HP HFBR-25X6 125 megabaud versatile link the versatile fiber optic connection Datasheet

125 Megabaud Versatile Link
The Versatile Fiber Optic
Connection
Technical Data
Features
• Data Transmission at Signal
Rates of 1 to 125 MBd over
Distances of 100 Meters
• Compatible with Inexpensive, Easily Terminated
Plastic Optical Fiber, and
with Large Core Silica Fiber
• High Voltage Isolation
• Transmitter and Receiver
Application Circuit Schematics and Recommended
Board Layouts Available
• Interlocking Feature for
Single Channel or Duplex
Links, in a Vertical or
Horizontal Mount
Configuration
Applications
• Intra-System Links: Boardto-Board, Rack-to-Rack
• Telecommunications
Switching Systems
• Computer-to-Peripheral
Data Links, PC Bus
Extension
• Industrial Control
• Proprietary LANs
• Digitized Video
• Medical Instruments
HFBR-0507 Series
HFBR-15X7 Transmitters
HFBR-25X6 Receivers
• Reduction of Lightning and
Voltage Transient
Susceptibility
Description
The 125 MBd Versatile Link
(HFBR-0507 Series) is the most
cost-effective fiber-optic solution
for transmission of 125 MBd data
over 100 meters. The data link
consists of a 650 nm LED
transmitter, HFBR-15X7, and a
PIN/preamp receiver, HFBR25X6. These can be used with
low-cost plastic or silica fiber.
One mm diameter plastic fiber
provides the lowest cost solution
for distances under 25 meters.
The lower attenuation of silica
fiber allows data transmission
over longer distance, for a small
difference in cost. These components can be used for high speed
data links without the problems
common with copper wire
solutions, at a competitive cost.
The HFBR-15X7 transmitter is a
high power 650 nm LED in a low
cost plastic housing designed to
efficiently couple power into 1
mm diameter plastic optical fiber
and 200 µm Hard Clad Silica
(HCS®) fiber. With the recommended drive circuit, the LED
operates at speeds from 1-125
MBd. The HFBR-25X6 is a high
bandwidth analog receiver containing a PIN photodiode and
internal transimpedance amplifier.
With the recommended application circuit for 125 MBd
operation, the performance of the
complete data link is specified for
of 0-25 meters with plastic fiber
and 0-100 meters with 200 µm
HCS® fiber. A wide variety of
other digitizing circuits can be
combined with the HFBR-0507
Series to optimize performance
and cost at higher and lower data
rates.
HCS® is a registered trademark of Spectran Corporation.
5965-6114E (1/97)
17
HFBR-0507 Series
125 MBd Data Link
Data link operating conditions
and performance are specified for
the HFBR-15X7 transmitter and
HFBR-25X6 receiver in the
recommended applications
circuits shown in Figure 1. This
circuit has been optimized for 125
MBd operation. The Applications
Engineering Department in the
Hewlett-Packard Optical
Communication Division is
available to assist in optimizing
link performance for higher or
lower speed operation.
Recommended Operating Conditions for the Circuits in Figures 1 and 2.
Parameter
Symbol
Min.
Max.
Unit
Ambient Temperature
TA
0
70
°C
Supply Voltage
VCC
+4.75
+5.25
V
Data Input Voltage – Low
VIL
VCC -1.89
VCC -1.62
V
Data Input Voltage – High
VIH
VCC -1.06
VCC -0.70
V
Data Output Load
RL
45
55
Ω
Signaling Rate
fS
1
125
MBd
D.C.
40
60
%
Duty Cycle
Reference
Note 1
Note 2
Link Performance: 1-125 MBd, BER ≤ 10-9, under recommended operating conditions with
recommended transmit and receive application circuits.
Symbol
Min.[3]
OPBPOF
11
16
dB
Note 5,6,7
Optical Power Margin,
20 m Standard POF
OPMPOF,20
3
6
dB
Note 5,6,7
Link Distance with
Standard 1 mm POF
l
20
27
m
Optical Power Margin,
25 m Low Loss POF
OPMPOF,25
3
6
dB
l
25
32
m
OPBHCS
7
12
dB
Note 5,6,7
OPMHCS,100
3
6
dB
Note 5,6,7
l
100
125
m
Parameter
Optical Power Budget, 1 m POF
Link Distance with Extra
Low Loss 1 mm POF
Optical Power Budget, 1 m HCS
Optical Power Margin,
100 m HCS
Link Distance with HCS Cable
Typ.[4] Max.
