Data Sheet
January 2000
NetLight
™
2417J4A 1300 nm Laser
Gigabit Transceiver
s
s
Transmitter disable input
Wide dynamic range receiver with InGaAs PIN
photodetector
TTL signal-detect output
Low power dissipation
Single +3.3 V power supply
Raised ECL (PECL) logic data interfaces
Operating temperature range: 0
°
C to
70
°
C
Lucent Reliability and Qualification Program for
built-in quality and reliability
s
s
s
s
s
s
Description
The 2417J4A transceiver is a high-speed, cost-effec-
tive optical transceiver that is compliant with the
IEEE
* 802.3z Gigabit Ethernet Physical Medium
Dependent (PMD) 1000Base-LX specifications using
a long-wavelength laser. The transceiver features the
latest generation of Lucent optics and is packaged in
a narrow-width plastic housing with an LC duplex
receptacle. This receptacle fits into an RJ-45 form
factor outline. The 10-pin package and pinout con-
form to a multisource transceiver agreement.
The transmitter features differential PECL logic level
data inputs and a TTL logic level disable input. The
receiver features differential PECL logic level data
outputs and a TTL logic level signal-detect output.
*
IEEE
is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc.
Available in a small form factor, RJ-45 size, plastic package,
the 2417J4A Transceiver is a high-performance, cost-
effective, optical transceiver for Gigabit Ethernet 1000Base-
LX applications.
Features
s
s
Gigabit Ethernet 1000Base-LX compliant
Small form factor (SFF), RJ-45 size, multisourced
10-pin package
LC duplex receptacle
Uncooled 1300 nm laser transmitter with automatic
output power control
s
s
NetLight
2417J4A 1300 nm Laser
Gigabit Transceiver
Data Sheet
January 2000
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Supply Voltage
Operating Temperature Range
Storage Case Temperature Range
Lead Soldering Temperature/Time
Operating Wavelength Range
Symbol
V
CC
T
C
T
stg
—
λ
Min
0
0
–40
—
1.1
Max
3.6
70
85
250/10
1.6
Unit
V
°
C
°
C
°
C/s
µ
m
Pin Information
5 4 3 2 1
6 7 8 9 10
RX
TX
1-1031 (F)
Figure 1. 2417J4A Transceiver, 10-Pin Configuration, Top View
Table 1. Transceiver Pin Descriptions
Pin
Number
MS
Symbol
Name/Description
Receiver
Mounting Studs.
The mounting studs are provided for transceiver mechani-
cal attachment to the circuit board. They may also provide an optional con-
nection of the transceiver to the equipment chassis ground.
Receiver Signal Ground
.
Receiver Power Supply.
Signal Detect.
Normal operation: logic one output.
Fault condition: logic zero output.
Received DATA Out.
Received DATA Out.
Transmitter
Transmitter Power Supply.
Transmitter Signal Ground
.
Transmitter Disable.
Transmitter DATA In.
An internal termination is provided, consisting of a
100
Ω
resistor between the TD+ and TD– pins.
Transmitter DATA In.
See TD+ pin for terminations.
Logic
Family
NA
MS
1
2
3
V
EER
V
CCR
SD
NA
NA
LVTTL
4
5
6
7
8
9
10
RD–
RD+
V
CCT
V
EET
T
DIS
TD+
TD–
LVPECL
LVPECL
NA
NA
LVTTL
LVPECL
LVPECL
2
Lucent Technologies Inc.
Data Sheet
January 2000
NetLight
2417J4A 1300 nm Laser
Gigabit Transceiver
Multilayer construction also permits the routing of sen-
sitive signal traces away from high-level, high-speed
signal lines. To minimize the possibility of coupling
noise into the receiver section, high-level, high-speed
signals such as transmitter inputs and clock lines
should be routed as far away as possible from the
receiver pins.
Noise that couples into the receiver through the power
supply pins can also degrade performance. It is
recommended that the pi filter, shown in Figure 2, be
used for both the transmitter and receiver power
supplies.
