LC-1250xxxx Series
RoHS Compliant 2X5 SC Small Form Factor Transceiver for Gigabit
Ethernet
Features
Compliant with SFF transceiver MSA
specification
Compliant with Specifications for IEEE
802.3z/Gigabit Ethernet
LC-1250BxQxRx compliant with the
1.0625GBd Fiber Channel 100-SM-LC-L FC-PI
Rev.13
LC-1250AxFxRx compliant with the
1.0625GBd Fiber Channel FC-PI 100-M5-SN-I
Rev.13
Single +3.3V Power Supply
PECL or TTL Signal Detect level
Duplex LC connector interface
Laser Class 1 Product which comply with the
requirements of IEC 60825-1 and IEC 60825-2
RoHS Compliant per Directive 2002/95/EC.
Description
The LC-1250xxxx series are high performance,
cost effective optical transceivers intended for
1250Mb/s. They are designed to provide Gigabit
Ethernet compliant link at 1250Mb/s for short,
intermediate and long reach links, respectively.
The LC-1250xxxx series provide with the LC
receptacle that are compatible with the industry
standard LC connector.
The LC-1250xxxx series are Class 1 eye safety
product. The optical power levels, under normal
operation, are at eye safe level.
Applications
Gigabit Ethernet/Fast Ethernet
Switched backplane applications
File server interface
Performance
LC-1250AxFxRx:
850nm VCSEL, up to 500m in 50/125μm MMF
850nm VCSEL, up to 220m in 62.5/125μm MMF
LC-1250BxQxRx:
1310nm FP laser, Data Link up to 10km in
9/125um SMF
1310nm FP laser, up to 550m in 50/125μm MMF
1310nm FP laser, up to 550m in 62.5/125μm
MMF
1
DELTA ELECTRONICS, INC.
Jan., 2008
Rev. 0H
www.deltaww.com
LC-1250xxxx Series
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
Ambient Operating Temperature
Supply Voltage
Note:
1.See ordering information for detail
Symbol
T
A
V
CC
Min.
0
3.135
Typ.
Max.
70
3.465
Unit
ºC
V
Note
1
Electrical Characteristics
( V
CC
= 3.135 to 3.465V)
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
PECL SD Output
LOW level output voltage
HIGH level output voltage
TTL SD Output
LOW level output voltage
HIGH level output voltage
Symbol
V
IL
-V
CC
V
IH
-V
CC
V
DISH
V
DISL
V
OL
-V
CC
V
OH
-V
CC
V
SDL
-V
CC
V
SDH
-V
CC
V
SDL
V
SDH
Min.
-1.810
-1.165
2
0
-1.95
-1.045
-1.95
-1.05
0
2
Typ.
Max.
-1.475
-0.880
V
CC
0.8
-1.62
-0.74
-1.62
-0.74
0.8
V
CC
Unit
V
V
V
V
V
V
V
Note
V
2
DELTA ELECTRONICS, INC.
Jan., 2008
Rev. 0H
www.deltaww.com
LC-1250xxxx Series
Optical Performance Specification
( V
CC
= 3.135 to 3.465V )
Parameter
Transmitter
Supply Current
Output Optical Power (Avg.)
LC-1250AxFxRx
LC-1250BxQxRx
Optical Extinction Ratio
Center Wavelength
LC-1250AxFxRx
LC-1250BxQxRx
Spectral Width (RMS)
LC-1250AxFxRx
LC-1250BxQxRx
Optical Rise/Fall time
LC-1250AxFxRx
LC-1250BxQxRx
Relative Intensity Noise
Output Eye
Receiver
Supply Current
Optical Input Sensitivity (Avg.)
LC-1250AxFxRx
LC-1250BxQxRx
Optical Receiver saturation (Avg.)
Input Optical Wavelength
LC-1250AxFxRx
LC-1250BxQxRx
Optical Rise/Fall time
LC-1250AxFxRx
LC-1250BxQxRx
Signal Detect-Asserted (Avg.)
LC-1250AxFxRx
LC-1250BxQxRx
Signal Detect-De-asserted (Avg.)
Signal Detect-Hysteresis
Notes:
1. These are unfiltered 20%~80% values
2. The sensitivity is provided at a BER of 1×10
1250Mb/s, 2
7
-1 PRBS and ER=9dB.
-10
Symbol
Min.
Typ.
Max.
Unit
Note
I
CC
P
O
ER
λ
C
σ
-9.5
-9.5
9
830
1274
150
-4
-3
mA
dBm
dB
860
1355
0.85
4.5
nm
nm
ns
1
0.26
0.4
RIN
-116
dB/Hz
Complies with the IEEE 802.3z/D2 specification, and is class 1
laser eye safety
t
r
/t
f
I
CC
P
IN
P
SAT
λ
-3
830
1274
120
-17
-19
mA
dBm
dBm
2
860
1355
0.36
0.5
-17
-19
nm
t
r
/t
f
P
A
P
D
P
A
-P
D
-30
0.5
ns
1
dBm
dBm
dB
or better with an input signal consisting of
3
DELTA ELECTRONICS, INC.
Jan., 2008
Rev. 0H
www.deltaww.com
LC-1250xxxx Series
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 or LVTTL)
Receiver Data Out Inverted (LVPECL)
Receiver Data Out Non-inverted (LVPECL)
Transmitter Power Supply
Transmitter Signal Ground
Transmitter Disable
Transmitter Data In Non-inverted (LVPECL)
Transmitter Data In Inverted (LVPECL)
4
DELTA ELECTRONICS, INC.
Jan., 2008
Rev. 0H
www.deltaww.com
LC-1250xxxx Series
Pin Out Drawing
Recommended Circuit Schematic (LC-1250xxx1Rx)
R1=R3=82 ohm (3.3V),68 ohm(5V)
R2=R4=130 ohm (3.3V),191 ohm (5V)
R5=R6=150 ohm (3.3V),270 ohm (5V)
R7=130 ohm (3.3V PECL),82 ohm(5V),NC (TTL)
R8=82 ohm (3.3V PECL),130 ohm(5V),NC (TTL)
C1=C2=C3=C4=C5=C6=C7=100 nF
5
DELTA ELECTRONICS, INC.
Jan., 2008
Rev. 0H
www.deltaww.com
