MAX6443_10 datasheet(4/13 Pages) MAXIM

Part #	MAX6443

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

4

_______________________________________________________________________________________

Typical Operating Characteristics

(VCC = 3.3V, TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

3.5 4.0

2.0 2.5 3.0

1.5

1

2

3

4

5

6

7

8

9

0

1.0

5.5

TA = +25

°C

TA = -40

°C

TA = +85

°C

NORMALIZED RESET TIMEOUT PERIOD

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

0.96

0.97

0.98

0.99

1.00

1.01

1.02

1.03

1.04

1.05

0.95

-40

85

MAXIMUM TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

RESET THRESHOLD OVERDRIVE (mV)

800

600

400

200

50

100

150

200

250

0

1000

VTH = 4.4V

RESET OCCURS

ABOVE THE CURVE

NORMALIZED VCC RESET THRESHOLD

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

0.98

0.99

1.00

1.01

1.02

1.03

0.97

-40

85

VCC TO RESET DELAY

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

20.4

20.8

21.2

21.6

22.0

22.4

22.8

23.2

23.6

24.0

20.0

-40

85

VCC = FALLING AT 1mV/

µs

RSTIN TO RESET DELAY

vs. TEMPERATURE (RSTIN FALLING)

TEMPERATURE (

°C)

60

35

10

-15

20.4

20.8

21.2

21.6

22.0

22.4

22.8

23.2

23.6

24.0

20.0

-40

85

RSTIN FALLING AT 1mV/

µs

MANUAL RESET TO RESET DELAY

(MAX6445L/MAX6446L/MAX6449L/MAX6450L)

MAX6443/52 toc07

TIME (1s/div)

MR1

(5V/div)

MR2

(5V/div)

RESET

(5V/div)

VCC = 5V

VCC TO RESET DELAY

MAX6443/52 toc08

TIME (100

µs/div)

VCC (100mV/div)

RESET

(2V/div)

VCC = 4.5V

VCC = 4.3V

VTH = 4.392V

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