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TFBS4711 Datasheet

Vishay Semiconductor Opto Division

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Datasheet

TFBS4711
www.vishay.com Vishay Semiconductors
Rev. 3.3, 08-Apr-2019 1Document Number: 82633
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Serial Infrared Transceiver (SIR), 115.2 kbit/s,
2.4 V to 5.5 V Operation
DESIGN SUPPORT TOOLS AVAILABLE
DESCRIPTION
The TFBS4711 is a low profile, infrared data transceiver
module. It supports IrDA® data rates up to 115.2 kbit/s (SIR).
The transceiver module consists of a PIN photodiode, an
infrared emitter (IRED), and a low-power CMOS control IC to
provide a total front-end solution in a single package.
The device is designed for the low power IrDA standard with
an extended range on-axis up to 1 m. The RXD output pulse
width is independent of the optical input pulse width and
stays always at a fixed pulse width thus making the device
optimum for standard endecs. TFBS4711 has a tri-state
output and is floating in shut-down mode with a weak
pull-up. The shut down (SD) feature cuts current
consumption to typically 10 nA.
FEATURES
Compliant with the latest IrDA physical layer low
power specification (9.6 kbit/s to 115.2 kbit/s)
Small package (H x L x W in mm): 1.9 x 6 x 3
Typical link distance on-axis up to 1 m
Battery and power management features:
> Idle current -70 μA typical
> Shutdown current -10 nA typical
> Operates from 2.4 V to 5.5 V within specification over full
temperature range from -30 °C to +85 °C
Remote control - transmit distance up to 8 m
Tri-state receiver output, floating in shutdown with a weak
pull-up
Constant RXD output pulse width (2.2 μs typical)
Meets IrFM fast connection requirements
• Split power supply, an independent, unregulated supply
for IRED anode and a well regulated supply for VCC
Directly interfaces with various super I/O and controller
devices and encoder / decoder
Qualified for lead (Pb)-free and Sn/Pb processing (MSL4)
Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
• Ideal for battery operated devices
• PDAs
• Mobile phones
• Electronic wallet (IrFM)
• Notebook computers
• Digital still and video cameras
• Printers, fax machines, photocopiers, screen projectors
• Data loggers
• External infrared adapters (dongles)
• Diagnostics systems
• Medical and industrial data collection devices
• Kiosks, POS, point and pay devices
• GPS
• Access control
• Field programming devices
20208
3
3
D
D
3
D
3D Models
PARTS TABLE
PART NUMBER DESCRIPTION QTY/REEL
TFBS4711-TR1 Oriented in carrier tape for side view surface mounting 1000 pcs
TFBS4711-TR3 Oriented in carrier tape for side view surface mounting 2500 pcs
TFBS4711-TT1 Oriented in carrier tape for top view surface mounting 1000 pcs
TFBS4711
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Rev. 3.3, 08-Apr-2019 2Document Number: 82633
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FUNCTIONAL BLOCK DIAGRAM
PINOUT
TFBS4711
weight 50 mg
Definitions:
In the Vishay transceiver datasheets the following
nomenclature is used for defining the IrDA operating modes:
SIR: 2.4 kbit/s to 115.2 kbit/s, equivalent to the basic serial
infrared standard with the physical layer version IrPhy 1.0
MIR: 576 kbit/s to 1152 kbit/s
FIR: 4 Mbit/s
VFIR: 16 Mbit/s
MIR and FIR were implemented with IrPhy 1.1, followed by
IrPhy 1.2, adding the SIR low power standard.
PRODUCT SUMMARY
PART NUMBER DATA RATE
(kbit/s)
DIMENSIONS
H x L x W
(mm)
LINK DISTANCE
(m)
OPERATING
VOLTAGE
(V)
IDLE SUPPLY
CURRENT
(mA)
TFBS4711 115.2 1.9 x 6 x 3 0 to 0.7 2.4 to 5.5 0.07
18282
Controlled driver
Push-pull
driver
GND
TXD
RXD
V
CC2
V
CC1
Amplifier Comparator
SD Logic
and
control
REDC
19428
Pin 1
PIN DESCRIPTION
PIN
NUMBER SYMBOL DESCRIPTION I/O ACTIVE
1
VCC2
IRED
anode
Connect IRED anode directly to the power supply (VCC2). IRED current can be decreased
by adding a resistor in series between the power supply and IRED anode. A separate
unregulated power supply can be used at this pin
2TXD
This Schmitt-Trigger input is used to transmit serial data when SD is low. An on-chip
protection circuit disables the LED driver if the TXD pin is asserted for longer than 100 μs.
