hsdl3208 Avago Technologies, hsdl3208 Datasheet - Page 13

• Manufacturer Part Number: hsdl3208
• Description: Ultra Small Profile Package Irda Data Compliant Low Power 115.2 Kbit/s Infrared Transceiver - Agilent Hewlett-packard
• Manufacturer: Avago Technologies

13
Appendix C : General Application
Guide for the HSDL-3208 Infrared
IrDA
Transceiver
Description
The HSDL-3208 is an ultra-small
low-cost infrared transceiver
module that provides the interface
between logic and infrared (IR)
signals for through air, serial,
half-duplex IR data link. The
device 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
fully compliant to IrDA 1.4 low
Figure 19: IR layout in mobile phone platform.
®
Compliant 115.2 kb/s
DE-MODULATOR
TRANSCEIVER
MOD/
MICROPHONE
SPEAKER
AUDIO INTERFACE
USER INTERFACE
RF INTERFACE
power specification from 9.6 kb/s
to 115.2 kb/s, and supports HP-
SIR and TV Remote modes. The
design of the HSDL-3208 also
includes the following unique
features:
• Low passive component count
• Shutdown mode for low power
Selection of Resistor R1
Resistor R1 should be selected to
provide the appropriate peak
pulse LED current over different
ranges of V
table below.
Recommended R1
2.7
consumption requirement
CC
as shown in the
MICROCONTROLLER
V
3.3 V
CC
DSP CORE
Intensity
9 mW/Sr
Interface to Recommended I/O Chips
The HSDL-3208’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 up to
115.2 kb/s is available at the RXD
pin.
The diagram below shows how
the IR port fits into the mobile
phone platform and PDA
platform.
CONTROLLER
IR
ASIC
HSDL-3208
Minimum Peak Pulse
LED Current
50 mA