Delta Electronics CWDM User Manual
RoHS Compliant Multi-Rate CWDM SFP Transceiver for GbE and
Fiber Channel with DDM Function
FEATURES
Compliant with SFP Transceiver SFF-8472
MSA specification with internal calibration
Multi-rate operation from 125 to 1250Mpbs
Single + 3.3V Power Supply and TTL Logic
Interface
8 Wavelength (λ) Uncooled CWDM DFB laser
LD transmitter
EEPROM with Serial ID Functionality
Laser Class 1 Product which comply with the
requirements of IEC 60825-1 and IEC 60825-2
Duplex LC Connector interface
Description
The LCP-1250 CWDM series are designed
for coarse wavelength division multiplexing
applications (CWDM) and hot pluggable SFP
transceiver modules that data rates up to 1.25Gb/s.
The LCP-1250 CWDM series are support GbE
(1.25Gb/s) and 1x Fiber channel (1.062Gb/s). The
selectiveness of center wavelength has 1470,
1490, 1510, 1530, 1550, 1570, 1590, and 1610 nm.
The LCP-1250 CWDM series are designed to
be compliant with SFF-8472 SFP Multi-source
Agreement (MSA) with digital diagnostic
monitoring functions: Temperature, V
optical power, TX laser bias current, and RX
received optical power.
The post-amplifier of the LCP-1250 CWDM
series also includes a Loss of Signal (LOS) circuit
that provides a TTL logic-high output when the
received optical level is below a preset LOS
Assert threshold.
, TX
CC
Applications
Gigabit Ethernet
Switch to Switch interface
Switched backplane applications
File server interface
Performance
LCP-1250D4MxxRB: 1470nm to 1610nm CWDM
DFB laser transmitter and PIN receiver, 19dB
link budget
LCP-1250D4RxxRB: 1470nm to 1610nm CWDM
DFB laser transmitter and PIN receiver, 24dB
link budget
LCP-1250D4VxxRB: 1470nm to 1610nm CWDM
DFB laser transmitter and APD receiver, 30dB
link budget
DELTA ELECTRONICS, INC.
1 2008/1/15
Rev. 0A
www.deltaww.com
Absolute Maximum Ratings
Parameter Symbol Min. Typ. Max. Unit Note
Storage Temperature Ts -40 85 ºC
Supply Voltage VCC 0 5 V
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Unit Note
Case Operating Temperature TC -5 70 ºC 1
Supply Voltage VCC 3.135 3.465 V
Data Rate 1250 Mbps
Note 1: See order information
Electrical Characteristics
(VCC=3.3V ± 5%)
Parameter Symbol Min. Typ. Max. Unit Note
Total Supply Current
LCP-1250D4xxxRB
LCP-1250D4xxxRBH
I
CCT
LCP-1250D4xxxRBT
Transmitter
Transmitter Differential Input Voltage VDT 0.5 2.4 V 1
Transmitter Disable Input-High V
Transmitter Disable Input-Low V
Transmitter Fault Pull up Resistor R
TX_FAULT
Transmitter Fault Output-High V
Transmitter Fault Output-Low V
DISH
DISL
TXFH
TXFL
2 VCC+0.3 V
Vee 0.8 V
4.7 10 k 2
2 VCC+0.3 V
Vee 0.8 V
Receiver
Receiver Differential Output Voltage VDR 0.35 2 V 3
Receiver LOS Load R
LOS Output Voltage-High V
LOS Output Voltage-Low V
RXLOS
LOSH
LOSL
Output Data Rise/Fall Time tr / t
f
4.7 10 k 2
2 VCC+0.3 V
Vee 0.8 V
260 psec 4
Notes:
1. Internally AC coupled and terminated to 100Ohm differential load.
360
380
380
mA
2. Pull up to V
on host Board
CC
3. Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/
Deserializer.
4. These are 20%~80% values
2 2008/1/15
Rev. 0A
DELTA ELECTRONICS, INC.
www.deltaww.com
Optical Characteristics
Transmitter
=3.3V ± 5%, Data Rate=1250Mb/sec, PRBS=2
(V
CC
Parameter Symbol Min. Typ. Max. Unit Note
Output Optical Power (Avg.)