The input threshold voltage adapts to and follows the logic voltage swing defined by the
applied supply voltage
IHigh
3RXD
Received data output, push-pull CMOS driver output capable of driving standard CMOS or
TTL loads. During transmission the RXD output is active and mirrors the transmit signal. No
external pull-up or pull-down resistor is required. Floating with a weak pull-up of
500 kΩ (typ.) in shutdown mode. The voltage swing is defined by the applied supply
voltage
OLow
4SD
Shutdown. The input threshold voltage adapts to and follows the logic voltage swing
defined by the applied supply voltage IHigh
5V
CC1 Supply voltage
6GND Ground
TFBS4711
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Rev. 3.3, 08-Apr-2019 3Document Number: 82633
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Note
Reference point ground, pin 6 unless otherwise noted.
Typical values are for design aid only, not guaranteed nor subject to production testing.
We apologize to use sometimes in our documentation the abbreviation LED and the word light emitting diode instead of infrared emitting
diode (IRED) for IR-emitters. That is by definition wrong; we are here following just a bad trend
Note
Vishay transceivers operating inside the absolute maximum ratings are classified as eye safe according the above table
ABSOLUTE MAXIMUM RATINGS
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply voltage range, transceiver -0.3 V < VCC2 < 6 V VCC1 -0.5 - +6 V
Supply voltage range, transmitter -0.5 V < VCC1 < 6 V VCC2 -0.5 - +6 V
RXD output voltage -0.5 V < VCC1 < 6 V VRXD -0.5 - VCC1 + 0.5 V
Voltage at all inputs Note: Vin VCC1 is allowed Vin -0.5 - +6 V
Input current For all pins except IRED anode pin ICC --10mA
Output sink current --25mA
Power dissipation PD- - 250 mW
Junction temperature Tj- - 125 °C
Ambient temperature range (operating) Tamb -30 - +85 °C
Storage temperature range Tstg -40 - +100 °C
Soldering temperature See recommended solder profile - - 260 °C
Average output current, pin 1 IIRED (DC) - - 85 mA
Repetitive pulsed output current
pin 1 to pin 2 t < 90 μs, ton < 20 % IIRED (RP) - - 430 mA
ESD protection VESD 1--kV
Latchup |± 100| - - mA
Thermal resistance junction-to-ambient JESD51 RthJA - 300 - K/W
EYE SAFETY INFORMATION
STANDARD CLASSIFICATION
IEC/EN 60825-1 (2007-03), DIN EN 60825-1 (2008-05) “SAFETY OF LASER PRODUCTS -
Part 1: equipment classification and requirements”, simplified method Class 1
IEC 62471 (2006), CIE S009 (2002) “Photobiological Safety of Lamps and Lamp Systems” Exempt
DIRECTIVE 2006/25/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 5th April 2006 on the
minimum health and safety requirements regarding the exposure of workers to risks arising from physical agents
(artificial optical radiation) (19th individual directive within the meaning of article 16(1) of directive 89/391/EEC)
Exempt
TFBS4711
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Rev. 3.3, 08-Apr-2019 4Document Number: 82633
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Notes
Typical values are for design aid only, not guaranteed nor subject to production testing
(1) SD mode becomes active when SD is set high for more than 0.2 μs. In SD mode the detector is disabled and the output disconnected
ELECTRICAL CHARACTERISTICS (Tamb = 25 °C, VCC1 = VCC2 = 2.4 V to 5.5 V unless otherwise noted)
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
TRANSCEIVER
Supply voltage VCC1 2.4 - 5.5 V
Operating temperature range TA-30 - +85 °C
Data rates 9.6 - 115.2 kbit/s
Idle supply current at VCC1
(receive mode, no signal)
SD = low,
Tamb = -25 °C to +85 °C
independent of ambient light,
VCC1 = VCC2 = 2.4 V to 5.5 V
ICC1 40 70 150 μA
SD = low, Tamb = 25 °C,
VCC1 = VCC2 = 2.4 V to 5.5 V ICC1 40 70 100 μA
Average dynamic supply
current, transmitting IIRED = 300 mA, 20 % duty cycle ICC1 -0.62mA
Standby (SD) (1) supply current
SD = high,
Tamb = -25 °C to +85 °C,
independent of ambient light
