參數(shù)資料
型號(hào): ORT82G5
英文描述: ORCA ORT82G5 1.0.1-25/2.0-2.5/3.125 Gbits/s Backplane Interface FPSC
中文描述: ORCA的ORT82G5 1.0.1-25/2.0-2.5/3.125 Gb /秒背板接口促進(jìn)文化基金
文件頁(yè)數(shù): 55/92頁(yè)
文件大小: 1823K
代理商: ORT82G5
Agere Systems Inc.
55
Preliminary Data Sheet
July 2001
1.0-1.25/2.0-2.5/3.125 Gbits/s Backplane Interface
ORCA
ORT82G5 FPSC Eight-Channel
HSI Electrical and Timing Characteristics
(continued)
2391(F)
Figure 19. Receive Data Eye-diagram Template (Differential)
Figure 19 provides a graphical characterization of the SERDES receiver input requirements. It provides guidance
on a number of input parameters, including signal amplitude and rise time lints, noise and jitter limits, and P and N
input skew tolerance. it is believed that incoming data patterns falling within the shaded region of the template will
be received without error (BER < 10E-12).
Data pattern eye-opening at the receive end of a link is considered the ultimate measures of received signal qual-
ity. Almost all detrimental characteristics of transmit signal and the interconnection link design result in eye-closure.
This combined with the eye-opening limitations of the line receiver can provide a good indication of a links ability to
transfer data error-free.
Signal jitter is of special interest to system designers. It is often the primary limiting characteristic of long digital
links and of systems with high noise level environments. An interesting characteristic of the clock and data recov-
ery (CDR) portion of the ORT82G5 SERDES receiver is its ability to filter incoming signal jitter that is below the
clock recover bandwidth (estimated to be about 3 MHz). For signals with high levels of low frequency jitter the
receiver can detect incoming data, error-free, with eye-openings significantly less than that of Figure 19. This phe-
nomena has been observed in the laboratory.
Eye-diagram measurement and simulation are excellent tools of design. They are both highly recommended when
designing serial link interconnections and evaluating signal integrity.
Table 17. Receiver Specifications
Parameter
Conditions
Min
Typ
Max
Unit
Input Data
Stream of Nontransitions
Phase change, Input Signal
Eye Opening
Jitter Tolerance
0.4
60
TBD
bits
ps
U
IP-P
U
IP-P
TBD
0.4UI
200 mV @
1.0
2.5 GBits/s,
350 mV @
3.125 GBits/s
1.2 V
UI
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