NetLight
2417K4A 1300 nm Laser
2.5 Gbits/s Transceiver
Data Sheet, Rev. 1
August 2001
Available in a small form-factor, RJ-45 size, plastic package,
the 2417K4A Transceiver is a high-performance, cost-effec-
tive, optical transceiver for SONET applications.
Features
s
SONET SR OC-48, SDH I-16 applications
s
High-speed, optical data interface for shelf-to-shelf
interconnect
s
Small form factor, RJ-45 size, 10-pin package
s
LC duplex receptacle
s
Uncooled 1300 nm laser transmitter with automatic
output power control
s
Transmitter disable input
s
Wide dynamic range receiver with InGaAs PIN
photodetector
s
TTL signal-detect output
s
Low power dissipation
s
Single 3.3 V power supply
s
LVPECL/CML compatible data inputs and CML
compatible data outputs
s
Operating temperature range: 0
C to
70
C
s
Agere Systems Inc. Reliability and Qualification
Program for built-in quality and reliability
Description
The 2417K4A transceiver is a high-speed, cost-effec-
tive optical transceiver intended for 2.488 Gbits/s
shelf-to-shelf optical interconnect applications as well
as SONET SR OC-48 and SDH I-16. The transceiver
features proven Agere Systems optics and is pack-
aged in a narrow-width plastic housing with an LC
duplex receptacle. The receptacle fits into an RJ-45
form factor outline. The 10-pin package pinout con-
forms to a multisource transceiver agreement.
The transmitter features the ability to interface to both
LVPECL and CML differential logic level data inputs.
It also features a TTL logic level disable input. The
receiver features differential CML logic level outputs
and a TTL logic level signal-detect output.
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
2
Agere Systems Inc.
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.
Pin Information
Figure 1. 2417K4A Transceiver, 10-Pin Configuration, Top View
Parameter
Symbol
Min
Max
Unit
Supply Voltage
V
CC
0
5
V
Operating Case Temperature Range
T
C
0
70
C
Storage Temperature Range
T
stg
40
85
C
Lead Soldering Temperature/Time
--
--
250/10
C/s
Operating Wavelength Range
1.1
1.6
m
Table 1. Transceiver Pin Descriptions
Pin
Number
Symbol
Name/Description
Logic
Family
Receiver
MS
MS
Mounting Studs. The mounting studs are provided for transceiver
mechanical attachment to the circuit board. They may also provide an
optional connection of the transceiver to the equipment chassis
ground.
NA
1
V
EER
Receiver Signal Ground.
NA
2
V
CCR
Receiver Power Supply.
NA
3
SD
Signal Detect.
Normal operation: logic one output.
Fault condition: logic zero output.
LVTTL
4
RD
Received
DATA
Out.
CML
5
RD+
Received DATA Out.
CML
Transmitter
6
V
CCT
Transmitter Power Supply.
NA
7
V
EET
Transmitter Signal Ground.
NA
8
T
DIS
Transmitter Disable.
LVTTL
9
TD+
Transmitter DATA In. An internal 50
termination is provided, con-
sisting of a 100
resistor between the TD+ and TD pins.
LVPECL
or CML
10
TD
Transmitter
DATA
In. See TD+ pin for terminations.
LVPECL
or CML
RX
TX
1
2
3
4
5
10
9
8
7
6
1-967
Agere Systems Inc.
3
Data Sheet, Rev. 1
NetLight
2417K4A 1300 nm Laser
August 2001
2.5 Gbits/s Transceiver
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.
Agere Systems 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
, capacitance =
100 pF) is widely used and, therefore, can be used for
comparison purposes. The HBM ESD threshold
established for the 2417K4A transceiver is
1000 V.
Application Information
The 2417 receiver section is a highly sensitive fiber-
optic receiver. Although the data outputs are digital
logic levels (CML), the device should be thought of as
an analog component. When laying out system appli-
cation 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.
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.
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 a pi filter, shown in Figure 3, be
used for both the transmitter and receiver power
supplies.
Data and Signal Detect Outputs
Due to the high switching speeds of CML 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.
Figure 2. Data Input/Output Logic Level Definitions
DATA
SINGLE ENDED
V
OH
V
OL
DATA
V
OH
V
OL
DIFFERENTIAL
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
4
Agere Systems Inc.
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
* 50 load, measured single ended. Differential operation is necessary for optimum performance. (See Figure 2 for visual representation.)
TTL compatible interface.
* 2
23
1 PRBS with a BER of 1 x 10
10
.
50 load, measured single ended. Differential operation is necessary for optimum performance.(See Figure 2 for visual representation.)
