ASTMUPC datasheet(4/10 Pages) ABRACON

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PART IDENTIFICATION:

ASTMUPC

High Performance, Programmable LVCMOS SMD MEMS Oscillator

ASTMUPC

2.7 x 2.4 x 0.75mm; 3.2 x 2.5 x 0.75mm;

5.0 x 3.2 x 0.75mm; 7.0 x 5.0 x 0.9mm

Based on the rise and fall time data given in Table 1 through 4, the maximum frequency the oscillator can operate with

a guaranteed full swing of the output voltage over temperature is calculated as follows:

Example:

Calculate Fmax of a 1MHz ~ 80MHz device with the following condition:

• Vdd = 1.8V (Table 1)

• Capacitive Load = 30pF

• Desired Tr/f Time: = 3ns (rise/fall time option code “G”)

The Fmax is 55.5000000MHz.

Table 3: Vdd=2.8V Rise/Fall Times for Specific CLOAD

Rise/Fall Time Typ. (ns)

Drive

Strength

Options

CLOAD

5pF

15pF

30pF

45pF

60pF

7.93

12.69

17.94

30.10

38.89

4.06

6.66

11.04

15.31

19.80

2.68

4.40

7.53

10.29

13.37

2.00

3.25

5.66

7.84

10.11

1.59

2.57

4.54

6.27

8.07

1.19

2.14

3.76

5.21

6.72

1.00

1.79

3.20

4.43

5.77

0.94

1.51

2.78

3.84

5.06

0.90

1.38

2.48

3.40

4.50

0.87

1.29

2.21

3.03

4.05

0.62

1.19

1.99

2.76

3.68

G or Blank

(default)

0.41

1.08

1.84

2.52

3.36

0.37

0.96

1.72

2.33

3.15

0.35

0.78

1.63

2.15

2.92

0.33

0.67

1.54

2.00

2.75

0.32

0.63

1.46

1.89

2.57

0.31

0.60

1.39

1.80

2.43

0.30

0.57

1.31

1.72

2.30

0.30

0.56

1.22

1.63

2.22

0.29

0.54

1.13

1.55

2.13

Table 4: Vdd=3.3V Rise/Fall Times for Specific CLOAD

Rise/Fall Time Typ. (ns)

Drive

Strength

Options

CLOAD

5pF

15pF

30pF

45pF

60pF

7.18

11.59

17.24

27.57

35.57

3.61

6.02

10.19

13.98

18.10

2.31

3.95

6.88

9.42

12.24

1.65

2.92

5.12

7.10

9.17

1.43

2.26

4.09

5.66

7.34

1.01

1.91

3.38

4.69

6.14

0.94

1.51

2.86

3.97

5.25

0.90

1.36

2.50

3.46

4.58

0.86

1.25

2.21

3.03

4.07

F or Blank

(default)

0.48

1.15

1.95

2.72

3.65

0.38

1.04

1.77

2.47

3.31

0.36

0.87

1.66

2.23

3.03

0.34

0.70

1.56

2.04

2.80

0.33

0.63

1.48

1.89

2.61

0.32

0.60

1.40

1.79

2.43

0.32

0.58

1.31

1.69

2.28

0.30

0.56

1.22

1.62

2.17

0.30

0.55

1.12

1.54

2.07

0.30

0.54

1.02

1.47

1.97

0.29

0.52

0.95

1.41

1.90

CALCULATING MAXIMUM FREQUENCY

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