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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
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 115.2 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
D Compliant to the latest IrDA physical layer standard (Up to 115.2 kbit/s) D 2.7 to 5.5 V Wide Operating Voltage Range D Low-Power Consumption (1.3 mA Supply Current) D Power Sleep Mode Through VCC1/SD Pin (5 nA Sleep Current) D Long Range (Up to 3.0 m at 115.2 k/bit/s) D Three Surface Mount Package Options - Universal (9.7 x 4.7 x 4.0 mm) - Side View (13.0 x 5.95 x 5.3 mm) - Top View (13.0 x 7.6 x 5.95 mm) D BabyFace (Universal) Package Capable of Surface Mount Solderability to Side and Top View Orientation D Directly Interfaces with Various Super I/O and Controller Devices and Telefunken's TOIM3000 and TOIM3232 I/Os D Built-In EMI Protection - No External Shielding Necessary D Few External Components Required D Backward Compatible to all Telefunken SIR Infrared Transceivers
Applications
D Notebook Computers, Desktop PCs, Palmtop Computers (Win CE, Palm PC), PDAs D Digital Still and Video Cameras D Printers, Fax Machines, Photocopiers, Screen Projectors D Telecommunication Products (Cellular Phones, Pagers) D Internet TV Boxes, Video Conferencing Systems D External Infrared Adapters (Dongles) D Medical and Industrial Data Collection Devices
Package Options
TFDU4100 Baby Face (Universal) TFDS4500 Side View TFDT4500 Top View
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken Ordering Information
Part Number TFDU4100-TR3 TFDU4100-TT3 TFDS4500-TR3 TFDT4500-TR3 Qty / Reel 1000 pcs 1000 pcs 750 pcs 750 pcs Description Oriented in carrier tape for side view surface mounting Oriented in carrier tape for top view surface mounting
Functional Block Diagram
VCC1/SD
Driver Amplifier Comparator Rxd
VCC2
R1 IRED Anode
SC Txd
AGC Logic
IRED Cathode Open Collector Driver
GND Figure 1. Functional Block Diagram
14876
Pin Description
Pin Number "U" and "T" Option "S" Option 1 8 Function IRED Anode Descri tion Description I/O Active
2 3 4
1 7 2
5 6 7 8
6 3 5 4
IRED anode, should be externally connected to VCC2 through a current control resistor IRED Cathode IRED cathode, internally connected to driver transistor Txd Transmit Data Input Rxd Received Data Output, open collector. No external pull-up or pull-down resistor is required (20 kW resistor internal to device). Pin is inactive during transmission. NC Do not connect VCC1 / SD Supply Voltage / Shutdown SC Sensitivity control GND Ground
I O
HIGH LOW
I
HIGH
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Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
"U" Option BabyFace (Universal)
IRED Detector
"S" Option Side View
"T" Option Top View
IRED Detector
14885
IRED
Detector
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 Su ly Supply Voltage Range Input Currents Output Sink Current Power Dissipation Junction Temperature Ambient Temperature Range (Operating) Storage Temperature Range Soldering Temperature Average IRED Current Repetitive Pulsed IRED Current IRED Anode Voltage Transmitter Data Input Voltage Receiver Data Output Voltage Virtual Source Size Maximum Intensity for Class 1 Operation of IEC825-1 or EN60825-1 (worst case IrDA SIR pulse pattern *) Test Conditions 0 V VCC2 6 V 0 V VCC1 6 V For all Pins, except IRED Anode Pin See Derating Curve Symbol VCC1 VCC2 Min. - 0.5 - 0.5 Typ. Max. 6 6 10 25 200 125 +85 +85 215 IIRED (DC) IIRED (RP) VIREDA VTxd VRxd Method: (1-1/e) encircled energy EN60825, 1997 d - 0.5 - 0.5 - 0.5 2.5 2.8 400 240 100 500 6 VCC1+0.5 VCC1+0.5 Unit V V mA mA mW C C C C mA mA V V V mm mW/sr
PD TJ Tamb Tstg
-25 -25
See Recommended Solder Profile t < 90 s, ton < 20%
* Note: Transmitted 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.
