ASDL-3212-021 Avago Technologies US Inc., ASDL-3212-021 Datasheet - Page 13

• Manufacturer Part Number: ASDL-3212-021
• Description: Infrared Transceivers SFF MIR Front w/o Shield
• Manufacturer: Avago Technologies US Inc.

Specifications of ASDL-3212-021

• Wavelength: 870 nm, 875 nm
• Continual Data Transmission: 1.152 Mbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 80 mW/sr
• Half Intensity Angle Degrees: 15 deg
• Pulse Width: 1.5 us, 1.6 us
• Maximum Rise Time: 60 ns, 600 ns
• Maximum Fall Time: 60 ns, 600 ns
• Led Supply Voltage: 0 V to 6 V
• Maximum Forward Current: 60 mA
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7 mm x 2.73 mm x 1.64 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Appendix C: General Application Guide for the ASDL-3212 Infrared IrDA® Compliant 1.15Mb/s Transceiver
Description
The ASDL-3212 is a low-cost and ultra small 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 power
speci cation from 9.6kb/s to 1.15Mb/s. The design of
ASDL-3212 also includes the following unique features:
x Low passive component count;
x Shutdown mode for low power consumption
x Direct interface with Super I/O logic circuit.
Figure C1. Mobile Application Platform
13
Memory Expansion
requirement;
SDRAM
FLASH
ROM
Logic Bus Driver
Touch Panel
STN/TFT LCD Panel
Memory I/F
A/D
LCD Control
Power Management
Mobile Application
chipset
Selection of Resistor R1
Resistor R1 should be selected to provide the appropri-
ate peak pulse LED current at di erent ranges of Vcc as
shown under “Recommended Application Circuit Com-
ponents”.
Interface to the Recommended I/O chip
The ASDL-3212’s TXD data input is bu ered to allow
for CMOS drive levels. No peaking circuit or capacitor
is required. Data rate from 9.6kb/s up to 1.15Mb/s is
available at RXD pin.
Figures C1 and C2 show how ASDL-3212 ts into a mobile
phone and PDA platform respectively.
Peripherial
interface PWM
controller
Baseband
Key Pad
Antenna
interface
IrDA
sound
AC97
I2S
LCD Backlight Contrast
PCM Sound
*ASDL -
3212
Audio Input