82P2281PFG IDT, Integrated Device Technology Inc, 82P2281PFG Datasheet - Page 30

• Manufacturer Part Number: 82P2281PFG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2281PFG

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

IDT82P2281
3.7.3
sity of the received signal. When the received signal is below an ampli-
tude for continuous intervals, the LOS is detected. When the received
signal is above the amplitude and the density of marks meets the
requirement, the LOS is cleared.
Table 9 and Table 10. In T1/J1 mode, the LOS detection supports ANSI
T1.231 and I.431. In E1 mode, the LOS detection supports ITU-T G.775
and I.431. The criteria are selected by the LAC bit.
Functional Description
The Loss of Signal (LOS) Detector monitors the amplitude and den-
The different criteria for LOS Declaring/Clearing are illustrated in
LOS DETECTION
RRING
clock
RTIP
clock
RRING
RTIP
1
RRING
clock
RTIP
1
2
Figure 10. HDB3 Code Violation & Excessive Zero Error
2
3
1
Excessive zero
4 consecutive
zeros
2
Figure 9. B8ZS Excessive Zero Error
Figure 8. AMI Bipolar Violation Error
3
4
3
4
5
4
5
Bipolar violation
30
Excessive zero
8 consecutive
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Selected by the LOS_IES bit, a transition from '0' to '1' on the LOS_S bit
or any transition (from ‘0’ to ‘1’ or from ‘1’ to ‘0’) on the LOS_S bit will set
the LOS_IS bit to ‘1’. When the LOS_IS bit is ‘1’, an interrupt will be
reported by the INT pin if enabled by the LOS_IE bit.
to the received data stream.
V
zeros
When the LOS is detected, it will be indicated by the LOS_S bit.
During LOS, if the RAISE bit is set to ‘1’, all ’One’s will be inserted
Code violation
V
6
V
5
6
7
6
7
8
9
August 20, 2009