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TFBS4650-TR4 Datasheet(PDF) 2 Page - Vishay Siliconix |
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TFBS4650-TR4 Datasheet(HTML) 2 Page - Vishay Siliconix |
2 / 13 page TFBS4650 Vishay Semiconductors Infrared Transceiver, 9.6 kbit/s to 115.2 kbit/s (SIR) www.vishay.com For technical questions within your region, please contact one of the following: irdasupportAM@vishay.com, irdasupportAP@vishay.com, irdasupportEU@vishay.com Document Number: 84672 2 Rev. 1.5,16-Sep-09 FUNCTIONAL BLOCK DIAGRAM PINOUT TFBS4650, bottom view weight 0.05 g 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. IrPhy 1.3 extended the low power option to MIR and FIR and VFIR was added with IrPhy 1.4. A new version of the standard in any case obsoletes the former version. IRED Driver TXD SD GND VCC IREDA RXD Amplifier Comparator Tri-State Driver Mode Control PD IRED ASIC IREDC 19283 PIN DESCRIPTION PIN NUMBER SYMBOL DESCRIPTION I/O ACTIVE 1 IREDA IRED anode, connected via a current limiting resistor to VCC2. A separate unregulated power supply can be used. 2 IREDC IRED cathode, do not connect for standard operation. 3TXD Transmitter data input. Setting this input above the threshold turns on the transmitter. This input switches the IRED with the maximum transmit pulse width of about 100 µs. IHigh 4RXD Receiver output. Normally high, goes low for a defined pulse duration with the rising edge of the optical input signal. Output is a CMOS tri-state driver, which swings between ground and VCC. Receiver echoes transmitter output. O Low 5SD Shutdown. Logic low at this input enables the receiver, enables the transmitter, and un-tri-states the receiver output. It must be driven high for shutting down the transceiver. IHigh 6VCC Power supply, 2.4 V to 3.6 V. This pin provides power for the receiver and transmitter drive section. Connect VCC1 via an optional filter. 7 GND Ground 19284 |
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