参数资料
| 型号： | ACS8944T |
| 厂商： | Semtech |
| 文件页数： | 24/24页 |
| 文件大小： | 0K |
| 描述： | IC JITTER ATT MULT PLL 48-QFN |
| 标准包装： | 1 |
| 类型： | 时钟/频率发生器，多路复用器 |
| PLL： | 是 |
| 主要目的： | SONET/SDH |
| 输入： | LVPECL |
| 输出： | LVPECL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 155.52MHz |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 管件 |
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 3/November 2006 Semtech Corp.
Page 9
www.semtech.com
ACS8944 JAM PLL
Figure 9 Lock Filter Components
The filtering components are external so that the time to
indicate lock or not locked can be optimized for the
application. The output indicates both phase and
frequency lock. During off-frequency conditions the
LOCKB output will be predominately high in its PWM
generation with the filtered version giving a constant high
state.
Applications
The ACS8944 is targeted at applications requiring clock
cleaning at 19.44 MHz, 38.88 MHz, 77.76 MHz or
155.52 MHz where input jitter is filtered out or attenuated
at frequencies above the ACS8944 PLL bandwidth. It also
performs the function of a clock multiplying unit (CMU)
translating any one of these input frequencies to any one
of 19.44 MHz, 38.88 MHz, 77.76 MHz or 155.52 MHz
output frequencies.
The ACS8944 can save space when compared with
discrete analog + VCXO solutions or module-based
solutions. In the example in Figure 10 the ACS8944 is
shown symbolically as a low cost line card dejittering
device. The ACS8944 carries out the appropriate
frequency multiplication for onward distribution as
required by the line card.
Figure 10 Typical Application
LOCKB
JA
M
P
L
R3
470K
LOCK_B
C5
220nF
GND
F8944_011Lockfilter_03
Multiple Line cards
Primary Ref.
Input/
output
Master Sync Card
Slave Sync Card
mP/Serial Bus
SSM
Priorities
TCLK
CLK
SEC
DATA
Priorities
Config.
Input CLK Sources
Line
I/F
Unit
SetsLinecardGenApp_08
To/from
SONET/SDH/PDH
Network
FRAMER
SERDES
Line Card (0C-12)
Master Clock
Recovered Clock
Master Sync
Slave Clock
Slave Sync
Stand-by Clock
Stand-by Sync
Backplane
Low Jitter/Low Skew
Low Jitter up to 155.52 MHz
Frame Sync
Multi Frame Sync
E1/DS1
LINE
CARD
PROTECTION
SETS
Output
CLKs
ACS8515
ACS8525
ACS8526
ACS8527
ACS8944
JAM PLL
ACS8510
ACS8520
ACS8522
ACS8530
Clock
Distribution
Clock
Distribution
SSM Processing
相关PDF资料 |
PDF描述 |
|---|---|
| ACS8946T | IC JITTER ATT MULT PLL 48-QFN |
| ACS8947T | IC JITTER ATT MULT PLL 48-QFN |
| AD10200BZ | IC ADC DUAL 12BIT 68-CLCC |
| AD10242BZ | IC ADC DUAL 12BIT 68-CLCC |
| AD10465BZ | IC ADC DUAL 14BIT 68-CLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ACS8946 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Jitter Attenuating, Multiplying Phase Locked Loop, with Protection Switch, for OC-12/STM-4 and GbE |
| ACS8946EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Jitter Attenuating, Multiplying Phase Locked Loop, with Protection Switch, for OC-12/STM-4 and GbE |
| ACS8946T | 功能描述:IC JITTER ATT MULT PLL 48-QFN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ACS8947T | 功能描述:IC JITTER ATT MULT PLL 48-QFN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ACS9010 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
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