HSDL-3220-021 Lite-On Electronics, HSDL-3220-021 Datasheet - Page 13

• Manufacturer Part Number: HSDL-3220-021
• Description: Infrared Transceivers IR Transceiver
• Manufacturer: Lite-On Electronics

Specifications of HSDL-3220-021

• Wavelength: 875 nm, 880 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 45 mW/sr
• Half Intensity Angle Degrees: 30 deg to 60 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 60 ns, 600 ns
• Maximum Fall Time: 60 ns, 600 ns
• Led Supply Voltage: 0 V to 6.5 V
• Maximum Forward Current: 50 mA
• Operating Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 8 mm x 3 mm x 2.5 mm
• Data Rate: 4Mbs (FIR)
• Idle Current, Typ @ 25° C: 1.8 mA
• Link Range, Low Power: 1m
• Operating Temperature: -25°C ~ 70°C
• Orientation: Side View
• Shutdown: *
• Size: 8mm x 3mm x 2.5mm
• Standards: IrPHY 1.4
• Supply Voltage: 2.7 V ~ 3.6 V
• Lead Free Status / RoHS Status: Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, 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 continuous under the
2. The shield trace is a wide, low inductance trace back
3. Vled can be connected to either unfiltered or un-
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 this zone. Refer to application
note AN1114 or the Lite-On Technologies' IrDA Data Link
Design Guide for details. The layout below is based on a
2-layer PCB.
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part, but should not extend under the shield trace.
to the system ground. CX1, CX2, CX3, and CX4 are
optional supply filter capacitors; they may be left out
if a clean power supply is used.
regulated 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 rejec-
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)
4. Preferably a multi-layered board should be used to
Figure 16. PCB layout suggestion.
tion. CX1 is generally a ceramic capacitor of low in-
ductance providing a wide frequency response while
CX2 and CX3 are tantalum capacitors of big volume
and fast frequency response. The use of a tantalum
capacitor is more critical on the Vled line, which car-
ries a high current. CX4 is an optional ceramic capaci-
tor, similar to CX1, for the IOVcc line.
provide sufficient ground plane. Use the layer un-
derneath 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 4
layer board.