LC-155Bxxxx
155Mbps, 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.
Multisource 2x5 package styles with LC
Receptacle.
Single 5V（LC-155B1 and LC-155B3 Series）or
3.3V（LC-155B2 and LC-155B4 Series）Power
Supply.
PECL Differential Inputs and Outputs.
PECL（LC-155B1 and LC-155B2 Series） or
TTL（LC-155B3 and LC-155B4 Series）
Receiver Signal Detect Indicator.
Wave Solder and Aqueous Wash Process
Compatible.
Description：
The LC-155Bxxxx series from DELTA are SFF
（Small
Form Factor） 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-155Bxxxx transceivers are supplied in 2x5
DIP package style with duplex LC connector and
are fully complaint with SFF Multi Source
Agreement
（MSA）.
All LC-155Bxxxx series can meet Class-1 eye
safety standard and effective distance depends on
ITU-T G.957 standard or power penalty.
The transmitter sections utilize 1310nm Edge
Emitting InGaAsP Laser Diode. This Laser Diode is
packaged in the optical subassembly portion of the
transmitter section. A custom silicon IC that
converts differential PECL logical signals into an
analog LD 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：
Single-mode Fiber Backbone Links.
Fast Ethernet and ATM Compatible.
Single-mode Fiber Media Converter.
www.deltaww.com
DELTA ELECTRONICS, INC.
1
September 23, 2004
Revision：03
LC-155Bxxxx
Absolute Maximum Ratings
Parameter
Storage Temperature
Supply Voltage
Symbol
Ts
V
CC
Min.
-40
0
Typ.
Max.
85
6
Unit
ºC
V
Note
Recommended Operating Conditions
Parameter
Data Rate
Operating Temperature
LC-155Bxxx
LC-155BxxxT
Supply Voltage
LC-155B1 and LC-155B3 Series
LC-155B2 and LC-155B4 Series
Symbol
Min.
100
0
-40
4.75
3.15
Typ.
155.52
25
25
5
3.3
Max.
200
70
85
5.25
3.45
Unit
Mbps
ºC
Note
T
A
V
CC
V
Electrical Characteristics
Parameter
Transmitter
Transmitter Data Input Voltage-Low
Transmitter Data Input Voltage-High
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
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
-1.95
-1.045
-1.95
-1.05
2.4
Typ.
Max.
-1.48
-0.88
-1.62
-0.74
-1.62
-0.74
0.8
Unit
V
V
V
V
V
V
V
V
Note
ECL Family
LVTTL
Optical Characteristics
（Data
Rate = 155.52Mbps, PRBS=2
23
-1, NRZ, 9/125um SMF）
Parameter
Symbol
Min.
Typ.
Transmitter
Supply Current
Icc
Max.
150
120
-15
-8
-5
0
Unit
mA
Note
Mean Launch Power
Optical Extinction Ratio
Center Wavelength
Spectral Width (RMS)
Optical Risetime / Falltime
Output Eye Diagram
Receiver
Supply Current
Sensitivity
Overload
Signal Detect-Asserted
Signal Detect-DeAsserted
Signal Detect-Hysteresis
P
O
E.R.
λ
C
σ
t
r
/t
f
LC-155B1、B3 Series
LC-155B2、B4 Series
-20
LC-155BxHxxx
-15
LC-155BxJxxx
dBm
-8
LC-155BxLxxx
-5
LC-155BxMxxx
9
dB
1280
1310
1340
nm
nm
2
10%½90%
0.7
ns
Compliant with ITU-T recommendation G.957
120
100
-32
-34
-8
-34
-45
1
2
mA
dBm
dBm
dBm
dBm
dB
LC-155B1、B3 Series
LC-155B2、B4 Series
LC-155BxMxxx
Icc
P
IN
Pol
P
A
P
D
P
A
-P
D
www.deltaww.com
DELTA ELECTRONICS, INC.
September 23, 2004
Revision：03
LC-155Bxxxx
Notes：The sensitivity should be tested at BER of 1×10
-10
or better with an input signal consisting of 155Mb/s,
NRZ, PRBS=2
23
-1 and E.R.= 9dB.
Pin Definition：
PIN
1
2
3
4
5
6
7
8
9
10
Symbol
GND
VccR
SD
RD (-)
RD (+)
VccT
GND
TxDis
TD (+)
TD (-)
Functional description
Receiver Signal Ground
Receiver Power Supply
Receiver Signal Detect (LVPECL、LVTTL or TTL)
Receiver Data Out Bar (LVPECL or PECL)
Receiver Data Out (LVPECL or PECL)
Transmitter Power Supply
Transmitter Signal Ground
Transmitter Disable
Transmitter Data In (LVPECL or PECL)
Transmitter Data In Bar (LVPECL or PECL)
Recommend Circuit Schematic：
www.deltaww.com
DELTA ELECTRONICS, INC.
3
September 23, 2004
Revision：03
LC-155Bxxxx
Note：
When system Vcc is 5V, the resistors
are as below:
R1=150Ω
R2=R3=191Ω；R4=R5=68Ω
R6=R7=270Ω；R8=130Ω；R9=82Ω
When system Vcc is 3.3V, the
resistors are as below:
R1=150Ω
R2=R3=130Ω；R4=R5=82Ω
R6=R7=150Ω；R8=82Ω；R9=130Ω
R10, R11, R12 depend on SerDes IC
specification.
For getting better EMI performance,
the Tx Vcc and Rx Vcc should isolate
each other as left photograph.
Package Outline：
Unit：mm
LC-155B Series with Plastic Housing
www.deltaww.com
DELTA ELECTRONICS, INC.
4
September 23, 2004
Revision：03
Power technology
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