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken 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 Transceiver Supply Voltage Test Conditions / Pins Symbol VCC1 VCC2 Min. 2.7 2.0 Typ. Max. 5.5 5.5 Unit V V
Receive Mode Transmit Mode, R2 = 47 W (see Recommended Application Circuit) Supply Current Pin VCC1 VCC1 = 5.5 V (Receive Mode) VCC1 = 2.7 V Supply Current Pin VCC1 IIRED = 210 mA (avg) (Transmit Mode) (at IRED Anode Pin) VCC1 = 5.5 V VCC1 = 2.7 V Leakage Current of IR VCC1 = OFF, TXD = LOW, Emitter, IRED Anode Pin VCC2 = 6 V, T = 25 to 85C Transceiver Power On Settling Time
ICC1 (Rx)
1.3 1.0
2.5 1.5
mA mA
ICC1 (Tx) IL (IREDA) TPON
5.0 3.5 0.005 50
5.5 4.5 0.5
mA mA A s
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 Receiver Minimum Detection BER = 10-8 (IrDA Specification) Threshold Irradiance a = 15, SIR Mode, SC = LOW a = 15, SIR Mode, SC = HIGH Maximum Detection a = 90, SIR Mode, VCC1 = 5 V Threshold Irradiance a = 90, SIR Mode, VCC1 = 3 V Logic LOW Receiver SC = HIGH or LOW Input Irradiance Out ut Output Voltage - Active, C = 15 pF, R = 2.2 kW Rxd Non-active, C = 15 pF, R = 2.2 kW Output Current - VOL < 0.8 V Rxd Rise Time - Rxd C = 15 pF, R = 2.2 kW Fall Time - Rxd C = 15 pF, R = 2.2 kW Pulse Width - Rxd Input pulse width = 1.6 s, Output 115.2 kbit/s Jitter, Leading Edge Over a Period of 10 bit, 115.2 kbit/s of Output Signal Latency Symbol Min. Typ. Max. Unit
Ee Ee Ee Ee Ee VOL VOH IOL tr (Rxd) tf (Rxd) tPW ti tL
6 3.3 8
20 10 5 15
35 15
4 0.5 VCC1-0.5 4 20 20 1.41 1400 200 8 2 100 500 0.8
mW/m 2 mW/m 2 kW/m 2 kW/m 2 mW/m 2 V V mA ns ns s s s
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Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken 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 Transmitter IRED Operating Current Test Conditions IRED Operating Current can be adjusted by Variation of R1. Current Limiting Resistor is in Series to IRED: R1 = 14 , VCC2 = 5.0 V Symbol IIRED Min. Typ. 0.2 Max. 0.28 Unit A
Logic LOW Transmitter Input Voltage Logic HIGH Transmitter Input Voltage Output Radiant Intensity
VIL (Txd) VIH (Txd) In Agreement with IEC825 Eye Safety Limit, if Current Limiting Resistor is in Series to IRED: R1 = 14 , VCC2 = 5.0 V, = 15_ Txd Logic LOW Level Ie
0 2.4 45 140
0.8 VCC1+0.5 200
V V mW/sr
Angle of Half Intensity Peak Wavelength of Emission Half-Width of Emission Spectrum Optical Rise Time, Fall Time Optical Overshoot Rising Edge Peak- Over a Period of 10 bits, to-Peak Jitter of Independent of Optical Output Pulse Information content
Ie a lP 880
0.04 24 900 60
mW/sr _ nm nm
tropt, tfopt
200
600 25 0.2
ns % ms
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken 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.
VCC2 R1 VCC1 R2 Rxd IRED Cathode Rxd IRED Anode Txd
480 440 400 360 320 Intensity (mW/sr) 280 240 200 160 120 80 40 0 6 8 10 12 14 16
14377
Vcc = 5.25 V, max. efficiency, center, min. VF, min. VCEsat
Vcc = 4.75 V, min. efficiency, 15 off axis, max. VF, max. VCEsat
TFDx4x00
C1 GND C2 VCC1/SD GND SC NC
Current Control Resistor ( W )
Figure 4. Ie vs. R1
760 720 680 640 600 560 520 480 440 400 360 320 280 240 200 160 120 80 40 0 0
14378
SC Txd Note: outlined components are optional depending on the quality of the power supply
Vcc=3.3V, max. intensity on axis, min. VF, min. VCEsat
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 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.
Table 1. Recommended Application Circuit Components
Intensity (mW/sr)
Vcc=2.7V, min. intensity "15 off axis, max. VF, max. VCEsat
1
2
3
4
5
6
7
8
Serial Resistor ( W )
Figure 5. Ie vs. R1
Component Recommended Value C1 4.7 mF, Tantalum C2 0.1 F, Ceramic R1 14 , 0.25 W (recommended using two 7 , 0.125 W resistors in series) R2 47 , 0.125 W
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Vishay Part Number 293D 475X9 016B 2T VJ 1206 Y 104 J XXMT CRCW-1206-7R00-F-RT1 CRCW-1206-47R0-F-RT1
Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
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. 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.
IIRED Power Supply + - Regulated Power Supply 50 mA
R1 IRED Anode
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
Microcontroller or Microprocessor 20 mA
IS VCC1/SD
TFDU4100 (Note: Typical 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 (Avg.)
14878
Figure 6.
IIRED Power Supply + -
Regulated Power Supply 50 mA
R1
IRED Anode Microcontroller or Microprocessor 20 mA IS VCC1/SD
TFDU4100 (Note: Typical 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 (Avg.)
14879
Figure 7.
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken Recommended SMD Pad Layout
The leads of the device should be soldered in the center position of the pads.
7x1=7 0.6
+0 -0.5
2.5
+0 -0.5
1
15067
8 1
Figure 8. TFDU4100 BabyFace (Universal)
11.8 5.08 2.54 8 7 2.54 6 0.63 1.1 1.0 2.2 1 2.54
15069
5 1.8
0.63
1
8.3
2 2.54
3
4
5.08 Figure 9. TFDS4500 Side View Package
8.89 1.27 0.8
1.8 1
15068
8
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.
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Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken
Recommended Solder Profile
240 210 Temperature ( C )
2 - 4C/s
10 s max. @ 230C
Current Derating Diagram
600 Peak Operating Current ( mA ) 500 400 300 200 100 0 -40 -20 0
14880 Current derating as a function of the maximum forward current of IRED. Maximum duty cycle: 25%.
180 150 120 90 60 30 0 0 50 100
120 - 180 s 90 s max.
2 - 4C/s
14874
150 200 250 Time ( s )
300
350
20 40 60 80 100 120 140 Temperature ( 5C )
Figure 11. Recommended Solder Profile
Figure 12. Current Derating Diagram
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken TFDU4100 - BabyFace (Universal) Package (Mechanical Dimensions)
12249
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Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken TFDS4500 - Side View Package (Mechanical Dimensions)
14322
Document Number 82514 Rev. A1.2, 23-Feb-01
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TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken TFDT4500 - Top View Package (Mechanical Dimensions)
14325
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Document Number 82514 Rev. A1.2, 23-Feb-01
TFDU4100/TFDS4500/TFDT4500
Vishay Telefunken 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. Various 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.
We 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. Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 )7131 67 2831, Fax number: 49 ( 0 )7131 67 2423
Document Number 82514 Rev. A1.2, 23-Feb-01
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