TFDT4000 Edition January 7, 1996 Integrated Transceiver Description The TFDT4000 is an infrared transceiver for data communication systems. The transceiver is compatible to the IRDA standard and allows data rates up to 115 kbit/sAn internal AGC (Automatic Gain Control) ensures proper operation under EMI conditions. The internal IRED driver can be connected by the external current control resistor to an independent unregulated power supply. This will add more freedom in circuit design and efficient serial drive capability for external IREDs for high power applications. Features: Microcomputer compatible Fewest external components Low power consumption AGC for EMI immunity Open collector IRED driver Compatible to IRDA standard SMD top view and through hole side view Wide supply voltage range (2.7V...5.5V) Low Profile (height = 5.6 mm max.) Package: Pins, see pg. 7: 1: IRED Anode 2: IRED Cathode 3: Txd (Input) 4: Rxd (Output) 5: NC 6: VCC (Supply Voltage) 7: SC (Sensitivity Control) 8: Ground 2 stand off pins internally connected to ground. Block Diagram Vcc 6 Driver Amplifier 7 SC Comparator Rxd 4 1 AGC logic 3 Txd Open Collector Driver 2 8 GND 1 TFDT4000 Edition January 7, 1996 Absolute maximum ratings Reference Point Pin 8, unless otherwise noted. Parameter Test Conditions MAX Unit - 0.5 6 V - 0.5 6 V 10 mA 25 mA Ptot 200 mW Junction Temperature TJ 125 °C Ambient Temperature Range (Operating) Tamb 0 70 °C Storage temperature range Tstg - 25 85 °C 230 °C Supply Voltage Range Symbol MIN Vcc Voltage Range of IRED pin 1, Drive Output Txd "LOW" Input Currents TYP all pins except 1, 8, see IRED current Output Sinking Current Power Dissipation Soldering temperature t= 20 s @215°C 215 Remark s. derating curve, pg. 8 s. TEMIC IrDA Design Guide Average IRED current IIRED(DC) 100 mA Rep. pulsed IRED current IIRED(RP) 500 mA <90µs, t on<20% Peak IRED current IIRED(PK) 1 A <2µs, ton<10% IRED Anode Voltage VIREDA - 0.5 Vcc+0.5 V Transmitter Data Input Voltage VTxd - 0.5 Vcc+0.5 V Receiver Data Output Voltage VRxd - 0.5 Vcc+0.5 V 2 TFDT4000 Edition January 7, 1996 Optoelectronic characteristics Tamb = 25°C, V cc=5V unless otherwise noted. Parameter Test condition Symbol MIN TYP MAX Unit 115.2 kBit/s Remark Transceiver Supported data rates Base band Supply voltage range 2.4 Vcc 2.7 5 5.5 V IrDA SIR mode reduced function down to 2.5V Supply current, pin 6 Vcc=5V IS 1.3 2.5 mA Supply current, pin 6 Vcc=3V IS 1.0 1.5 mA Leakage current of IR emitter , pin 1 Vcc, pin 6: Off, IS 0.005 0.5 µA s. appl. hint, page 6 50 µs Time from switching on Vcc to established specified operation 0.020 0.035 Wm-2 SIR mode∗∗) 0.015 Wm-2 SIR mode **) Txd: "LOW" Vcc2 = 6V T=-25°C to 85°C Transceiver power on settling time Receiver Min. detection threshold irradiance, SC="LOW" α=±15° Eemin Min. detection threshold irradiance, SC="HIGH" α=±15° Eemin 0.006 0.010 Max. detection threshold irradiance α=±90°, Vcc=5V Eemax 3300 5000 Wm-2 SIR mode **) Max. detection threshold irradiance α=±90°, Vcc=3V Eemax 8000 15000 Wm-2 SIR mode **) Logic Low Receiver Input Irradiance, SC="HIGH" or SC="LOW" Eemaxlow Output voltage Rxd active VOL Output voltage Rxd non active VOH Output current VOL<0.8V ∗∗) 0.5 Vcc-0.5 4 0.004 Wm-2 0.8 V C=15pF, R=2.2k V C=15pF, R=2.2k mA BER=10 -8 (IrDA specification) 3 TFDT4000 Edition January 7, 1996 Optoelectronic characteristics Tamb = 25°C, V cc=5V unless otherwise noted. Parameter Test condition Symbol MIN Rise time @load= C=15pF, R=2.2k tr Fall time @load= C=15pF, R=2.2k TYP MAX Unit 20 200 ns tf 20 200 ns Remark Receiver, cont. Rxd signal electrical output pulse width 2.4 kBit/s, input pulse length 1.41µs to 3/16 of bit length tp 1.41 20 µs Rxd signal electrical output pulse width 115.2 kBit/s, input pulse length 1.41µs to 3/16 of bit length tp 1.41 8 µs Rxd signal electrical output pulse width 500 kHz, duty cycle 50% tp 0.8 1 1.2 µs Vcc = 5 V only Output delay time (Rxd) Output level = 0.5*Vcc @ tdl 1 2 µs Delay of leading edge of output signal related to leading edge of optical input signal Ee=0.040 W/m 2 Jitter, leading edge of output signal Over a period of 10bit, 115.2 kBd tj 2 µs Output delay time (Rxd) Output level = 0.5*Vcc tdt 6.5 µs Latency Recovery from last transmitted pulse to 1.1*threshold sensitivity tL 100 800 µs Current limiting resistor in series to IRED: RS= 8.2 Ω @ 5 Vcc2=5V Id 0.3 0.5 A Delay of trailing edge of output signal related to trailing edge of optical input signal Transmitter Driver current IRED Logic Low Transmitter Input Voltage VIL(Txd) 0 0.8 V Logic High Transmitter Input Voltage VIH(Txd) 2.4 Vcc V Id can be adjusted by variation of R S, see appl. hint page 6 4 TFDT4000 Edition January 7, 1996 Optoelectronic characteristics Tamb = 25°C, V cc=5V unless otherwise noted. Parameter Test condition Symbol MIN TYP MAX 45 150 200 Unit Remark Transmitter, cont. Output Radiant Intensity, α=±15° Current limiting resistor in series to IRED: RS = 8.2 Ω, Vcc2=5V Angle of half intensity α Peak wavelength of emission λp Halfwidth of Emission Spectrum 850 ° 900 60 Optical Rise/Falltime 115.2 kHz square wave signal (duty cycle: 1:1) Output Radiant Intensity logic low level 200 Overshoot, optical Rising edge peak to peak jitter ±24 Over a period of 10 bits, independent of information content tj mW/sr in agreement with prospective future eye safety limits of IEC825 nm nm 600 ns 0.04 µW/sr 25 % 0.2 µs 5 TFDT4000 Edition January 7, 1996 Mechanical Dimensions Package Outlline Drawing. Dimensions in mm Pin Assignment Pin# PIN NAME 1 IRED Anode 2 IRED Cathode 3 I/O ACTIVE IRED Anode O LOW IRED Cathode, internally connected to driver transistor O LOW Txd Transmit data I HIGH 4 Rxd Received data O LOW 5 NC 6 Vcc Supply voltage 7 SC Sensitivity control I HIGH 8 GND - DESCRIPTION Ground 2 stand off pins Internally connected to ground 6 TFDT4000 Edition January 7, 1996 Recommended SMD pads for the TFDT4000 transceiver 600 Current derating as a max. duty cycle 20% function of the maximum forward current of IRED and max. duty cycle Peak operating current [mA] 500 400 300 max. duty cycle 50% 200 100 0 0 20 40 60 80 100 120 140 Temperature [°C] Current derating as a function of ambient temperature and max. duty cycle 7 TFDT4000 Edition January 7, 1996 0° 100% Angular emission characteristic 10° 20° 30° 50% 120 Rel. output intensity [%] 100 80 60 40 20 0 -60 -40 -20 0 20 40 60 Angle [°] 8 TFDT4000 Edition January 7, 1996 0° 10° Angular receiving characteristic 20° 100% 30° 50% 100 Rel. sensitivity [%] 80 60 40 20 0 -60 -40 -20 0 20 40 60 Angle [°] 9