ISD -0.011 μA
RXD to VCC1 impedance SD = high RRXD 400 500 600 kΩ
Input voltage low (TXD, SD) VILo -0.3 - 0.4 V
Input voltage high (SD) For compliance with ISD spec. VIHi VCC1 - 0.3 - 6 V
Input voltage high (TXD) VIHi VCC1 - 0.5 - 6 V
Input leakage current low VILo 0.3 V IILo -0.011A
Input leakage current high VIHi VCC1 - 0.3 V IIHi -0.011A
Input capacitance (TXD, SD) CIN --5pF
Output voltage low, RXD Cload = 8 pF, IOLo |+500 μA| VOLo --0.4V
Output voltage high, RXD IOH = -200 μA VOHi 0.8 x VCC1 -V
CC1 V
OPTOELECTRONIC CHARACTERISTICS (Tamb = 25 °C, VCC1 = VCC2 = 2.4 V to 5.5 V unless otherwise noted)
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
RECEIVER
Minimum irradiance Ee in
angular range (2)
9.6 kbit/s to 115.2 kbit/s
λ = 850 nm to 900 nm, α = 0°, 15° Ee-35
(3.5)
80
(8)
mW/m2
(μW/cm2)
Maximum irradiance Ee in
angular range (3) λ = 850 nm to 900 nm Ee-5
(500) -kW/m2
(mW/cm2)
Maximum no detection
irradiance (1)
λ = 850 nm to 900 nm, tr, tf < 40 ns,
tpo = 1.6 μs at f = 115 kHz,
no output signal allowed
Ee4
(0.4) --
mW/m2
(μW/cm2)
Rise time of output signal 10 % to 90 %, CL = 8 pF tr(RXD) 10 30 80 ns
Fall time of output signal 90 % to 10 %, CL = 8 pF tf(RXD) 10 30 80 ns
RXD pulse width of output
signal Input pulse length > 1.2 μs tPW 1.7 2.2 3 μs
Stochastic jitter, leading edge Input irradiance = 100 mW/m2,
115.2 kbit/s - - 350 ns
Standby/shutdown delay,
receiver startup time
After shutdown active
or power-on - 100 500 μs
Latency tL- 50 150 μs
TFBS4711
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Rev. 3.3, 08-Apr-2019 5Document Number: 82633
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Notes
Typical values are for design aid only, not guaranteed nor subject to production testing
(1) Equivalent to IrDA background light and electromagnetic field test: fluorescent lighting immunity
(2) IrDA sensitivity definition: minimum irradiance Ee in angular range, power per unit area. The receiver must meet the BER specification while
the source is operating at the minimum intensity in angular range into the minimum half-angular range at the maximum link length
(3) Maximum irradiance Ee in angular range, power per unit area. The optical delivered to the detector by a source operating at the maximum
intensity in angular range at minimum link length must not cause receiver overdrive distortion and possible ralated link errors. If placed at
the active output interface reference plane of the transmitter, the receiver must meet its bit error ratio (BER). For more definitions see the
document “Symbols and Terminology” on the Vishay website
(4) Using an external current limiting resistor is allowed and recommended to reduce IRED intensity and operating current when current
reduction is intended to operate at the IrDA low power conditions. E.g. for VCC2 = 3.3 V a current limiting resistor of RS = 56 Ω will allow a
power minimized operation at IrDA low power conditions
(5) Due to this wavelength restriction compared to the IrDA spec of 850 nm to 900 nm the transmitter is able to operate as source for the
standard remote control applications with codes as e.g. Phillips RC5/RC6® or RECS 80
RECOMMENDED SOLDER PROFILES
Solder Profile for Sn/Pb Soldering
Fig. 1 - Recommended Solder Profile for Sn/Pb Soldering
Lead (Pb)-free, Recommended Solder Profile
The TFBS4711 is a lead (Pb)-free transceiver and qualified
for lead (Pb)-free processing. For lead (Pb)-free solder paste
like Sn(3.0 - 4.0)Ag(0.5 - 0.9)Cu, there are two standard reflow
profiles: Ramp-Soak-Spike (RSS) and Ramp-To-Spike
(RTS). The Ramp-Soak-Spike profile was developed
primarily for reflow ovens heated by infrared radiation. With
widespread use of forced convection reflow ovens the
Ramp-To-Spike profile is used increasingly. Shown in
figure 2 is Vishay’s recommended profiles for use with the
TFBS4711 transceivers. For more details please refer to the
application note “SMD Assembly Instructions”.
