AGERE 1417K6S Datasheet
Data Sheet, Rev. 1
September 2001
NetLight
®
1417K6S 2.5 Gbits/s
1300 nm Laser Transceiver
Available in a small form factor, RJ-45 size, plastic package,
the 1417K6S Transceiver is a high-perf ormance, cost-effective, optical transceiver for SONET/SDH app li cations.
Features
■
Small form factor, RJ-45 size, 20-pin package
■
LC duplex receptacle
■
Uncooled 1300 nm laser transmitter with automatic
output power control
■
Transmitter disable input
■
Wide dynamic range receiver with InGaAs PIN
photodetector
■
Laser bias and back-facet PIN monitors
■
TTL signal-detect output
Applications
■
SONET SR OC-48, SDH I-16 applications
■
High-speed, optical data inte rface for shelf-to-shelf
interconnect
Description
The 1417K6S transceiv er i s a hi gh- speed, cost-effective optical transceiver intended for 2.488 Gbits/s
shelf-to-shelf optical interconnect appli cations as well
as SONET SR OC-48 and SDH I-16. The transceiver
features proven Agere Systems optics and is packaged in a narrow-width plastic housing with an LC
duplex receptacle. The receptacle fits into an RJ-45
form factor outline. The 20-pin package pinout conforms to a multisource transceiver agreement.
The transmitter f eatures the abil ity to interf ace to both
LVPECL and CML differential logic level data inputs.
The transmitter also f eatures a TTL logic le v el disab le
input and laser bias and back-facet monitor outputs.
The receiver features differential CML logic level
data, a TTL logic lev el signal- detect output and direct
access to the PIN photodetector bias input for photocurrent monitoring purposes.
■
Low power dissipation
■
Single 3.3 V power supply
■
LVPECL/CML compatible data inputs and CML
compatible data outputs
■
Operating temperature range: 0 °C to
70 °C
■
Agere Systems Inc. Reliability and Qualification
Program for built-in quality and reliability
NetLight
1417K6S 2.5 Gbits/s Data Sheet, Rev. 1
1300 nm Laser Transceiver September 2001
Absolute Maximum Rat ings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute 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 s ections of the data sheet. Exposure to absolute maximum ratings fo r extended
periods can adversely affect device reliability.
Parameter Symbol Min Max Unit
Supply Voltage V
Operating Temperature Range T
Storage Temperature Range T
CC
stg
05V
C
070°C
–40 85 °C
Lead Soldering Temperature/Time — — 250/10 °C/s
Operating Wavelength Range λ 1.1 1.6 µm
Qualification and Reliabilit y
To help ensure high product reliability and customer satisfaction, Agere Systems is committed to an intensive quality program that starts in the design phase and proceeds through the manufacturing process. Optoelectronic modules are qualified to Agere Systems internal standards as well as other appropriate industry standards using MILSTD-883 test methods and procedures, and using sampling techniques consistent with
In addition, Agere Systems has been certified to be in full compliance with the latest
Telcordia
ISO
®
Standards.
®
requirements.
9001 Quality System
Pin Information
R
678910
1514131211
12345
2019181716
X
T
X
Figure 1. 1417K6S Transceiver, 20-Pin Configuration (top view)
1-967(F).d
2 Agere Systems Inc.
Data Sheet, Rev. 1
NetLight
1417K6S 2.5 Gbits/s
September 2001 1300 nm Laser Transceiver
Pin Information
(continued)
Table 1. Transceiver Pin Descriptions
Pin
Symbol Name/Description Logic Family
Number
MS MS
Mounting Studs.
mechanical attachment to the circuit board. The y ma y also provi de an
optional connection of the transceiver to the equipment chassis
ground.
1V
PD
Photodetector Bias Input.
detector diode
2V
3V
EER
EER
4NIC
5NIC
6V
7V
EER
CCR
8SD
Receiver Signal Ground.
Receiver Signal Ground.
No Internal Connection.
No Internal Connection.
Receiver Signal Ground.
Receiver Power Supply.
Signal Detect.
Normal operation: logic 1 output.
Fault condition: logic 0 output
9RD–
10 RD+
11 V
12 V
13 T
CCT
EET
DIS
14 TD+
Received
DAT A
Received DATA Out.
Transmitter Power Supply.
Transmitter Signal Ground.
Transmitter Disable.
Transmitter DATA In
sisting of a 100 Ω resistor between the TD+ and TD– pins.