Unit
Condition
Reference
Note 5,6,7
Notes:
1. If the output of U4C in Figure 1, page 4 is transmitted via coaxial cable, terminate with a 50 Ω resistor to VCC - 2 V.
2. Run length limited code with maximum run length of 10 µs.
3. Minimum link performance is projected based on the worst case specifications of the HFBR-15X7 transmitter, HFBR-25X6 receiver,
and POF cable, and the typical performance of other components (e.g. logic gates, transistors, resistors, capacitors, quantizer,
HCS cable).
4. Typical performance is at 25°C, 125 MBd, and is measured with typical values of all circuit components.
5. Standard cable is HFBR-RXXYYY plastic optical fiber , with a maximum attenuation of 0.24 dB/m at 650 nm and NA = 0.5.
Extra low loss cable is HFBR-EXXYYY plastic optical fiber, with a maximum attenuation of 0.19 dB/m at 650 nm and NA = 0.5.
HCS cable is HFBR-H/VXXYYY glass optical fiber, with a maximum attenuation of 10 dB/km at 650 nm and NA = 0.37.
6. Optical Power Budget is the difference between the transmitter output power and the receiver sensitivity, measured after
1 meter of fiber. The minimum OPB is based on the limits of optical component performance over temperature, process, and
recommended power supply variation.
7. The Optical Power Margin is the available OPB after including the effects of attenuation and modal dispersion for the minimum
link distance: OPM = OPB - (attenuation power loss + modal dispersion power penalty). The minimum OPM is the margin
available for longterm LED LOP degradation and additional fixed passive losses (such as in-line connectors) in addition to the
minimum specified distance.
18
Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit:
Performance of the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for POF; 1125 MBd, 25°C.
Parameter
Symbol
Typical
Unit
Condition
Note
Average Optical Power 1 mm POF
Pavg
-9.7
dBm
50% Duty
Cycle
Note 1, Fig 3
Average Modulated Power 1 mm POF
Pmod
-11.3
dBm
Optical Rise Time (10% to 90%)
tr
2.1
ns
5 MHz
Optical Fall Time (90% to 10%)
tf
2.8
ns
5 MHz
High Level LED Current (On)
IF,H
19
mA
Note 3
Low Level LED Current (Off)
IF,L
3
mA
Note 3
45
%
110
mA
Optical Overshoot - 1 mm POF
Transmitter Application Circuit
Current Consumption - 1 mm POF
ICC
Note 2, Fig 3
Figure 1
Hard Clad Silica Fiber (200 µm HCS) Transmitter Application Circuit: Performance of
the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for HCS; 1-125 MBd, 25°C.
Parameter
Symbol
Typical
Unit
Condition
Note
Average Optical Power 200 µm HCS
Pavg
-14.6
dBm
50% Duty
Cycle
Note 1, Fig 3
Average Modulated Power 200 µm HCS
Pmod
-16.2
dBm
Optical Rise Time (10% to 90%)
tr
3.1
ns
5 MHz
Optical Fall Time (90% to 10%)
tf
3.4
ns
5 MHz
High Level LED Current (On)
IF,H
60
mA
Note 3
Low Level LED Current (Off)
IF,L
6
mA
Note 3
30
%
130
mA
Optical Overshoot - 200 µm HCS
Transmitter Application Circuit
Current Consumption - 200 µm HCS
ICC
Note 2, Fig 3
Figure 1
Notes:
1. Average optical power is measured with an average power meter at 50% duty cycle, after 1 meter of fiber.
2. To allow the LED to switch at high speeds, the recommended drive circuit modulates LED light output between two non-zero power
levels. The modulated (useful) power is the difference between the high and low level of light output power (transmitted) or input
power (received), which can be measured with an average power meter as a function of duty cycle (see Figure 3). Average Modulated
Power is defined as one half the slope of the average power versus duty cycle:
[Pavg @ 80% duty cycle - Pavg @ 20% duty cycle]
Average Modulated Power = ––——————————————————————
(2) [0.80 - 0.20]
3. High and low level LED currents refer to the current through the HFBR-15X7 LED. The low level LED “off” current, sometimes
referred to as “hold-on” current, is prebias supplied to the LED during the off state to facilitate fast switching speeds.
