HSDL-3021-021 Lite-On Electronics, HSDL-3021-021 Datasheet - Page 17

• Manufacturer Part Number: HSDL-3021-021
• Description: Infrared Transceivers IR Transceiver 4.0Mb/s
• Manufacturer: Lite-On Electronics

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

Appendix C: General Application Guide for the HSDL-3021
infrared IrDA Compliant 4 Mb/s Transceiver
Description
The HSDL-3021, a wide-voltage operating range infra-
red transceiver is a low-cost and small form factor de-
vice that is designed to address the mobile computing
market such as PDAs, as well as small embedded mobile
products such as digital cameras and cellular phones. It
is spectrally suited to universal remote control transmis-
sion function at 940 nm typically. It is fully compliant to
IrDA 1.4 low power specification up 4Mb/s and support
most remote control codes. The design of HSDL-3021
also includes the following unique features :
• Spectrally suited to universal remote control
• Low passive component count
• Shutdown mode for low power consumption
• Direct interface with I/O logic circuit
Figure 2: Mobile application platform.
Selection of Resistor R2
Resistor R2 should be selected to provide the appropriate
peak pulse IR and RC LED current respectively at different
ranges of V
Application circuit components. ”
17
EXPANSION
transmission function at 940 nm typically
requirement
MEMORY
SDRAM
CC
as shown on page 3 under “Recommended
FLASH
TOUCH PANEL
LOGIC BUS
ROM
DRIVER
A/D
MEMORY I/F
LCD CONTROL
MANAGEMENT
LCD PANEL
STN/TFT
POWER
APPLICATION
CHIPSET
MOBILE
PERIPHERIAL INTERFACE
CONTROLLER
BASEBAND
KEY PAD
ANTENNA
INTERFACE
SOUND
PWM
AC97
IrDA
Interface to the Recommended I/O Chip
The HSDL-3021’s TXD data input is buffered to allow for
CMOS drive levels. No peaking circuit or capacitor is re-
quired. Data rate from 9.6 kb/s to 4 Mb/s is available at
RXD pin. The TXD_RC, pin 7, together with LEDA, pin1, is
used to select the remote control transmit mode. Alter-
natively, the TXD_IR, pin 3, together with LEDA, pin 1, is
used for infrared transmit selection.
Following shows the hardware reference design with
HSDL-3021.
* Detailed configuration of HSDL-3021 with the controller chip is
The use of the infrared tech-niques for data communi-
cation has increased rapidly lately and almost all mobile
application processors have built in the IR port. This does
away with the external Endec and simplifies the interfac-
ing to a direct connection between the processor and
the transceiver. The next section discusses interfacing
configuration with a general processor.
I2S
shown in Figure 3.
LCD BACKLIGHT
*HSDL-3021
AUDIO INPUT
PCM SOUND
PANEL