TTL compatible interface.
Table 2. Transmitter Optical and Electrical Characteristics (T
C
= 0
C to 70
C; V
CC
= 3.135 V--3.465 V)
Parameter
Symbol
Min
Max
Unit
Average Optical Output Power (EOL)
P
O
10.0
3.0
dBm
Optical Wavelength
C
1266
1360
nm
Spectral Width
RMS
--
4
nm
Dynamic Extinction Ratio
EXT
8.2
--
dB
Output Optical Eye
Compliant with SONET GR-253-CORE and
ITU-T G.957 Eye Mask Requirements
Power Supply Current
I
CCT
--
190
mA
Input Data Voltage:
Single Ended*
Differential*
V
INp-p
V
INp-p
150
300
800
1600
mVp-p
mVp-p
Transmit Disable Voltage
V
D
V
CC
0.9
V
CC
V
Transmit Enable Voltage
V
EN
V
EE
V
EE
+ 0.8
V
Table 3. Receiver Optical and Electrical Characteristics (T
C
= 0
C to 70
C; V
CC
= 3.135 V--3.465 V)
Parameter
Symbol
Min
Max
Unit
Average Sensitivity:*
800 mV (CML) Differential Input To Transmitter
P
I
--
18
dBm
Maximum Input Power*
P
MAX
3
--
dBm
Power Supply Current
I
CCR
--
110
mA
Output Data Voltage:
Single Ended
Differential
V
OUTp-p
V
OUTp-p
300
600
500
1000
mVp-p
mVp-p
Signal-detect Switching Threshold:
Assert
Deassert
LST
D
LST
I
45
--
19
18.5
dBm
dBm
Signal-detect Hysteresis
HYS
0.5
6
dB
Signal-detect Voltage:
Low
High
V
OL
V
OH
0.0
2.4
0.8
V
CC
V
V
Signal-detect Response Time
SDRT
--
100
s
Data Sheet, Rev. 1
NetLight
2417K4A 1300 nm Laser
August 2001
2.5 Gbits/s Transceiver
Agere Systems Inc.
5
Qualification and Reliability
To help ensure high product reliability and customer satisfaction, Agere Systems is committed to an intensive qual-
ity program that starts in the design phase and proceeds through the manufacturing process. Optoelectronic mod-
ules are qualified to Agere Systems internal standards as well as other appropriate industry standards using MIL-
STD-883 test methods and procedures and using sampling techniques consistent with
Telcordia Technologies
requirements.
In addition, the design, development, and manufacturing facilities of Agere Systems Optoelectronics unit are certi-
fied to be in full compliance with the latest
ISO
-9001 quality system standards.
Electrical Schematic
*
Ferrite beads can be used as an option.
For all capacitors, MLC caps are recommended
Figure 3. Power Supply Filtering of SFF Transceiver
L1 = L2 = 1
H--4. 7
H*
C1 = C2 = 10 nF
C3 = 4.7
F--10
F
C4 = C5 = 4.7
F--10
F
TRANSMITTER
DRIVER
RECEIVER
POST-
AMPLIFIER
TD
TD+
100
R
V
EET
7
10
9
PREAMP
RD+
RD
SD
V
EER
V
CCT
V
CCR
SFF TRANSCEIVER
5
4
3
1
6
2
C4
C5
C2
C3
C1
V
CC
L2
L1
1-968(F).a
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
6
Agere Systems Inc.
Electrical Data Interface--Current Mode Logic (CML)
Figure 4. 3.3 V Transceiver Interface with 3.3 V ICs and CML
TD+
100
CML
V
CC
(+3.3 V)
V
CC
(+3.3 V)
(A) TRANSMITTER INTERFACE--dc COUPLED--(CML)
RD+
RD
CML
V
CC
(+3.3 V)
V
CC
(+3.3 V)
(B) RECEIVER INTERFACE--dc COUPLED--(CML)
Z = 50
Z = 50
Z = 50
Z = 50
TD
1-1033(F).c
Data Sheet, Rev. 1
NetLight
2417K4A 1300 nm Laser
August 2001
2.5 Gbits/s Transceiver
Agere Systems Inc.
7
Alternate Electrical Data Interface Options
Figure 5. 3.3 V Transceiver Interface with 3.3 V ICs
TD+
100
LVPECL
130
130
V
CC
(+3.3 V)
V
CC
(+3.3 V)
(A) TRANSMITTER INTERFACE--ac OR dc COUPLED--(LVPECL)
RD+
RD
CML
V
CC
(+3.3 V)
V
CC
(+3.3 V)
(B) RECEIVER INTERFACE--ac COUPLED--(CML)
Z = 50
Z = 50
Z = 50
Z = 50
TD
0.1
F*
0.1
F*
0.1
F
0.1
F
* OPTIONAL ac COUPLING CAPACITORS; USE CERAMIC X7R
OR EQUIVALEN T
1-1033(F).b
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
8
Agere Systems Inc.
