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TFDU4201
Vishay Telefunken
Integrated Low Profile Transceiver Module for Telecom Applications - IrDA Standard
Description
The miniaturized TFDU4201 is an ideal transceiver for applications in telecommunications like mobile phones and pagers. The device is mechanically designed for lowest profile with a height of only 2.8 mm. The infrared transceiver is compatible to the IrDA Telecom standard of IrDA physical layer specification version 1.2 up to a data rate of 115 kbit/s.
Package
Features
D Package Dimension:
L 7.3 mm x W 4.55 mm x H 2.75 mm
D Wide Supply Voltage Range (2.4 V to 5.5 V) D Operational down to 2.0 V D Fewest External Components D Internal Current Control D High EMI Immunity D Receiver Output Tri-State
D Compatible to IrDA Telecom Standard D SMD Side View Soldering D Lowest Power Consumption
55 A Receive Mode, 1 A Shutdown
D Only 30 mA IRED Peak Current During
Transmission
Applications
Mobile Phones, Pagers, Personal Digital Assistants (PDA), Handheld Battery Operated Equipment
Document Number 82515 Rev. A1.2, 07-Jul-99
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TFDU4201
Vishay Telefunken Ordering Information
Part Number TFDU4201-TR1 TFDU4201-TR3 Qty / Reel 750 2250 Description Oriented in carrier tape for side view in mounting Oriented in carrier tape for side view in mounting
Functional Block Diagram
VCC
Tri-State-Driver Amplifier Comparator Rxd
Control Logic Controlled Driver Txd Control
SD
GND
Figure 1. Functional Block Diagram
Pin Description
Pin 1 2 3 4 5 6 7 8 Symbol IRED GND IRED GND Rxd VCC GND GND Txd SD Description Ground, IRED cathode Ground, IRED cathode Received data, tri-state, floating in shutdown mode Supply voltage Ground Ground Transmit data Shutdown I/O Active
O
LOW
I I
HIGH HIGH
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Document Number 82515 Rev. A1.2, 07-Jul-99
TFDU4201
Vishay Telefunken Absolute Maximum Ratings
Reference Point Pin 8, unless otherwise noted. Parameter Supply Voltage Range Input Current Output Sink Current Power Dissipation Junction Temperature Ambient Temperature Range (Operating) Storage Temperature Range Soldering Temperature Test Conditions Symbol VCC Min. -0.5 Typ. Max. 6 10 25 200 125 85 85 215 240 Unit V mA mA mW C C C C See Vishay Telefunken IrDA Design Guide <90 s, ton<20% Remarks All Input Pins See Figure 3
Ptot TJ Tamb Tstg t = 20 s @215C
-25 -25
Average IRED Current*) Repetitive Pulsed IRED*) Current Transmitter Data Input Voltage Receiver Data Output Voltage Virtual source size Method: (1-1/e) encircled energy *)
IIRED(DC) IIRED(RP) VTxd VRxd d -0.5 -0.5 2
125 500 VCC+0.5 VCC+0.5
mA mA V V mm
Compatible to Class 1 operation of IEC 60825 or EN60825 with worst case IrDA SIR pulse pattern, 115.2 kbit/s
Note: Maximum values of IRED. Cannot be reached due to implemented current source.
Electrical Characteristics
Tested for the following parameters (VCC = 2.4 V to 5.5 V, 25 C, unless otherwise stated) Parameter Transceiver Supported Data Rates Supply Voltage Range Test Conditions Base band VCC IS IS ISshdown IStr Symbol Min. Typ. 9.6 2.4 50 70 0.02 30 26 Max. 115.2 5.5 80 90 1 10 36 30 50 Unit kbit/s V A A A nA mA mA s , Receive Mode, full Temperature Range Entire Temperature Range Room Temperature 20C SIR transmit Time from Switching on VCC to Established Specified Operation Operational Down to 2.0 V Remarks
VCC = 2.4 V to 5.5 V, Ee = 0 VCC = 2.4 V to 5.5 V, Supply Current 10 klx Sunlight Shutdown Mode IRED Peak Current Transmitting Transceiver "Power On" Settling Time VCC = 5.5 V VCC = 2.4 V
Document Number 82515 Rev. A1.2, 07-Jul-99
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TFDU4201
Vishay Telefunken Optoelectronic Characteristics
Tested for the following parameters (VCC = 2.4 V to 5.5 V, 25 C, unless otherwise stated) Parameter Receiver Minimum Detection Threshold Irradiance Maximum Detection Threshold Irradiance Test Conditions || 15 VCC = 2.0 V - 5.5 V || 90 VCC = 5 V || 90 VCC = 3 V Symbol Ee, min Min. Typ 35 Max. 70 Unit mW/m2 Remarks
Ee, max Ee, max Ee,max,low
3300 8000
5000 15000 4 0.5 0.8
W/m2 W/m2 mW/m2 V V 4 mA ns ns s C = 15 pF, R = 2.2 k C = 15 pF, R = 2.2 k
Logic Low Receiver Input Irradiance Output Voltage Rxd
Active Non Active
VOL VOH VCC-0.5
Output Current Rxd VOL < 0.8 V Rise Time @Load: C = 15 pF, R = 2.2k Fall Time @Load: C = 15 pF, R = 2.2k Rxd Signal Electrical Output Pulse Width
tr tf 2.4 kbit/s, Input Pulse Length 1.41 s to 3/16 of bit Length 115.2 kbit/s, Input Pulse Length 1.41 s to 3/16 of bit Length Output Level = 0.5 VCC @ 40 mW/m2 tp
