OPTICAL COMMUNICATIONS
DWDM SFP Optical Transceiver—C-Band for up to 180 km Reach
SFP Series
Key Features
• Support line rate from 100 Mbps to 3.1 G
• Compliant with DWDM SFP MSA Revision 1.0
• Up to 180 km reach, DWDM with 100 GHz ITU Grid,
C-band applications
• Operating temperature range of −5 to 70˚C or −40 to 85˚C
• Maximum power dissipation of 1.3 W for −5 to 70˚C tem-
perature range, or 1.5 W for −40 to 85˚C temperature range
• Compliant with RoHS 6/6
• Single 3.3 V power supply
• Enhanced digital diagnostic monitoring support
• Internal AC-coupled electrical interface
Applications
• Dense WDM
• SONET OC-3/12/48
• SDH STM-1/4/16
• Fast Ethernet and Gigabit Ethernet
• Fibre Channel
Compliance
• SFF 8472 Revision 10.3
• DWDM SFP MSA
• ITU-T G.957
• IEEE 802.3-2005
• Class 1 Laser Safety
• Compliance with Telcordia GR-468
The JDSU RoHS-compliant small form factor pluggable (SFP) optical transceiver
is an integrated fiber optic transceiver that provides a high-speed serial link at
signaling rates from 100 Mbps to 3.1 G. The module complies with the dense
wavelength-division multiplexing (DWDM) SFP MSA.
The DWDM SFP optical transceiver complies with ITU-T G.957 with 100 GHz
ITU grid channel spacing for up to 180 km reach (SONET OC-48/SDH STM-16);
and IEEE 802.3-2005 DWDM for 180 km reach (Gigabit Ethernet and 1 G Fibre
Channel) standards. The JDSU DWDM SFP optical transceiver is compatible with
Fast Ethernet, SONET OC-3 and OC-12, and SDH STM-1 and STM-4 standards.
Our DWDM SFP optical transceiver integrates the receive and transmit path
on one module. On the transmit side, the serial data stream is passed to a laser
driver. The laser drivers biases and modulates a cooled directly modulated laser
(DML), enabling data transmission over single-mode fiber through an industry-
standard LC connector. On the receive side, the optical data stream is recovered
from an avalanche photodiode (APD) photodetector, transimpedance amplifier,
and passed to a post amplifier. This module also features a hot-pluggable, SFI-
compliant electrical interface.
NORTH AMERICA: 800 498-JDSU (5378)
WORLDWIDE: +800 5378-JDSU
WEBSITE: www.jdsu.com
DWDM SFP OPTICAL TRANSCEIVER
—C-BAND FOR UP TO 180 KM REACH
2
Section 1
Functional Description
The RoHS-compliant SFP optical transceiver is a fully duplexed serial electric, serial
optical device with both transmit and receive functions contained in a single module
that provides a high-speed serial link at signaling rates from 100 Mbps to 3.1 G. It is
compliant with Telcordia GR-253-CORE and ITU-T G.957 with 100 GHz ITU grid
channel spacing for 180 km reach (SONET OC-48 / SDH STM-16); and IEEE 802.3-
2005 DWDM for 180 km reach (Gigabit Ethernet and 1 G Fibre Channel) applica-
tions. The DWDM SFP optical transceiver is compatible with Fast Ethernet, SONET
OC-3 and OC-12, and SDH STM-1 and STM-4 applications. The transceiver is also
fully compliant with the SFP module MSA INF8074i Rev. 1.0. A block diagram of the
DWDM SFP optical transceiver is shown in Figure 1.
V
ccT
V
ccR
V
eeT
V
eeR
Power Supply Sequence
Transceiver Ground
ROSA
RD–
RD+
Post Amplifier
TIA
MOD_DEF(1)
MOD_DEF(2)
TD–
TD+
RX_LOS
TX_FAULT
TX_DIS
MCU
TEC
Controller
Laser Driver
TOSA
MOD_DEF(0)
TX_DIS
Figure 1.
DWDM SFP optical transceiver functional block diagram
The DWDM SFP optical transceiver does not require rate selection to operate at
the designated line rate. It has several low-speed interface connections, including
a two-wire serial interface. These connections also include transceiver presence
(Mod_Def(0)), transmitter fault (TX_FAULT), transmitter disable (TX_DIS), and
receive loss (RX_LOS).
DWDM SFP OPTICAL TRANSCEIVER
—C-BAND FOR UP TO 180 KM REACH
3
Transmitter
The transmitter path converts serial NRZ electrical data from line rate of 100 Mbps to
3.1 G to a standard, compliant optical signal. The transmitter accepts a 100
Ω
differen-
tial 400 mV peak-to-peak to 2400 mV peak-to-peak CML electrical signal on TD− and
TD+ pins.
