HSDL-3005-028 Avago Technologies US Inc., HSDL-3005-028 Datasheet - Page 16

• Manufacturer Part Number: HSDL-3005-028
• Description: Infrared Transceivers 20cm 3V SIR plus R C Top View
• Manufacturer: Avago Technologies US Inc.

Specifications of HSDL-3005-028

• Wavelength: 885 nm, 875 nm
• Continual Data Transmission: 115.2 Kbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 20 mW/sr
• Half Intensity Angle Degrees: 30 deg
• Pulse Width: 2.3 us, 1.6 us
• Maximum Rise Time: 100 ns, 600 ns
• Maximum Fall Time: 100 ns, 600 ns
• Led Supply Voltage: 2.4 V to 4.5 V
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7.5 mm x 3.35 mm x 2.8 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Appendix B:
PCB Layout Suggestion
The following PCB layout
guidelines should be followed to
obtain a good PSRR and EM
immunity resulting in good
electrical performance. Things to
note:
1. The ground plane should be
2. The shield trace is a wide, low
The area underneath the module
at the second layer, and 3 cm in
all directions around the
module, is defined as the critical
ground plane zone. The ground
plane should be maximized in
Top View
16
continuous under the part,
but should not extend under
the shield trace.
inductance trace back to the
system ground.
TOP LAYER
CONNECT THE METAL SHIELD AND MODULE
GROUND PIN TO BOTTOM GROUND LAYER.
LAYER 2
CRITICAL GROUND PLANE ZONE. DO NOT
CONNECT DIRECTLY TO THE MODULE
GROUND PIN.
LAYER 3
KEEP DATA BUS AWAY FROM CRITICAL
GROUND PLANE ZONE.
BOTTOM LAYER (GND)
Bottom View
3. VLED can be connected to
this zone. Refer to application
note AN1114 or the Avago IrDA
Data Link Design Guide for
details. The layout below is
based on a two-layer PCB.
either unfiltered or
unregulated power supply. If
VLED and Vcc share the same
power supply, CX3 need not
be used and the connections
for CX1 and CX2 should be
before the current limiting
resistor R1. In a noisy
environment, including
capacitor CX2 can enhance
supply rejection. CX1 is
generally a ceramic capacitor
of low inductance providing a
wide frequency response
while CX2 and CX3 are
tantalum capacitors of big
4. Preferably a multi-layered
volume and fast frequency
response. The use of a
tantalum capacitor is more
critical on the VLED line,
which carries a high current.
board should be used to
provide sufficient ground
plane. Use the layer
underneath and near the
transceiver module as Vcc,
and sandwich that layer
between ground connected
board layers. Refer to the
diagram below for an example
of a four-layer board.