LC-155Axxxxxx
155Mbps 2x5 SFF LC Duplex Optical Transceiver Module for
Fast Ethernet, ATM, SONET/SDH STM-1/OC-3
Features：
Full Compliance with the Optical Performance
Requirements of the ATM 100Mbps and 100
Base-FX Version of IEEE 802.3u.
Industry Standard 2x5 Footprint and Duplex
LC Connector Interface.
3.3V Power Supply.
PECL Differential Inputs and Outputs.
PECL（LC-155A2 Series）or TTL（LC-155A4
Series）Receiver Signal Detect Indicator.
Wave Solder and Aqueous Wash Process
Compatible.
RoHS Compliant per Directive 2002/95/EC
Description：
The LC-155Axxxxxx series are 2x5 optical
transceiver modules designed expressly for
high-speed communication applications that require
rates of up to 155Mbps. They are all compliant with
the SONET/SDH standards.
The LC-155Axxxxxx transceivers are supplied in
industry standard 2x5 footprint and duplex LC
connector.
The LC-155Axxxxxx series meet Class-1 eye safety
standard and effective distance up to 2Km.
The transmitter sections utilize 1310nm Surface
Emitting InGaAsP LEDs. These LEDs are packaged
in the optical subassembly portion of the transmitter
section. A custom silicon IC that converts differential
PECL logical signals into an analog LED driving
current then drive it.
The receiver sections utilize InGaAs PIN
photodiodes coupled into a custom silicon
transimpedance preamplifier IC. These are
packaged in the optical subassembly portion of
receiver.
These PIN / Preamplifier combinations are coupled
into a custom quantizer IC which provides the final
pulse shaping for the logic output and the Signal
Detect function. The data output is differential. The
signal detect output is single-ended.
Application：
Multimode Fiber Backbone Links.
Fast Ethernet and ATM Compatible.
Multimode Fiber Media Converter.
www.deltaww.com
DELTA ELECTRONICS, INC.
1
Aug., 2006
Rev.：0E
LC-155Axxxxxx
Absolute Maximum Ratings
Parameter
Storage Temperature
Lead Soldering Temperature
Lead Soldering Time
Supply Voltage
Symbol
Ts
T
SOLD
t
SOLD
V
CC
Min.
-40
Typ.
Max.
85
260
10
5
Unit
ºC
ºC
Sec.
V
Note
0
Recommended Operating Conditions
Parameter
Data Rate
Ambient Operating Temperature
Supply Voltage
Note: See ordering information for detail
Symbol
T
A
V
CC
Min.
0
3.15
Typ.
155.52
Max.
70
3.45
Unit
Mbps
ºC
V
Note
Electrical Characteristics
Parameter
Transmitter
Transmitter Data Input Voltage-Low
Transmitter Data Input Voltage-High
Transmitter Disable Input-High
Transmitter Disable Input-Low
Receiver
Data Output Voltage-Low
Data Output Voltage-High
SD Output Voltage-Low
SD Output Voltage-High
SD Output Voltage-Low
SD Output Voltage-High
Symbol
V
IL
-V
CC
V
IH
-V
CC
V
DISH
V
DISL
V
OL
-V
CC
V
OH
-V
CC
V
SDH
-V
CC
V
SDL
-V
CC
V
SDH
-V
CC
V
SDL
-V
CC
Min.
-1.81
-1.16
2
0
-1.95
-1.045
-1.95
-1.05
2
Typ.
Max.
-1.48
-0.88
V
CC
+0.3
0.8
-1.62
-0.74
-1.62
-0.74
0.8
Unit
V
V
V
V
V
V
V
V
V
V
Note
ECL Family
LVTTL
Optical Characteristics
（Data
Rate = 155.52Mbps, PRBS=2
23
-1, NRZ, 62.5/125um MMF）
Parameter
Symbol
Min.
Typ.
Max.
Unit
Note
Transmitter
Supply Current
Icc
mA
185
Mean Launch Power
P
O
-20
-14
dBm
Optical Extinction Ratio
E.R.
9
dB
λ
C
1280
1310
1340
nm
Center Wavelength
σ
Spectral Width (RMS)
nm
200
10%½90%
Optical Risetime / Falltime
t
r
/t
f
3.0
ns
Output Eye Diagram
Compliant with ITU-T recommendation G.957
Receiver
Supply Current
Icc
mA
145
Sensitivity
Input Optical Wavelength
Signal Detect-Asserted
Signal Detect-DeAsserted
Signal Detect-Hysteresis
P
IN
λ
P
A
P
D
P
A
-P
D
1100
-45
0.5
-31
1600
-31
dBm
nm
dBm
dBm
dB
1
Overload
P
O
-14
dBm
Notes：
1. The sensitivity should be tested at BER of 1×10
-10
or better with an input signal consisting of 155Mb/s, NRZ,
www.deltaww.com
DELTA ELECTRONICS, INC.
2
Aug., 2006
Rev.：0E
LC-155Axxxxxx
PRBS=2
23
-1 and E.R.= 9dB.
Mask of the eye diagram for the optical transmit signal
Pin Definition：
PIN (2X5)
1
2
3
4
5
6
7
8
9
10
Symbol
GND
RXV
CC
SD
RD (-)
RD (+)
TXV
CC
GND
Disable
TD (+)
TD (-)
Functional description
Receiver Signal Ground
Receiver Power Supply
Signal Detect
Receiver Data Out Bar (LVPECL)
Receiver Data Out (LVPECL)
Transmitter Power Supply
Transmitter Signal Ground
Transmitter Disable (LVTTL)
Transmitter Data In (LVPECL)
Transmitter Data In Bar (LVPECL)
Pin Drawing:
Tx
Rx
10 9 8 7 6
2x5 Module Top View
1 2 3 4 5
www.deltaww.com
DELTA ELECTRONICS, INC.
3
Aug., 2006
Rev.：0E
LC-155Axxxxxx
Recommend Circuit Schematic
VeeT
DELTA SFF Module
TxDis
Tx_Disable
VccT
82ohm
82ohm
0.1uF
50 ohm TXL
50 ohm TXL
0.1uF
130ohm
3.3V
1uH
0.1uF
130 ohm
TD+
Laser Driver
TD -
Laser Diode
VccT
SerDes IC
10uF
0.1uF
1uH
VccR
10uF
0.1uF
0.1uF
50 ohm TXL
100 ohm*
50 ohm TXL
0.1uF
150 ohm
RD+
Preamp &
Quantizer
RD -
150 ohm
Photo-diode
* Depands on SerDes IC used
SD
Rx_SD
VeeR
Note:
1. 270 Ohm SD Output pull-down resisters required for LVPECL SD Output.
2. No connected for TTL SD Output.
www.deltaww.com
DELTA ELECTRONICS, INC.
4
Aug., 2006
Rev.：0E
LC-155Axxxxxx
Package Outline(Plastic housing)：
XXXXnm
LC-XXXXXXXXXX
YYMMDDLXXXXX
MADE IN CHINA
www.deltaww.com
DELTA ELECTRONICS, INC.
5
Aug., 2006
Rev.：0E
