INTEGRATED CIRCUITS DATA SHEET TDA1581T Decoder for traffic warning (VWF) radio transmissions Preliminary specification File under Integrated Circuits, IC01 March 1992 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T FEATURES GENERAL DESCRIPTION • Selective subcarrier amplifier (57 kHz) with gain control The TDA1581T decoder is for radio transmissions having 57 kHz amplitude-modulated subcarriers as used in the german ‘Verkehrs Warnfunk’ (VWF) traffic warning system. • Transmitter identification signal (SK) decoder • Area identification signal (BK) and announcement identification signal (DK) active filtering • BK and DK decoders (Schmitt trigger with switched hysteresis) • BK and DK switch-on/switch-off delay circuits • SK and BK control outputs. QUICK REFERENCE DATA Measured in Fig.3 at ViSK = 8 mV; f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for ‘BK-traffic area C’ signal; or with fm = 125 Hz and m = 30% for DK signal SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP supply voltage range 7.5 8.5 10 V IP supply current − 6 − mA ViSK nominal input voltage f = 57 kHz − 8 − mV Zi input impedance f ≤ 57 kHz 100 − − kΩ ViSK control level −3 dB − 2.4 − mV Vi(p-p) input voltage peak-to-peak value 2 − − V mBKon SK switch-on threshold level − 42 − % ∆mBK SK switch hysteresis − 3.5 − dB tdSKon SK switch-on delay − 150 − ms tdSKoff SK switch-off delay − 750 − ms mDKon DK switch-on threshold level − 13 − % ∆mDK DK switch hysteresis − 3.6 − dB tdDKon DK switch-on delay − 750 − ms tdDKoff DK switch-off delay − 750 − ms Tamb operating ambient temperature range −30 − +80 °C ORDERING INFORMATION PACKAGE EXTENDED TYPE NUMBER PINS PIN POSITION MATERIAL CODE TDA1581T 20 SO plastic SOT163A(1) Note 1. SOT163-1; 1996 August 28. March 1992 2 Philips Semiconductors Preliminary specification TDA1581T Fig.1 Block diagram. Decoder for traffic warning (VWF) radio transmissions March 1992 3 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T PINNING SYMBOL PIN DESCRIPTION n.c. 1 not connected DKout 2 DK output current SKout 3 SK output current τBK 4 time delay BK V5BK 5 filter output BK V6BK 6 filter input BK VP 7 supply voltage VP / 2 8 half supply voltage V9SK 9 SK detector output n.c. 10 not connected n.c. 11 not connected V12SK 12 57 kHz band pass filter VAGC 13 AGC I14 14 prestage biasing current VMPX 15 MPX input V16DK 16 filter input DK V17DK 17 filter output DK τDK 18 time delay DK I19 19 reference current for BK, DK detector GND 20 ground March 1992 Fig.2 Pin configuration. 4 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T LIMITING VALUES In accordance with the Absolute Maximum System (IEC134). SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP = V7-20 supply voltage pin 7 − − 15 V V2; 3-20 switch output voltage pins 2 or 3 −0.5 − 15 V I2; 3 switch output current pins 2 or 3 −10 − 5 mA V15-20 signal input voltage pin 15 −0.5 − VP V I15 signal input current pin 15 − − −10 mA Ptot total power dissipation − − 800 mW Tstg storage temperature range −55 − +150 °C Tamb operating ambient temperature range −30 − +80 °C CHARACTERISTICS Vp = 8.5 V; Tamb = +25 °C; measured at nominal input signal: ViSK = 8 mV, f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for ‘BK-traffic area C’ signal; or with fm = 125 Hz and m = 30% for DK signal. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP supply voltage pin 7 7.5 − 10 V IP supply current pin 7 − 6 15 mA f ≤ 57 kHz 60 − − kΩ SK amplifier/decoder Zi input impedance Vi(p-p) input voltage (peak-to-peak value) ViSK input voltage at start of gain control Gv9-15 voltage gain 2 − − V Vo9BK = −3 dB − 2.4(1) − mV V9BK / V15SK − 44(1) − dB ∆Gv9-15 gain spread − − ±2 dB ∆Gv gain control range 40 − − dB Vo9BK controlled output voltage − 440 − mV − 220 − mV 600 670 750 mV 3 3.5 4 dB 0.8 0.88 0.97 V − − 0.5 mA Vo9DK BK circuit Vo5BKon switch-on threshold level V o5BKon ---------------------V o5BKoff switch hysteresis V4-20off BK switch threshold level for BK-off (SK-off) (typ. value = 