19
Plastic and Hard Clad Silica Optical Fiber Receiver Application Circuit:
Performance[4] of the HFBR-25X6 receiver in the recommended application circuit (Figure 1); 1-125 MBd,
25°C unless otherwise stated.
Parameter
Data Output Voltage - Low
Data Output Voltage - High
Receiver Sensitivity to Average
Modulated Optical Power 1 mm POF
Receiver Sensitivity to Average
Modulated Optical Power 200 µm HCS
Receiver Overdrive Level of Average
Modulated Optical Power 1 mm POF
Receiver Overdrive Level of Average
Modulated Optical Power 200 µm HCS
Receiver Application Circuit Current
Consumption
Symbol
VOL
VOH
Pmin
Typical
VCC -1.7
VCC -0.9
-27.5
Unit
V
V
dBm
Condition
RL = 50 Ω
RL = 50 Ω
50% eye opening
Note
Note 5
Note 5
Note 2
Pmin
-28.5
dBm
50% eye opening
Note 2
Pmax
-7.5
dBm
50% eye opening
Note 2
Pmax
-10.5
dBm
50% eye opening
Note 2
ICC
85
mA
RL = ∞
Figure 1
Notes:
4. Performance in response to a signal from the HFBR-15X7 transmitter driven with the recommended circuit at 1-125 MBd over 1 meter
of HFBR-R/EXXYYY plastic optical fiber or 1 meter of HFBR-H/VXXYYY hard clad silica optical fiber.
5. Terminated through a 50 Ω resistor to VCC - 2 V.
6. If there is no input optical power to the receiver, electrical noise can result in false triggering of the receiver. In typical applications,
data encoding and error detection prevent random triggering from being interpreted as valid data. Refer to Applications Note 1066 for
design guidelines.
L1
CB70-1812
C1
0.001
VCC
C2
0.1
R5
22
14
9
10 U1C
C3
0.1
C4
0.001
C5
10
+
7 74ACTQ00
Q1
BFQ52
R6
91
9
8
7
6
5
4
3
2
J1 1
TX VEE
Q2 BASE
Q1 BASE
TX VCC
RX VCC
NC
PIN 19 10H116
PIN 18 10H116
RX VEE
Q2
BFQ52
1
2
12
13 U1D
3
U1A
+
11
8
U2
5 HFBR-15X7
Q3
2N3904
74ACTQ00
R9*
74ACTQ00
R7
91
4
5 U1B
6
VCC
VBB
R10
15
C8*
C19
0.1
R12
4.7
C10
0.1
R11*
ALL CAPACITOR VALUES
ARE IN MICRO FARADS,
WITH 10% TOLERANCE
(UNLESS OTHERWISE NOTED).
C9
.47
3V
R24
1K
C17
0.1
R22
1K
R18
51
C16
0.1
MC10H116FN
18
19
U4C
15
17
C15
0.1
R25
1K
R23
1K
VBB
C18
0.1
R13
4.7
R16
51
MC10H116FN
4 10
7
3 U4A 5
R19
51
20
MC10H116FN
9 14
13
8 U4B 12
R17
51
2
ALL RESISTANCES ARE IN
OHMS WITH 5% TOLERANCE
(UNLESS OTHERWISE NOTED).
VBB
R14
1K
8
C12
0.1
R15
1K
C11
0.1
1
2
3
4
U3
5 HFBR-25X6
3V
VCC
R20
12
R21
62
VBB
+ C14
10
U5
C13
0.1
TL431
Figure 1. Transmitter and Receiver Application Circuit with +5 V ECL Inputs and Outputs.
