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參數(shù)資料
| 型號： | ZL30105QDG1 |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | T1/E1/SDH Stratum 3 Redundant System Clock Synchronizer for AdvancedTC TM and H.110 |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, LEAD FREE, MS-026ACD, TQFP-64 |
| 文件頁數(shù)： | 24/52頁 |
| 文件大?。?/td> | 1097K |
| 代理商： | ZL30105QDG1 |
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ZL30105
Data Sheet
24
Zarlink Semiconductor Inc.
Figure 13 - Reference Switching in Normal Mode
4.5.2 Automatic Reference Switching
In the automatic mode of operation (MODE_SEL1:0
=
11), the ZL30105 automatically selects a reference input that
is not out-of-range (REF_OOR=0, see Figure 3). The state machine can only select REF0 or REF1; REF2 cannot
be selected in the Automatic mode (see Figure 14).
If the current reference (REF0 or REF1) used for synchronization fails, the state machine will switch to the other
reference. If both references fail then the ZL30105 enters the Holdover mode without switching to another
reference. When the ZL30105 comes out of reset or when REF2 is the current reference when the ZL30105 is put
in the Automatic mode, then REF0 has priority over REF1. Otherwise there is no preference for REF0 or REF1
which is referred to as non-revertive reference selection.
Figure 14 - Reference Selection in Automatic Mode (MODE_SEL=11)
In the automatic mode of operation, both pins REF_SEL1 and REF_SEL0 are configured as outputs. The logic level
on the REF_SEL0 output indicates the current input reference being selected for synchronization (see Table 6).
REF_SEL1
(output pin)
REF_SEL0
(output pin)
Input Reference
0
0
REF0
0
1
REF1
Table 6 - The Reference Selection Pins in the Automatic Mode (MODE_SEL=11)
REF1
REF0
REF_SEL
LOCK
Lock Time
Note: LOCK pin behaviour depends on phase and frequency offset of REF1.
REF0
Reference
REF1
Reference
REF_OOR0=1 &&
REF_OOR1=0
RST && REF_OOR0=0
RST && REF_OOR0=1 && REF_OOR1=0
REF_OOR0=0 &&
REF_OOR1=1
REF2
Reference
REF_OOR0=1 && REF_OOR1=0
REF_OOR0=0
REF_OOR = reference out of range, see Figure 3.
This is an internal signal.
相關PDF資料 |
PDF描述 |
|---|---|
| ZL30105 | Power Clamp On Multimeter; DMM Type:Clamp; No. of Digits/Alpha:3-3/4; DMM Response Type:True RMS; Approval Categories:CAT III 600V; Calibrated:No; Current Measuring Range:0-400.0A; Current Setting AC:400A RoHS Compliant: NA |
| ZL30105QDG | Digital Clamp-On Meter; DMM Type:Clamp; No. of Digits/Alpha:3-3/4; DMM Response Type:True RMS; Calibrated:No; Current Setting AC:1000A; Resistance Measuring Range:400 Ohm to 10 MOhm; Voltage Measuring Range AC:600V RoHS Compliant: NA |
| ZL30106QDG1 | SONET/SDH/PDH Network Interface DPLL |
| ZL30106 | SONET/SDH/PDH Network Interface DPLL |
| ZL30106QDG | SONET/SDH/PDH Network Interface DPLL |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ZL30106 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH/PDH Network Interface DPLL |
| ZL30106_05 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH/PDH Network Interface DPLL |
| ZL30106QDG | 制造商:Zarlink Semiconductor Inc 功能描述:SONET/SDH/PDH NETWORK INTRFC 64TQFP - Trays 制造商:Microsemi 功能描述:Microsemi ZL30106QDG Communication Misc |
| ZL30106QDG1 | 制造商:Zarlink Semiconductor Inc 功能描述:SONET/SDH/PDH NETWORK INTRFC 64TQFP - Trays 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE SONET/SDH/PDH NTWK INTERFACEDPLL |
| ZL30107 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:GbE Line Card Synchronizer |
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