X5643, X5645 (Replaces X25643, X25645)

FN8135 Rev 1.00

Page 16 of 19

July 18, 2005

TYPICAL PERFORMANCE

18

16

14

12

10

8

6

4

2

0

Watchdog Timer On (VCC = 5V)

Watchdog Timer On (VCC = 5V)

Watchdog Timer Off (VCC = 3V, 5V)

-40

25

90

Temp (°C)

VCC Supply Current vs. Temperature (ISB)tWDO vs. Voltage/Temperature (WD1, 0 = 1, 1)

VTRIP vs. Temperature (programmed at 25°C)

tWDO vs. Voltage/Temperature (WD1, 0 = 1, 0)

tPURST vs. Temperature

tWDO vs. Voltage/Temperature (WD1, 0 0 = 0, 1)

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1

1.7

2.4

3.1

3.8

4.5

5.2

90°C

25°C

-40°C

Voltage

5.025

5.000

4.975

3.525

3.500

3.475

2.525

2.500

2.475

025

85

Temperature

VTRIP = 5V

VTRIP = 3.5V

VTRIP = 2.5V

0.8

0.75

0.7

0.65

0.6

0.55

0.5

0.45

1.7

5.2

Voltage

2.4

3.1

3.8

4.5

90°C

25°C

-40°C

200

195

190

185

180

175

170

165

160

-40

25

90

Degrees °C

205

90°C

25°C

-40°C

200

195

190

185

180

175

170

165

160

205

Voltage

1.7

5.2

2.4

3.1

3.8

4.5