Outline Diagrams
Package Outline
Dimensions are in inches and (millimeters).
0.160 (4.06)
1.914
0.535 MAX
0.386 MAX
0.700
0.734
0.280
0.014
0.070 (1.78)
(13.59)
(48.62)
(0.36)
(9.80)
(7.11)
(17.78)
(18.64)
0.018
(0.46)
0.150
0.246
(3.81)
(10.16)
0.400
(6.25)
1-1032(F).d
Data Sheet, Rev. 1
NetLight
2417K4A 1300 nm Laser
August 2001
2.5 Gbits/s Transceiver
Agere Systems Inc.
9
Outline Diagrams
(continued)
Printed-Wiring Board Layout
*
,
Dimensions are in inches and (millimeters).
* The hatched areas are keep-out areas reserved for housing standoffs. No metal traces of ground connection in keep-out area.
Twenty-pin module shown; 10-pin module requires only 16 PWB holes.
A
6.00
3.00
3.08
(0.121)
2.00 (0.79)
(0.236)
(0.118)
(2x)
2.29 MAX
(0.090)
(2x)
2.29 MAX
(0.090)
(2x)
1.4
0.1 NOTE 1
(0.055
0.004)
AREA FOR EYELETS
2.01
(0.79)
9.59
(0.378)
10.16
(0.400)
13.34
(0.525)
7.59
(0.299)
3.00
(0.118)
(4x)
1.4
0.1 NOTE 2
(0.055
0.004)
0.00 M A
0.00 M A
4.57
(0.180)
7.11
(0.280)
8.89
(0.350)
(9x) 1.78
(0.070)
16.00 REF
(0.630)
3.56
(0.140)
(2x)
0.81
0.1
(0.032
0.004)
0.00 M A
1. HOLES FOR MOUNTING STUDS MUST BE TIED TO CHASSIS GROUND.
2. HOLES FOR HOUSING LEADS MUST BE TIED TO SIGNAL GROUND.
NOTES:
1-1271(F)
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
10
Agere Systems Inc.
Outline Diagrams
(continued)
Recommended Panel Opening
Dimensions are in inches and (millimeters).
1-1088(F).d
0.560
(14.22)
0.400
(10.16)
0.039 TO 0.098
(1.00 TO 2.49)
0.590 TO 0.620
(14.99 TO 15.75)
Data Sheet, Rev. 1
NetLight
2417K4A 1300 nm Laser
August 2001
2.5 Gbits/s Transceiver
Agere Systems Inc.
11
Laser Safety Information
Class I Laser Product
FDA/CDRH Class I laser product. All versions of the transceiver are Class I laser products per CDRH, 21 CFR
1040 Laser Safety requirements. All versions are Class I laser products per
IEC
60825-1:1993. The transceiver
has been certified with the FDA under accession number 9520668.
CAUTION: Use of controls, adjustments, and procedures other than those specified herein may result in
hazardous laser radiation exposure.
This product complies with 21 CFR 1040.10 and 1040.11.
Wavelength = 1.3
m
Maximum power = 1.0 mW
Because of size constraints, laser safety labeling is not affixed to the module but is attached to the outside of the
shipping carton.
Product is not shipped with power supply.
NOTICE
Unterminated optical connectors may emit laser radiation.
Do not view with optical instruments.
NetLight
2417K4A 1300 nm Laser
Data Sheet, Rev. 1
2.5 Gbits/s Transceiver
August 2001
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
NetLight
is a registered trademark of Agere Systems Inc.
Copyright 2001 Agere Systems Inc.
All Rights Reserved
August 2001
DS00-107OPTO-1 (Replaces DS00-107OPTO)
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@agere.com
N. AMERICA:
Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA:
Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000, FAX (852) 3129-2020
CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)
EUROPE:
Tel. (44) 7000 624624, FAX (44) 1344 488 045
Ordering Information
EIA
is a registered trademark of The Electronic Industries Association.
Telcordia Technologies
is a registered trademark of Telcordia Technologies, Inc.
ISO
is a registered trademark of The International Organization for Standardization.
IEC
is a registered trademark of The International Electrotechnical Commission.
Description
Device Code
Comcode
2.5 Gbits/s 2 x 5 SFF LC Transceiver
2417K4A
108685587
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ZIP