TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 1 (13)
www.vishay.com
Document Number 82514
2.7 V to 5.5 V Serial Infrared Transceiver
Module Family (SIR, 115.2 kbit/s)
Description
The TFDU4100, TFDS4500, and TFDT4500 are a
family of low–power infrared transceiver modules
compliant to the IrDA standard for serial infrared (SIR)
data communication, supporting IrDA speeds up to
1 15.2 kbit/s. Integrated within the transceiver modules
are a photo PIN diode, infrared emitter (IRED), and a
low–power analog control IC to provide a total
front–end solution in a single package. Telefunken’s
SIR transceivers are available in three package
options, including our BabyFace package
(TFDU4100), the once smallest SIR transceiver
available on the market. This wide selection provides
flexibility for a variety of applications and space
constraints. The transceivers are capable of directly
interfacing with a wide variety of I/O chips which
perform the pulse–width modulation/demodulation
function, including Telefunken’s TOIM4232 and
TOIM3232. At a minimum, a current– limiting resistor
in series with the infrared emitter and a VCC bypass
capacitor are the only external components required to
implement a complete solution.
Features
Compliant to the latest IrDA physical layer standard
(Up to 115.2 kbit/s)
2.7 to 5.5 V Wide Operating Voltage Range
Low–Power Consumption (1.3 mA Supply Current)
Power Sleep Mode Through VCC1/SD Pin
(5 nA Sleep Current)
Long Range (Up to 3.0 m at 115.2 k/bit/s)
Three Surface Mount Package Options
– Universal (9.7 × 4.7 × 4.0 mm)
– Side View (13.0 × 5.95 ×5.3 mm)
– Top View (13.0 × 7.6 × 5.95 mm)
BabyFace (Universal) Package Capable of
Surface Mount Solderability to Side and Top View
Orientation
Directly Interfaces with Various Super I/O and
Controller Devices and Telefunken’s TOIM3000
and TOIM3232 I/Os
Built–In EMI Protection – No External Shielding
Necessary
Few External Components Required
Backward Compatible to all Telefunken
SIR Infrared Transceivers
Applications
Notebook Computers, Desktop PCs, Palmtop
Computers (Win CE, Palm PC), PDAs
Digital Still and Video Cameras
Printers, Fax Machines, Photocopiers, Screen
Projectors
Telecommunication Products
(Cellular Phones, Pagers)
Internet TV Boxes, Video Conferencing Systems
External Infrared Adapters (Dongles)
Medical and Industrial Data Collection Devices
Package Options
TFDU4100 TFDS4500 TFDT4500
Baby Face (Universal) Side View Top View
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
2 (13)
Ordering Information
Part Number Qty / Reel Description
TFDU4100–TR3 1000 pcs Oriented in carrier tape for side view surface mounting
TFDU4100–TT3 1000 pcs Oriented in carrier tape for top view surface mounting
TFDS4500–TR3 750 pcs
TFDT4500–TR3 750 pcs
Functional Block Diagram
Comparator
Amplifier
AGC
Logic
Driver
Open Collector Driver
VCC1/SD
SC
Txd
GND
Rxd
14876
IRED Anode
IRED Cathode
VCC2
R1
Figure 1. Functional Block Diagram
Pin Description
Pin Number Function Description I/O Active
“U” and “T” Option “S” Option
Function
Descri tion
I/O
Active
1 8 IRED Anode IRED anode, should be externally con-
nected to VCC2 through a current control
resistor
2 1 IRED Cathode IRED cathode, internally connected to
driver transistor
3 7 Txd Transmit Data Input I HIGH
4 2 Rxd Received Data Output, open collector.
No external pull–up or pull–down resistor
is required (20 k resistor internal to de-
vice). Pin is inactive during transmission.
