Silicon Oscillator with Low-Power

Frequency Switching and Reset Output

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5

FREQUENCY vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.2

4.9

4.6

3.92

3.94

3.96

3.98

4.00

4.02

4.04

4.06

4.08

4.10

3.90

4.3

5.5

CLOCK = 4MHz

FREQUENCY vs. TEMPERATURE

TEMPERATURE (

°C)

120

95

45

70

-5

20

-30

32.1

32.2

32.3

32.4

32.5

32.6

32.7

32.8

32.9

33.0

32.0

-55

CLOCK = 32kHz

FREQUENCY vs. TEMPERATURE

TEMPERATURE (

°C)

120

95

45

70

-5

20

-30

3.92

3.94

3.96

3.98

4.00

4.02

4.04

4.06

4.08

4.10

3.90

-55

CLOCK = 4MHz

CLOCK OUTPUT WAVEFORM (CL = 10pF)

MAX7378 toc13

40ns/div

F = 4MHz, CL = 10pF

CLOCK OUTPUT WAVEFORM (CL = 50pF)

MAX7378 toc14

40ns/div

F = 4MHz, CL = 50pF

CLOCK OUTPUT WAVEFORM (CL = 100pF)

MAX7378 toc15

40ns/div

F = 4MHz, CL = 100pF

MAXIMUM TRANSIENT DURATION

vs. RESET THRESHOLD

RESET THRESHOLD OVERDRIVE (mV)

200

400

600

800

100

1000

10

01000

RESET = 4.29V

RESET OCCURS

ABOVE THE CURVE

HIGH-SPEED TO LOW-SPEED

TRANSITION

MAX7378 toc17

CLOCK

SPEED

20

µs/div

HIGH-SPEED TO LOW-SPEED

TRANSITION (EXPANDED SCALE)

MAX7378 toc18

CLOCK

SPEED

400

µs/div

Typical Operating Characteristics (continued)