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PDF QFBR-5208M Data sheet ( Hoja de datos )
| Número de pieza | QFBR-5208M | |
| Descripción | Fiber Optic Transceivers | |
| Fabricantes | Agilent Technologies | |
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Agilent HFBR/HFCT-5208M 1 x 9
Fiber Optic Transceivers for 622 Mb/s
ATM/SONET/SDH Applications
Data Sheet
Description
General
The HFBR-5208M (multimode
transceiver) and HFCT-5208M
(single-mode transceiver) from
Agilent allow the system designer
to implement a range of solutions
for ATM/SONET STS-12/SDH
STM-4 applications.
The overall Agilent transceiver
consists of three sections: the
transmitter and receiver optical
subassemblies, an electrical
subassembly and the mezzanine
package housing which
incorporates a duplex SC
connector receptacle.
Transmitter Section
The transmitter section of the
HFBR-5208M consists of a 1300 nm
LED in an optical subassembly
(OSA) which mates to the multi-
mode fiber cable. The HFCT-5208M
incorporates a 1300 nm Fabry
Perot (FP) laser in the optical
subassembly. In addition, this
package has been designed to be
compliant with IEC 825 eye-safety
requirements under any single
fault condition. The OSA’s are
driven by a custom, silicon bipolar
IC which converts differential
PECL logic signals (ECL
referenced to a +5 V supply) into
an analog LED/laser drive current.
Applications
HFBR-5208M:
• General purpose low-cost MMF
links at 155 to 650 Mb/s
• ATM 622 Mb/s MMF links from
switch-to-switch or switch-to-
server in the end-user premise
• Private MMF interconnections at
622 Mb/s SONET STS-12/SDH
STM-4 rate
HFCT-5208M:
• ATM 622 Mb/s SMF links from
switch-to-switch or switch-to-
server in the end-user premise
• Private SMF interconnections at
622 Mb/s SONET STS-12/SDH
STM-4 rate
622 Mb/s Product Family
HFCT-5218M:
• 1300 nm laser-based transceiver
in 1 x 9 package for links of 40 km
with single-mode fiber cables
Features
• Performance
HFBR-5208M:
Links of 500 m with 62.5/125 µm
multimode fiber (MMF) from
155-622 Mb/s
HFCT-5208M:
Links of 15 km with 9/125 µm
single-mode fiber (SMF)
• Compliant with ATM forum
622.08 Mb/s physical layer
specification (AF-PHY-0046.000)
• Compliant with ANSI broadband
ISDN - physical layer
specification T1.646-1995 and
T1.646a-1997
• HFBR-5208M is compliant with
ANSI network to customer
installation interfaces -
synchronous optical NETwork
(SONET) physical media
dependent specification:
multimode fiber T1.416.01-1998
• HFCT-5208M is compliant to the
intermediate SONET OC12/SDH
STM(S4.1) specifications
• Industry-standard multi-sourced
1 x 9 mezzanine package style
• Single +5 V power supply
operation and PECL logic
interfaces
• Wave solder and aqueous wash
process compatible
• Unconditionally eye safe laser IEC
825/CDRH Class 1 compliant
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1 page  
Reference Design
Agilent has developed a reference
design for multimode and single-
mode OC-12 ATM-SONET/SDH
applications shown in Figure 6.
This reference design uses a
Vitesse Semiconductor Inc.’s
VSC8117 clock recovery/clock
generation/serializer/deserializer
integrated circuit and a PMC-
Sierra Inc. PM5355 framer IC.
Application Note 1178 documents
the design, layout, testing and
performance of this reference
design. Gerber files, schematic
and application note are available
from the Agilent Fiber-Optics
Components’ web site at the URL
of http://www.semiconductor.
agilent.com.
20.32
(0.800)
20.32
(0.800)
2.54
(0.100)
TOP VIEW
DIMENSIONS ARE IN MILLIMETERS (INCHES)
Figure 5. Recommended Board Layout Pattern
2 x Ø 1.9 ± 0.1
(0.075 ± 0.004)
9 x Ø 0.8 ± 0.1
(0.032 ± 0.004)
Operation in -5.2 V Designs
For applications that require
-5.2 V dc power supply level for
true ECL logic circuits, the
HFBR/HFCT-5208M transceiver
can be operated with a VCC = 0 V
dc and a VEE = -5.2 V dc. This
transceiver is not specified with
an operating, negative power
supply voltage. The potential
compromises that can occur with
use of -5.2 V dc power are that the
absolute voltage states for VOH
and VOL will be changed slightly
due to the 0.2 V difference in
supply levels. Also, noise
immunity may be compromised
for the HFBR/HFCT-5208M trans-
ceiver because the ground plane is
now the VCC supply point. The
suggested power supply filter
circuit shown in the Recommended
Circuit Schematic figure should be
located in the VEE paths at the
transceiver supply pins. Direct
coupling of the differential data
signal can be done between the
HFBR-5208M transceiver and the
standard ECL circuits. For
guaranteed -5.2 V dc operation,
contact your local Agilent
Component Field Sales Engineer
for assistance.
Figure 6. 622.08 Mb/s OC-12 ATM-SONET/SDH Reference Design Board
Electromagnetic Interference (EMI)
One of a circuit board designer’s
foremost concerns is the control
of electromagnetic emissions
from electronic equipment.
Success in controlling generated
Electromagnetic Interference
(EMI) enables the designer to pass
a governmental agency’s EMI
regulatory standard; and more
importantly, it reduces the
possibility of interference to
neighboring equipment. There are
three options available for the
HFBR/HFCT-5208M with regard to
EMI shielding for providing the
designer with a means to achieve
good EMI performance. The EMI
performance of an enclosure
using these transceivers is
dependent on the chassis design.
Agilent encourages using standard
RF suppression practices and
avoiding poorly EMI-sealed
enclosures. In addition, Agilent
advises that for the best EMI
performance, the metalized case
must be connected to chassis
ground using one of the shield
options.
5
5 Page 
HFBR-5208M Family, 1300 nm LED
Transmitter Electrical Characteristics
(TA = 0°C to +70°C, VCC = 4.75 to 5.25 V. Typical @+25°C, 5 V)
(TA = -40°C to +85°C, VCC = 4.75 to 5.25 V. Typical @+25°C, 5 V for A specification part)
Parameter
Symbol Minimum Typical
Supply Current
Power Dissipation
Data Input Current - Low
Data Input Current -High
ICCT
PDIST
IIL
IIH
-350
155
0.75
Maximum
200
1.05
350
Unit
mA
W
µA
µA
Notes
1
Receiver Electrical Characteristics
(TA = 0°C to +70°C, VCC = 4.75 to 5.25 V. Typical @+25°C, 5 V)
(TA = -40°C to +85°C, VCC = 4.75 to 5.25 V. Typical @+25°C, 5 V for A specification part)
Parameter
Symbol Minimum Typical
Supply Current
Power Dissipation
Data Output Voltage - Low
Data Output Voltage - High
Data Output Rise Time
Data Output Fall Time
Signal Detect Output Voltage - Low
Signal Detect Output Voltage - High
Signal Detect Assert Reaction Time
(Off to On)
ICCR
PDISR
VOL - VCC
VOH - VCC
tR
tF
VOL - VCC
VOH - VCC
tSDA
-1.950
-1.045
0.2
0.2
-1.950
-1.045
112
0.37
-1.82
-0.94
0.3
0.3
-1.82
-0.94
35
Signal Detect Deassert Reaction Time
(On to Off)
tSDD
60
Maximum
177
0.77
-1.620
-0.740
0.51
0.51
-1.620
-0.740
100
Unit
mA
W
V
V
ns
ns
V
V
µs
350 µs
Notes
2
3
3
4
4
3
3
5
6
Notes:
1. The ICC value is held nearly constant to minimize unwanted electrical noise from being generated and conducted or emitted to
neighboring circuitry.
2. Power dissipation value is the power dissipated in the receiver itself. It is calculated as the sum of the products of VCC and ICC minus the sum
of the products of the output voltages and load currents.
3. These outputs are compatible with 10K, 10KH and 100K ECL and PECL inputs.
4. These are 20% - 80% values.
5. The Signal Detect output will change from logic “VOL” to “VOH” within 100 µs of a step transition in input optical power from no light to -26 dBm.
6. The Signal Detect output will change from logic “VOH” to “VOL” within 350 µs of a step transition in input optical power from -26 dBm to no light.
11
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