參數(shù)資料
型號: IDT82P20416DBFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 64/121頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
標準包裝: 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): 3.10W
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
IDT82P20416
16-CHANNEL SHORT HAUL T1/E1/J1 LINE INTERFACE UNIT
Functional Description
47
December 17, 2009
3.6
CLOCK INPUTS AND OUTPUTS
The IDT82P20416 provides two kinds of clock outputs:
Free running clock outputs on CLKT1 and CLKE1
The following Clock Input is provided:
MCLK as programmable reference timing for the IDT82P20416.
3.6.1
FREE RUNNING CLOCK OUTPUTS ON CLKT1/CLKE1
An internal clock generator uses MCLK as reference to generate all
the clocks required by internal circuits and CLKT1/CLKE1 outputs.
MCLK should be a clock with +/-32 ppm (in T1/J1 mode) or +/-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 CLKT1 and CLKE1 are free running (locking to
MCLK). The output of CLKT1 is determined by the CLKT1_EN bit (b1,
CLKG) and the CLKT1 bit (b0, CLKG). Refer to Table-21. The output of
CLKE1 is determined by the CLKE1_EN bit (b3, CLKG) and the CLKE1
bit (b2, CLKG). Refer to Table-22.
Table-21 Clock Output on CLKT1
Control Bits
Clock Output On CLKT1
CLKT1_EN
CLKT1
0
(don’t-care)
High-Z
1
08 KHz
1
1.544 KHz
Table-22 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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