- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359234 > MT9046 (Zarlink Semiconductor Inc.) T1/E1 System Synchronizer with Holdover PDF資料下載
參數(shù)資料
| 型號： | MT9046 |
| 廠商： | Zarlink Semiconductor Inc. |
| 元件分類： | 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 |
| 文件頁數(shù)： | 20/34頁 |
| 文件大小： | 508K |
| 代理商： | MT9046 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁
MT9046
Data Sheet
20
Zarlink Semiconductor Inc.
0.2 ppm is the accuracy of Holdover Mode
50 ns is the maximum phase continuity of the MT9046 from Normal Mode to Holdover Mode
200 ns is the maximum phase continuity of the MT9046 from Holdover Mode to Normal Mode (with or
without TIE Corrector Circuit)
When 10 Normal to Holdover to Normal mode change sequences occur without MTIE enabled, and in each case
holdover was entered for 2s, each mode change sequence could still account for a phase change as large as
650 ns. However, there would be no accumulated phase change, since the input to output phase is re-aligned after
every Holdover to Normal state change. The overall MTIE would only be 650 ns.
Reset Circuit
A simple power up reset circuit with about a 50 us reset low time is shown in Figure 10. Resistor R
P
is for protection
only and limits current into the RST pin during power down conditions. The reset low time is not critical but should
be greater than 300 ns.
Figure 10 - Power-Up Reset Circuit
Lock Indicator
The LOCK pin toggles at a random rate when the PLL is frequency locked to the input reference. In Figure 11 the
RC-time-constant circuit can be used to hold the high state of the LOCK pin.
Once the PLL is frequency locked to the input reference, the minimum duration of LOCK pin’s high state would be
32 ms and the maximum duration of LOCK pin’s low state would not exceed 1 second. The following equations can
be used to calculate the charge and discharge times of the capacitor.
t
C
=
- R
D
C ln(1 – V
T+
/V
DD
) = 240
μ
s
t
C
= Capacitor’s charge time
R
D
= Dynamic resistance of the diode (100
)
C = Capacitor value (1
μ
F)
V
T+
= Positive going threshold voltage of the
Schmitt Trigger (3.0 V)
Phasehold
Phasestate
Phase10
0.2ppm
2s
×
400ns
=
=
50ns
200ns
250ns
=
+
=
10
250ns
400ns
+
(
)
×
6.5us
=
=
+3.3 V
RST
R
P
1 k
C
10 nF
R
10 k
MT9046
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT9046AN | T1/E1 System Synchronizer with Holdover |
| MT90503 | 2048VC AAL1 SAR |
| MT90503AG | CLIP, STRAIN RELIEF, 50WAY; For use with:820 Series Tripolarized Wiremount Sockets; Ways, No. of:50; Material:Metal; Connector type:Strain Relief RoHS Compliant: Yes |
| MT90520 | 8-Port Primary Rate Circuit Emulation AAL1 SAR |
| MT90520AG | 8-Port Primary Rate Circuit Emulation AAL1 SAR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9046AN | 制造商:Microsemi Corporation 功能描述: |
| MT9046AN1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER T1/E1 48SSOP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER T1/E1 48SSOP |
| MT9046ANR1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER T1/E1 48SSOP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER T1/E1 48SSOP |
| MT9048 | 制造商:DBLECTRO 制造商全稱:DB Lectro Inc 功能描述:Standard Type |
| MT90489 | 制造商: 功能描述: 制造商:undefined 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。