MAX6371KA datasheet(2/10 Pages) MAXIM

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Pin-Selectable Watchdog Timers

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = +2.5V to +5.5V, SET_ = VCC or GND, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C and

VCC = +3V.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Terminal Voltage (with respect to GND)

VCC .....................................................................-0.3V to +6V

WDI.....................................................................-0.3V to +6V

WDO (Open Drain: MAX6369/71/73) .................-0.3V to +6V

WDO (Push-Pull: MAX6370/72/74 .......-0.3V to (VCC + 0.3V)

SET0, SET1, SET2 ................................-0.3V to (VCC + 0.3V)

Maximum Current, Any Pin (input/output)...........................20mA

Continuous Power Dissipation (TA = +70°C)

8-Pin SOT23 (derate 8.75mW/°C above +70°C).........700mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature ......................................................+150°C

VCC Rise or Fall Rate......................................................0.05V/µs

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow)

Lead(Pb)-free...................................................................+260°C

Containing Lead (Pb).......................................................+240°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range

VCC

2.5

5.5

TA = -40°C to +85°C8

Supply Current

ICC

No load

TA = -40°C to +125°C10

µA

Input High Voltage

VIH

WDI, SET0, SET1, SET2

0.8

×VCC

VCC

≥ 3.3V,

TA = -40°C to +85°C

0.8

VCC

≥ 3.3V,

TA = -40°C to +125°C

0.6

VCC

≥ 2.5V,

TA = -40°C to +85°C

0.6

Input Low Voltage

VIL

WDI, SET0,

SET1, SET2

VCC

≥ 2.5V,

TA = -40°C to +125°C

0.4

Logic Input Current (Note 2)

VWDI or VSET_ = 0V or VCC

±10

ISINK = 1.2mA, VCC > 2.7V, watchdog

output asserted

0.3

WDO Output Low

Voltage

VOL

ISINK = 6mA, VCC > 4.5V, watchdog

output asserted

0.4

WDO Leakage Current

ILKG

VWDO = 0 to +5.5V, output deasserted,

MAX6369/MAX6371/MAX6373

1µA

ISOURCE = 500µA, VCC > 2.7V, watchdog

output deasserted

0.8

×VCC

WDO Output High

Voltage

VOH

ISOURCE = 800µA, VCC > 4.5V, watchdog

output deasserted

VCC -1.5

Maxim Integrated

MAX6369–MAX6374

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