Inside the module, the differential signals pass through a laser driver, which transforms
the small swing digital voltage to an output modulation that drives a cooled DML laser.
The optical signal is engineered to meet SONET/SDH, Ethernet, and Fibre Channel
rate DWDM specifications at ITU grids with 100 GHz channel spacing. Closed-loop
control of the transmitted laser power, modulation swing, and center wavelength over
temperature and voltage variations is provided. The laser is coupled to single-mode
optical fiber through an industry-standard LC optical connector.
Receiver
The receiver converts incoming DC-balanced serial NRZ optical data from 100 Mbps
to 3.1 G line rates into serial electrical data. Light is coupled to an APD photodetector
from single-mode optical fiber through an industry-standard LC optical connector.
The electrical current from the APD photodetector converts to voltage in a high-gain
transimpedance amplifier.
The amplified signal is passed to a post amplifier. Loss of signal and signal lock detec-
tion is included in the receive circuitry that is reflected in the RX_LOS status pin. The
recovered data is output on the RD+ and RD− pins as a 100
Ω
differential 400 mV to
800 mV peak-to-peak CML signal. The output signal meets SFP MSA requirements.
Low-Speed Signaling
Low-speed signaling is based on low voltage TTL (LVTTL) operating at a nominal
voltage of 3.3 V.
MOD_DEF(1)/MOD_DEF(2): Two-wire serial interface clock and data line
—
Hosts should use a pull-up resistor connected to V
CC
3.3 V on the two-wire inter-
face MOD_DEF(1) (clock), MOD_DEF(2) (data), and all low-speed outputs.
TX_FAULT: Output pin
—
When high, indicates possible transmitter operational
fault or a status critical to the host system.
TX_DIS: Input pin
—
When asserted high, the transmitter output is turned off.
Mod_DEF(0): Output pin
—
When pulled to ground by the module, it indicates
that the module is present.
RX_LOS: Output pin
—
Asserted high when insufficient optical power for reliable
signal reception is received.
DWDM SFP OPTICAL TRANSCEIVER
—C-BAND FOR UP TO 180 KM REACH
4
Section 2
Application Schematics
Power supply filtering is recommended for the DWDM SFP optical transceiver.
To limit wideband noise power, the host system and module must each meet a
maximum of two-percent peak-to-peak noise when measured with a 1 MHz
low-pass filter. In addition, the host system and the module must each meet a
maximum of three-percent peak-to-peak noise when measured with a filter from
1 to 10 MHz. Figure 2 shows recommended power-supply network connections to
the DWDM SFP optical transceiver.
Host Board
1
μH
0.1
μF
3.3 V
1
μH
10
μF
0.1
μF
10
μF
0.1
μF
V
CC
T
SFP
Transceiver
V
CC
R
Notes:
1. Place power-supply filtering components as close as possible to the V
CC
pins of the host connector for optimal performance.
2. ESR of the inductor should be less than 0.5
Ω
to ensure proper power supply levels.
Figure 2.
Application schematics for the DWDM SFP optical transceiver
DWDM SFP OPTICAL TRANSCEIVER
—C-BAND FOR UP TO 180 KM REACH
5
Section 3
Specifications
Technical specifications related to the DWDM SFP optical transceiver includes:
Section 3.1
Pin Function Definitions
Section 3.2
Absolute Maximum Ratings
Section 3.3
Electrical Characteristics
Section 3.4
Jitter Specifications
Section 3.5
Timing Requirement of Control and Status I/O
Section 3.6
SFP Two-Wire Interface Protocol and Management Interface
Section 3.7
Optical Transmitter Characteristics
Section 3.8
Optical Receiver Characteristics
Section 3.9
Wavelength Availability
Section 3.10
Regulatory Compliance
Section 3.11
Module Outline
Section 3.12
Connectors
3.1
Pin Function Definitions
V
EE
T
1
2
3
4
V
EE
T
TD−
TXFault
TD+
TX Disable
V
EE
T
MOD-DEF(2)
V
CC
T
20
19
18
17
16
15
14
13
12
11
Towards
Bezel
5
6
7
8
9
10
MOD-DEF(1)
V
CC
R
MOD-DEF(0)
V
EE
R
Rate Select
RD+
LOS
RD−
V
EE
R
V
EE
R
V
EE
R
Towards
ASIC
Figure 3.
SFP optical transceiver pin-out on host board
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