参数资料
型号: IDT82V3355TFG8
厂商: IDT, Integrated Device Technology Inc
文件页数: 46/135页
文件大小: 0K
描述: IC PLL WAN SYNC ETH 64-TQFP
标准包装: 1,250
类型: 时钟/频率发生器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH,Stratum
输入: CMOS,LVDS,PECL
输出: CMOS,LVDS,PECL
电路数: 1
比率 - 输入:输出: 3:2
差分 - 输入:输出: 是/是
频率 - 最大: 622.08MHz
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-TQFP(10x10)
包装: 带卷 (TR)
其它名称: 82V3355TFG8
IDT82V3355
SYNCHRONOUS ETHERNET WAN PLL
Functional Description
18
May 19, 2009
3.3
INPUT CLOCKS & FRAME SYNC SIGNALS
Altogether 5 clocks and 3 frame sync signals are input to the device.
3.3.1
INPUT CLOCKS
The device provides 5 input clock ports.
According to the input port technology, the input ports support the fol-
lowing technologies:
PECL/LVDS
CMOS
According to the input clock source, the following clock sources are
supported:
T1: Recovered clock from STM-N or OC-n
T2: PDH network synchronization timing
T3: External synchronization reference timing
IN1_CMOS ~ IN3_CMOS support CMOS input signal only and the
clock sources can be from T1, T2 or T3.
IN1_DIFF and IN2_DIFF support PECL/LVDS input signal and auto-
matically detect whether the signal is PECL or LVDS. The clock sources
can be from T1, T2 or T3.
For SDH and SONET networks, the default frequency is different.
SONET / SDH frequency selection is controlled by the IN_SONET_SDH
bit. During reset, the default value of the IN_SONET_SDH bit is deter-
mined by the SONET/SDH pin: high for SONET and low for SDH. After
reset, the input signal on the SONET/SDH pin takes no effect.
IDT82V3355 supports single-ended input for differential input. Refer
3.3.2
FRAME SYNC INPUT SIGNALS
Three 2 kHz, 4 kHz or 8 kHz frame sync signals are input on the
EX_SYNC1 to EX_SYNC3 pins respectively. They are CMOS inputs.
The input frequency should match the setting in the SYNC_FREQ[1:0]
bits.
Only one of the three frame sync input signals is used for frame sync
output signal synchronization. Refer to Chapter 3.13.2 Frame SYNC
Output Signals for details.
Table 3: Related Bit / Register in Chapter 3.3
Bit
Register
Address (Hex)
IN_SONET_SDH
INPUT_MODE_CNFG
09
SYNC_FREQ[1:0]
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