82V2042EPF8 IDT, Integrated Device Technology Inc, 82V2042EPF8 Datasheet - Page 31

• Manufacturer Part Number: 82V2042EPF8
• Manufacturer: IDT, Integrated Device Technology Inc

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

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