LC-155Bxxxxxx
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-LX Version of IEEE 802.3u.
Multisource 2x5 package styles with LC
Receptacle.
Single 3.3V Power Supply.
PECL Differential Inputs and Outputs.
PECL（LC-155B2xxxxxx Series） or TTL
（LC-155B4xxxxxx
Series）Receiver Signal
Detect Indicator.
Wave Solder and Aqueous Wash Process
Compatible.
RoHS Compliant per Directive 2002/95/EC.
Description：
The LC-155Bxxxxxx 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-155Bxxxxxx transceivers are supplied in
2x5 DIP package style with duplex LC connector
and are fully complaint with SFF Multi Source
Agreement
（MSA）.
All LC-155Bxxxxxx 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
Aug., 2006
Rev.：0D
LC-155Bxxxxxx
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.
100
0
3.15
Typ.
155.52
3.3
Max.
200
70
3.45
Unit
Mbps
ºC
V
Note
1
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, 9/125um SMF）
Parameter
Symbol
Min.
Typ.
Transmitter
Supply Current
Icc
-15
Mean Launch Power
P
O
-5
Optical Extinction Ratio
E.R.
9
λ
C
1280
1310
Center Wavelength
Spectral Width (RMS)
Output Eye Diagram
Receiver
Supply Current
Sensitivity
Overload
Signal Detect-Asserted
σ
Max.
150
-8
0
Unit
mA
dBm
dB
nm
Note
LC-155BxMxxxxx
1340
7.7
nm
3
LC-155BxMxxxxx
Compliant with ITU-T recommendation G.957
150
-31
-34
mA
dBm
dBm
-31
-34
dBm
LC-155BxMxxxxx
LC-155BxMxxxxx
LC-155BxMxxxxx
Icc
P
IN
Pol
P
A
-8
-10
Signal Detect-DeAsserted
P
D
-45
dBm
Signal Detect-Hysteresis
P
A
-P
D
0.5
dB
-10
Notes：The sensitivity should be tested at BER of 1×10 or better with an input signal consisting of 155Mb/s,
www.deltaww.com
DELTA ELECTRONICS, INC.
2
Aug., 2006
Rev.：0D
LC-155Bxxxxxx
NRZ, PRBS=2
23
-1 and E.R.= 9dB.
Mask of the eye diagram for the optical transmit signal
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)
Pin Out 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.：0D
LC-155Bxxxxxx
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 (3.3V), 510 Ohm (5V) 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.：0D
LC-155Bxxxxxx
Package Outline (Plastic Housing)：
XXXXnm
LC-XXXXXXXXXX
YYMMDDLXXXXX
MADE IN CHINA
www.deltaww.com
DELTA ELECTRONICS, INC.
5
Aug., 2006
Rev.：0D
