TFDU6108-TT3 19 Vishay, TFDU6108-TT3 19 Datasheet - Page 14

• Manufacturer Part Number: TFDU6108-TT3 19
• Manufacturer: Vishay
• Type: TX/RXr

Specifications of TFDU6108-TT3 19

• Peak Wavelength: 900nm
• Angle Of Half Sensitivity: 48°
• Pulse Width: 2us
• Radiant Intensity: 0.0003W/sr
• Led Supply Voltage: -0.5 to 6V
• Package Type: Ultra Small Profile
• Fall Time: 40ns
• Rise Time: 40ns
• Dimensions: 9.7x4.7x4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 5.5V
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temp Range: -25C to 85C
• Operating Temperature Classification: Commercial
• Data Rate: 3.90625Mbps
• Lead Free Status / RoHS Status: Compliant

TFDU6108
Vishay Semiconductors
Appendix B
Application Guideline
In the following some guideline is given for handling
the TFDU6108 in an application ambient, especially
for testing. It is also a guideline for interfacing with a
controller. We recommend to use for first evaluation
the Vishay IRM1802 controller. For more information
see the special data sheet. Driver software is avail-
able on request. Contact [e-mail].
Serial Interface Capability of the Vishay
IrDA Transceivers Abstract
A serial interface allows an infrared controller to com-
municate with one or more infrared transceivers. The
basic specification of IrDA
described in "Serial Interface for Transceiver Control,
v 1.0a", IrDA.
This part of the document describes the capabilities of
the serial interface implemented in the Vishay IrDA
transceivers TFDU8108 and TFDU6108. The VFIR
(16 Mbit/s) and FIR (4 Mbit/s) programmable versions
are using the same interface specification (with spe-
cific identification and programming).
Power - up defaults
After power on the transceiver has to stay by definition in the following default mode shown in the table. The default mode of the TFDU6108
is different from the originally defined IrDA Serial Interface default mode. The implemented deviation from the standard was a market re-
quest because only in this way a requested quick function test is possible with the TFDU6108 without the need to connect to a programming
device.
Addressing
The transceiver is addressable with three address bits. There are individual and common addresses with the following values.
www.vishay.com
14
Common (broadcast) address
Individual address
Description
Transmitter Power
Infrared Mode
Power Mode
Function
TX_LED
APEN
RX
®
specified interface is
Mask programmable
IrDA Serial Interface Basics
The serial interface for transceiver control (SITC) is a
master/slave synchronous serial bus which uses the
Txd and Rxd as data lines and the SCLK as clock line
with a minimum period of 250 ns. The transceiver
works always as slave and jump into SITC mode on
the first rising edge of the clock line remaining there
until the command phase is finished. After power on it
is required an initial phase for ≥ 30 clock cycles at Txd
is continuous low before the transmitter can be pro-
grammed. If Txd assume high during the initial phase
then must start the initial phase again.
The data transfer is organized by one byte preceded
by one start bit. The SITC allows the communication
between infrared controller and transceiver through
write and read transaction. The SITC consists of two
store blocks with different functions. The store block
called Extended Indexed Registers contain the vari-
ous supported functionality of the device and can be
read only. The other Main Control Registers allow
write and read transaction and store the executable
configuration of the device.
Any configuration is executed after the command
phase is completed.
defined SIR level
TFDU6108
active (!)
enabled
active
active
SIR
Address value A [2:0]
Document Number 82537
001
111
Rev. 1.7, 13-May-05