Wave Soldering
For TFDUxxxx and TFBSxxxx transceiver devices wave
soldering is not recommended.
Manual Soldering
Manual soldering is the standard method for lab use.
However, for a production process it cannot be
recommended because the risk of damage is highly
dependent on the experience of the operator. Nevertheless,
we added a chapter to the above mentioned application
note, describing manual soldering and desoldering.
TRANSMITTER
IRED operating current
limitation
No external resistor for current
limitation (5) ID200 300 430 mA
Forward voltage of built-in IRED IF = 300 mA Vf1.4 1.8 1.9 V
Output leakage IRED current TXD = 0 V, 0 < VCC1 < 5.5 V IIRED -1 0.01 1 μA
Output radiant intensity
VCC = 2.7 V, α = 0°, 15°
TXD = high, SD = low Ie25 65 150 mW/sr
VCC1 = 5 V, α = 0°, 15°,
TXD = low or SD = high (receiver is
inactive as long as SD = high)
Ie--0.04mW/sr
Output radiant intensity, angle
of half intensity α 24- deg
Peak-emission wavelength (5) λp880 - 900 nm
Spectral bandwidth Δλ -45-nm
Optical rise time tropt 10 50 300 ns
Optical fall time tfopt 10 50 300 ns
Optical output pulse duration Input pulse width 1.6 < tTXD < 23 μs topt tTXD - 0.15 - tTXD + 0.15 μs
Input pulse width tTXD 23 μs topt 23 50 100 μs
Optical overshoot --25%
OPTOELECTRONIC CHARACTERISTICS (Tamb = 25 °C, VCC1 = VCC2 = 2.4 V to 5.5 V unless otherwise noted)
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
0
20
40
60
80
100
120
140
160
180
200
220
240
260
0 50 100 150 200 250 300 350
Time (s)
Temperature (°C)
2 °C/s to 4 °C/s
2 °C/s to 4 °C/s
10 s max. at 230 °C
120 s to 180 s
90 s max.
19431
TFBS4711
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Storage
The storage and drying processes for all Vishay transceivers
(TFDUxxxx and TFBSxxx) are equivalent to MSL4.
The data for the drying procedure is given on labels on the
packing and also in the application note “Taping, Labeling,
Storage and Packing”.
Fig. 2 - Solder Profile, RSS Recommendation
RECOMMENDED CIRCUIT DIAGRAM
Operated with a clean low impedance power supply the
TFBS4711 needs no additional external components.
However, depending on the entire system design and board
layout, additional components may be required (see figure
1).
Fig. 3 - Recommended Application Circuit
Note
*) R1 is optional when reduced intensity is used
The capacitor C1 is buffering the supply voltage and
eliminates the inductance of the power supply line. This one
should be a Tantalum or other fast capacitor to guarantee
the fast rise time of the IRED current. The resistor R1 is the
current limiting resistor, which may be used to reduce the
operating current to levels below the specified controlled
values for saving battery power.
Vishay’s transceivers integrate a sensitive receiver and a
built-in power driver. The combination of both needs a
careful circuit board layout. The use of thin, long, resistive
and inductive wiring should be avoided. The shutdown input
must be grounded for normal operation, also when the
shutdown function is not used.
The inputs (TXD, SD) and the output RXD should be directly
connected (DC - coupled) to the I/O circuit. The capacitor
C2 combined with the resistor R2 is the low pass filter for
smoothing the supply voltage. R2, C1 and C2 are optional
and dependent on the quality of the supply voltages VCC1
and injected noise. An unstable power supply with dropping
voltage during transmision may reduce the sensitivity (and
transmission range) of the transceiver.
The placement of these parts is critical. It is strongly
recommended to position C2 as close as possible to the
transceiver pins.
When extended wiring is used as in bench tests the
inductance of the power supply can cause dynamically a
voltage drop at VCC2. Often some power supplies are not
able to follow the fast current rise time. In that case another
4.7 μF (type, see table under C1) at VCC2 will be helpful.
Under extreme EMI conditions as placing an
RF-transmitter antenna on top of the transceiver, we
recommend to protect all inputs by a low-pass filter, as a
minimum a 12 pF capacitor, especially at the RXD port. The
transceiver itself withstands EMI at GSM frequencies above
500 V/m. When interference is observed, the wiring to the
inputs picks it up. It is verified by DPI measurements that as
long as the interfering RF - voltage is below the logic
threshold levels of the inputs and equivalent levels at the
outputs no interferences are expected.