20
C7
0.001
1
2
3
4
R8*
74ACTQ00
C20
10
C6
0.1
8
THE VALUES OF R8, R9, R11, AND
C8 ARE DIFFERENT FOR POF AND
HCS DRIVE CIRCUITS.
R8
R9
R11
C8
POF
HCS TOLERANCE
300
82
1%
300
82
1%
1K
470
1%
43 pF 120 pF
1%
120 Ω
120 Ω
+5 V ECL
SERIAL DATA
SOURCE
82 Ω
0.1 µF
9 TX VEE
82 Ω
8 TD
+
5V
7 TD
–
4.7 µH
+
10 µF
6 TX VCC
0.1 µF
0.1 µF
5 RX VCC
82 Ω
10 µF
82 Ω
0.1 µF
+
4
4.7 µH
FIBER-OPTIC
TRANSCEIVER
SHOWN IN
FIGURE 1
3 RD
+5 V ECL
SERIAL DATA
RECEIVER
2 RD
120 Ω
120 Ω
1 RX VEE
4.7 µH
Figure 2. Recommended Power Supply Filter and +5 V ECL Signal Terminations for
the Transmitter and Receiver Application Circuit of Figure 1.
21
200
OPTICAL POWER BUDGET –dB
AVERAGE POWER – µW
POF
150
100
AVERAGE
MODULATED
POWER
50
AVERAGE POWER,
50% DUTY CYCLE
0
0
20
40
60
80
DUTY CYCLE – %
Figure 3. Average Modulated Power.
100
19
17
15
HCS
13
11
9
10
30
50
70
90
110
130
150
DATA RATE – MBd
Figure 4. Typical Optical Power
Budget vs. Data Rate.
21
125 Megabaud Versatile Link
Transmitter
HFBR-15X7 Series
Description
The HFBR-15X7 transmitters
incorporate a 650 nanometer LED
in a horizontal (HFBR-1527) or
vertical (HFBR-1537) gray
housing. The HFBR-15X7
transmitters are suitable for use
with current peaking to decrease
response time and can be used
with HFBR-25X6 receivers in data
links operating at signal rates
from 1 to 125 megabaud over 1
mm diameter plastic optical fiber
or 200 µm diameter hard clad
silica glass optical fiber. Refer to
Application Note 1066 for details
for recommended interface
circuits.
GROUND
ANODE
CATHODE
GROUND
GROUND
1
2
3
4
GROUND
SEE NOTE 6
Absolute Maximum Ratings
Symbol
Min.
Max.
Unit
Storage Temperature
Parameter
TS
-40
85
°C
Operating Temperature
TO
-40
70
°C
Lead Soldering Temperature
260
°C
Cycle Time
Transmitter High Level Forward
Input Current
10
s
IF,H
120
mA
Transmitter Average Forward Input Current
IF,AV
60
mA
VR
3
V
Reverse Input Voltage
Reference
Note 1
50% Duty Cycle
≥ 1 MHz
CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in
handling and assembly of this component to prevent damage and/or degradation which may be induced by
ESD.
WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAY
EXPOSE THE EYE BEYOND THE MAXIMUM PERMISSIBLE EXPOSURE RECOMMENDED
IN ANSI Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD.
22
Electrical/Optical Characteristics 0 to 70°C, unless otherwise stated.
Parameter
Symbol
Min.
Typ.[2]
Max.
