82V2044EPFG8 IDT, Integrated Device Technology Inc, 82V2044EPFG8 Datasheet - Page 24
82V2044EPFG8
Manufacturer Part Number
82V2044EPFG8
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82V2044EPFG8.pdf
(73 pages)
Specifications of 82V2044EPFG8
Screening Level
Industrial
Mounting
Surface Mount
Package Type
TQFP
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Lead Free Status / RoHS Status
Compliant
QUAD CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
Table-14 LOS Declare and Clear Criteria, Adaptive Equalizer Enabled
3.5.2
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
Table-15 AIS Condition
detected
cleared
The Alarm Indication Signal can be detected by the IDT82V2044E when
1=T1/J1
AIS
AIS
T1E1
0=E1
AIS DETECTION
Less than 3 zeros contained in each of two consecutive
512-bit streams are received
3 or more zeros contained in each of two consecutive
512-bit streams are received
0
1
0
1
LAC
(LAC bit is set to ‘0’ by default)
T1.231
G.775
I.431/
I.431
ETSI
Control bit
-
-
-
ITU G.775 for E1
00000
00001
…
01010
01011 - 11111
00000
…
00110
00111
01010
01011 - 11111
00000
…
00010
00011
…
01010
01011 - 11111
00000
00001
…
01010
01011 - 11111
LOS[4:0]
-4
-6
…
-24
Reserved
-16
-18
-24
Reserved
-4
…
-8
-10
…
-24
Reserved
-6
…
-24
Reserved
-4
-4
Q (dB)
Level < Q
N=175 bits
Level < Q
N=1544 bits
Level < Q
N=32 bits
Level < Q
N=2048 bits
LOS declare threshold
Less than 3 zeros contained in a 512-bit
stream are received
3 or more zeros contained in a 512-bit
stream are received
(LAC bit is set to ‘1’)
24
ETSI 300233 for E1
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...).
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-15
Less than 9 zeros contained in an 8192-bit stream
(a ones density of 99.9% over a period of 5.3ms)
9 or more zeros contained in an 8192-bit stream
are received
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.
ANSI T1.231 for T1/J1
TEMPERATURE RANGES
Note
INDUSTRIAL