HSDL-3612-008 Avago Technologies US Inc., HSDL-3612-008 Datasheet - Page 22

• Manufacturer Part Number: HSDL-3612-008
• Description: Infrared Transceivers 1m 3V SIR 400units t op options
• Manufacturer: Avago Technologies US Inc.

Specifications of HSDL-3612-008

• Wavelength: 875 nm, 880 nm
• Continual Data Transmission: 115.2 Kbit/s
• Transmission Distance: 1.5 m
• Radiant Intensity: 120 mW/sr
• Half Intensity Angle Degrees: 30 deg
• Pulse Width: 1.6 us, 4 us
• Maximum Rise Time: 40 ns, 25 ns
• Maximum Fall Time: 40 ns, 25 ns
• Led Supply Voltage: - 0.5 V to 7 V
• Maximum Forward Current: 165 mA
• Operating Voltage: 2.7 V to 5.25 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 20 C
• Dimensions: 12.2 mm x 5.1 mm x 4 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Appendix C: Optical Port
Dimensions for HSDL-3612:
22
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
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 from the HSDL-3612 to
0
º
.
and the maximum size
IR TRANSPARENT
Section of a castellation in Y-axis.
MATERIAL
OPAQUE
WINDOW
Y
Z
IR TRANSPARENT WINDOW
D
the back of the window. The
distance from the center of the
LED lens to the center of the
photodiode lens, K, is 7.08mm.
The equations for computing the
window dimensions are as
follows:
X = K + 2*(Z+D)*tanA
Y = 2*(Z+D)*tanA
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
comparable, Z' replaces Z in the
above equation. Z' is defined as
A
K
X
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-3612, D, is
8mm. ‘A’ is the required half
angle for viewing. For IrDA
compliance, the minimum is 15
and the maximum is 30
Assuming the thickness of the
window to be negligible, the
equations result in the following
tables and graphs:
OPAQUE
MATERIAL
0
.
0