HSDL-3021-021 Avago Technologies US Inc., HSDL-3021-021 Datasheet - Page 17

• Manufacturer Part Number: HSDL-3021-021
• Description: Infrared Transceivers FIR + RC
• Manufacturer: Avago Technologies US Inc.

Specifications of HSDL-3021-021

• Wavelength: 885 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 4 mW/sr
• Half Intensity Angle Degrees: 30 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

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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 infrared
transceiver is a low-cost and small
form factor device 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 transmission
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
Figure 2: Mobile application platform.
EXPANSION
MEMORY
SDRAM
FLASH
TOUCH PANEL
LOGIC BUS
ROM
DRIVER
A/D
MEMORY I/F
LCD CONTROL
MANAGEMENT
LCD PANEL
STN/TFT
POWER
also includes the following unique
features :
• Spectrally suited to universal
• Low passive component count
• Shutdown mode for low power
• Direct interface with I/O logic
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
“Recommended Application
circuit components.”
CC
remote control transmission
function at 940 nm typically
consumption requirement
circuit
APPLICATION
as shown on page 3 under
CHIPSET
MOBILE
PERIPHERIAL INTERFACE
CONTROLLER
BASEBAND
KEY PAD
ANTENNA
INTERFACE
SOUND
PWM
AC97
IrDA
I2S
LCD BACKLIGHT
*HSDL-3021
AUDIO INPUT
PCM SOUND
PANEL
The use of the infrared tech-
niques for data communication
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
interfacing to a direct connection
between the processor and the
transceiver. The next section
discusses interfacing
configuration with a general
processor.
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 required. 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.
Alternatively, 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
shown in Figure 3.