One should keep in mind that basic RF - design rules for
circuits design should be taken into account. Especially
longer signal lines should not be used without termination.
See e.g. “The Art of Electronics” Paul Horowitz, Winfield Hill,
1989, Cambridge University Press, ISBN: 0521370957.
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
0 50 100 150 200 250 300 350
Time (s)
Temperature (°C)
20 s
2 °C...4 °C/s
2 °C...4 °C/s
90 s...120 s
T
217 °C for 50 s max
T
peak = 260 °C max.
50 s max.
T
255 °C for 20 s max
19261
19295-2
VIRED
VCC
GND
SD
TXD
RXD
VCC2, IRED A
VCC1
Ground
SD
TXD
RXD
R2
R1(1)
C1 C2
TABLE 1 - RECOMMENDED APPLICATION
CIRCUIT COMPONENTS
COMPONENT RECOMMENDED
VALUE VISHAY PART NUMBER
C1 4.7 μF, 16 V 293D 475X9 016B
C2 0.1 μF, ceramic VJ 1206 Y 104 J XXMT
R1 Depends on current
to be adjusted
R2 47 Ω, 0.125 W CRCW-1206-47R0-F-RT1
TFBS4711
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Fig. 4 - Typical Application Circuit
Figure 4 shows an example of a typical application for to
work with a separate supply voltage VS and using the
transceiver with the IRED anode connected to the
unregulated battery Vbatt. This method reduces the peak
load of the regulated power supply and saves therefore
costs. Alternatively all supplies can also be tied to only one
voltage source. R1 and C1 are not used in this case and are
depending on the circuit design in most cases not
necessary.
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.
For operating at RS232 ports the ENDECS TIR1000 or
MCP2122 is recommended.
Note
TFBS4711 echoes the TXD signal at the RXD output during
transmission. For communication this signal is to be correctly
ignored by the controller or the software. The echo signal is
implemented for test purposes in mass production
19296-2
Vbatt 3 V to 3.6 V
VS = 3.3 V
Vdd
IRTX
IRRX
IR MODE
R2
C2
IRED Anode
TXD
RXD
SD
GND
VCC1
TFBS4711
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PACKAGE DIMENSIONS in millimeters
Fig. 5 - Package Drawing of TFBS4711, Tolerance of Height is +0.1 mm, -0.2 mm, other Tolerances ± 0.2 mm
Fig. 6 - Soldering Footprints
TABLE 2 - TRUTH TABLE
INPUTS OUTPUTS REMARK
SD TXD OPTICAL INPUT IRRADIANCE
mW/m2RXD TRANSMITTER OPERATION
High
> 1 ms xx
Weakly pulled
(500 Ω) to VCC1 0 Shutdown
Low High x Low (active) IeTransmitting
Low High
> 100 μs x High inactive 0 Protection is active
Low Low < 4 High inactive 0
Ignoring low signals below the
IrDA defined threshold for
noise immunity
Low Low > min. detection threshold irradiance
< max. detection threshold irradiance Low (active) 0 Response to an IrDA compliant
optical input signal
Low Low > min. detection threshold irradiance Undefined 0 Overload conditions can cause
unexpected outputs
19612
19728 Emitter Detector
5 x 0.95 = 4.75
0.95 0.64
12 3 4 5 6
0.4
1.27
Recommended Footprint
Side View Application
19301
Emitter Detector
5 x 0.95 = 4.75
0.95 0.64
123 45 6
0.6
1.27
Recommended Footprint
Top View Application
TFBS4711
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REEL DIMENSIONS in millimeters
TAPE WIDTH
(mm)
A MAX.
(mm)
N
(mm)
W1 MIN.
(mm)
W2 MAX.
(mm)
W3 MIN.
(mm)
W3 MAX.
(mm)
16 330 50 16.4 22.4 15.9 19.4
14017
Drawing-No.: 9.800-5090.01-4
Issue: 1; 29.11.05
TFBS4711
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TAPE DIMENSIONS FOR TR in millimeters
19613
TFBS4711
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TAPE DIMENSIONS FOR TT in millimeters
20416
Legal Disclaimer Notice
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Revision: 01-Jan-2019 1Document Number: 91000
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
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Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
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Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
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or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2019 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED

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