參數(shù)資料
型號(hào)： MT9046
廠商： Zarlink Semiconductor Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： T1/E1 System Synchronizer with Holdover
中文描述： T1/E1的系統(tǒng)同步的緩繳暫繳稅
文件頁(yè)數(shù)： 32/34頁(yè)
文件大小： 508K
代理商： MT9046
MT9046
Data Sheet
32
Zarlink Semiconductor Inc.
See “Notes” following AC Electrical Characteristics tables.
Notes:
Voltages are with respect to ground (V
) unless otherwise stated.
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
±
0 ppm.
11. Master clock input OSCi at 20 MHz
±
32 ppm.
12. Master clock input OSCi at 20 MHz
±
100 ppm.
13. Selected reference input at
0 ppm.
14. Selected reference input at
±
32 ppm.
15. Selected reference input at
±
100 ppm.
16. For Freerun Mode of
0 ppm.
17. For Freerun Mode of
±
32 ppm.
18. For Freerun Mode of
±
100 ppm.
19. For capture range of
±
230 ppm.
20. For capture range of
±
198 ppm.
21. For capture range of
±
130 ppm.
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
Characteristics
Sym.
Min.
Max.
Units
Conditions/Notes
1
Tolerance
-0
+0
ppm
16,19
2
-32
+32
ppm
17,20
3
-100
+100
ppm
18,21
4
Duty cycle
40
60
%
5
Rise time
10
ns
6
Fall time
10
ns
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