Electrostatic Discharge
Caution: This device is susceptible to damage as
a result of electrostatic discharge (ESD).
Take proper precautions during both
handling and testing. Follow
EIA
*
Stan-
dard
EIA-625.
Although protection circuitry is designed into the
device, take proper precautions to avoid exposure to
ESD.
Lucent employs a human-body model (HBM) for ESD
susceptibility testing and protection-design evaluation.
ESD voltage thresholds are dependent on the critical
parameters used to define the model. A standard HBM
(resistance = 1.5 k
Ω
, capacitance = 100 pF) is widely
used and, therefore, can be used for comparison pur-
poses. The HBM ESD threshold established for the
2417J4A is
±
1000 V.
Data and Signal Detect Outputs
The data and signal detect outputs of the 2417 trans-
ceiver are driven by open-emitter NPN transistors,
which have an output impedance of approximately 7
Ω
.
Each output can provide approximately 50 mA maxi-
mum current to a 50
Ω
. load terminated to V
CC
– 2.0 V.
Due to the high switching speeds of ECL outputs,
transmission line design must be used to interconnect
components. To ensure optimum signal fidelity, both
data outputs (RD+/RD–) should be terminated identi-
cally. The signal lines connecting the data outputs to
the next device should be equal in length and have
matched impedances. Controlled impedance stripline
or microstrip construction must be used to preserve the
quality of the signal into the next component and to
minimize reflections back into the receiver, which could
degrade its performance. Excessive ringing due to
reflections caused by improperly terminated signal
lines makes it difficult for the component receiving
these signals to decipher the proper logic levels and
can cause transitions to occur where none were
intended. Also, by minimizing high-frequency ringing,
possible EMI problems can be avoided.
The signal-detect output is positive LVTTL logic. A logic
low at this output indicates that the optical signal into
the receiver has been interrupted or that the light level
has fallen below the minimum signal detect threshold.
This output should not be used as an error rate indica-
tor since its switching threshold is determined only by
the magnitude of the incoming optical signal.
Application Information
The 2417 receiver section is a highly sensitive fiber-
optic receiver. Although the data outputs are digital
logic levels (PECL), the device should be thought of as
an analog component. When laying out system applica-
tion boards, the 2417 transceiver should receive the
same type of consideration one would give to a sensi-
tive analog component.
Printed-Wiring Board Layout Consider-
ations
A fiber-optic receiver employs a very high gain, wide
bandwidth transimpedance amplifier. This amplifier
detects and amplifies signals that are only tens of nA in
amplitude when the receiver is operating near its sensi-
tivity limit. Any unwanted signal currents that couple
into the receiver circuitry cause a decrease in the
receiver's sensitivity and can also degrade the perfor-
mance of the receiver's signal detect (SD) circuit. To
minimize the coupling of unwanted noise into the
receiver, careful attention must be given to the printed-
wiring board layout.
At a minimum, a double-sided printed-wiring board
(PWB) with a large component-side ground plane
beneath the transceiver must be used. In applications
that include many other high-speed devices, a multi-
layer PWB is highly recommended. This permits the
placement of power and ground on separate layers,
which allows them to be isolated from the signal lines.
*
EIA
is a registered trademark of Electronic Industries Association.
Lucent Technologies Inc.
3
NetLight
2417J4A 1300 nm Laser
Gigabit Transceiver
Data Sheet
January 2000
Application Information
(continued)
Transceiver Processing
When the process plug is placed in the transceiver's optical port, the transceiver and plug can withstand normal
wave soldering and aqueous spray cleaning processes. However, the transceiver is not hermetic, and should not
be subjected to immersion in cleaning solvents. The transceiver case should not be exposed to temperatures in
excess of 125
°
C. The transceiver pins can be wave soldered at 250
°
C for up to 10 seconds. The process plug
should only be used once. After removing the process plug from the transceiver, it must not be used again as a pro-
cess plug; however, if it has not been contaminated, it can be reused as a dust cover.
