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參數(shù)資料
| 型號(hào)： | ZL30111QDG |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | POTS Line Card PLL |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, MS-026ACD, TQFP-64 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 189K |
| 代理商： | ZL30111QDG |
ZL30111
Data Sheet
8
Zarlink Semiconductor Inc.
2.0 Functional Description
The ZL30111 POTS line card PLL contains a digital phase-locked loop (DPLL), which provides timing and
synchronization for SLIC/CODEC devices. Figure 1 is a functional block diagram which is described in the
following sections.
2.1 Reference Monitor
The input reference is monitored by two reference monitor blocks. The block diagram of reference monitoring is
shown in Figure 3. The reference frequency is detected and the clock is continuously monitored for two
independent criteria that indicate abnormal behavior of the reference signal, for example; loss of clock or excessive
level of frequency error. To ensure proper operation of the reference monitor circuit, the minimum input pulse
width restriction of 15 nsec must be observed.
Reference Frequency Detector (RFD)
: This detector determines whether the frequency of the reference
clock is 8 kHz, 2.048 MHz, 8.192 MHz or 19.44 MHz and provides this information to the various monitor
circuits and the phase detector circuit of the DPLL.
Coarse Frequency Monitor (CFM)
: This circuit monitors the reference frequency over intervals of
approximately 30
μ
s to quickly detect large frequency changes.
Single Cycle Monitor (SCM)
: This detector checks the period of a single clock cycle to detect large phase
hits or the complete loss of the clock.
Figure 3 - Reference Monitor Circuit
Exceeding the thresholds of any of the monitors forces the corresponding REF_FAIL pin to go high. The single
cycle and coarse frequency failure flags force the DPLL into FreeRun mode.
Reference Frequency
Detector
Single Cycle
Monitor
Coarse Frequency
Monitor
REF
OR
Mode select
state machine
DPLL in FreeRun Mode
REF_FAIL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZL30111QDG1 | POTS Line Card PLL |
| ZL30116 | SONET/SDH OC-48/OC-192 System Synchronizer |
| ZL30116GGG | SONET/SDH OC-48/OC-192 System Synchronizer |
| ZL30116GGG2 | SONET/SDH OC-48/OC-192 System Synchronizer |
| ZL30117 | SONET/SDH OC-48/OC-192 Line Card Synchronizer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZL30111QDG1 | 制造商:Microsemi Corporation 功能描述:POTS LINE CARD PLL - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC POTS LINE CARD PLL 64TQFP 制造商:Microsemi Corporation 功能描述:IC POTS LINE CARD PLL 64TQFP |
| ZL30112LDG1 | 制造商:Microsemi Corporation 功能描述:PB FREE SLIC/CODEC DPLL - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC/CODEC PLL 32QFN 制造商:Microsemi Corporation 功能描述:IC SLIC/CODEC PLL 32QFN |
| ZL30113LDF1 | 制造商:Microsemi Corporation 功能描述:PB FREE RATE CONVERSION DPLL - Bulk 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC/CODEC PLL 32QFN 制造商:Microsemi Corporation 功能描述:IC SLIC/CODEC PLL 32QFN |
| ZL30113LDG1 | 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC/CODEC PLL 32QFN 制造商:Microsemi Corporation 功能描述:IC SLIC/CODEC PLL 32QFN |
| ZL30116 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH OC-48/OC-192 System Synchronizer |
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