參數(shù)資料
型號: IDT82P20516DBFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 56/115頁
文件大小: 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
標(biāo)準包裝: 84
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數(shù): 16
電源電壓: 1.8V, 3.3V
功率(瓦特): 2.89W
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 484-LFBGA
供應(yīng)商設(shè)備封裝: 484-CABGA(19x19)
包裝: 托盤
包括: AIS 警報檢測器和發(fā)生器,回送功能,PRBS 發(fā)生器 / 檢測器,遠程檢測器和發(fā)生器
IDT82P20516
16-CHANNEL SHORT HAUL E1 LINE INTERFACE UNIT
Functional Description
45
December 17, 2009
3.6
CLOCK INPUTS AND OUTPUTS
The IDT82P20516 provides two kinds of clock outputs:
Free running clock outputs on CLKE1
The following Clock Input is provided:
MCLK as programmable reference timing for the IDT82P20516.
3.6.1
FREE RUNNING CLOCK OUTPUTS ON CLKE1
An internal clock generator uses MCLK as reference to generate all
the clocks required by internal circuits and CLKE1 outputs. MCLK
should be a clock with +/-50 ppm (in E1 mode) accuracy. The clock
frequency of MCLK is 1.544/2.048 X N MHz (1
≤ N ≤ 8, N is an integer
number), as determined by MCKSEL[3:0]. Refer to Chapter 2 Pin
Description for details.
The outputs on CLKE1 are free running (locking to MCLK). The
output of CLKE1 is determined by the CLKE1_EN bit (b3, CLKG) and
the CLKE1 bit (b2, CLKG). Refer to Table-14.
Table-14 Clock Output on CLKE1
Control Bits
Clock Output On CLKE1
CLKE1_EN
CLKE1
0
(don’t-care)
High-Z
1
08 KHz
1
2.048 KHz
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