MT9046 Zarlink Semiconductor, MT9046 Datasheet - Page 32

• Manufacturer Part Number: MT9046
• Description: T1/E1 System Synchronizer with Holdover
• Manufacturer: Zarlink Semiconductor

† 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. 1.544 MHz Frequency Mode selected.
8. 2.048 MHz Frequency Mode selected.
9. 19.44 MHz Frequency Mode selected.
10. Master clock input OSCi at 20 MHz
11. Master clock input OSCi at 20 MHz
12. Master clock input OSCi at 20 MHz
13. Selected reference input at
14. Selected reference input at
15. Selected reference input at
16. For Freerun Mode of
17. For Freerun Mode of
18. For Freerun Mode of
19. For capture range of
20. For capture range of
21. For capture range of
22. 25 pF capacitive load.
23. OSCi Master Clock jitter is less than 2 nspp, or 0.04 UIpp where1 UIpp=1/20 MHz.
24. Jitter on reference input is less than 7 nspp.
25. Applied jitter is sinusoidal.
26. Minimum applied input jitter magnitude to regain synchronization.
27. Loss of synchronization is obtained at slightly higher input jitter amplitudes.
28. Within 10 ms of the state, reference or input change.
29. 1 UIpp = 125 us for 8 kHz signals.
30. 1 UIpp = 648 ns for 1.544 MHz signals.
31. 1 UIpp = 488 ns for 2.048 MHz signals.
32. 1 UIpp = 323 ns for 3.088 MHz signals.
33. 1 UIpp = 244 ns for 4.096 MHz signals.
34. 1 UIpp = 122 ns for 8.192 MHz signals.
35. 1 UIpp = 61 ns for 16.384 MHz signals.
36. 1 UIpp = 51.44 ns for 19.44 MHz signals.
37. No filter.
38. 40 Hz to 100 kHz bandpass filter.
39. With respect to reference input signal frequency.
40. After a RST or TCLR.
41. Master clock duty cycle 40% to 60%.
42. Prior to Holdover Mode, device was in Normal Mode and phase locked.
AC Electrical Characteristics - OSCi 20 MHz Master Clock Input
1
2
3
4
5
6
Tolerance
Duty cycle
Rise time
Fall time
Characteristics
±
±
±
±
±
±
230 ppm.
198 ppm.
130 ppm.
0 ppm.
32 ppm.
100 ppm.
±
±
±
0 ppm.
32 ppm.
100 ppm.
SS
±
±
±
) unless otherwise stated.
32 ppm.
0 ppm.
100 ppm.
Zarlink Semiconductor Inc.
MT9046
Sym.
32
Min.
-100
-32
40
-0
Max.
+100
+32
+0
60
10
10
Units
ppm
ppm
ppm
ns
ns
%
16,19
17,20
18,21
Conditions/Notes†
Data Sheet