LCP-1250D4MxxRB
LCP-1250D4RxxRB
LCP-1250D4VxxRB
Optical Extinction Ratio ER 9 dB
Center Wavelength
LCP-1250D4x47RB
LCP-1250D4x49RB
LCP-1250D4x51RB
LCP-1250D4x53RB
λ
LCP-1250D4x55RB
LCP-1250D4x57RB
LCP-1250D4x59RB
LCP-1250D4x61RB
Spectral Width (-20dB)
σ
Side-mode Suppression Ratio SMSR 30
Optical Rise/ Fall Time
Relative Intensity Noise
t
RIN -120 dB/Hz
Output Eye Compliant with IEEE 802.3z
Receiver
=3.3V ± 5%, Data Rate=1250Mb/sec, PRBS=2
(V
CC
Parameter Symbol Min. Typ. Max. Unit Note
Sensitivity (Avg.) @1.25Gbps
LCP-1250D4MxxRB
LCP-1250D4RxxRB
P
LCP-1250D4VxxRB
Input Optical Wavelength
λ
LOS-Deasserted (Avg.)
LCP-1250D4MxxRB
LCP-1250D4RxxRB
P
LCP-1250D4VxxRB
LOS-Asserted (Avg.) P
LOS-Hysteresis PA-P
Overload (Avg.)
LCP-1250D4MxxRB
LCP-1250D4RxxRB
P
LCP-1250D4VxxRB
Reflectance r -12 dB
Notes:
1. These are unfiltered 20%~80% values.
2. The sensitivity is provided at a BER of 1×10
7
2
-1 PRBS and ER=9dB.
P
r/tf
7
-1 NRZ)
-5
0
0
1464.5
1484.5
1504.5
1524.5
C
1544.5
1564.5
1584.5
1604.5
1470
1490
1510
1530
1550
1570
1590
1610
0
+5
+5
1477.5
1497.5
1517.5
1537.5
1557.5
1577.5
1597.5
1617.5
dBm
nm
1 nm
dB
260 psec 1
7
-1 NRZ)
S
-24
-24
-30
dBm 2
1450 1620 nm
A
D
D
-40 dBm
0.5 dB
-24
-24
-30
dBm
0
-3
-3
dBm
-9
-12
or better with an input signal consisting of 1250Mb/s,
DELTA ELECTRONICS, INC.
3 2008/1/15
Rev. 0A
www.deltaww.com
Mask of the eye diagram for the optical transmit signal
Recommend Circuit Schematic
Protocol Vcc
Tx_Disable
Tx_Fault
Rx_LOS
VCC
SerDes ICProtocol IC
PLD / PAL
3.3V
0.1uF
100 Ohms*
RES1
3.3V
RES1
10uF
RES1
RES1
RES1
RES1 = 4.7k to 10k Ohms
* Depands on SerDes IC used
1uH
1uH
10uF
0.1uF
Tx_Disable
Tx_Fault
TD +
TD -
VeeT
0.1uF
RD +
RD -
Rx_LOS
VeeR
Mod_def 2
Mod_def 1
Mod_def 0
DELTA SFP Module
VccT
10k Ohms
0.01uF
100 Ohms
0.01uF
VccR
0.01uF
0.01uF
Laser Driver
Preamp &
Quantizer
EEPROM
Laser Diode
Photo Diode
DELTA ELECTRONICS, INC.
4 2008/1/15
Rev. 0A
www.deltaww.com
SFP Transceiver Electrical Pad Layout
Pin Function Definitions
Pin
Num.
1 VeeT Transmitter Ground 1
2 TX Fault Transmitter Fault Indication 3 Note 1
3 TX Disable Transmitter Disable 3
4 MOD-DEF2 Module Definition 2 3 Note 3, 2 wire serial ID interface
5 MOD-DEF1 Module Definition 1 3 Note 3, 2 wire serial ID interface
6 MOD-DEF0 Module Definition 0 3 Note 3, Grounded in Module
7 Rate Select Not Connect 3 Function not available
8 LOS Loss of Signal 3 Note 4
9 VeeR Receiver Ground 1 Note 5
10 VeeR Receiver Ground 1 Note 5
11 VeeR Receiver Ground 1 Note 5
12 RD- Inv. Received Data Out 3 Note 6
13 RD+ Received Data Out 3 Note 7
14 VeeR Receiver Ground 1 Note 5
15 VccR Receiver Power 2 3.3 ± 5%, Note 7
16 VccT Transmitter Power 2 3.3 ± 5%, Note 7
17 VeeT Transmitter Ground 1 Note 5
18 TD+ Transmit Data In 3 Note 8
19 TD- Inv. Transmit Data In 3 Note 8
20 VeeT Transmitter Ground 1 Note 5
Plug Seq.: Pin engagement sequence during hot plugging.
DELTA ELECTRONICS, INC.
Name Function
5 2008/1/15
Plug
Seq.
Notes
Note 2,Module disables on high or
open
www.deltaww.com
Rev. 0A
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