zl30105 Zarlink Semiconductor, zl30105 Datasheet - Page 40

• Manufacturer Part Number: zl30105
• Description: Stratum 3 Redundant System Clock Synchronizer For T1/e1/sdh, Advanced Tca And H.110
• Manufacturer: Zarlink Semiconductor

AC Electrical Characteristics* - Input timing for REF2_SYNC (see Figure 27).
* Supply voltage and operating temperature are as per Recommended Operating Conditions.
* See Figure 18, “Examples of REF2 & REF2_SYNC to Output Alignment” on page 28 for further explanation.
Note:
REF2 can be 1.544 MHz, 2.048 MHz, 8.192 MHz, 16.384 MHz or 19.44 MHz.
REF2_SYNC can be 2 kHz or 8 kHz.
1
2
3
4
5
REF2
REF2_SYNC
REF0/1/2
output clock with the
same frequency as
REF
F8_32o
REF2_SYNC lead time
REF2_SYNC pulse
width high or low
REF2_SYNC lag time
Characteristics
Figure 26 - REF0/1/2 Input Timing and Input to Output Timing
REF2_SYNC
2 kHz, 8 kHz
frequency
2 kHz
8 kHz
2 kHz
8 kHz
Figure 27 - REF2_SYNC Timing
t
REFW
Zarlink Semiconductor Inc.
t
t
t
t
t
Symbol
SYNC_LD
SYNC_LD
SYNC_LG
SYNC_LG
SYNC_W
ZL30105
t
SYNC_LD
40
t
REF<xx>P
Min.
15
t
REF8kD
t
REFP
t
t
REFW
SYNC_LG
, t
t
t
REFP
REFP
REF<xx>_F8D
edge used for alignment
Max.
12
t
0
REF<xx>D
- 15
- 28
t
SYNC_W
Units
ns
ns
ns
ns
ns
period of REF2 clock
period of REF2 clock
t
t
REFP
REFP
Notes
= minimum
= minimum
Data Sheet