15 TD–
16
17 B
NIC
MON
Transmitter
DATA
No Internal Connection.
Laser Diode Bias Current Monitor, Negative End.
–
current is accessible as a dc voltage by measuring the voltage devel-
oped across pins 17 and 18.
18 B
MON
+
Laser Diode Bias Current Monitor, Positive End.
if not used, do not connect. See pin 17 description.
19 P
MON
–
Laser Diode Optical Power Monitor, Negative End.
ture; if not used, do not connect. The back-facet diode monitor cur-
rent is accessible as a voltage proportional to the photocurrent
through a 200 Ω resistor between pins 19 and 20.
20 P
MON
Laser Diode Optical Power Monitor, Positive End.
+
ture; if not used, do not connect. See pin 19 description.
Receiver
The mounting studs are provided for transceiver
This lead supplies bia s for the PIN photo-
Out.
Transmitter
. An internal 50 Ω termination is provided, con-
In
. See TD+ pin for terminations. LVPECL/CML
LVPECL/CML
The laser bias
Optional feature;
Optional fea-
Optional fea-
NA
NA
NA
NA
NA
NA
NA
NA
LVTTL
CML
CML
NA
NA
LVTTL
NA
NA
NA
NA
NA
Agere Systems Inc. 3
NetLight
1417K6S 2.5 Gbits/s Data Sheet, Rev. 1
1300 nm Laser Transceiver September 2001
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
dard
-625.
EIA
®
Stan-
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 kΩ, capacitance =
100 pF) is widely used and, therefore, can be used for
comparison purposes. The HBM ESD threshold
established for the 1417K6S transceiver is ±1000 V.
Application Information
The 1417 receiver section is a highly sensitive fiberoptic receiver. Although the data outputs are digital
logic levels (CML), the device should be thought of as
an analog component. When laying out system application boards, the 1417 transceiver should receive the
same type of consideration typicall y given t o a sensitiv e
analog component.
Printed-Wiring Board Layout Considerations
A fiber-optic receiver employs a very high gain, widebandwidth transimpedance amplifier. This amplifier
detects and amplifies signals that are only tens of nA in
amplitude when the receiver is operating near its sensitivity limit. Any unwanted signal currents that couple
into the receiver circuitry cause a decrease in the
receiver's sensitivity and can also degrade the performance 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 printedwiring 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 multilayer 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 sensitive 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 should be terminated identically. The signal lines connecting the data outputs to the ne xt 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 was intended. Also, by minimizing high-frequency ringing, possible EMI problems
can be avoided.
The signal-detect output is positiv e LVTTL logic. A logic
low at this output indicates that the optical signal into
the receiver has been interrupted or that the light leve l
has fallen below the minimum signal-detect threshold.
This output should not be used as an error rate indicator, since its switching threshold is determined only by
the magnitude of the incoming optical signal.
SINGLE ENDED
V
OH
DATA
V
OL
DIFFERENTIAL
V
OH
DATA
V
OL
Figure 2. Data Input/Output Logic Level Definitions
4 Agere Systems Inc.
Data Sheet, Rev. 1
NetLight
1417K6S 2.5 Gbits/s
September 2001 1300 nm Laser Transceiver
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
process 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
Parameter Symbol M in Max Unit
Average Optical Output Power (EOL) P
Optical Wavelength λ
Spectral Width ∆λ
Dynamic Extinction Ratio EXT 8.2 — dB
Output Optical Eye Compliant with SONET GR-253-CORE and
Power Supply Current I
Input Data Voltage:
Single Ended*
Differential*
Transmit Disable Voltage
Transmit Enable Voltage
†
†
Transmit Enable Time T
Transmit Disable Time T
Laser Bias Voltage V
Laser Back-facet Monitor Voltage V
* 50 Ω load, measured single ended. Differential operation is necessary for optimum performance. (See Figure 2 for visual representation.)
† TTL compatible interface.
(T
= 0 °C to 70 °C; VCC = 3.135 V—3.465 V)
A
O
C
RMS
–10.0 –3.0 dBm
1266 1360 nm
—4nm
ITU-T G.957 Eye Mask Requirements
V
V
CCT
INp-p
INp-p
V
V
DIS
BIAS
D
EN
EN
BF
—150mA
150
300
VCC – 0.9 V
EE
V
800
1600
CC
VEE + 0.8 V
—20ms
—10µs
0.0 0.7 V
0.01 0.2 V
mVp-p
mVp-p
V
Agere Systems Inc. 5
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