Transceiver Optical and Electrical Characteristics
Table 2. Transmitter Optical and Electrical Characteristics
(T
A
= 0
°
C to 70
°
C; V
CC
= 3.135 V—3.465 V)
Parameter
Average Optical Output Power (EOL):
Single-mode Fiber (10
µ
m)
Optical Wavelength
Spectral Width
Dynamic Extinction Ratio
Rise/Fall Time, 20%—80%
Power Supply Current
Input Data Voltage:
Low
High
Transmit Disable Voltage
Transmit Enable Voltage
Symbol
P
O
λ
C
∆λ
RMS
EXT
t
R
/t
F
I
CCT
V
IL
V
IH
V
D
V
EN
–11.0
1270
—
9
—
—
V
CC
– 2.0
V
CC
– 1.2
V
CC
– 1.3
V
EE
–3.0
1355
4
—
260
150
V
CC
– 1.6
V
CC
– 0.8
V
CC
V
EE
+ 0.8
dBm
nm
nm
dB
ps
mA
V
V
V
V
Min
Max
Unit
Table 3. Receiver Optical and Electrical Characteristics
(T
A
= 0
°
C to 70
°
C; V
CC
= 3.135 V—3.465 V)
Parameter
Average Sensitivity*
Maximum Input Power*
Return Loss
Link Status Switching Threshold:
Decreasing Light
Increasing Light
Link Status Hysteresis
Power Supply Current
Output Data Voltage/Clock Voltage:
Low
High
Signal-detect Voltage:
Low
High
* For 1 x 10
–10
BER with an optical input using 2
23
– 1 PRBS.
Symbol
P
I
P
MAX
—
LST
D
LST
I
HYS
I
CCR
V
OL
V
OH
V
OL
V
OH
Min
–19
—
12
—
—
0.5
—
V
CC
– 1.81
V
CC
– 1.025
0.0
2.4
Max
—
–3
—
–20.5
–20.0
—
100
V
CC
– 1.62
V
CC
– 0.88
0.8
V
CC
Unit
dBm
dBm
dB
dBm
dBm
dB
mA
V
V
V
V
4
Lucent Technologies Inc.
Data Sheet
January 2000
NetLight
2417J4A 1300 nm Laser
Gigabit Transceiver
Qualification and Reliability
To help ensure high product reliability and customer satisfaction, Lucent is committed to an intensive quality pro-
gram that starts in the design phase and proceeds through the manufacturing process. Optoelectronic modules are
qualified to Lucent’s internal standards using MIL-STD-883 test methods and procedures and using sampling tech-
niques consistent with
Telcordia Technologies
* requirements. The 2417 transceiver is required to pass an exten-
sive and rigorous set of qualification tests.
This qualification program fully meets the intent of
Telcordia Technologies
reliability practices TR-NWT-000468 and
TA-TSY-000983 requirements. In addition, the design, development, and manufacturing facilities of Lucent Tech-
nologies Microelectronics Group Optoelectronics unit have been certified to be in full compliance with the latest
ISO
†
9001 quality system standards.
*
Telcordia Technologies
is a registered trademark of Bell Communications Research, Inc.
†
ISO
is a registred trademark of The International Organization for Standardization.
Electrical Schematic
V
EET
TD–
TRANSMITTER
DRIVER
100
Ω
R
TD+
7
10
9
V
CCT
SFF TRANSCEIVER
V
CCR
6
C4
2
L2
V
CC
C5
L1
C1
L1 = L2 = 1
µH—4.7 µH*
C1 = C2 = 10 nF
†
C3 = 4.7
µF—10 µF
C4 = C5 = 4.7
µF—10 µF
C2
RD+
PREAMP
RECEIVER
POST-
AMPLIFIER
RD–
5
4
C3
SD
V
EER
3
1
1-968 (F).a
* Ferrite beads can be used as an option.
† For all capacitors, MLC caps are recommended.
Figure 2. Power Supply Filtering for the Small Form Factor Transceiver
Lucent Technologies Inc.
5
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