HSDL-3021-021 Lite-On Electronics, HSDL-3021-021 Datasheet - Page 15
HSDL-3021-021
Manufacturer Part Number
HSDL-3021-021
Description
Infrared Transceivers IR Transceiver 4.0Mb/s
Manufacturer
Lite-On Electronics
Datasheet
1.HSDL-3021-021.pdf
(24 pages)
Specifications of HSDL-3021-021
Wavelength
885 nm
Continual Data Transmission
4 Mbit/s
Transmission Distance
50 cm
Radiant Intensity
10 mW/sr
Half Intensity Angle Degrees
30 deg to 60 deg
Pulse Width
4 us, 1.6 us
Maximum Rise Time
40 ns, 600 ns
Maximum Fall Time
40 ns, 600 ns
Led Supply Voltage
0 V to 6.5 V
Operating Voltage
2.4 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 25 C
Dimensions
8 mm x 3 mm x 2.5 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HSDL-3021-021
Manufacturer:
Agilent
Quantity:
1
Part Number:
HSDL-3021-021
Manufacturer:
AVAGO/安华高
Quantity:
20 000
Company:
Part Number:
HSDL-3021-021/HSDL3021
Manufacturer:
Agilent
Quantity:
10 000
15
Appendix B: PCB Layout Suggestion
The effects of EMI and power supply noise can poten-
tially reduce the sensitivity of the receiver, resulting in re-
duced link distance. The PCB layout played an important
role 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
4. V
5. IOV
6. Preferably a multi-layered board should be used
part, but should not extend under the shield trace.
to the system ground. CX1, CX2, CX3, CX4 and CX5 are
optional supply filter capacitors; they may be left out
if a clean power supply is used.
unregulated power supply. The bypass capacitors
should be connection before the current limiting
resistor R2 respectively. In a noisy environment,
including capacitor CX3and CX4 can enhance supply
rejection. CX3 that is generally a ceramic capacitor of
low inductance providing a wide frequency response
while CX4 is tantalum capacitor of big volume and fast
frequency response. The use of a tantalum capacitor
is more critical on the VLED line, which carries a high
current.
unregulated power supply. The Resistor, R1 together
with the capacitors, CX1 and CX2 acts as the low pass
filter.
VCC supply. The capacitor, CX5 acts as the bypass
capacitor.
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. The diagram below demonstrate an
example of a 4 layer board:
CC
pin can be connected to either unfiltered or
CC
is connected to the ASIC voltage supply or the
• Top Layer: Connect the metal shield and module
• Layer 2: Critical ground plane zone. 3 cm in all directions
• Layer 3: Keep data bus away from critical ground plane
• Bottom layer: Ground layer. Ground noise <75 mVp-
ground pin to bottom ground layer; Place the bypass
capacitors within 0.5 cm from the V
of the module.
around the module. Connect to a clean, noiseless
ground node (e.g., bottom layer).
zone.
p. Should be separated from ground used by noisy
sources.
CC
and ground pin