ATM Multimode Fiber
Transceivers
for SONET OC-3/SDH STM-1 in
Low Cost 1x9 Package Style
Technical Data
Features
Full Compliance with ATM
Forum UNI SONET OC-3
Multimode Fiber Physical
Layer Specification
Multisourced 1 x 9 Package
Style with Choice of Duplex
SC or Duplex ST* Receptacle
Wave Solder and Aqueous
Wash Process Compatibility
Manufactured in an ISO 9002
Certified Facility
Applications
Multimode Fiber ATM
Backbone Links
Multimode Fiber ATM
Wiring Closet to Desktop
Links
Very Low Cost Multimode
Fiber 800 nm ATM Wiring
Closet to Desktop Links
ATM 155 Mbps/194 MBd
Encoded Links (available
upon special request)
Description
The HFBR-5200 family of trans-
ceivers from Agilent Technologies
provide the system designer with
products to implement a range of
solutions for multimode fiber
SONET OC-3 (SDH STM-1)
physical layers for ATM and other
services.
These transceivers are all
supplied in the new industry
standard 1x9 SIP package style
with either a duplex SC or a
duplex ST* connector interface.
ATM 2000 m Backbone Links
The HFBR-5205/-5205T are
1300 nm products with optical
performance compliant with the
SONET STS-3c (OC-3) Physical
Layer Interface Specification. This
physical layer is defined in the
ATM Forum User-Network Inter-
face (UNI) Specification Version
3.0. This document references the
ANSI T1E1.2 specification for the
details of the interface for 2000
meter multimode fiber backbone
links.
Selected versions of these
transceivers may be used to
implement the ATM Forum UNI
Physical Layer Interface at the
155 Mbps/194 MBd rate.
The ATM 100 Mbps/125 MBd
Physical Layer interface is best
implemented with the HFBR-5100
family of FDDI Transceivers
which are specified for use in this
4B/5B encoded physical layer per
the FDDI PMD standard.
ATM 500 m Backbone and
Desktop Links
The HFBR-5204/-5204T are 1300
nm products which are similar to
the HFBR-5205/5205T except
that they are intended to provide
a lower cost SONET OC-3 link to
distances up to 500 meters in
62.5/125
m multimode fiber
optic cables.
Very Low Cost ATM 300 m
Desktop Links
The HFBR-5203/-5203T are very
low cost 800 nm alternatives to
the HFBR-5204/-5204T for
SONET OC-3 links to distances up
to 300 meters in 62.5/125
m
multimode fiber optic cables.
Transmitter Sections
The transmitter sections of the
HFBR-5204 and HFBR-5205
series utilize 1300 nm InGaAsP
LEDs and the HFBR-5203 series
HFBR-5203/-5203T
800 nm 300 m
HFBR-5204/-5204T
1300 nm 500 m
HFBR-5205/-5205T
1300 nm 2 km
*ST is a registered trademark of AT&T Lightguide Cable Connectors.
2
design complies with the
maximum height allowed for the
duplex SC connector over the
entire length of the package.
The optical subassemblies utilize
a high volume assembly process
together with low cost lens
elements which result in a cost
effective building block.
The electrical subassembly con-
sists of a high volume multilayer
printed circuit board on which the
IC chips and various surface-
mounted passive circuit elements
are attached.
The package includes internal
shields for the electrical and
optical subassemblies to insure
low EMI emissions and high
immunity to external EMI fields.
The outer housing including the
duplex SC connector or the
duplex ST ports is molded of filled
non-conductive plastic to provide
mechanical strength and electrical
isolation. The solder posts of the
Agilent design are isolated from
the circuit design of the
transceiver and do not require
connection to a ground plane on
the circuit board.
The transceiver is attached to a
printed circuit board with the nine
signal pins and the two solder
posts which exit the bottom of the
housing. The two solder posts
provide the primary mechanical
strength to withstand the loads
imposed on the transceiver by
mating with the duplex or simplex
SC or ST connectored fiber
cables.
Note: The "T" in the product
numbers indicates a transceiver
with a duplex ST connector
receptacle. Product numbers
without a "T" indicate transceivers
with a duplex SC connector
receptacle.
Application Information
The Applications Engineering
group in the Agilent Optical
Communication Division is
available to assist you with the
technical understanding and
design trade-offs associated with
these transceivers. You can con-
tact them through your Agilent
sales representative.
