78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
ELECTRICAL SPECIFICATIONS (continued)
CMI MODE LOSS OF SIGNAL CONDITION
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
Combination of cable loss at 78MHz
and flat loss
LOS threshold
LOS timing
-35
10
-19
-15
dB
UI
110
255
Nominal value
Maximum
cable loss
3 dB
Loss of Signal must be cleared
15dB
35dB
Tolerance range
LOS can be detected or cleared
Loss of Signal must be declared
APPLICATION INFORMATION
EXTERNAL COMPONENTS:
COMPONENT
PIN(S)
VALUE
UNITS
TOLERANCE
RXxP
RXxN
CMIxP
CMIxN
Receiver Termination Resistor, CMI Mode
75
1%
Ω
Transmitter Termination Resistor, CMI Mode
75
1%
Ω
(CMI) TRANSFORMER SPECIFICATIONS:
COMPONENT
Turns Ratio for the Receiver
VALUE
UNITS
1:1
TOLERANCE
Turns Ratio for the Transmitter (center-tapped)
1:1CT
Suggested Manufacturers: Halo, Tamura, MiniCircuits, Belfuse
THERMAL INFORMATION:
PACKAGE
CONDITIONS
Θ
JA ( ˚C/W)
No forced air;
4-layer JEDEC test board
46
Standard 128-pin JEDEC LQFP (78P2352-IGT)
No forced air;
4-layer JEDEC test board;
Die attach pad soldered to PCB
(Recommended) Thernally enhanced
Exposed Pad 128-pin JEDEC LQFP (78P2352-IEL)
24.8
SCHEMATICS
For reference schematics, layout guidelines, recommended transformer part numbers, etc. please check Teridian
Semiconductor's website or contact your local sales representative for the latest application note(s) and/or demo
board manuals.
Page: 38 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
