78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
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
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
CONDITION
MIN
NOM
MAX
UNIT
Peak-to-peak Output Voltage
Template, steady state
0.9
1.05
1.1
V
(Fuse-trimmed to nominal target at
final test)
Rise/ Fall Time
10-90%
2
ns
Negative Transitions
-0.1
-0.5
0.1
Positive Transitions at Interval
0.5
Transition Timing Tolerance
ns
Boundaries
Positive Transitions at mid-
interval
-0.35
0
0.35
Transmit clock frequency stability
(PIxCK or SIxCKP/N )
With respect to CKREF
0
ppm
The following specifications are not tested during production test. They are included for information only.
PARAMETER
Output Impedance
Return Loss
CONDITION
MIN
NOM
1
8
MAX
UNIT
MΩ
pF
Driver is open drain
7MHz to 240MHz
15
dB
Page: 28 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
