pt7a4401b Pericom Technology Inc, pt7a4401b Datasheet - Page 24

• Manufacturer Part Number: pt7a4401b
• Description: Pt7a4401b T1/e1 System Synchronizer
• Manufacturer: Pericom Technology Inc

PT0018(05/02)
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Test Conditions:
1. Normal State selected.
2. Auto-Holdover State.
3. Freerun State selected.
4. 8kHz frequency source selected.
5. 1.544MHz frequency source selected.
6. 2.048MHz frequency source selected.
7. Master clock input OSCi at 20MHz ±0ppm.
8. Master clock input OSCi at 20MHz ±32ppm.
9. Master clock input OSCi at 20MHz ±100ppm.
10. Reference input at ±0ppm.
11. Reference input at ±32ppm.
12. Reference input at ±100ppm.
13. For Freerun State of ±0ppm.
14. For Freerun State of ±32ppm.
15. For Freerun State of ±100ppm.
16. For capture range of ±230ppm.
17. For capture range of ±198ppm.
18. For capture range of ±130ppm.
19. 25pF capacitive load.
20. OSCi Master Clock Jitter is less than 2ns p-p, or 0.04UI
Notes:
1. Voltages are with respect to ground (GND) unless otherwise stated.
2. Supply voltage and operation temperature are as per Recommended Operating Conditions.
3. Timing parameters are as per AC Electrical Characteristics - Voltage Levels for Timing Parameter Measurement.
p-p where 1UI p-p = 1/20MHz.
24
PT7A4401B T1/E1 System Synchronizer
21. Jitter on reference input is less than 7ns p-p.
22. Applied jitter is sinusoidal.
23. Minimum applied input jitter magnitude to regain syn-
24. Loss of synchronization is obtained at slightly higher in-
25. Within 10 ms of the state or input change
26. 1UIpp = 125ms for 8kHz signals.
27. 1UIpp = 648ns for 1.544MHz signals.
28. 1UIpp = 488ns for 2.048MHz signals.
29. 1UIpp = 323ns for 3.088MHz signals.
30. 1UIpp = 244ns for 4.096MHz signals.
31. 1UIpp = 122ns for 8.192MHz signals.
32. 1UIpp = 61ns for 16.384MHz signals.
33. No filter.
34. 40Hz to 100kHz bandpass filter.
35. With respect to reference input signal frequency.
36. After a RST.
37. Master clock duty cycle 40% to 60%.
38. Prior to Auto-Holdover State, device was in Normal State
chronization.
and phase-locked.
put jitter amplitudes.
Data Sheet
Ver:1