O LOW
5 6 NC Do not connect
6 3 VCC1 / SD Supply Voltage / Shutdown
7 5 SC Sensitivity control I HIGH
8 4 GND Ground
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 3 (13)
www.vishay.com
Document Number 82514
“U” Option BabyFace (Universal) “S” Option Side View “T” Option Top View
IRED Detector
IRED Detector
IRED Detector
14885
Figure 2. Pinnings
Absolute Maximum Ratings
Reference point Pin GND unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Supply Voltage Range 0 V ≤VCC2 ≤6 V VCC1 – 0.5 6 V
Su ly
Voltage
Range
0 V ≤VCC1 ≤6 V VCC2 – 0.5 6 V
Input Currents For all Pins,
except IRED Anode Pin 10 mA
Output Sink Current 25 mA
Power Dissipation See Derating Curve PD200 mW
Junction Temperature TJ125 °C
Ambient Temperature
Range (Operating) Tamb –25 +85 °C
Storage Temperature
Range Tstg –25 +85 °C
Soldering Temperature See Recommended Sol-
der Profile 215 240 °C
Average IRED Current IIRED (DC) 100 mA
Repetitive Pulsed IRED
Current t < 90 µs, ton < 20% IIRED (RP) 500 mA
IRED Anode Voltage VIREDA – 0.5 6 V
Transmitter Data Input
Voltage VTxd – 0.5 VCC1+0.5 V
Receiver Data Output
Voltage VRxd – 0.5 VCC1+0.5 V
Virtual Source Size Method:
(1–1/e) encircled energy d 2.5 2.8 mm
Maximum Intensity for
Class 1 Operation of
IEC825–1 or EN60825–1
(worst case IrDA SIR
pulse pattern *)
EN60825, 1997 400 mW/sr
* Note:
T ransmitted data: continuously transmitted “0”. In normal data transfer operation “0” and “1” will be transmitted with
the same probability. Therefore, for that case, about a factor of two of safety margin is included. However , for worst
case thermal stress testing such data pattern are often used and for this case the 400 mW/sr value has to be taken.
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
4 (13)
Electrical Characteristics
Tamb = 25_C, VCC = 2.7 V to 5.5 V unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
Transceiver
Supply Voltage Receive Mode
Transmit Mode, R2 = 47 W
(see Recommended Applica-
tion Circuit)
VCC1
VCC2 2.7
2.0 5.5
5.5 V
V
Supply Current Pin VCC1
(Receive Mode) VCC1 = 5.5 V
VCC1 = 2.7 V ICC1 (Rx) 1.3
1.0 2.5
1.5 mA
mA
Supply Current Pin VCC1
(avg) (Transmit Mode) IIRED = 210 mA
(at IRED Anode Pin)
VCC1 = 5.5 V
VCC1 = 2.7 V ICC1 (Tx) 5.0
3.5 5.5
4.5 mA
mA
Leakage Current of IR
Emitter, IRED Anode Pin VCC1 = OFF, TXD = LOW,
VCC2 = 6 V, T = 25 to 85°CIL (IREDA) 0.005 0.5 µA
Transceiver Power On
Settling Time TPON 50 µs
Optoelectronic Characteristics
Tamb = 25_C, VCC = 2.7 V to 5.5 V unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Receiver
Minimum Detection BER = 10–8 (IrDA Specification)
Minimum
Detection
Threshold Irradiance a = ±15°, SIR Mode, SC = LOW Ee20 35 mW/m2
a = ±15°, SIR Mode, SC = HIGH Ee6 10 15 mW/m2
Maximum Detection a = ±90°, SIR Mode, VCC1 = 5 V Ee3.3 5 kW/m2
Maximum
Detection
Threshold Irradiance a = ±90°, SIR Mode, VCC1 = 3 V Ee8 15 kW/m2
Logic LOW Receiver
Input Irradiance SC = HIGH or LOW Ee4 mW/m2
Output Voltage – Active, C = 15 pF, R = 2.2 kWVOL 0.5 0.8 V
Out ut
Voltage
Rxd Non–active, C = 15 pF, R = 2.2 kWVOH VCC1–0.5 V
Output Current –
Rxd VOL < 0.8 V IOL 4 mA
Rise Time – Rxd C = 15 pF, R = 2.2 kWtr (Rxd) 20 1400 ns
Fall Time – Rxd C = 15 pF, R = 2.2 kWtf (Rxd) 20 200 ns
Pulse Width – Rxd
Output Input pulse width = 1.6 µs,
115.2 kbit/s tPW 1.41 8 µs
Jitter, Leading Edge
of Output Signal Over a Period of 10 bit, 115.2 kbit/s ti2µs
Latency tL100 500 µs
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 5 (13)
www.vishay.com
Document Number 82514
Optoelectronic Characteristics
Tamb = 25_C, VCC = 2.7 V to 5.5 V unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Transmitter
IRED Operating
Current IRED Operating Current can be
adjusted by Variation of R1.
Current Limiting Resistor is in
Series to IRED:
R1 = 14 Ω, VCC2 = 5.0 V
IIRED 0.2 0.28 A
Logic LOW Trans-
mitter Input Voltage VIL (Txd) 0 0.8 V
Logic HIGH Trans-
mitter Input Voltage VIH (Txd) 2.4 VCC1+0.5 V
Output Radiant In-
tensity In Agreement with IEC825 Eye
Safety Limit, if
Current Limiting Resistor is in
Series to IRED:
R1 = 14 Ω, VCC2 = 5.0 V,
α = ±15_
Ie45 140 200 mW/sr
Txd Logic LOW Level Ie0.04 mW/sr
Angle of Half
Intensity a±24 _
Peak Wavelength of
Emission lP880 900 nm
Half–Width of
Emission Spectrum 60 nm
Optical Rise Time,
Fall T ime tropt,
tfopt 200 600 ns
Optical Overshoot 25 %
Rising Edge Peak–
to-Peak Jitter of
Optical Output Pulse
Over a Period of 10 bits,
Independent of
Information content
0.2 ms
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
6 (13)
Recommended Circuit Diagram
The only required components for designing an
IrDA 1.2 compatible design using Telefunken SIR
transceivers are a current limiting resistor to the IRED.
