RoHS Compliant Multi-Rate CWDM SFP Transceiver for SONET
OC-48/SDH STM-16 with DDM Function
FEATURES
Compliant with SFP Transceiver SFF-8472
MSA specification with internal calibration
Multi-rate operation from 125 to 2670Mpbs
Single + 3.3V Power Supply and TTL Logic
Interface
Uncooled DFB laser transmitter and APD
receiver
Eight CWDM wavelength available
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-2488 CWDM series are designed
for coarse wavelength division multiplexing
applications (CWDM) and hot pluggable SFP
Applications
ATM switches and routers
SONET/SDH switch infrastructure
transceiver modules that data rates up to 2.67Gb/s.
xDSL applications
The LCP-2488 CWDM series are support OC-48/
Gigabit Ethernet
STM-16 as well as 2x Fiber channel (2.125Gb/s),
Switch to Switch interface
GbE (1.25Gb/s) and 1x Fiber channel (1.062Gb/s).
The selectiveness of center wavelength has 1470,
Switched backplane applications
1490, 1510, 1530, 1550, 1570, 1590, and 1610nm.
File server interface
The LCP-2488 CWDM series are designed to
be compliant with SFF-8472 SFP Multi-source
Performance
Agreement (MSA) with digital diagnostic
LCP-2488D4RxxR: 1470nm to 1610nm CWDM
monitoring functions: Temperature, V
CC
, TX
DFB laser transmitter and APD receiver, 28dB
optical power, TX laser bias current, and RX
received optical power.
The post-amplifier of the LCP-2488 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.
1
DELTA ELECTRONICS, INC.
link budget
Dec., 2006
Rev. 0E
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
2488
Electrical Characteristics
(V
CC
=3.3V
±
5%)
Parameter
Symbol
Min.
Typ.
Max.
Total Supply Current
LCP-2488D4RxxR
300
I
CCT
LCP-2488D4RxxRH
380
LCP-2488D4RxxRT
380
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
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.
Unit
mA
Note
V
V
V
kΩ
V
V
V
kΩ
V
V
1
2
3
2
2
DELTA ELECTRONICS, INC.
Dec., 2006
Rev. 0E
www.deltaww.com
Optical Characteristics
Transmitter
(V
CC
=3.3V
±
5%, Data Rate=2488Mb/sec, PRBS=2
23
-1 NRZ)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Note
Output Optical Power (Avg.)
P
dBm
0
+5
Optical Extinction Ratio
ER
8.2
dB
Center Wavelength
1470 1477.5
1464.5
LCP-2488D4x47R
1490 1497.5
1484.5
LCP-2488D4x49R
1510 1517.5
1504.5
LCP-2488D4x51R
λ
C
nm
1530 1537.5
1524.5
LCP-2488D4x53R
1550 1557.5
1544.5
LCP-2488D4x55R
1570 1577.5
1564.5
LCP-2488D4x57R
1590 1597.5
1584.5
LCP-2488D4x59R
1610 1617.5
1604.5
LCP-2488D4x61R
σ
Spectral Width (-20dB)
1
nm
Side-mode Suppression Ratio
SMSR
30
dB
Optical Rise/ Fall Time
150/200
psec
1
t
r
/t
f
Relative Intensity Noise
RIN
-120
dB/Hz
Jitter Generation
UI
J
PP
0.1
Peak to Peak
0.01
RMS
J
rms
2
dB
2.5
Dispersion Penalty @ 80 km
Output Eye
Compliant with GR-253-CORE and ITU recommendation G.957
Receiver
(V
CC
=3.3V
±
5%, Data Rate=2488Mb/sec, PRBS=2
23
-1 NRZ)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Note
Sensitivity (Avg.) @2.488Gbps
P
S
dBm
3, 4
-28
λ
Input Optical Wavelength
1450
1620
nm
LOS-Deasserted (Avg.)
P
A
dBm
-28
LOS-Asserted (Avg.)
P
D
-40
dBm
LOS-Hysteresis
P
A
-P
D
0.5
dB
Overload
P
0
-9
dBm
Reflectance
r
-27
dB
Notes:
1. These are unfiltered 20%~80% values.
2. SMF-28 fiber used. 80 km represents 1600ps/nm at 1610nm. Measured at 2.488 Gb/s with a
PRBS 2
23
-1 pattern at a BER<10
-10
.
3. The sensitivity is provided at a BER of 1×10
-10
or better with an input signal consisting of
2677Mb/s/OC-48/2X FC/GbE/1X FC/ OC-12/OC-3, 2
23
-1 PRBS and ER=9dB.
4. 2.488 Gb/s BER<10
-10
with PRBS 2
23
-1. Does not include dispersion penalty.
3
DELTA ELECTRONICS, INC.
Dec., 2006
Rev. 0E
www.deltaww.com
1.25
1.00
Mean level of logical “1”
Amplitude
0.75
0.25
0.00
-0.25
Mean level of logical “0”
Time
Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957
Mask of the eye diagram for the optical transmit signal
Recommend Circuit Schematic
VCC
3.3V
1uH
1uH
RES1
10uF
0.1uF
0.1uF
Protocol Vcc
DELTA SFP Module
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
10uF
VeeT
VccR
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.
Dec., 2006
Rev. 0E
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
Dec., 2006
Rev. 0E
Plug Seq.: Pin engagement sequence during hot plugging.
5
DELTA ELECTRONICS, INC.
www.deltaww.com
嵌入式系统
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