ELECTRICAL SPECIFICATIONS (continued)
TRANSMITTER SPECIFICATIONS FOR CMI INTERFACE
Bit Rate: 139.264Mbps ± 15ppm or 155.52Mbps ± 20ppm
Code: Coded Mark Inversion (CMI)
Relevant Specification: ITU-T G.703, Telcordia GR-253, ANSI T1.102
78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
With the coaxial output port driving a 75Ω load, the output pulses conform to the templates in Figures 11, 12,
13, and 14. These specifications are tested during production test. Consult application note for reference
schematic, layout guidelines, and recommended transformers.
PARAMETER
Peak-to-peak Output Voltage
(Fuse-trimmed to nominal target at
final test)
Rise/ Fall Time
CONDITION
Template, steady state
10-90%
MIN NOM MAX UNIT
0.9
1.05
1.1
V
2
ns
Negative Transitions
-0.1
0.1
Transition Timing Tolerance
Transmit clock frequency stability
(PIxCK or SIxCKP/N )
Positive Transitions at Interval
Boundaries
Positive Transitions at mid-
interval
With respect to CKREF
-0.5
-0.35
0
0.5
ns
0.35
0
ppm
The following specifications are not tested during production test. They are included for information only.
PARAMETER
Output Impedance
Return Loss
CONDITION
Driver is open drain
7MHz to 240MHz
MIN NOM MAX UNIT
1
MΩ
8
pF
15
dB
Page: 28 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4