82V2048LDA IDT, Integrated Device Technology Inc, 82V2048LDA Datasheet - Page 17
82V2048LDA
Manufacturer Part Number
82V2048LDA
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82V2048LDA.pdf
(62 pages)
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