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参数资料
型号： IDT82V2044EPFG
厂商： IDT, Integrated Device Technology Inc
文件页数： 17/73页
文件大小： 0K
描述： IC LIU T1/E1 QUAD SHORT 128-TQFP
标准包装： 15
类型： 线路接口装置（LIU）
规程： E1
电源电压： 3.13 V ~ 3.47 V
安装类型： 表面贴装
封装/外壳： 128-LQFP
供应商设备封装： 128-TQFP（14x20）
包装： 托盘
其它名称： 82V2044EPFG
24
INDUSTRIAL
TEMPERATURE RANGES
QUAD CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
3.5.2
AIS DETECTION
TheAlarmIndicationSignalcanbedetectedbytheIDT82V2044Ewhen
the Clock&Data Recovery unit is enabled. The status of AIS detection is
reflected in the AIS_S bit (STAT0, 14H...). In T1/J1 applications, the criteria
for declaring/clearing AIS detection are in compliance with the ANSI
T1.231. In E1 applications, the criteria for declaring/clearing AIS detection
comply with the ITU G.775 or the ETSI 300233, as selected by the LAC bit
(MAINT0, 0AH...). Table-15 summarizes different criteria for AIS detection
Declaring/Clearing.
Table-14 LOS Declare and Clear Criteria, Adaptive Equalizer Enabled
Control bit
LOS declare threshold
LOS clear threshold
Note
T1E1
LAC
LOS[4:0]
Q (dB)
1=T1/J1
0
T1.231
00000
00001
…
01010
01011 - 11111
-4
-6
…
-24
Reserved
Level < Q
N=175 bits
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeroes
1
-
00000
…
00110
-4
-16
Level < Q
N=1544 bits
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeroes
I.431 Level detect range is -18 to -30 dB.
I.431
00111
01010
01011 - 11111
-18
-24
Reserved
0=E1
0
-
00000
…
00010
-4
…
-8
Level < Q
N=32 bits
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeroes
G.775 Level detect range is -9 to -35 dB.
G.775
00011
…
01010
01011 - 11111
-10
…
-24
Reserved
1
-
00000
-4
Level < Q
N=2048 bits
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeroes
I.431 Level detect range is -6 to -20 dB.
I.431/
ETSI
00001
…
01010
01011 - 11111
-6
…
-24
Reserved
Table-15 AIS Condition
ITU G.775 for E1
(LAC bit is set to ‘0’ by default)
ETSI 300233 for E1
(LAC bit is set to ‘1’)
ANSI T1.231 for T1/J1
AIS
detected
Less than 3 zeros contained in each of two consecutive
512-bit streams are received
Less than 3 zeros contained in a 512-bit
stream are received
Less than 9 zeros contained in an 8192-bit stream
(a ones density of 99.9% over a period of 5.3ms)
AIS
cleared
3 or more zeros contained in each of two consecutive
512-bit streams are received
3 or more zeros contained in a 512-bit
stream are received
9 or more zeros contained in an 8192-bit stream
are received
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IDT82V2048 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
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IDT82V2048BBG 功能描述:IC LIU T1/E1 8CH SHORT 160-BGA RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR)
IDT82V2048DA 功能描述:IC LIU T1/E1 8CH SHORT 144-TQFP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR)
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