参数资料
| 型号： | XRT8000IP-F |
| 厂商： | Exar Corporation |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC WAN CLOCK E1/E1 DUAL 18PDIP |
| 产品变化通告： | XRT obsolescence 05/Mar/2012 |
| 标准包装： | 41 |
| 类型： | 时钟/频率发生器，同步器，多路复用器 |
| PLL： | 无 |
| 主要目的： | 电信 |
| 输入： | 时钟 |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:2 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 2.048MHz |
| 电源电压： | 3.135 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 18-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 18-PDIP |
| 包装： | 管件 |
September 2006
XRT8000
Clock Synchronizer/Adapter for
Communications
Rev.1.11
E
1999--2006
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 z www.exar.com
FEATURES
D
Clock Adaptation for Most Popular
Telecommunication Frequencies
D
Wide Input Frequency Range
D
Programmable Output Frequencies
D
Less than 0.05UI Wide Band Output Jitter
D
Low Power Operation (5V and 3.3V)
D
Maximum Lock Time of 45mS
D
Cascadable
D
No External Components Needed
D
Lock Detect Indication Pin
APPLICATIONS
D
DSU’s, CSU’s and Access Equipment
D
ISDN Terminals
D
Concentrators and Multiplexers
GENERAL DESCRIPTION
The XRT8000 is a dual phase-locked loop chip that
generates two simultaneous, very low jitter, output clocks
for synchronization applications in wide area networking
systems. The outputs are phase locked to the input
signal. The chip has four basic modes of operation;
referred to as master (FORWARD, REVERSE) and slave
(FORWARD, REVERSE) modes (See Figure 1). In the
FORWARD mode it accepts up to 16th harmonic of either
1.544MHz or 2.048MHz as input reference and generates
1.2kHz and multiples of 2.4kHz, 56kHz or 64kHz. In the
REVERSE mode an input clock of 56kHz or 64kHz is used
to generate 1.544MHz or 2.048MHz output clocks. The
SLAVE (FORWARD, REVERSE) modes generate the
same output frequencies as the MASTER (FORWARD/
REVERSE MODES) except that the input frequency (FIN)
is 8kHz. An optional divide by eight can be enabled at
each of the outputs.
The input and output frequency selection can be done
through a serial microprocessor interface. The XRT8000
is available in either 18 pin SOIC package or 18 pin plastic
DIP.
ORDERING INFORMATION
Part No.
Package
Operating Temperature
Range
XRT8000IP
18 Lead 300 Mil PDIP
-40°C to +85°C
XRT8000ID
18 Lead 300 Mil JEDEC SOIC
-40°C to +85°C
n x 1.544{T1}
n x 2.048{E1}
1 <= n <= 16
K x 56kHz
K x 64kHz
1.2kHz
2.4 x K
to
43.2kHz
1 <= K <= 32
MASTER FORWARD
T1 (1.544)
E1 (2.048)
56kHz
64kHz
MASTER REVERSE
8kHz
B
A/ B
A
Figure 1. System Diagram
1 <= K <= 18
XRT8000
FIN
CLK2
CLK1
SYNC 8kHz
SLAVE
FORWARD/REVERSE
or
SYNC
相关PDF资料 |
PDF描述 |
|---|---|
| XRT8001IP-F | IC WAN CLOCK E1/E1 DUAL 18PDIP |
| XRT8010IL-F | IC CLK MULTIPLR LVDS 16QFN |
| XRT8020IL-F | IC CLK MULTIPLR LVDS 16QFN |
| XRT91L31IQ | IC TXRX SONET/SDH 8BIT 64QFP |
| XRT91L33IG-F | IC MULTIRATE CDR 20TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT8001 | 制造商:EXAR 制造商全称:EXAR 功能描述:WAN Clock for T1 and E1 Systems |
| XRT8001ES | 功能描述:锁相环 - PLL WAN CLOCK RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| XRT8001ID | 制造商:Exar Corporation 功能描述:WAN Clock 18-Pin SOIC W |
| XRT8001ID-F | 功能描述:锁相环 - PLL 3.3V-5V temp -45 to 85C RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| XRT8001ID-F | 制造商:Exar Corporation 功能描述:WAN Clock IC |
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