- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373783 > ZL30122GGG (ZARLINK SEMICONDUCTOR INC) SONET/SDH Low Jitter Line Card Synchronizer PDF資料下載
參數(shù)資料
| 型號： | ZL30122GGG |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | SONET/SDH Low Jitter Line Card Synchronizer |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PBGA64 |
| 封裝： | 9 X 9 MM, 1 MM PITCH, CABGA-64 |
| 文件頁數(shù)： | 10/23頁 |
| 文件大小： | 246K |
| 代理商： | ZL30122GGG |
ZL30122
Data Sheet
10
Zarlink Semiconductor Inc.
1.2 DPLL Mode Of Operation
The DPLL supports three modes of operation - free-run, normal, and holdover. The mode of operation can be
manually set or controlled by an automatic state machine as shown in Figure 2.
Figure 2 - Automatic Mode State Machine
Free-run
The free-run mode occurs immediately after a reset cycle or when the DPLL has never been synchronized to a
reference input. In this mode, the frequency accuracy of the output clocks is equal to the frequency accuracy of the
external master oscillator.
Lock Acquisition
The input references are continuously monitored for frequency accuracy and phase regularity. If at least one of the
input references is qualified by the reference monitors, then the DPLL will begin lock acquisition on that input. Given
a stable reference input, the ZL30122 will enter in the Normal (locked) mode.
Normal (locked)
The usual mode of operation for the DPLL is the normal mode where the DPLL phase locks to a selected qualified
reference input and generates output clocks and frame pulses with a frequency accuracy equal to the frequency
accuracy of the reference input. While in the normal mode, the DPLL’s clock and frame pulse outputs comply with
the MTIE and TDEV wander generation specifications as described in Telcordia and ITU-T telecommunication
standards.
Holdover
When the DPLL operating in the normal mode loses its reference input, and no other qualified references are
available, it will enter the holdover mode and continue to generate output clocks based on historical frequency data
collected while the DPLL was synchronized. The transition between normal and holdover modes is controlled by
the DPLL so that its initial frequency offset is better than 100 ppb. The frequency drift after this transition period is
dependant on the frequency drift of the external master oscillator.
Reset
Another reference is
qualified and available
for selection
Phase lock on
the selected
reference is
achieved
Lock
Acquisition
(Locked)
No references are
qualified and
available for
selection
Free-Run
Holdover
Selected reference
fails
All references are monitored
for frequency accuracy and
phase regularity, and at least
one reference is qualified.
Normal
相關PDF資料 |
PDF描述 |
|---|---|
| ZL30406 | SONET/SDH Clock Multiplier PLL |
| ZL30406QGC | Digital Multimeter Clamp Battery Size Code:9V; Current Measuring Range:40.00/400.0A; Current Setting AC:400A; Current Setting DC:400A; Resistance Measuring Range:400 Ohm, 4000 - 40 - 400 kOhm; Voltage Measuring Range AC:600 V RoHS Compliant: NA |
| ZL30406QGC1 | SONET/SDH Clock Multiplier PLL |
| ZL30409 | T1/E1 System Synchronizer with Stratum 3 Holdover |
| ZL30410 | CONN HDR INVERSE 30POS 5ROW VERT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ZL30122GGG2 | 制造商:Microsemi Corporation 功能描述:PB FREE SONET/SDH PLL LINE CARD SYNCH. 制造商:Microsemi Corporation 功能描述:SONET/SDH LOW JITTER LINE CARD SYNCHRONIZER 64CABGA - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SONET/SDH SYNCH 64CABGA 制造商:Microsemi Corporation 功能描述:IC SONET/SDH SYNCH 64CABGA |
| ZL30123 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Low Jitter Line Card Synchronizer |
| ZL30123GGG | 制造商:Microsemi Corporation 功能描述:SONET/SDH LOW JITTER LINE CARD SYNCHRONIZER 100CABGA - Trays 制造商:Microsemi Corporation 功能描述:SONET/SDHPLLLINECARDSYNCHRONIZER 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SONET/SDH SYNCH 100CABGA 制造商:Microsemi Corporation 功能描述:IC SONET/SDH SYNCH 100CABGA |
| ZL30123GGG2 | 制造商:Microsemi Corporation 功能描述:SONET/SDH LOW JITTER LINE CARD SYNCHRONIZER 100CABGA - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SONET/SDH SYNCH 100CABGA 制造商:Microsemi Corporation 功能描述:IC SONET/SDH SYNCH 100CABGA |
| ZL30130GGG | 制造商:Microsemi Corporation 功能描述:OC-12 SONET/SDH 1GBE S2/S3E/S3/S4E SETS TIMING CARD - Trays 制造商:Zarlink Semiconductor Inc 功能描述:OC-12 SONET/SDH 1GBE S2/S3E/S3/S4E SETS TIMING CARD - Trays |
發(fā)布緊急采購，3分鐘左右您將得到回復。