OPTICAL COMMUNICATIONS
SFP Optical Transceiver—OC-48 for up to 80-km Reach,
OC-12 and Gigabit Ethernet for up to 120-km Reach
Key Features
• Supports line rate from 100 Mbps to 3.1 Gbps
• Compliant with SFP MSA INF-8074i Revision 1.0
• Operating case temperature range -40 to 85°C
• Available in PIN or APD-based receiver
• Maximum power dissipation 1.2 W
• Lead-free and RoHS 6/6-compliant
• Single 3.3 V power supply
• Digital diagnostic monitoring support
Applications
• Metro access and metro core
• Wide area networks
• Optical crossconnects
Compliance
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 Gbps. The module complies with the small
form factor pluggable (SFP) multisource agreement (MSA).
The SFP optical transceiver complies with Telcordia GR-253-CORE and ITU-T
G.957 standards for up to 80-km reach (SONET OC-12 / SDH STM-4; SONET
OC-48 / SDH STM-16), and IEEE 802.3-2005 standard for up to 120-km reach
(Gigabit Ethernet and 1G Fibre Channel). It is also compatible to Fast Ethernet,
SONET OC-3 and OC-12, and SDH STM-1 and STM-4 standards.
The SFP optical transceiver integrates the receive and transmit path on one module.
In the transmit side, the serial data stream is passed to a laser driver. The laser driv-
ers biases and modulates an uncooled DML (direct modulated laser), enabling data
transmission over single-mode fiber through an industry-standard LC connector.
In the receive side, the optical data stream is recovered from a PIN or avalanche
photodetector (APD) transimpedance amplifier, and passed to a post amplifier. This
module features a hot-pluggable SFI-compliant electrical interface.
• SFF 8074i MSA
• SFF 8472 Revision 10.4
• GR-253-CORE
• ITU-T G.957
• IEEE 802.3-2005
• Compliance with Telcordia GR-468
NORTH AMERICA: 800 498-JDSU (5378)
WORLDWIDE: +800 5378-JDSU
WEBSITE: www.jdsu.com
SFP OPTICAL TRANSCEIVER—OC-48 FOR UP TO 80-KM REACH,
OC-12 AND GIGABIT ETHERNET FOR UP TO 120-KM REACH
2
Section 1
Functional Description
The JDSU RoHS-compliant Small Form factor Pluggable (SFP) Optical Transceiver
is a fully duplex serial electric, serial optical device with both transmit and receive
functions contained in a single module that provides a high-speed serial link at sig-
naling rates from 100 Mbps to 3.1 Gbps. It is designed to be compliant with Telcordia
GR-253-CORE IR and ITU-T G.957 S-16 standards (PIN receiver based) or Telcordia
GR-253-CORE LR and ITU-T G.957 L-4 standards (APD receiver based) (SONET
OC-12 / SDH STM-4), Telcordia GR-253-CORE LR and ITU-T G.957 L-16 standards
(APD receiver based) (SONET OC-48 / SDH STM-16), IEEE 802.3-2005 for up to 80
km reach (PIN receiver based) or up to 120 km reach (APD receiver based) (Gigabit
Ethernet and 1G Fibre Channel) applications. The optical performance for each ap-
plication is defined in Sections 3.8 to 3.19 below. The JDSU SFP Optical Transceiver is
compatible to Fast Ethernet, SONET OC-3 and OC-12, and SDH STM-1 and STM-4
applications. The transceiver is also fully compliant with the Small Form Factor SFP
Pluggable Module Multi-Source Agreement INF-8074i Rev. 1.0. A block diagram of
the JDSU SFP optical transceiver is shown in Figure 1 below.
The JDSU SFP optical transceiver does not need Rate Select to operate at the desig-
nated line rate. It has several low-speed interface connections including a 2-wire serial
interface. These connections also include: transceiver presence (Mod_Def(0)), trans-
mitter fault (TX_FAULT), transmitter disable (TX_DIS), and receive loss (RX_LOS).
Transmitter
The transmitter path converts serial NRZ electrical data from line rate of 100 Mbps
to 3.1 Gbps to a standard compliant optical signal. The transmitter accepts a 100
Ω
differential 300 mV peak-to-peak to 1400 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 an uncooled DML
laser. The optical signal is engineered to meet the SONET / SDH, Ethernet and Fibre
Channel rates specifications. 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 line rate
of 100 Mbps to 3.1 Gbps into serial electrical data. Light is coupled to a PIN or
APD photodetector from single-mode optical fiber through an industry standard
LC optical connector. The electrical current from the PIN or APD photodetector is
converted to a voltage in a high-gain transimpedance amplifier.
