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C500和C166微控制器系列的晶振
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1 Introduction . . . . 5
2 Oscillator-Inverter . . . . 5
2.1 Oscillator Inverter Type_A, Type_B and Type_C 5
2.2 Oscillator Inverter Type_R 6
2.3 Oscillator Inverter Type_RE . . . . 6
2.4 Oscillator Inverter Type_LP1 and Type_LP2 . . . 6
2.5 Oscillator Inverter Type_RTC1 . . 6
2.6 Oscillator Inverter Type_RTC2 . . 6
3 Fundamental Mode and 3rd Overtone . . 7
4 Oscillator Start-up Time 9
4.1 Definition of the Oscillator Start-up Time tst_up . 9
4.2 Definition of the Oscillator Off Time toff . 10
5 Drive Level . . . . 11
5.1 Measurement Method of Drive Current . 11
5.2 Drive Level Calculation for Fundamental Mode 12
5.3 Drive Level Calculation for 3rd Overtone Mode 13
6 Start-up- and Oscillation Reliability . . . 14
6.1 Principle of the Negative Resistance Method . 14
6.2 Measurement Method of Start-up- and Oscillation Reliability . 15
6.3 Safety Factor . . 17
6.4 Trouble Shooting . . . . 18
6.4.1 Pull down Resistor RX1 18
6.4.2 Feedback Resistor Rf 18
6.5 Qualification of the Results . . . 20
7 Oscillator Circuitry Layout Recommendations . 21
7.1 Avoidance of Capacitive Coupling 21
7.2 Ground Connection of the Crystal Package . . . 21
7.3 Avoidance of Parallel Tracks of High Frequency Signals . . . . 21
7.4 Ground Supply . 21
7.5 Correct Module Placement . . . . 21
7.6 Layout Examples . . . . 22
8 Used Short Cuts 24
9 Recommendations of the Crystal Manufacturer Tele Quarz Group 26
10 General Information using the Appendix . . . . 26
11 Appendix C500 Family 27
11.1 C500 Family: Relation between Oscillator-Inverter Type and Device Type . . . . 27
11.2 C500 Family: Type_A Oscillator-Inverter 28
11.3 C500 Family: Type_B Oscillator-Inverter 29
11.4 C500 Family: Type_C Oscillator-Inverter 30
12 Appendix C166 Family 31
12.1 C166 Family: Relation between Oscillator-Inverter Type and Device Type . . . . 31
12.2 C166 Family: Type_R and Type_RE Oscillator-Inverters . . . . 33
12.2.1 C166 Family: Type_R and Type_RE Oscillator-Inverter Fundamental Mode . 34
12.2.2 C166 Family: Type_R and Type_RE Oscillator-Inverter 3rd Overtone Mode . 35
12.3 C166 Family: Type_LP1 Oscillator-Inverter . . . 36
12.4 C166 Family: Type_LP2 Oscillator-Inverter . . . 37
12.5 C166 Family: Type_RTC1 Oscillator-Inverter . 38
12.6 C166 Family: Type_RTC2 Oscillator-Inverter . 39
13 Quartz Crystals for the C500 and C166 Family . 40
13.1 Fundamental Mode Quartz Crystal for Standard Temperature Range 40
13.2 Fundamental Mode Quartz Crystal for Advanced Temperature Range 41
13.3 3rd Overtone Mode Quartz Crystal for Standard Temperature Range 42
13.4 3rd Overtone Mode Quartz Crystal for Advanced Temperature Range 42
13.5 Real Time Clock Quartz Crystal 43
14 TELE QUARZ GROUP Sales Offices . . . 44
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