Figure 1. Block Diagram.
DATA OUT
SIGNAL
DETECT OUT
DATA IN
ELECTRICAL SUBASSEMBLY
QUANTIZER IC
DRIVER IC
TOP VIEW
PIN PHOTODIODE
DUPLEX SC
RECEPTACLE
OPTICAL
SUBASSEMBLIES
LED
PREAMP IC
DIFFERENTIAL
SINGLE-ENDED
DIFFERENTIAL
uses a low cost 800 nm AlGaAs
LED. These LEDs are packaged in
the optical subassembly portion
of the transmitter section. They
are driven by a custom silicon IC
which converts differential PECL
logic signals, ECL referenced
(shifted) to a +5 Volt supply, into
an analog LED drive current.
Receiver Sections
The receiver sections of the
HFBR-5204 and HFBR-5205
series utilize InGaAs PIN photo-
diodes coupled to a custom
silicon transimpedance preampli-
fier IC. The HFBR-5203 series
uses the same preamplifier IC in
conjunction with an inexpensive
silicon PIN photodiode. These are
packaged in the optical subassem-
bly portion of the receiver.
These PIN/preamplifier combina-
tions are coupled to a custom
quantizer IC which provides the
final pulse shaping for the logic
output and the Signal Detect
function. The data output is
differential. The signal detect
output is single-ended. Both data
and signal detect outputs are
PECL compatible, ECL referenced
(shifted) to a +5 volt power
supply.
Package
The overall package concept for
the Agilent transceivers consists
of three basic elements; the two
optical subassemblies, an
electrical subassembly, and the
housing as illustrated in the block
diagrams in Figure 1 and
Figure 1a.
The package outline drawing and
pin out are shown in Figures 2,
2a, and 3. The details of this
package outline and pin out are
compliant with the multisource
definition of the 1x9 SIP. The low
profile of the Agilent transceiver
3
DATA OUT
SIGNAL
DETECT OUT
DATA IN
ELECTRICAL SUBASSEMBLY
QUANTIZER IC
DRIVER IC
TOP VIEW
PIN PHOTODIODE
DUPLEX ST
RECEPTACLE
OPTICAL
SUBASSEMBLIES
LED
PREAMP IC
DIFFERENTIAL
SINGLE-ENDED
DIFFERENTIAL
Figure 2. Package Outline Drawing.
Figure 1a. ST Block Diagram.
39.12
(1.540)
MAX.
AREA
RESERVED
FOR
PROCESS
PLUG
12.70
(0.500)
25.40
(1.000)
MAX.
12.70
(0.500)
10.35
(0.407)
MAX.
+ 0.25
- 0.05
+ 0.010
- 0.002
3.30 0.38
(0.130 0.015)
HFBR-5XXX
DATE CODE (YYWW)
SINGAPORE
2.92
(0.115)
18.52
(0.729)
4.14
(0.163)
20.32
(0.800)
[8x(2.54/.100)]
23.55
(0.927)
16.70
(0.657)
17.32
(0.682)
20.32
(0.800)
23.32
(0.918)
0.46
(0.018)
NOTE 1
(9x)
NOTE 1
0.87
(0.034)
23.24
(0.915)
15.88
(0.625)
NOTE 1: THE SOLDER POSTS AND ELECTRICAL PINS ARE PHOSPHOR BRONZE WITH TIN LEAD OVER NICKEL PLATING.
DIMENSIONS ARE IN MILLIMETERS (INCHES).
1.27
(0.050
+ 0.08
- 0.05
+ 0.003
- 0.002
0.75
(0.030
)
)
A
4
Figure 3. Pin Out Diagram.
25.4
(1.000)
MAX.
24.8
(0.976)
42
(1.654)
MAX.
5.99
(0.236)
12.7
(0.500)
12.0
(0.471)
MAX.
0.5
(0.020)
3.3 0.38
(0.130) ( 0.015)
+ 0.08
- 0.05
+ 0.003
- 0.002
+ 0.25
- 0.05
+ 0.010
- 0.002
20.32 0.38
( 0.015)
HFBR-5103T
DATE CODE (YYWW)
SINGAPORE
3.2
(0.126)
2.6
(0.102)
22.86
(0.900)
20.32
(0.800)
[(8x (2.54/0.100)]
17.4
(0.685)
21.4
(0.843)
20.32
(0.800)
3.6
(0.142)
1.3
(0.051)
23.38
(0.921)
18.62
(0.733)
NOTE 1: PHOSPHOR BRONZE IS THE BASE MATERIAL FOR THE POSTS & PINS
WITH TIN LEAD OVER NICKEL PLATING.
