TFBS4652-TR3 datasheet(4/11 Pages) VISHAY

Part #	TFBS4652-TR3

Description	Infrared Transceiver, 9.6 kbit/s to 115.2 kbit/s (SIR)

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Manufacturer	VISHAY [Vishay Siliconix]

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4 / 11 page

TFBS4652

www.vishay.com

Vishay Semiconductors

Rev. 1.4, 28-Jan-14

4

Document Number: 84671

For technical questions within your region: irdasupportAM@vishay.com, irdasupportAP@vishay.com, irdasupportEU@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Notes

•Tamb = 25 °C, VCC = 2.4 V to 3.6 V unless otherwise noted. Typical values are for design aid only, not guaranteed nor subject to production

testing.

(1) This parameter reflects the backlight test of the IrDA physical layer specification to guarantee immunity against light from fluorescent lamps.

(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 related link errors. If placed at

the active output interface reference plane of the transmitter, the receiver must meet its bit error ratio (BER) specification. For more

definitions see the document “Symbols and Terminology” on the Vishay website

(4) RXD output is edge triggered by the rising edge of the optical input signal. The output pulse duration is independent of the input pulse

duration.

(5) The radiant intensity can be adjusted by the external current limiting resistor to adapt the intensity to the desired value. The given value is

for minimum current consumption. This transceiver can be adapted to > 50 cm operation by increasing the current to > 200 mA, e.g.

operating the transceiver without current control resistor (i.e. R1 = 0

Ω) and using the internal current control.

OPTOELECTRONIC CHARACTERISTICS

PARAMETER

TEST CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT

RECEIVER

Sensitivity:

minimum irradiance Ee in

angular range (1)(2)

9.6 kbit/s to 115.2 kbit/s

λ = 850 nm to 900 nm

Ee

40

(4)

81

(8.1)

mW/m2

(μW/cm2)

Maximum irradiance Ee in

angular range (3)

λ = 850 nm to 900 nm

Ee

5

(500)

kW/m2

(mW/cm2)

No output receiver input

irradiance

According to IrDA IrPHY 1.4,

appendix A1, fluorescent light

specification

Ee

4

(0.4)

mW/m2

(μW/cm2)

Rise time of output signal

10 % to 90 %, CL = 15 pF

tr (RXD)

20

100

ns

Fall time of output signal

90 % to 10 %, CL = 15 pF

tf (RXD)

20

100

ns

RXD pulse width of output

signal, 50 % (4)

Input pulse width

1.63 μs

tPW

1.7

2.9

μs

Receiver start up time

Power on delay

100

150

μs

Latency

tL

30

50

100

μs

TRANSMITTER

IRED operating current, current

controlled

The IRED current is internally

controlled but also can be

reduced by an external resistor R1

ID

200

400

mA

Output leakage IRED current

Tamb = 85°C

IIRED

1μA

Output radiant intensity (5)

a = 0°, 15°, TXD = high, SD = low,

VCC1 = 3 V, VCC2 = 3 V, R1 = 30

Ω

(resulting in about 50 mA drive

current)

Ie

4

150

mW/sr

Output radiant intensity (5)

a = 0°, 15°, TXD = high, SD = low,

VCC1 = 3 V, VCC2 = 3 V, R1 = 0

Ω,

IF = 300 mA

Ie

25

mW/sr

Output radiant intensity (5)

VCC1 = 5 V, a = 0°, 15°

TXD = low or SD = high

(receiver is inactive as long as

SD = high)

Ie

0.04

mW/sr

Saturation voltage of IRED

driver

VCC = 3 V, IF = 50 mA

VCEsat

0.4

V

Peak - emission wavelength

λp

880

886

900

nm

Optical rise time,

optical fall time

tropt,

tfopt

20

100

ns

Optical output pulse duration

Input pulse width t < 30 μs

Input pulse width t

≥ 30 μs

topt

30

t

50

300

μs

Optical output pulse duration

Input pulse width t = 1.63 μs

topt

1.45

1.61

2.2

μs

Optical overshoot

20

%

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