78P2351
Single Channel
OC-3/ STM1-E/ E4 LIU
ELECTRICAL SPECIFICATIONS (continued)
TRANSMITTER SPECIFICATIONS FOR CMI INTERFACE
Bit Rate: 139.264 Mbps ± 15ppm or 155.52 Mbps ± 20ppm
Code: Coded Mark Inversion (CMI)
Relevant Specifications: 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 12, 13, 14
and 15. 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
(PICK or SICKP/N )
With respect to CKREF
0
ppm
The following specifications are not tested during production test. They are included for information only.
PARAMETER
CONDITION
MIN
NOM
MAX
UNIT
1
8
MΩ
pF
Output Impedance
Driver is open drain
Return Loss
7MHz to 240MHz
15
dB
Page: 29 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