However, depending on the entire system design and
board layout, additional components may be required
(see figure 3). It is recommended that the capacitors
C1 and C2 are positioned as near as possible to the
transceiver power supply pins. A tantalum capacitor
should be used for C1, while a ceramic capacitor
should be used for C2 to suppress RF noise. Also,
when connecting the described circuit to the power
supply, low impedance wiring should be used.
IRED
Cathode IRED
Anode
Rxd
VCC1/SD
GND
Txd
SC
NC
TFDx4x00
C2C1
R2
R1
VCC2
Rxd
GND
VCC1
SC
Txd Note: outlined components are optional depending
on the quality of the power supply
Figure 3. Recommended Application Circuit
R1 is used for controlling the current through the IR
emitter. For increasing the output power of the IRED,
the value of the resistor should be reduced. Similarly,
to reduce the output power of the IRED, the value of
the resistor should be increased. For typical values of
R1 (see figures 4 and 5), e.g. for IrDA compliant
operation (VCC2 = 5 V ± 5%), a current control resistor
of 14 Ω is recommended. The upper drive current
limitation is dependent on the duty cycle and is given
by the absolute maximum ratings on the data sheet
and the eye safety limitations given by IEC825–1.
R2, C1 and C2 are optional and dependent on the
quality of the supply voltage VCC1 and injected noise.
An unstable power supply with dropping voltage during
transmission may reduce sensitivity (and transmission
range) of the transceiver.
0
40
80
120
160
200
240
280
320
360
400
440
480
6 8 10 12 14 16
Current Control Resistor ( W )
14377
Intensity (mW/sr)
Vcc = 5.25 V,
max. efficiency, center,
min. VF, min. VCEsat
Vcc = 4.75 V, min. efficiency,
15° of f axis, max. VF, max. VCEsat
Figure 4. Ie vs. R1
0
40
80
120
160
200
240
280
320
360
400
440
480
520
560
600
640
680
720
760
012345678
Serial Resistor ( W )
14378
Intensity (mW/sr)
Vcc=2.7V, min. intensity
15°off axis, max. VF, max. VCEsat
Vcc=3.3V, max. intensity on
axis, min. VF, min. VCEsat
Figure 5. Ie vs. R1
Table 1. Recommended Application Circuit Components
Component Recommended Value Vishay Part Number
C1 4.7 mF, Tantalum 293D 475X9 016B 2T
C2 0.1 µF, Ceramic VJ 1206 Y 104 J XXMT
R1 14 Ω, 0.25 W (recommended using
two 7 Ω, 0.125 W resistors in series) CRCW–1206–7R00–F–RT1
R2 47 Ω , 0.125 W CRCW–1206–47R0–F–RT1
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 7 (13)
www.vishay.com
Document Number 82514
The sensitivity control (SC) pin allows the minimum
detection irradiance threshold of the transceiver to be
lowered when set to a logic HIGH. Lowering the
irradiance threshold increases the sensitivity to
infrared signals and increases transmission range up
to 3 meters. However, setting the Pin SC to logic HIGH
also makes the transceiver more susceptable to
transmission errors due to an increased sensitivity to
fluorescent light disturbances. It is recommended to
set the Pin SC to logic LOW or left open if the increased
range is not required or if the system will be operating
in bright ambient light.
The guide pins on the side-view and top-view
packages are internally connected to ground but
should not be connected to the system ground to avoid
ground loops. They should be used for mechanical
purposes only and should be left floating.
Shutdown
The internal switch for the IRED in Telefunken SIR
transceivers is designed to be operated like an open
collector driver. Thus, the Vcc2 source can be an
unregulated power supply while only a well regulated
power source with a supply current of 1.3 mA
connected to VCC1/SD is needed to provide power to
the remainder of the transceiver circuitry in receive
mode. In transmit mode, this current is slightly higher
(approximately 4 mA average at 3 V supply current)
and the voltage is not required to be kept as stable as
in receive mode. A voltage drop of VCC1 is acceptable
down to about 2.0 V when buffering the voltage directly
from the Pin VCC1 to GND see figure 3).
