78P2352 Dual Channel OC-3/STM1-E/E4 Line Interface Unit
ELECTRICAL SPECIFICATIONS (continued)
CMI MODE LOSS OF SIGNAL CONDITION
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
LOS threshold
LOS timing
-35
10
-18
80
-15
255
dB
UI
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
75
1%
Ω
Transmitter Termination Resistor
75
1%
Ω
TRANSFORMER SPECIFICATIONS:
COMPONENT
Turns Ratio for the Receiver
VALUE
UNITS
1:1
TOLERANCE
Turns Ratio for the Transmitter (center-tapped)
1:1CT
Suggested Manufacturer: Halo, Tamura, MiniCircuits, Belfuse
THERMAL INFORMATION:
PACKAGE
CONDITIONS
Θ
( ˚C/W)
JA
No forced air;
4-layer JEDEC test board
Standard 128-pin JEDEC LQFP (78P2352-IGT
)
46
No forced air;
4-layer JEDEC test board;
Die attach pad soldered to PCB
Exposed Pad 128-pin JEDEC LQFP (78P2352-IEL
)
24.8
SCHEMATICS
For schematics, recommended transformer part numbers, etc. please check TDK Semiconductor's website or
contact your local sales representative for the latest application note(s) and/or demo board manuals.
37
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