20 20 1.4
200 200 20
Rxd Signal Electrical Output Pulse Width
tp
1.4
8
s
Output Delay Time (Rxd), Leading Edge Optical Input to Electrical Output Jitter, Leading Edge of Over a Period of Output Signal 10 bit, 115.2 kbit/s Output Delay Time Output Level = (Rxd), Trailing Edge 0.5 VCC 40 mW/m2 Optical Input to Electrical Output Latency
tdl
1
2
s
tj
1
s s
tdt
6.5
tL
100
200
s
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Document Number 82515 Rev. A1.2, 07-Jul-99
TFDU4201
Vishay Telefunken
Optoelectronic Characteristics (continued)
Tested for the following parameters (VCC = 2.4 V to 5.5 V, 25 C, unless otherwise stated) Parameter Transmitter Logic Low Transmitter Input Voltage Logic High Transmitter Input Voltage Controlled Current Test Conditions Symbol VIL(Txd) VIH(Txd) Ie = 4 mW/sr - 28 mW/sr in || 15 IF1 = 25 mA to 35 mA IF1 Min. 0 2.4 25 30 Typ Max. 0.8 VCC 35 Unit V V mA Voltage Range 2.4 V to 5.5 V Remarks
Output Radiant Intensity, || 15 Peak Emission Wavelength Halfwidth of Emission Spectrum Optical Rise/Falltime
Ie p
4
8
28
880 60
900
mW/sr Current Controlled, 20% duty cycle. nm nm ns
Output Radiant Intensity Overshoot, Optical Rising Edge Peak to Peak Jitter
115.2 kHz Square Wave Signal (duty cycle 1:1) Logic Low Level Over a Period of 10 bits, Independent of Information Content tj
200
0.04 25 0.2
W/sr % s
Recommended SMD Pad Layout for the Transceiver TFDU4201
7 x 0.8
600
0.5
Peak Operating Current ( mA ) 500 400 300 200 100
Current derating as a function of the maximum forward current of IRED. Maximum duty cycle: 25%.
2.3 1 0.8
Transceiver leads to be soldered symmetrically on pads Figure 2. Pad Layout Figure 3 shows the current derating of the emitter chip as a function of ambient temperature and duty cycle, see absolute maximum ratings. This is for information only. The TFDU4201 has an internal current control. Therefore, most of this curve is not relevant for this device because the higher currents are not intended to be used.
8
0 -40 -20
14875
0
20
40
60
80 100 120 140
Temperature ( C )
Figure 3. Current Derating Diagram
Document Number 82515 Rev. A1.2, 07-Jul-99
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TFDU4201
Vishay Telefunken TFDU4201-(Mechanical Dimensions)
14484
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Document Number 82515 Rev. A1.2, 07-Jul-99
TFDU4201
Vishay Telefunken Appendix
Application Hints
The TFDU4201 does not need any external components when operated at a "clean" power supply. In a more noisy ambient it is recommended to add a capacitor and a resistor of 1 W to 10 W for noise suppression. A combination of a tantalum with a ceramics capacitor will be most efficient.
Shut down
To shut down the TFDU4201 into a standby mode the SD pin has to be set active.
Latency
The receiver is in specified conditions after the defined latency. In a UART related application after that time (typically 50 s) the receiver buffer of the UART must be cleared. Therefore the transceiver has to wait at least the specified latency after receiving the last bit before starting the transmission to be sure that the corresponding receiver is in a defined state. For more application circuits, see IrDC Design Guide and TOIM3...-series data.
Recommended Circuit Diagram
TFDU4201 Vcc C1: 4.7 mF C1 4 VCC 1, 2, 5, 6 GND 3 RxD 7 TxD 8 SD
GND
RxD TxD
SD
Table 1. Recommended Application Circuit Components
Component C1 4.7 mF
Recommended Value
Vishay Part Number 293D 475X9 016B 2T
Telecom (Low Power) IrDA Specification v. 1.2
Physical Parameter Parameter Value
Distance
Angle Link Speeds Minimum intensity Maximum intensity Minimum irradiance Maximum irradiance Receiver latency
Mobile to mobile: 0 to 20 cm Mobile to standard IR device: 0 to 30 cm +/- 15 degrees 9.6 kbit/s to 115.2 kbit/s, FIR will require searate discussion 3.6 mW/sr 28.8 mW/sr 9 mW/cm 2 (90 mW/m 2) 500 mW/cm2 (5 kW/m2) 500 ms
This table is a copy out of the IrDA physical layer version 1.2 spec. Italics: changed in Telecom low power standard compared to standard SIR
Document Number 82515 Rev. A1.2, 07-Jul-99
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TFDU4201
Vishay Telefunken Revision History:
A1.2, 07/04/1999: New edition A1.2, 08/07/1999: Correction of typos: 2.4 V instead of 2.7 V in the full context, and missing measurement conditions added.
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Document Number 82515 Rev. A1.2, 07-Jul-99
TFDU4201
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 82515 Rev. A1.2, 07-Jul-99
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