This configuration minimizes the influence of high
current surges from the IRED on the internal analog
control circuitry of the transceiver and the application
circuit. Also board space and cost savings can be
achieved by eliminating the additional linear regulator
normally needed for the IRED’s high current
requirements.
The transceiver can be very efficiently shutdown by
keeping the IRED connected to the power supply VCC2
but switching off VCC1/SD. The power source to
VCC1/SD can be provided directly from a
microcontroller (see figure 6). In shutdown, current
loss is realized only as leakage current through the
current limiting resistor to the IRED (typically 5 nA).
The settling time after switching VCC1/SD on again is
approximately 50 ms. Telefunken’s TOIM3232
interface circuit is designed for this shutdown feature.
The VCC_SD, S0 or S1 outputs on the TOIM3232 can
be used to power the transceiver with the necessary
supply current.
If the microcontroller or the microprocessor is unable
to drive the supply current required by the transceiver ,
a low–cost SOT23 pnp transistor can be used to switch
voltage on and off from the regulated power supply
(see figure 7). The additional component cost is
minimal and saves the system designer additional
power supply costs.
Power
Supply
TFDU4100 (Note: T ypical Values Listed)
Receive Mode
@ 5 V: IIRED = 210 mA, IS = 1.3 mA
@ 2.7 V: IIRED = 210 mA, IS = 1.0 mA
Transmit Mode
@ 5 V: IIRED = 210 mA, IS = 5 mA (Avg.)
@ 2.7 V: IIRED = 210 mA, IS = 3.5 mA (A vg.)
Regulated Power Supply
50 mA IRED
Anode
VCC1/SD
14878
Microcontroller or
Microprocessor
20 mA
IIRED
R1
IS
+
–
Figure 6.
Power
Supply
TFDU4100 (Note: T ypical Values Listed)
Receive Mode
@ 5 V: IIRED = 210 mA, IS = 1.3 mA
@ 2.7 V: IIRED = 210 mA, IS = 1.0 mA
Transmit Mode
@ 5 V: IIRED = 210 mA, IS = 5 mA (Avg.)
@ 2.7 V: IIRED = 210 mA, IS = 3.5 mA (A vg.)
Regulated Power Supply
50 mA
IRED
Anode
VCC1/SD
14879
Microcontroller or
Microprocessor
20 mA
IIRED
R1
IS
+
–
Figure 7.
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
8 (13)
Recommended SMD Pad Layout
The leads of the device should be soldered in the center position of the pads.
7 x 1 = 7
0.6
81
1
15067
+0
–0.5
2.5 +0
–0.5
Figure 8. TFDU4100 BabyFace (Universal)
11.8
5.082.54 2.54
5876
1.8
0.63
1.1
1.0 0.63 1 8.3
2.2
4123
2.54 2.54
5.08
15069
Figure 9. TFDS4500 Side V iew Package
1.27 0.8
18
8.89
1.8
15068
Figure 10. TFDT4500 Top View Package
Note: Leads of the device should be at least 0.3 mm within the ends of the pads.
Pad 1 is longer to designate Pin 1 connection to transceiver.
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 9 (13)
www.vishay.com
Document Number 82514
Recommended Solder Profile
Time ( s )
Temperature ( C )
14874
°
0
30
60
90
120
150
180
210
240
0 50 100 150 200 250 300 350
2 - 4°C/s
10 s max.
@ 230°C
90 s max.120 - 180 s
2 - 4°C/s
Figure 11. Recommended Solder Profile
Current Derating Diagram
0
100
200
300
400
500
600
–40 –20 0 20 40 60 80 100 120 140
Peak Operating Current ( mA )
Temperature ( 5C )14880
Current derating as a function of
the maximum forward current of
IRED. Maximum duty cycle: 25%.
Figure 12. Current Derating Diagram
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
10 (13)
TFDU4100 – BabyFace (Universal) Package (Mechanical Dimensions)
12249
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 1 1 (13)
www.vishay.com
Document Number 82514
TFDS4500 – Side View Package (Mechanical Dimensions)
14322
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01
www.vishay.com Document Number 82514
12 (13)
TFDT4500 – Top View Package (Mechanical Dimensions)
14325
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Rev . A1.2, 23-Feb-01 13 (13)
www.vishay.com
Document Number 82514
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating
systems with respect to their impact on the health and safety of our employees and the public, as well as
their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. V arious national and international initiatives are pressing for an earlier ban
on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of
ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
W e reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer application
by the customer. Should the buyer use Vishay Telefunken products for any unintended or unauthorized application, the
buyer shall indemnify Vishay Telefunken against all claims, costs, damages, and expenses, arising out of, directly or
indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use.
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Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
