HFBR-1414TZ Avago Technologies US Inc., HFBR-1414TZ Datasheet - Page 18

• Manufacturer Part Number: HFBR-1414TZ
• Description: XMITTER FIBER OPTIC HIGH PWR ST
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-1414TZ

• Wavelength: 820nm
• Voltage - Forward (vf) Typ: 1.7V
• Current - Dc Forward (if): 100mA
• Voltage - Dc Reverse (vr) (max): 1.8V
• Capacitance: 55pF
• Connector Type: ST
• Function: High performance fiber optic communication links for information systems and industrial applications.
• Product: Transmitter
• Data Rate: 160 MBd
• Diode Capacitance: 55 pF
• Maximum Rise Time: 6.5 ns
• Maximum Fall Time: 6.5 ns
• Pulse Width Distortion: 7.56 ns
• Operating Supply Voltage: 7 VDC
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Spectral Bandwidth: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With: Multimode Glass, Hard Clad Silica
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-2039

Recommended Drive Circuits
The circuit used to supply current to the LED
transmitter can significantly influence the optical
switching characteristics of the LED. The optical rise/
fall times and propagation delays can be improved by
using the appropriate circuit techniques. The LED drive
circuit shown in Figure 11 uses frequency
compensation to reduce the typical rise/fall times of
the LED and a small pre-bias voltage to minimize
propagation delay differences that cause pulse-width
distortion. The circuit will typically produce rise/fall
18
R
R
R
R
C(pF)
Example
V
Y
X1
EQ2
X2
F
(V
can
All HFBR-14XXZ LED transmitters are classified as IEC 825-1 Accessible Emission Limit (AEL) Class 1 based upon the current
proposed draft scheduled to go in to effect on January 1, 1997. AEL Class 1 LED devices are considered eye safe. Contact
your Avago Technologies sales representative for more information.
CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to
damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly
of these components to prevent damage and/or degradation which may be induced by ESD.
(
CC
R
1
2
be
X3



)
2000
R
3.97
for
V
R
obtained
X1
R
F
Y
R
)
(
X1
X4
I



ps
F
3.97(V
)
I
ON
F
1
3(R
ON
from
100mA
(A)
EQ2
CC
)
Figure
V
F
:
1.6V)
( 9
1.84
V)
.
times of 3 ns, and a total jitter including pulse-width
distortion of less than 1 ns. This circuit is recommended
for applications requiring low edge jitter or high-speed
data transmission at signal rates of up to 155 MBd.
Component values for this circuit can be calculated for
different LED drive currents using the equations shown
below. For additional details about LED drive circuits,
the reader is encouraged to read Avago Technologies
Application Bulletin 78 and Application Note 1038.
C
R
R
R
R
R
Y
Y
X1
EQ2
X2
2000
11.8
(5
3.16
R
1
2
11.8
X3



0.100
3.97
93.5
1.84)
ps
1 -
R
6.19
X4



169
10.8
3.97(5
11.8
3
0.100
93.5
pF
(10.8)
1.84
32.4
1.6)