參數(shù)資料
型號： ZL50018QCC
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 路由/交換
英文描述： 2 K Digital Switch with Enhanced Stratum 3 DPLL
中文描述： TELECOM, DIGITAL TIME SWITCH, PQFP256
封裝： 28 X 28 MM, 1.40 MM HEIGHT, MS-026BJC, LQFP-256
文件頁數(shù)： 72/136頁
文件大小： 1448K
代理商： ZL50018QCC
ZL50018
Data Sheet
72
Zarlink Semiconductor Inc.
Bit
Name
Description
15 - 0
LDT15 - 0
Lock Detect Threshold Bits
The binary value of these bits defines the upper limit of the absolute phase from the
phase detector output for lock detection.
When the value of the absolute phase is less than or equal to LDT for duration of time
defined by the LDIR register, the DPLL locks.
When the value of the absolute phase is greater than LDT for duration of time defined by
the LDIR register divided by 256, the DPLL does not lock.
Note: LDT should be calculated as per the maximum expected amplitude of jitter on the active input reference
using the following formula:
LDT = MAX_EXP_JITTER (ns) x 2
15.2 (ns)
Example: If maximum expected jitter amplitude on 2.048 MHz reference is 10UI (i.e., 10 x 488. ns = 4882 ns)
(assuming the jitter frequency where DPLL attenuation is big), the LDT should be programmed to be (4882/15.2)
x 2 = 642 = 0282
H
Table 36 - Lock Detector Threshold Register (LDTR) Bits
Bit
Name
Description
15 - 0
LDI15 - 0
Lock Detector Interval Bits
The binary value of these bits defines the time interval that the output phase detector
must be below the lock detect threshold to declare lock. Unsigned representation of the
LDI bits is defined in 4 ms intervals.
Table 37 - Lock Detector Interval Register (LDIR) Bits
External Read/Write Address: 0047
H
Reset Value: 000F
H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LDT
15
LDT
14
LDT
13
LDT
12
LDT
11
LDT
10
LDT
9
LDT
8
LDT
7
LDT
6
LDT
5
LDT
4
LDT
3
LDT
2
LDT
1
LDT
0
External Read/Write Address: 0048
H
Reset Value: 2C00
H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LDI
15
LDI
14
LDI
13
LDI
12
LDI
11
LDI
10
LDI
9
LDI
8
LDI
7
LDI
6
LDI
5
LDI
4
LDI
3
LDI
2
LDI
1
LDI
0
相關(guān)PDF資料
PDF描述
ZL50019 Enhanced 2 K Digital Switch with Stratum 4E DPLL
ZL50019GAC Enhanced 2 K Digital Switch with Stratum 4E DPLL
ZL50019QCC Enhanced 2 K Digital Switch with Stratum 4E DPLL
ZL50022 Enhanced 4 K Digital Switch with Stratum 4E DPLL
ZL50022GAC Enhanced 4 K Digital Switch with Stratum 4E DPLL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ZL50018QCG1 制造商:Microsemi Corporation 功能描述:PB FREE 2K+ RATE CONVERSION AND S3 DPLL - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM SWITCH 2K-CH ENH 256LQFP
ZL50019 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Enhanced 2 K Digital Switch with Stratum 4E DPLL
ZL50019_06 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Enhanced 2 K Digital Switch with Stratum 4E DPLL
ZL50019GAC 制造商:Microsemi Corporation 功能描述:2K WITH RATE CONVERSION AND S4 - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM SWITCH 2K-CH ENH 256PBGA 制造商:Microsemi Corporation 功能描述:IC TDM SWITCH 2K-CH ENH 256PBGA
ZL50019GAG2 制造商:Microsemi Corporation 功能描述:PB FREE 2K WITH RATE CONVERSION+S4E DPLL 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 2K X 2K 1.8V/3.3V 256BGA - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM SWITCH 2K-CH ENH 256PBGA 制造商:Microsemi Corporation 功能描述:IC TDM SWITCH 2K-CH ENH 256PBGA
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