MT9042C Mitel Networks Corporation, MT9042C Datasheet - Page 25

• Manufacturer Part Number: MT9042C
• Description: Multitrunk System Synchronizer
• Manufacturer: Mitel Networks Corporation

Advance Information
AC Electrical Characteristics - OSCi 20MHz Master Clock Input
† See "Notes" following AC Electrical Characteristics tables.
† Notes:
Voltages are with respect to ground (V
Supply voltage and operating temperature are as per Recommended Operating Conditions.
Timing parameters are as per AC Electrical Characteristics - Timing Parameter Measurement Voltage Levels
1. PRI reference input selected.
2. SEC reference input selected.
3. Normal Mode selected.
4. Holdover Mode selected.
5. Freerun Mode selected.
6. 8kHz Frequency Mode selected.
7. 1.544MHz Frequency Mode selected.
8. 2.048MHz Frequency Mode selected.
9. Master clock input OSCi at 20MHz 0ppm.
10. Master clock input OSCi at 20MHz 32ppm.
11. Master clock input OSCi at 20MHz 100ppm.
12. Selected reference input at 0ppm.
13. Selected reference input at 32ppm.
14. Selected reference input at 100ppm.
15. For Freerun Mode of 0ppm.
16. For Freerun Mode of 32ppm.
17. For Freerun Mode of 100ppm.
18. For capture range of 230ppm.
19. For capture range of 198ppm.
20. For capture range of 130ppm.
21. 25pF capacitive load.
22. OSCi Master Clock jitter is less than 2nspp, or 0.04UIpp where1UIpp=1/20MHz.
23. Jitter on reference input is less than 7nspp.
24. Applied jitter is sinusoidal.
25. Minimum applied input jitter magnitude to regain synchronization.
26. Loss of synchronization is obtained at slightly higher input jitter amplitudes.
27. Within 10ms of the state, reference or input change.
28. 1UIpp = 125us for 8kHz signals.
29. 1UIpp = 648ns for 1.544MHz signals.
30. 1UIpp = 488ns for 2.048MHz signals.
31. 1UIpp = 323ns for 3.088MHz signals.
32. 1UIpp = 244ns for 4.096MHz signals.
33. 1UIpp = 122ns for 8.192MHz signals.
34. 1UIpp = 61ns for 16.384MHz signals.
35. No filter.
36. 40Hz to 100kHz bandpass filter.
37. With respect to reference input signal frequency.
38. After a RST or TRST.
39. Master clock duty cycle 40% to 60%.
40. Prior to Holdover Mode, device was in Normal Mode and phase locked.
1
2
3
4
5
6
Frequency accuracy
Duty cycle
Rise time
Fall time
(20 MHz nominal)
Characteristics
SS
) unless otherwise stated.
Sym
-100
Min
-32
40
-0
+100
Max
+32
+0
60
10
10
Units
ppm
ppm
ppm
ns
ns
%
15,18
16,19
17,20
Conditions/Notes†
MT9042C
25