23V, VCC = 1.6V to 5V

200

250

300

nA

SWT Ramp Threshold

VRAMP

VCC = 1.6V to 5V (VRAMP rising)

1.173

1.235

1.297

V

VCC

≥ 1.0V, ISINK = 50µA

0.3

VCC

≥ 2.7V, ISINK = 1.2mA

0.3

RESET Output Voltage LOW

Open-Drain, Push-Pull

(Asserted)

VOL

VCC

≥ 4.5V, ISINK = 3.2mA

0.4

V

VCC

≥ 1.8V, ISOURCE = 200µA

0.8 x VCC

VCC

≥ 2.25V, ISOURCE = 500µA

0.8 x VCC

RESET Output Voltage HIGH,

Push-Pull (Not Asserted)

VOH

VCC

≥ 4.5V, ISOURCE = 800µA

0.8 x VCC

V

RESET Output Leakage Current,

Open Drain

ILKG

VCC > VTH, reset not asserted,

VRESET = 5.5V

1.0

µA

DIGITAL INPUTS (MR, SET0, SET1, WDI, WDS)

VIL

0.8

VIH

VCC

≥ 4.0V

2.4

VIL

VCC < 4.0V

0.3 x VCC

Input Logic Levels

VIH

0.7 x VCC

V

MR Minimum Pulse Width

1µs

MR Glitch Rejection

100

ns

MR to RESET Delay

200

ns

MR Pullup Resistance

Pullup to VCC

12

20

28

k

Ω

WDI Minimum Pulse Width

300

ns

RESET IN

RESET IN Threshold

VRESET IN

TA = -40°C to +125°C

1.216

1.235

1.254

V

RESET IN Leakage Current

IRESET IN

-50

±1

+50

nA

RESET IN to RESET Delay

RESET IN falling at 1mV/µs

20

µs

Note 1: Production testing done at TA = +25°C. Over temperature limits are guaranteed by design.

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