TFDU6301-TT3 Vishay, TFDU6301-TT3 Datasheet - Page 7

• Manufacturer Part Number: TFDU6301-TT3
• Description: Infrared Transceivers FIR 4Mbit/s 2.4-3.6V Op Voltage
• Manufacturer: Vishay
• Type: TX/RXr

Specifications of TFDU6301-TT3

• Wavelength: 886 nm
• Continual Data Transmission: 4 Mbit/s
• Radiant Intensity: 180 mW/sr
• Half Intensity Angle Degrees: 48 deg
• Pulse Width: 2.2 us
• Maximum Rise Time: 40 ns
• Maximum Fall Time: 40 ns
• Maximum Forward Current: 150 mA
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 8.5 mm x 3.1 mm x 2.5 mm
• Data Rate: 4Mbps
• Peak Wavelength: 886nm
• Angle Of Half Sensitivity: 48°
• Package Type: SMD
• Fall Time: 40ns
• Rise Time: 40ns
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (min): 2.4V
• Operating Supply Voltage (max): 3.6V
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temp Range: -25C to 85C
• Operating Temperature Classification: Commercial
• Idle Current, Typ @ 25° C: 1.8 mA
• Link Range, Low Power: 70cm
• Operating Temperature: -25°C ~ 85°C
• Orientation: Top View
• Shutdown: *
• Size: 8.5mm x 3.1mm x 2.5mm
• Standards: IrPHY 1.4
• Supply Voltage: 2.4 V ~ 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

I/O AND SOFTWARE
In the description, already different I/Os are mentioned.
Different combinations are tested and the function verified
with the special drivers available from the I/O suppliers. In
special cases refer to the I/O manual, the Vishay application
notes, or contact directly Vishay Sales, Marketing or
Application.
MODE SWITCHING
The TFDU6301 is in the SIR mode after power on as a
default mode, therefore the FIR data transfer rate has to be
set by a programming sequence using the TXD and SD
inputs as described below. The low frequency mode covers
speeds up to 115.2 kbit/s. Signals with higher data rates
should be detected in the high frequency mode. Lower
frequency data can also be received in the high frequency
mode but with reduced sensitivity. To switch the transceivers
from low frequency mode to the high frequency mode and
vice versa, the programming sequences described below are
required.
SETTING TO THE HIGH BANDWIDTH MODE
(0.576 Mbit/s to 4 Mbit/s)
1. Set SD input to logic “high”.
2. Set TXD input to logic “high”. Wait t
3. Set SD to logic “low” (this negative edge latches state of
4. After waiting t
TXD is now enabled as normal TXD input for the high
bandwidth mode.
Document Number: 84668
Rev. 2.0, 18-Aug-09
TABLE 1 - RECOMMENDED APPLICATION CIRCUIT COMPONENTS
TABLE 2 - TRUTH TABLE
COMPONENT
TXD, which determines speed setting).
hold time of TXD is limited by the maximum allowed pulse
length.
High
Low
SD
C1
C2
R1
R2
High > 150 µs
h
≥ 200 ns TXD can be set to logic “low”. The
High
TXD
Low
Low
Low
No resistor necessary, the internal controller is able to
x
Fast Infrared Transceiver Module (FIR, 4 Mbit/s)
[e-mail], [e-mail],
for 2.4 V to 3.6 V Operation and Low-Voltage
For technical questions within your region, please contact one of the following:
INPUTS
RECOMMENDED VALUE
OPTICAL INPUT IRRADIANCE mW/m
< max. detection threshold irradiance
> max. detection threshold irradiance
> min. detection threshold irradiance
control the current
s
0.1 µF, ceramic
10 Ω, 0.125 W
≥ 200 ns.
4.7 µF, 16 V
Logic (1.8 V)
< 4
x
x
x
SETTING TO THE LOWER BANDWIDTH MODE
(2.4 kbit/s to 115.2 kbit/s)
1. Set SD input to logic “high”.
2. Set TXD input to logic “low”. Wait t
3. Set SD to logic “low” (this negative edge latches state of
4. TXD must be held for t
TXD is now enabled as normal TXD input for the high
bandwidth mode.
Note
When applying this sequence to the device already in the lower
bandwidth mode, the SD pulse is interpreted as shutdown. In this
case the RXD output of the transceiver may react with a single pulse
(going active low) for a duration less than 2 µs. The operating
software should take care for this condition.
In case the applied SD pulse is longer than 4 µs, no RXD pulse is to
be expected but the receiver startup time is to be taken into account
before the device is in receive condition.
SD
TXD
2
TXD, which determines speed setting).
Weakly pulled (500 kΩ) to V
[e-mail]
Fig. 4 - Mode Switching Timing Diagram
50 %
Low (active)
Low (echo)
RXD
High
High
CRCW-1206-10R0-F-RT1
VISHAY PART NUMBER
x
VJ 1206 Y 104 J XXMT
Vishay Semiconductors
t
s
293D 475X9 016B
h
≥ 200 ns.
OUTPUTS
50 %
t
h
CC1
50 %
s
≥ 200 ns.
TFDU6301
High: FIR
TRANSMITTER
Low: SIR
www.vishay.com
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