The amplified signal is passed to a Post Amplifier. Loss of signal, and signal lock
detection 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
600 mV to 1600 mV peak-to-peak CML signal. The output signal meets the SFP
MSA requirements.
SFP OPTICAL TRANSCEIVER—OC-48 FOR UP TO 80-KM REACH,
OC-12 AND GIGABIT ETHERNET FOR UP TO 120-KM REACH
3
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 Vcc 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. Pulled to ground by the module to indicate that the
module is present.
RX_LOS: Output pin. Asserted high when insufficient optical power for reliable
signal reception is received.
V
ccT
V
ccR
V
eeR
V
eeT
Power Supply Sequence
Transceiver Ground
ROSA
RD-
RD+
Post Amplifier
TIA
MOD_DEF(1)
MOD_DEF(2)
TD-
TD+
LOS
TX_FAULT
TX_DIS
MCU
Laser Driver
TOSA
MOD_DEF(0)
RATE_SELECT
Figure 1
SFP optical transceiver functional block diagram
SFP OPTICAL TRANSCEIVER—OC-48 FOR UP TO 80-KM REACH,
OC-12 AND GIGABIT ETHERNET FOR UP TO 120-KM REACH
4
Section 2
Application Schematics
Power supply filtering is recommended for the JDSU SFP optical transceiver. To
limit wide-band noise power, the host system and module shall each meet a maxi-
mum of 2 percent peak-to-peak noise when measured with a 1 MHz low-pass
filter. In addition, the host system and the module shall each meet a maximum of
3 percent peak-to-peak noise when measured with a filter from 1 – 10 MHz. Rec-
ommended power supply network connections to the SFP optical transceiver are
shown in Figure 2 below.
Host Board
1μH
0.1μF
3.3V
1μH
10μF
0.1μF
10μF
0.1μF
V
ccT
SFP
Transceiver
V
ccR
Notes:
1. Power supply filtering components should be placed as close to the Vcc pins of the host connector as possible for optimal performance.
2. ESR of inductor should be less than 0.5
Ω
to ensure proper power supply levels.
Figure 2
Recommended power supply filter network
SFP OPTICAL TRANSCEIVER—OC-48 FOR UP TO 80-KM REACH,
OC-12 AND GIGABIT ETHERNET FOR UP TO 120-KM REACH
5
Section 3
Section 3.1
Section 3.2
Section 3.3
Section 3.4
Section 3.5
Section 3.6
Section 3.7
Section 3.8
Section 3.9
Section 3.10
Section 3.11
Section 3.12
Section 3.13
Section 3.14
Section 3.15
Section 3.16
Section 3.17
Section 3.18
Section 3.19
Section 3.20
Section 3.21
Section 3.22
Specifications
Technical specifications related to the JDSU SFP optical transceiver include:
Pin Function Definitions
Absolute Maximum Ratings
Operating Conditions
Electrical Characteristics
Jitter Specifications
Timing Requirement of Control and Status I/O
SFP Two-wire Interface Protocol and Management Interface
Optical Characteristics (622 Mbps, 1310 nm, 40 km, APD Receiver, OC-12 LR-1)
Optical Characteristics (622 Mbps, 1550 nm, 80 km, APD Receiver, OC-12 LR-2)
Optical Characteristics (622 Mbps, 1550 nm, 120 km, APD Receiver, OC-12 LH)
Optical Characteristics (1.25 Gbps, 1310 nm, 25 km, PIN Receiver)
Optical Characteristics (1.25 Gbps, 1310 nm, 40 km, APD Receiver)
Optical Characteristics (1.25 Gbps, 1550 nm, 40 km, PIN Receiver)
Optical Characteristics (1.25 Gbps, 1550 nm, 80 km, PIN Receiver)
Optical Characteristics (1.25 Gbps, 1550 nm, 120 km, APD Receiver)
Optical Characteristics (2.5 Gbps, 1310 nm, 20 km, PIN Receiver, OC-48 IR-1)
Optical Characteristics (2.5 Gbps, 1550 nm, 40 km, PIN Receiver, OC-48 IR-2)
Optical Characteristics (2.5 Gbps, 1310 nm, 40 km, APD Receiver, OC-48 LR-1)
Optical Characteristics (2.5 Gbps, 1550 nm, 80 km, APD Receiver, OC-48 LR-2)
Regulatory Compliance
Module Outline
Connectors
3.1
Pin Function Definitions
Figure 3
SFP optical transceiver pin-out on host board
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