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