78P2351R
Serial 155M
NRZ to CMI Converter
ELECTRICAL SPECIFICATIONS (continued)
RECEIVER SPECIFICATIONS FOR CMI INTERFACE (Transformer-coupled)
Consult application notes for reference schematic, layout guidelines, and recommended transformers.
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
Peak Differential Input
MON=0. 12.7dB of cable loss
70
550
mVpk
Amplitude, RXP and RXN
Peak Differential Input
MON=1. 20dB flat loss with 6dB
cable loss (max)
25
-2
80
4
mVpk
dB
Amplitude, RXP and RXN
Flat-loss Tolerance
MON=0. All valid cable lengths.
Latency
PLL Lock Time
Return Loss
5
1
10
10
UI
µs
dB
7MHz to 240MHz
15
The input signal is assumed compliant with ITU-T G.703 and can be attenuated by the dispersive loss of a
cable. The minimum cable loss is 0dB and the maximum is –12.7dB at 78MHz.
The “Worst Case” line corresponds to the ITU-T G.703 recommendation. The “Typical” line corresponds to a
typical installation referred to in ANSI T1.102-1993. The receiver is tested using the cable model. It is a lumped
element approximation of the “Worst Case” line.
30
25
20
15
10
5
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
1.00E+09
Frequency (Hz)
Worst Case
Typical
Figure 10: Typical and worst-case Cable attenuation
Page: 25 of 31
2006 Teridian Semiconductor Corporation
Rev. 2.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