Unit
Condition
Note
Transmitter Output
Optical Power, 1 mm POF
PT
-9.5
-10.4
-7.0
-4.8
-4.3
dBm
IF,dc = 20 mA, 25°C
0-70°C
Note 3
Transmitter Output
Optical Power, 1 mm POF
PT
-6.0
-6.9
-3.0
-0.5
-0.0
dBm
IF,dc = 60 mA, 25°C
0-70°C
Note 3
Transmitter Output
Optical Power,
200 µm HCS®
PT
-14.6
-15.5
-13.0
-10.5
-10.0
dBm
IF,dc = 60 mA, 25°C
0-70°C
Note 3
Output Optical Power
Temperature Coefficient
∆PT
∆T
Peak Emission Wavelength
λPK
Peak Wavelength
Temperature Coefficient
∆λ
∆T
0.12
nm/°C
FWHM
21
nm
Full Width,
Half Maximum
V
IF = 60 mA
Spectral Width
Forward Voltage
VF
-0.02
640
1.8
650
2.1
dB/°C
660
2.4
nm
Forward Voltage
Temperature Coefficient
∆VF
∆T
-1.8
Transmitter Numerical
Aperture
NA
0.5
Thermal Resistance,
Junction to Case
θjc
140
°C/W
Reverse Input Breakdown
Voltage
VBR
13
V
IF,dc = -10 µA
Diode Capacitance
CO
60
pF
VF = 0 V,
f = 1 MHz
Unpeaked Optical Rise
Time, 10% - 90%
tr
12
ns
IF = 60 mA
f = 100 kHz
Figure 1
Note 5
Unpeaked Optical Fall
Time, 90% - 10%
tf
9
ns
IF = 60 mA
f = 100 kHz
Figure 1
Note 5
3.0
mV/°C
Note 4
Notes:
1. 1.6 mm below seating plane.
2. Typical data is at 25°C.
3. Optical Power measured at the end of 0.5 meter of 1 mm diameter plastic or 200 µm diameter hard clad silica optical fiber with a large
area detector.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1527. θjc is approximately 30°C/W
higher for vertical mount package, HFBR-1537.
5. Optical rise and fall times can be reduced with the appropriate driver circuit; refer to Application Note 1066.
6. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically
unconnected. It is recommended that pins 3, 4, 5, and 8 all be connected to ground to reduce coupling of electrical noise.
7. Refer to the Versatile Link Family Fiber Optic Cable and Connectors Technical Data Sheet for cable connector options for 1 mm
plastic optical fiber and 200 µm HCS fiber.
8. The LED current peaking necessary for high frequency circuit design contributes to electromagnetic interference (EMI). Care must be
taken in circuit board layout to minimize emissions for compliance with governmental EMI emissions regulations. Refer to Application
Note 1066 for design guidelines.
23
BCP MODEL 300
500 MHz
BANDWIDTH
SILICON
AVALANCHE
PHOTODIODE
HP54002A
50 OHM BNC
INPUT POD
50 OHM
LOAD
RESISTOR
HP54100A
OSCILLOSCOPE
NORMALIZED SPECTRAL OUTPUT POWER
1.2
HP8082A
PULSE
GENERATOR
0° C
1.0
25° C
0.8
70° C
0.6
0.4
0.2
0
620
630
640
650
660
670
680
WAVELENGTH (nm)
Figure 1. Test Circuit for Measuring
Unpeaked Rise and Fall Times.
Figure 2. Typical Spectra Normalized
to the 25°C Peak.
0
PT – NORMALIZED OUTPUT POWER – dB
VF – FORWARD VOLTAGE – V
2.4
0° C
2.2
25° C
70° C
2.0
1.8
1.6
1
10
100
IF,DC – TRANSMITTER DRIVE CURRENT (mA)
Figure 3. Typical Forward Voltage vs.
Drive Current.
24
-5
0° C
-10
-15
25° C
70° C
-20
-25
1
10
100
IF,DC – TRANSMITTER DRIVE CURRENT (mA)
Figure 4. Typical Normalized Output
Optical Power vs. Drive Current.
125 Megabaud Versatile Link
Receiver
HFBR-25X6 Series
Description
The HFBR-25X6 receivers contain
a PIN photodiode and
transimpedance pre-amplifier
circuit in a horizontal (HFBR2526) or vertical (HFBR-2536)
blue housing, and are designed to
interface to 1mm diameter plastic
optical fiber or 200 µm hard clad
silica glass optical fiber. The
receivers convert a received
optical signal to an analog output
voltage. Follow-on circuitry can
optimize link performance for a
variety of distance and data rate
requirements. Electrical
bandwidth greater than 65 MHz
allows design of high speed data
links with plastic or hard clad
silica optical fiber. Refer to
Application Note 1066 for details
for recommended interface
circuits.