DIMENSIONS IN MILLIMETERS (INCHES).
(
(
(
(
0.46
(0.022)
NOTE 1
1 = V
EE
2 = RD
3 = RD
4 = SD
5 = V
CC
6 = V
CC
7 = TD
8 = TD
9 = V
EE
TOP VIEW
N/C
N/C
Figure 2a. ST Package Outline Drawing.
5
Agilent LED technology has
produced 800 nm LED and 1300
nm LED devices with lower aging
characteristics than normally
associated with these technolo-
gies in the industry. The industry
convention is 3 dB aging for 800
nm and 1.5 dB aging for 1300 nm
LEDs. The 1300 nm HP LEDs are
specified to experience less than
1 dB of aging over normal
commercial equipment mission
life periods. Contact your Agilent
sales representative for additional
details.
Figure 4 was generated for the
1300 nm transceivers with an
Agilent fiber optic link model
containing the current industry
conventions for fiber cable
specifications and the draft ANSI
T1E1.2. These optical parameters
are reflected in the guaranteed
performance of the transceiver
specifications in this data sheet.
This same model has been used
extensively in the ANSI and IEEE
committees, including the ANSI
T1E1.2 committee, to establish
the optical performance
requirements for various fiber
optic interface standards. The
cable parameters used come from
the ISO/IEC JTC1/SC 25/WG3
Generic Cabling for Customer
Premises per DIS 11801 docu-
ment and the EIA/TIA-568-A
Commercial Building
Telecommunications Cabling
Standard per SP-2840.
The HFBR-5203 series 800 nm
transceiver curve in Figure 4 was
generated based on extensive
empirical test data of the 800 nm
transceiver performance. The
curve includes the effect of typical
fiber attenuation, plus receiver
sensitivity loss due to chromatic
and metal dispersion losses
through the fiber.
Transceiver Signaling
Operating Rate Range and BER
Performance
For purposes of definition, the
symbol (Baud) rate, also called
signaling rate, is the reciprocal of
the symbol time. Data rate (bits/
sec) is the symbol rate divided by
the encoding factor used to
encode the data (symbols/bit).
When used in 155 Mbps SONET
OC-3 applications the perform-
ance of the 1300 nm transceivers,
HFBR-5204/5205 is guaranteed
to the full conditions listed in
individual product specification
tables.
The transceivers may be used for
other applications at signaling
rates different than 155 Mbps
with some variation in the link
optical power budget. Figure 5
gives an indication of the typical
performance of these products at
different rates.
These transceivers can also be
used for applications which
require different Bit Error Rate
(BER) performance. Figure 6
The following information is
provided to answer some of the
most common questions about
the use of these parts.
Transceiver Optical Power
Budget versus Link Length
Optical Power Budget (OPB) is
the available optical power for a
fiber optic link to accommodate
fiber cable losses plus losses due
to in-line connectors, splices,
optical switches, and to provide
margin for link aging and
unplanned losses due to cable
plant reconfiguration or repair.
Figure 4 illustrates the predicted
OPB associated with the three
transceivers series specified in
this data sheet at the Beginning of
Life (BOL). These curves repre-
sent the attenuation and chromatic
plus modal dispersion losses
associated with the 62.5/125
m
and 50/125
m fiber cables only.
The area under the curves
represents the remaining OPB at
any link length, which is available
for overcoming non-fiber cable
losses.
Figure 4. Optical Power Budget vs. Fiber Optic Cable Length.
OPTICAL POWER BUDGET (dB)
0
FIBER OPTIC CABLE LENGTH (km)
0.5
1.5
2.0
2.5
12
10
8
6
4
2
1.0
0.3
HFBR-5205, 62.5/125 m
HFBR-5205,
50/125 m
HFBR-5203,
62.5/125 m
HFBR-5204,
62.5/125 m
HFBR-5203,
50/125 m
HFBR-5204,
50/125 m
PDF 
ZIP