IDT82P5088BBG IDT, Integrated Device Technology Inc, IDT82P5088BBG Datasheet - Page 29

• Manufacturer Part Number: IDT82P5088BBG
• Description: IC LIU T1/E1/J1 OCTAL 256PBGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT82P5088BBG

• Includes: Integrated Clock Adapter
• Function: Line Interface Unit (LIU)
• Interface: E1, J1, T1
• Number Of Circuits: 8
• Voltage - Supply: 1.8V, 3.3V
• Power (watts): 2.57W
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 256-BBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

Table-20 LOS Declare and Clear Criteria for Long Haul Mode
3.3.12.2AIS DETECTION
the Clock&Data Recovery unit is enabled. The status of AIS detection is
reflected in the AIS_S bit (STAT0, 36H...). In T1/J1 applications, the criteria
for declaring/clearing AIS detection are in compliance with the ANSI
FUNCTIONAL DESCRIPTION
IDT82P5088
The Alarm Indication Signal can be detected by the IDT82P5088 when
TEMODE
1=T1/J1
0=E1
0
1
0
1
LAC
T1.231
G.775
I.431/
I.431 00111
ETSI
Control bit
-
-
-
-
-
-
00000
00001
…
10001
…
10101
10110-11111
00000
…
00110
…
01101
01110
…
10001
…
10101
10110-11111
00000
…
00010
00011
…
10000
10001
…
10101(default)
10110-11111
00000
00001
…
01000
01001
…
10101(default)
10110-11111
LOS[4:0]
-4
-6
…
-38
…
-46
-48
-16
-18
…
-30
-32
…
-38
…
-46
-48
-4
…
-8
-10
…
…
-6
…
-20
…
-4
-36
-38
-46
-48
-4
-22
-46
-48
Q (dB)
Level < Q
N=175 bits
Level < Q
N=1544 bits
Level < Q
N=32 bits
Level < Q
N=2048 bits
UNIVERSAL OCTAL T1/E1/J1 LIU WITH INTEGRATED CLOCK ADAPTER
LOS declare threshold
29
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
(MAINT1,2CH...).
Declaring/Clearing.
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeroes
Level > Q+ 4dB
M=128 bits
12.5% mark density
<100 consecutive zeroes
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeroes
Level > Q+ 4dB
M=32 bits
12.5% mark density
<16 consecutive zeroes
LOS clear threshold
Table-21
summarizes different criteria for AIS detection
I.431 Level detect range is -18 to -30 dB.
G.775 Level detect range is -9 to -35 dB.
I.431 Level detect range is -6 to -20 dB.
Note
February 5, 2009