Data Sheet
AFBR-2529SIZ
DC-50MBd Versatile Link Fiber-Optic Receiver
with Monitoring Output for 1 mm POF and
200 µm PCS
Description
The Broadcom
®
AFBR-2529SIZ receiver consists of an IC
with an integrated photodiode providing a TTL logic family
compatible output.
The receiver operates any type of signal from DC up to
50 MBd at distances up to 50m with 1 mm Polymer Optical
Fiber (POF), up to 200m at 10 MBd and 120m at 50 MBd
with 200 µm Plastic-Clad Silica (PCS), respectively.
It is a 4-pin device, packed in Versatile Link housing.
Versatile Link components can be interlocked (N-plexed
together) to minimize space and to provide dual connections
with the duplex connectors.
The AFBR-2529SIZ features a monitor output providing an
analog voltage proportional to the average optical input
power.
Various simplex and duplex connectors, as well as POF
cables are available for Versatile Link components.
For optical links with AFBR-2529SIZ, Broadcom’s
AFBR-16xxZ transmitters use a 650 nm LED source with
integrated optics and driver IC recommended.
The AFBR-2529SIZ delivers inverted output signals, which
means that LIGHT ON leads to Data out LOW and vice
versa.
Features
RoHS-compliant
Analog monitoring output (RSSI)
Data transmission at signal rates from DC up to 50 MBd
Integrated PIN diode and digitalizing IC with TTL output
logic
Up to 50m distance with 1 mm POF over operating
temperature range
Up to 200m (10 MBd) distance and 120m (50 MBd)
distance with 200 µm PCS over operating temperature
range
Operating temperature range of –40°C to +85°C
Receiver power supply of 3.3V or 5.0V
Compatible with the Broadcom’s Versatile Link family
of connectors, for easy termination of fiber
Applications
Optical receiver for 50-MBd systems and below:
Industrial control and factory automation
Extension of RS-232 and RS-485
High voltage isolation
Elimination of ground loops
Reduces voltage transient susceptibility
Advanced maintenance management of optical links by
monitoring the incoming optical receiver power
Available Options
Horizontal Package
AFBR-2529SIZ
Application Literature
Application Note 1035 (Versatile Link) – AV02-0730EN.
Broadcom
AFBR-2529SIZ-DS100
March 2, 2018
AFBR-2529SIZ
Data Sheet
DC-50MBd Versatile Link Fiber-Optic Receiver with Monitoring Output for 1 mm POF and
200 µm PCS
Package and Handling Information
The compact Versatile Link package is made of a flame-
retardant material and uses the same pad layout as a
standard, eight-pin dual-inline package. Horizontal
packages are available. These low-profile Versatile Link
packages are stackable and are enclosed to provide a dust-
resistant seal. Snap action simplex, simplex latching,
duplex, and duplex latching connectors are offered with
simplex or duplex cables.
Interlocked (Stacked) Assemblies
See
Figure 1.
Horizontal packages can be stacked by placing units with
pins facing upward. Initially engage the interlocking
mechanism by sliding the L bracket body from above into
the L slot body of the lower package. Use a straight edge,
such as a ruler, to bring all stacked units into uniform
alignment. This technique prevents potential harm that
could occur to fingers and hands of assemblers from the
package pins. Stacked horizontal packages can be
disengaged if necessary. Repeated stacking and unstacking
causes no damage to individual units.
It is recommended to interlock (stack) not more than four
compatible housings together.
Figure 1: Interlocked (Stacked) Horizontal Packages
Package Housing Color
Versatile Link components and simplex connectors are
color-coded to eliminate confusion when making
connections. Receiver packages are black, and transmitters
are grey.
Handling
Versatile Link components are auto-insertable. When wave
soldering is performed with Versatile Link components,
leave the optical port plug in to prevent contamination of the
port. Do not use reflow solder processes (that is, infrared
reflow or vapor-phase reflow). Use non-halogenated water
soluble fluxes (that is, 0% chloride), not rosin based fluxes,
with Versatile Link components.
Versatile Link components are moisture-sensitive devices
and are shipped in a moisture sealed bag. If the
components are exposed to air for an extended period of
time, they may require a baking step before the soldering
process. Refer to the special labeling on the shipping tube
for details.
Recommended Chemicals for Cleaning/
Degreasing
Alcohols: methyl, isopropyl, isobutyl.
Aliphatics: hexane, heptanes.
Other: soap solution, naphtha.
Do not use partially halogenated hydrocarbons, such as
1,1.1 trichloroethane, ketones, such as MEK, acetone,
chloroform, ethyl acetate, methylene dichloride, phenol,
methylene chloride, or N-methylpyrolldone. Broadcom does
not recommend the use of cleaners that use halogenated
hydrocarbons because of their potential environmental
harm.
Broadcom
AFBR-2529SIZ-DS100
2
AFBR-2529SIZ
Data Sheet
DC-50MBd Versatile Link Fiber-Optic Receiver with Monitoring Output for 1 mm POF and
200 µm PCS
Mechanical Dimensions
Figure 2: Mechanical Dimensions – Horizontal Packages
2
[0.08]
10.2
[0.40]
18.8
[0.74]
5.1
[0.20]
0.6
[0.03]
7.6
[0.30]
6.5
[0.26]
7.7
[0.30]
3.8
[
0.15
]
MAX.
