HSDL-3208-021 Lite-On Electronics, HSDL-3208-021 Datasheet - Page 20

• Manufacturer Part Number: HSDL-3208-021
• Description: Infrared Transceivers IR Transceiver 115Kb/s
• Manufacturer: Lite-On Electronics
• Type: TX/RXr

Specifications of HSDL-3208-021

• Wavelength: 875 nm, 880 nm
• Continual Data Transmission: 115.2 Kbit/s
• Radiant Intensity: 8 mW/sr
• Half Intensity Angle Degrees: 30 deg to 60 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 50 ns, 600 ns
• Maximum Fall Time: 50 ns, 600 ns
• Led Supply Voltage: 0 V to 6.5 V
• Maximum Forward Current: 50 mA
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7.4 mm x 2.9 mm x 1.8 mm
• Data Rate: 115.2Kbps
• Peak Wavelength: 875/880nm
• Angle Of Half Sensitivity: 60/30°
• Fall Time: 600/50ns
• Rise Time: 600/50ns
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (min): 2.4V
• Operating Supply Voltage (max): 3.6V
• Mounting: Surface Mount
• Pin Count: 7
• Operating Temp Range: -25C to 70C
• Operating Temperature Classification: Commercial
• Idle Current, Typ @ 25° C: 100µA
• Link Range, Low Power: 30cm
• Operating Temperature: -25°C ~ 70°C
• Orientation: Side View
• Shutdown: *
• Size: 7mm x 2.8mm x 1.6mm
• Standards: IrPHY 1.4
• Supply Voltage: 2.4 V ~ 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20
Appendix D: Window Designs for HSDL-3208
Optical port dimensions for
HSDL-3208:
To ensure IrDA compliance, some
constraints on the height and width
of the window exist. The minimum
dimensions ensure that the IrDA
cone angles are met without
vignetting. The maximum
dimensions minimize the effects of
stray light. The minimum size
corresponds to a cone angle of 30
and the maximum size corresponds
to a cone angle of 60 .
In the figure below, X is the width
of the window, Y is the height of
the window and Z is the distance
Figure 29. Window design diagram.
IR TRANSPARENT
MATERIAL
OPAQUE
WINDOW
Y
Z
IR TRANSPARENT WINDOW
D
A
from the HSDL-3208 to the back of
the window. The distance from the
center of the LED lens to the
center of the photodiode lens, K, is
5.1 mm. The equations for
computing the window dimensions
are as follows:
X = K + 2
Y = 2
The above equations assume that
the thickness of the window is
negligible compared to the
distance of the module from the
back of the window (Z). If they are
X
K
*
(Z + D)
*
(Z + D)
*
tanA
*
tanA
OPAQUE
MATERIAL
comparable, Z' replaces Z in the
above equation. Z' is defined as
Z' = Z + t/n
where ‘t’ is the thickness of the
window and ‘n’ is the refractive
index of the window material.
The depth of the LED image inside
the HSDL-3208, D, is 3.17 mm.
‘A’ is the required half angle for
viewing. For IrDA compliance, the
minimum is 150 and the maximum
is 300. Assuming the thickness of
the window to be negligible, the
equations result in the following
tables and graphs: