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TFBS4650-TR4 Datasheet(PDF) 5 Page - Vishay Siliconix |
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TFBS4650-TR4 Datasheet(HTML) 5 Page - Vishay Siliconix |
5 / 13 page TFBS4650 Infrared Transceiver, 9.6 kbit/s to 115.2 kbit/s (SIR) Vishay Semiconductors Document Number: 84672 For technical questions within your region, please contact one of the following: irdasupportAM@vishay.com, irdasupportAP@vishay.com, irdasupportEU@vishay.com www.vishay.com Rev. 1.5,16-Sep-09 5 Notes (1) 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. (2) This parameter reflects the backlight test of the IrDA physical layer specification to guarantee immunity against light from fluorescent lamps. (3) 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. (4) 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. (5) 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. (6) 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 (1) PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT RECEIVER Sensitivity: minimum irradiance Ee in angular range (2)(3) 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 λ = 850 nm to 900 nm Ee 5 (500) kW/m2 (mW/cm2) No receiver output input irradiance (4) 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 % (5) Input pulse width 1.63 µs tPW 1.7 2 2.9 µs Receiver start up time Power on delay 100 150 µs Latency tL 50 200 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 (6) α = 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 (6) α = 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 (6) VCC1 = 5 V, α = 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 λ p 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 topt 30 t 50 300 µs 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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