Figure - 5 Reference Switch wi" />
參數(shù)資料
型號: IDT82V3010PVG8
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 4/31頁
文件大小: 0K
描述: IC PLL WAN 51/E1/OC3 DUAL 56SSOP
標(biāo)準(zhǔn)包裝: 1,000
類型: 時鐘/頻率發(fā)生器,多路復(fù)用器
PLL:
主要目的: 電信
輸入: 時鐘
輸出: CMOS,LVDS,TTL
電路數(shù): 1
比率 - 輸入:輸出: 2:12
差分 - 輸入:輸出: 無/是
頻率 - 最大: 32.768MHz
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 56-BSSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 56-SSOP
包裝: 帶卷 (TR)
其它名稱: 82V3010PVG8
IDT82V3010
T1/E1/OC3 Telecom Clock Generator with Dual Reference Inputs
Functional Description
12
Feberuary 20, 2009
Figure - 5 Reference Switch with TIE Control Block Enabled
Figure - 6 Reference Switch with TIE Control Block Disabled
2.7
DPLL BLOCK
As shown in Figure - 7, the DPLL Block consists of a Phase Detector,
a Limiter, a Loop Filter, a Digital Control Oscillator and Divider.
2.7.1
PHASE DETECTOR (PHD)
In the Normal mode, the Phase Detector compares the virtual
reference signal from the TIE Control Circuit with the feedback signal
from the Frequency Select Circuit, and outputs an error signal
corresponding to the phase difference. This error signal is sent to the
Limiter circuit for phase slope control.
In the Freerun or Holdover mode, the Frequency Select Circuit, the
Phase Detector and the Limiter are inactive, and the input reference
signal is not used.
2.7.2
LIMITER
The Limiter is used to limit the phase slope. It ensures that the
maximum output phase slope is limited to 5 ns per 125 s for all input
transient conditions. This well meets the AT&T TR62411specification
which specify the maximum phase slope of 7.6 ns per 125 s.
Input Clock
Ref1
Ref2
Time = 0.00 s
Time = 0.25 s
Time = 0.50 s
Time = 0.75 s
Time = 1.0 s
Time = 1.25 s
Time = 1.50 s
Time = 1.75 s
Output Clock
Input Clock
Ref1
Ref2
Time = 0.00 s
Time = 0.25 s
Time = 0.50 s
Time = 0.75 s
Time = 1.0 s
Time = 1.25 s
Time = 1.50 s
Time = 1.75 s
Output Clock
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