GROUND
4
3
2
1
VCC
GROUND
GROUND
SIGNAL
GROUND
SEE NOTES 2, 4, 9
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Unit
Storage Temperature
TS
-40
+75
°C
Operating Temperature
TA
0
+70
°C
260
°C
10
s
Lead Soldering Temperature
Cycle Time
Signal Pin Voltage
VO
-0.5
VCC
V
Supply Voltage
VCC
-0.5
6.0
V
Output Current
IO
25
mA
Reference
Note 1
CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in
handling and assembly of this component to prevent damage and/or degradation which may be induced by
ESD.
25
Electrical/Optical Characteristics 0 to 70°C; 5.25 V ≥ VCC ≥ 4.75 V; power supply must be filtered
(see Figure 1, Note 2).
Parameter
Symbol
Min.
Typ.
Max.
Unit
Test Condition
Note
AC Responsivity 1 mm POF
RP,APF
1.7
3.9
6.5
mV/µW
650 nm
Note 4
AC Responsivity 200 µm HCS
RP,HCS
4.5
7.9
11.5
mV/µW
VNO
0.46
0.69
mVRMS
Note 5
Equivalent Optical Noise Input
Power, RMS - 1 mm POF
PN,RMS
- 39
-36
dBm
Note 5
Equivalent Optical Noise Input
Power, RMS - 200 µm HCS
PN,RMS
-42
-40
dBm
Note 5
-5.8
dBm
5 ns PWD
-6.4
dBm
2 ns PWD
-8.8
dBm
5 ns PWD
-9.4
dBm
2 ns PWD
Ω
50 MHz
PR = 0 µW
RMS Output Noise
Peak Input Optical Power 1 mm POF
Peak Input Optical Power 200 µm HCS
Output Impedance
PR
PR
ZO
DC Output Voltage
VO
Supply Current
ICC
Electrical Bandwidth
BWE
Bandwidth * Rise Time
30
0.8
65
1.8
2.6
V
9
15
mA
125
MHz
0.41
Hz * s
Note 6
Note 6
Note 4
-3 dB electrical
Electrical Rise Time, 10-90%
tr
3.3
6.3
ns
PR = -10 dBm
peak
Electrical Fall Time, 90-10%
tf
3.3
6.3
ns
PR = -10 dBm
peak
PWD
0.4
1.0
ns
PR = -10 dBm
peak
Note 7
%
PR = -10 dBm
peak
Note 8
Pulse Width Distortion
Overshoot
4
Notes:
1. 1.6 mm below seating plane.
2. The signal output is an emitter follower, which does not reject noise in the power supply. The power supply must be filtered as in
Figure 1.
3. Typical data are at 25°C and VCC = +5 Vdc.
4. Pin 1 should be ac coupled to a load ≥ 510 Ω with load capacitance less than 5 pF.
5. Measured with a 3 pole Bessel filter with a 75 MHz, -3dB bandwidth.
6. The maximum Peak Input Optical Power is the level at which the Pulse Width Distortion is guaranteed to be less than the PWD listed
under Test Condition. PR,Max is given for PWD = 5 ns for designing links at ≤ 50 MBd operation, and also for PWD = 2 ns for
designing links up to 125 MBd (for both POF and HCS input conditions).
7. 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform.
8. Percent overshoot is defined at:
(VPK - V100%)
––––––––––––
× 100%
V100%
9. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected. It is recommended that these pins be
connected to ground to reduce coupling of electrical noise.
10. If there is no input optical power to the receiver (no transmitted signal) electrical noise can result in false triggering of the receiver.
In typical applications, data encoding and error detection prevent random triggering from being interpreted as valid data. Refer to
Application Note 1066 for design guidelines.
26
Figure 1. Recommended Power Supply Filter Circuit.
Figure 2. Simplified Receiver Schematic.
Figure 3. Typical Pulse Width
Distortion vs. Peak Input Power.
Figure 4. Typical Output Spectral
Noise Density vs. Frequency.
Figure 5. Typical Rise and Fall Time
vs. Temperature..
27
Versatile Link Mechanical Dimensions
HORIZONTAL MODULES
HFBR-1527
HFBR-2526
HORIZONTAL MODULES
HFBR-1537
HFBR-2526
Versatile Link Printed Circuit Board Layout Dimensions
HFBR-15X7
28
Similar pages