82V2042EPF8 IDT, Integrated Device Technology Inc, 82V2042EPF8 Datasheet - Page 31
82V2042EPF8
Manufacturer Part Number
82V2042EPF8
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82V2042EPF8.pdf
(83 pages)
Specifications of 82V2042EPF8
Screening Level
Industrial
Mounting
Surface Mount
Package Type
TQFP
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Lead Free Status / RoHS Status
Not Compliant
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3.6.2
the Clock & Data Recovery unit is enabled. The status of AIS detection is
reflected in the AIS_S bit (STAT0, 16H...). In T1/J1 applications, the criteria
for declaring/clearing AIS detection are in compliance with the ANSI
Table-15 AIS Condition
FUNCTIONAL DESCRIPTION
IDT82V2042E
detected
cleared
The Alarm Indication Signal can be detected by the IDT82V2042E when
AIS
AIS
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
(LAC bit is set to ‘0’ by default)
ITU G.775 for E1
Less than 3 zeros contained in a 512-bit
stream are received
3 or more zeros contained in a 512-bit
stream are received
DUAL CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
(LAC bit is set to ‘1’)
ETSI 300233 for E1
31
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, 0CH...).
Declaring/Clearing.
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
ANSI T1.231 for T1/J1
December 12, 2005
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