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MAX6322HPUK35DY-T

5-Pin µP Supervisory Circuits with Watchdog and Manual Reset

Maxim Integrated 

5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

BIDIRECTIONAL RESET OUTPUT (MAX6316M/MAX6318MH/MAX6319MH)

Transition Flip-Flop Setup Time

tS

RESET Output Rise Time

(Note 4)

tR

Active Pull-Up Enable Threshold

RESET Active Pull-Up Current

RESET Pull-Up Resistance

VPTH

(Note 3)

VCC = 3.0V, CL = 120pF

VCC = 5.0V, CL = 200pF

VCC = 3.0V, CL = 250pF

VCC = 5.0V, CL = 400pF

VCC = 5.0V

VCC = 5.0V

OPEN-DRAIN RESET OUTPUT (MAX6320P/MAX6321HP/MAX6322HP)

VCC ≥ 1.0V, ISINK = 50µA

RESET Output Voltage

VOL

VCC ≥ 1.2V, ISINK = 100µA

VCC ≥ 2.7V, ISINK = 1.2mA

VCC ≥ 4.5V, ISINK = 3.2mA

Open-Drain Reset Output

Leakage Current

ILKG

MIN TYP MAX UNITS

400

ns

333

333

ns

666

666

0.4 0.65

V

20

mA

4.2

4.7

5.2

kΩ

0.3

0.3

V

0.3

0.4

1.0

µA

WATCHDOG INPUT (MAX6316/MAX6317H/MAX6318_H/MAX6320P/MAX6321HP)

MAX63_ _ _ W-T

Watchdog Timeout Period

MAX63_ _ _ X-T

tWD

MAX63_ _ _ Y-T

MAX63_ _ _ Z-T

WDI Pulse Width

tWDI VIL = 0.3 x VCC, VIH = 0.7 x VCC

WDI Input Threshold

VIL

(Note 5)

VIH

WDI Input Current

(Note 6)

IWDI

WDI = VCC, time average

VWDI = 0, time average

MANUAL-RESET INPUT (MAX6316_/MAX6317H/MAX6319_H/MAX6320P/MAX6322HP)

MR Input Threshold

MR Input Pulse Width

MR Glitch Rejection

VIL

VIH

VTH > 4.0V

VIL

VTH < 4.0V

VIH

MR Pull-Up Resistance

MR to Reset Delay

VCC = 5V

4.3

6.3

9.3

ms

71

102

153

1.12

1.6

2.4

sec

17.9 25.6 38.4

50

ns

0.3 x VCC

V

0.7 x VCC

120

160

µA

-20

-15

0.8

0.3 x VCC

2.0

V

0.7 x VCC

1

µs

100

ns

35

52

75

kΩ

230

ns

Note 3: This is the minimum time RESET must be held low by an external pull-down source to set the active pull-up flip-flop.

Note 4: Measured from RESET VOL to (0.8 x VCC), RLOAD = ∞.

Note 5: WDI is internally serviced within the watchdog period if WDI is left unconnected.

Note 6: 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 for a three-stated-output device with a 10µA maximum leakage current and capable of driving a maximum capaci-

tive load of 200pF. The three-state device must be able to source and sink at least 200µA when active.

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