MAX6750 datasheet(4/14 Pages) MAXIM

Part #	MAX6750

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

4

_______________________________________________________________________________________

Typical Operating Characteristics

(VCC = +5V, TA = +25°C, unless otherwise noted.)

RESET TIMEOUT PERIOD vs. CSRT

CSRT (pF)

10,000

1000

1

10

100

1000

0.1

100

100,000

WATCHDOG TIMEOUT PERIOD vs. CSWT

CSWT (pF)

10,000

1000

1

10

100

1000

10,000

100,000

0.1

100

100,000

MAX6746–MAX6751

EXTENDED MODE

NORMAL MODE

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5

4

3

2

1

3

4

5

6

0

16

NORMALIZED RESET TIMEOUT PERIOD

vs. TEMPERATURE

TEMPERATURE (

°C)

100

75

50

25

0

-25

0.95

1.00

1.05

1.10

1.15

1.20

0.90

-50

125

CSRT = 100pF

CSRT = 1500pF

NORMALIZED WATCHDOG TIMEOUT PERIOD

vs. TEMPERATURE

TEMPERATURE (

°C)

100

75

50

25

0

-25

0.95

0.90

0.85

1.00

1.05

1.10

1.15

1.20

0.80

-50

125

CSWT = 100pF

CSWT = 1500pF

MAXIMUM TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

RESET THRESHOLD OVERDRIVE (mV)

800

600

400

200

25

50

75

100

125

150

175

0

01000

RESET OCCURS

ABOVE THE CURVE

VTH = 2.92V

SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

100

75

25

50

0

-25

1

2

3

4

5

6

0

-50

125

VCC = 3.3V

VCC = 1.8V

VCC = 5V

NORMALIZED RESET IN THRESHOLD VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

100

75

50

25

0

-25

0.994

0.992

0.996

1.000

0.998

1.004

1.002

1.008

1.006

1.010

0.990

-50

125

VCC = 5V

RESET IN THRESHOLD

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5

4

3

2

1.236

1.237

1.238

1.239

1.240

1.235

16

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