82V2048LDA IDT, Integrated Device Technology Inc, 82V2048LDA Datasheet - Page 17

• Manufacturer Part Number: 82V2048LDA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V2048LDA

• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
2.4.6.3 EXZ AND BPV DETECTION IN B8ZS
tution of a unique code to replace occurrences of eight consecutive zero
signal elements. Each block of eight successive zeros is replaced by
000VB0VB, where B represents an inserted non-zero signal element,
and V represents an inserted non-zero signal element that is a bipolar
violation.
same polarity as the previous non-zero signal element. in normal B8ZS
line coding for 8 contiguous zeros, two BPV signals are deliberately
inserted. BPV in this case is not an error. Therefore, data and error
B8ZS (Binary 8 Zero Substitution) is an AMI line code with the substi-
Bipolar violation (BPV) is a non-zero signal element that has the
RCLKn
RRINGn
RTIPn
RDn
CVn
RCLKn
RRINGn
RTIPn
RDn
CVn
1
0
1
0
0
Figure-9 HDB3 Code Violations & Two BPV Detections
2
V
Figure-8 HDB3 Code Violation & Excessive Zeros
4 consecutive zeros
B
1
0
1
0
V
3
2
2
V
4
Excessive zeros detected
3
4
5
17
0
pulses will not appear on RDn and CVn pins in this BPV case. Some-
times, a BPV occurs as a result of transmission line noise or interfer-
ence. As such, it is an error and should be detected and reported.
of any zero-string length greater than seven contiguous zeros.
‘5’) in the input data pattern are treated as individual code violations:
they are recovered as data bits in RD signal line and a BPV is detected
for each of the three violated pulses.
V
3
0
An excessive zeros (EXZ) for a B8ZS-coded signal is the occurrence
As shown in Figure-11, all three bipolar violations (pulse ‘2’, ‘4’ and
2
4
0
3
Code violation
V
4
0
5
V
0
5
0
6
Code violation detected
INDUSTRIAL TEMPERATURE RANGES
V
6
V
7
5
V
6
6
7