Page 9

OCT. 2001

Single Resistor Oscillator

SM5172's oscillator be constructed by connecting a resistor between OSC1 and OSC2 pin.

SM5172's OSC frequency must be 1.8 to 5.8 times more than SM5162.

300

0

36

9

12

15 VOLTAGE

R = 100 K

R = 300 K

R = 620 K

R = 680 K

R = 820 K

R = 1.0 M

200

100

50

110

250

R = 510K

R = 1.2 M

R = 2.7 M

R = 3.0 M

R = 3.3 M

R = 4.3 M

Encoder OSC Frequency

Dncoder OSC Frequency

Suggested oscillator resistor of SM5162/ SM5172:

SM5162

SM5172

4.7M OHM

820K OHM

3.0M OHM

620K OHM

2.2M OHM

300K OHM

1.2M OHM

180K OHM

KHz

100

KHz

0

36

9

12

15 VOLTAGE

90

80

70

60

50

40

30

20

10

SM5172

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