3.3V Spread-Spectrum EconOscillator

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5

Note 1:

All voltages are referenced to ground.

Note 2:

This is the absolute accuracy of the master oscillator frequency at the default settings.

Note 3:

This is the change that is observed in master oscillator frequency with changes in voltage from nominal voltage at

Note 4:

Note 5:

The dither deviation of the master oscillator frequency is unidirectional and lower than the undithered frequency.

Note 6:

This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally

on the programmed master oscillator frequency.

Note 7:

Output voltage swings may be impaired at high frequencies combined with high output loading.

Note 8:

is automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch

250ns = 1250ns before the SCL line is released.

Note 9:

After this period, the first clock pulse is generated.

Note 10:

nal) to bridge the undefined region of the falling edge of SCL.

Note 11:

Note 12:

Note 13:

Typical frequency shift due to aging is ±0.5%. Aging stressing includes Level 1 moisture reflow preconditioning (24hr

+125°C bake, 168hr 85°C/85%RH moisture soak, and 3 solder reflow passes +240 +0/-5°C peak) followed by 1000hr

Autoclave.

Typical Operating Characteristics

ACTIVE SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

80

70

60

50

40

30

20

10

0

-10

-20

-30

5.5

6.0

6.5

7.0

7.5

5.0

-40

90

FREQUENCY = 66.6MHz

15pF LOAD

8.2pF LOAD

4.7pF LOAD

UNLOADED

VOLTAGE (V)

3.5

3.4

2.8 2.9 3.0

3.2

3.1

3.3

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

0

2.7

3.6

ACTIVE SUPPLY CURRENT

vs. VOLTAGE

FREQUENCY = 66.6MHz

OUTPUT UNLOADED

SUPPLY CURRENT vs. PRESCALER

PRESCALER (DECIMAL)

100

10

11000

1

2

3

4

5

6

7

0

OUTPUT UNLOADED

3.6V

3.3V

2.7V