3.6
[
0.14
]
MIN.
1.3
[0.05]
0.5
[0.02]
2.54
[0.100]
[
0.6 ]
3
0.0
NOTES:
1) Dimensions: mm [in]
2.8
[0.11]
1.7
[0.07]
Versatile Link Printed Board Layout Dimensions
Figure 3: PCB Dimensions – Horizontal Packages
7.62
[0.300]
2.54
[0.100]
1
[
4
3
2
1
0.0
4]
5
8
7.7
[0.30]
PCB EDGE
1.9 MIN.
[0.07]
Footprint - TOP VIEW
NOTES:
1) Dimensions: mm [in]
Broadcom
4.2
[0.17]
AFBR-2529SIZ-DS100
3
AFBR-2529SIZ
Data Sheet
DC-50MBd Versatile Link Fiber-Optic Receiver with Monitoring Output for 1 mm POF and
200 µm PCS
Analog Monitoring Output (RSSI)
The Receiver Signal Strength Indicator (RSSI) is a
monitoring output that delivers an output current
proportional to the average incoming optical power.
The integrating signal is directed to the RSSI output.
To provide a suitable monitoring voltage across the shunt
resistor, R
RSSI
, its value should be chosen to the particular
optical power situation of the specific application.
The lower the optical receiver power, the higher the resistor
value should be.
Do not, however, override the maximum limit of V
RSSI
.
The typical analog monitoring voltage, V
RSSI
, (across 2 k
shunt resistor) as a function of receiver optical input power
for industrial temperature range is shown in
Figure 5
and
Figure 6.
The monitoring voltage varies linearly with the receiver
optical input power. The variation overtemperature is
negligible for most applications.
For an almost noise-free RSSI-signal, smoothing
components are recommended. A capacitor, C
RSSI
, in
parallel to the resistor on the RSSI output reduces potential
high frequency signal parts. The use of a single 100 nF
capacitor for signal smoothing is sufficient in most common
applications, as shown in the recommended receiver
circuitry in
Figure 4.
If this RSSI function is not required, the output pin can be left
floating.
The RSSI-signal is derived from internal controlling loops;
therefore, the typical time constant of pure RSSI output
current without an external filter can be up to 1 ms. This time
constant also depends on the actual average incoming light
power.
The integrating (averaging) character of the RSSI output
together with the time constant result in a systemic
conditioned fluctuation of the RSSI output signal at very low
data rates and/or during data communications that show
relative long time intervals in which the optical input has
constant HIGH or LOW. This should be considered in the
application processing/polling of the RSSI output signal
accordingly.
Regulatory Compliance
Feature
Electrostatic Discharge (ESD) to the Electrical Pins Human Body Model
Test Method
MIL-STD-883 Method 3015
Performance
Min ± 2000 V
Process Compatibility
Parameter
Solder Environment
a,b
Symbol
T
SOLD
t
SOLD
a. Solder surface must be at least 1.6 mm below the lead frame stops.
b. The product is Moisture Sensitive Level 3.
c. Maximum temperature refers to peak temperature.
d. Maximum time refers to time spent at peak temperature.
Min.
—
—
Typical
—
—
Max.
260
c
10
d
Units
°C
seconds
Broadcom
AFBR-2529SIZ-DS100
4
AFBR-2529SIZ
Data Sheet
DC-50MBd Versatile Link Fiber-Optic Receiver with Monitoring Output for 1 mm POF and
200 µm PCS
Specified Link Performance, T
A
= –40°C to +85°C, 50 MBd
Parameter
Link Distance with Standard POF cable
a, b
Link Distance with 200 µm PCS (10 MBd)
b, c
Link Distance with 200 µm PCS (50 MBd)
b, c
Min.
0.1
0.1
0.1
Max.
50
200
120
Units
meters
meters
meters
Condition
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
a. HFBR-R/EXXYYYZ is the part number for 1 mm POF. Worst-case attenuation used (0.27 dB/m for standard loss POF cable from –40°C to
+85°C at 660 nm).
b. The optical link performance is guaranteed only with transmitters AFBR-16xxZ.
c. PCS, worst-case attenuation (12 dB/km from -40°C to +85°C at 650 nm).
Pin Description Receiver AFBR-2529SIZ
Fiber port facing front, pins downward, 1 = Rightmost pin to 4 = Leftmost pin.
Pin
1
2
3
4
5
8
Name
Data Out
a
V
EE
V
CC
RSSI
b
Housing Pin
c
Housing Pin
c
b. Analog monitoring output.
c. Pins 5 and 8 are for mounting and retaining purposes, and should be connected to chassis GND.
Function/Description
Data Output inverted
Ground
Power 3.3V ± 5% or 5.0V ± 5%
Receiver Signal Strength Indicator
Physical pin is available, recommended to chassis GND
Physical pin is available, recommended to chassis GND
a. TTL compatible data output provides an inverted signal, thus an electrical low in case of light on and vice versa.
Broadcom
AFBR-2529SIZ-DS100
5
