hsdl-3203 Avago Technologies, hsdl-3203 Datasheet - Page 14

• Manufacturer Part Number: hsdl-3203
• Description: Small Profile Package Irda Data Compliant Low Power 115.2 Kbit/s Infrared Transceiver - Agilent Hewlett-packard
• Manufacturer: Avago Technologies

Appendix C: General Application
Guide for the HSDL-3203 Infrared IrDA
Compliant 115.2 kb/s Transceiver
Description
The HSDL-3203, 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 fully
compliant to IrDA 1.4 low 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-3203 also
includes the following unique
features:
• Low passive component count.
• Shutdown mode for low power
Figure 19. IR layout in mobile phone platform.
1 4
consumption requirement.
DE-MODULATOR
TRANSCEIVER
MOD/
MICROPHONE
SPEAKER
AUDIO INTERFACE
®
USER INTERFACE
RF INTERFACE
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
30
5.6
Interface to Recommended I/O Chips
The HSDL-3203’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 block diagram below shows
ow the IR port fits into a mobile
phone and PDA platform.
MOBILE PHONE PLATFORM
CC
as shown in the
V
3 V
3 V
CC
MICROCONTROLLER
Intensity
8 mW/sr
34 mW/sr
DSP CORE
Minimum peak
pulse LED current
50 mA
250 mA
CONTROLLER
IR
ASIC
HSDL-3203