參數(shù)資料
型號(hào)： IDT82V2081PPG
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 18/68頁(yè)
文件大?。?/td> 0K
描述： IC LIU T1/J1/E1 1CH 44-TQFP
標(biāo)準(zhǔn)包裝： 80
類型： 線路接口裝置（LIU）
規(guī)程： T1/E1/J1
電源電壓： 3.13 V ~ 3.47 V
安裝類型： 表面貼裝
封裝/外殼： 44-LQFP
供應(yīng)商設(shè)備封裝： 44-TQFP（10x10）
包裝： 托盤
其它名稱： 800-2347
82V2081PPG
IDT82V2081PPG-ND
25
INDUSTRIAL
TEMPERATURE RANGES
SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
3.6.2
AIS DETECTION
The Alarm Indication Signal can be detected by the IDT82V2081 when
the Clock & Data Recovery unit is enabled. The status of AIS detection is
reflected in the AIS_S bit (STAT0, 17H). 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, 0DH). Table-19 summarizes different criteria for AIS detection
Declaring/Clearing.
Table-18 LOS Declare and Clear Criteria for Long Haul Mode
Control bit
LOS declare threshold
LOS clear threshold
Note
T1E1
LAC
LOS[4:0]
Q (dB)
1=T1/J1
0
T1.231
00000
00001
…
10001
…
10101
10110-11111
-4
-6
…
-38
…
-46
-48
Level < Q
N=175 bits
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeros
1
-
00000
…
00110
-4
-16
Level < Q
N=1544 bits
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeros
I.431 Level detect range is -18 to -30 dB
I.431 00111
…
01101
-18
…
-30
-
01110
…
10001
…
10101
10110-11111
-32
…
-38
…
-46
-48
0=E1
0
-
00000
…
00010
-4
…
-8
Level < Q
N=32 bits
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeros
G.775 Level detect range is -9 to -35 dB
G.775
00011
…
10000
-10
…
-36
-
10001
…
10101(default)
10110-11111
-38
…
-46
-48
1
-
00000
-4
Level < Q
N=2048 bits
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeros
I.431 Level detect range is -6 to -20 dB
I.431/
ETSI
00001
…
01000
-6
…
-20
-
01001
…
10101(default)
10110-11111
-22
…
-46
-48
Table-19 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 5.3 ms)
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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IDT82V2082BFG 功能描述:IC LIU T1/E1/J1 2CH 81BGA RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
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