0.21V8-20) pin 3 high-Z pin 3 conducting SK output (pin 3) I3 permitted load current V3-20sat saturation voltage I3 = 1.5 mA − − 0.35 V V3-20 rejection voltage I3 < 5 µA 18 − − V March 1992 5 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions SYMBOL PARAMETER TDA1581T CONDITIONS MIN. TYP. MAX. UNIT DK circuit V17DKon switch-on threshold level V 17DKon ---------------------V 17DKoff switch hysteresis V18-20off DK switch threshold level for DK-off (Schmitt trigger output) (typ. value = 1 × VBE) I2 permitted load current V2-20sat saturation voltage V2-20 rejection voltage pin 2 high-Z 600 670 750 mV 3.1 3.6 4.1 dB − 0.6 − V − − 0.5 mA I2 = 1.5 mA − − 0.35 V I2 < 5 µA 18 − − V f = 100 Hz 84 − − dB 120 − − dB pin 2 conducting DK output (pin 2) BK and DK filter amplifiers Go open loop gain Gi current gain Ii input bias current Vo5-8 output offset voltage − − ±50 nA R5-6 = R16-17 = 680 kΩ − − ±50 mV V17-8 Io available output current ±1 − − mA Ro output resistance − 2 3.5 kΩ CL permitted load capacitance − − 50 pF Internal reference voltage V8-20 output voltage (typ. value = 0.5VP) 4.0 4.25 4.5 V R8 internal resistance of voltage source − − 5 Ω I8-20 available output current I20-8 I8sc output short-circuit current (typ. value = VP / 1 kΩ) −2 − − mA 0.6 − − mA − −8 − mA Reference current source V19-20 reference voltage (typ. value = V8-20 − VBE) − 3.6 − V Ri19 internal biasing resistor − 5 − kΩ R19-20 permitted range of external reference resistor 180 − 270 kΩ Note 1. selectable by R14-8 or Z12-8. March 1992 6 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T APPLICATION INFORMATION (see Fig.3) SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT ViSKon SK switch-on threshold level mBK = 60 % − 1.8 − mV mBKon SK switch-on threshold level ViSK = 8 mV − 32 − % m BKon ----------------m BKoff SK switch hysteresis 3.0 3.5 4.0 dB tdSKon SK switch-on delay − 95 200 ms tdSKoff SK switch-off delay note 2 380 500 700 ms ViDKon DK switch-on threshold level mDK = 30 % − 1.5 − mV mDKon DK switch-on threshold level ViDK = 8 mV − 13 − % m DKon ----------------m DKoff DK switch hysteresis 3.1 3.6 4.1 dB tdDKon DK switch-on delay note 1 − 750 1000 ms tdDKoff DK switch-off delay note 2 600 750 1000 ms note 1 Notes to the application information 1. Sequence for measuring switch-on delay times (tdon) a) Nominal BK or DK input signal at pin 15: Vi(p-p)= 8 mV; f = 57 kHz; modulation-on. b) Pin 4 of the BK detector (pin 18 of the DK detector) is switched to ground to cause a low signal at the SK output at pin 3 (DK output at pin 2). c) tdon commences when the ground connection is removed from pin 4 (pin 18) as the positive-going VoBK signal at pin 5 (VoDK signal at pin 17) crosses zero. tdon ends when the positive-going edge of the SK output arrives at pin 15 (DK at pin 2). 2. Sequence for measuring switch-off delay times (tdoff) a) Nominal operating conditions as in note 1. b) tdoff commences when the input is switched off as the negative-going VoBK signal at pin 5 (VoDK signal at pin 17) crosses zero. tdoff ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2). March 1992 7 Philips Semiconductors Preliminary specification TDA1581T Fig.3 Application diagram. Decoder for traffic warning (VWF) radio transmissions March 1992 8 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T Fig.4 BK signal voltage at pin 5 as a function of frequency. Fig.5 DK signal voltage at pin 17 as a function of frequency: f0 = 125 Hz; Q ≈ 18. March 1992 9 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T Fig.6 Control characteristic of the SK amplifier at VP = 8.5 V, mBK = 60% and QL = 70. March 1992 10 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T FILTER INFORMATION Gain Amplifier conditions: Go >> Gv and Go >> 2 × Q2 p ---------------------V R1 × C1 G v = – ----------------------------------------------------------------------------------------------------------------------------------- , in which p = jω and G v = -----o2 C1 + C2 R1 + R2 Vi p + p × ------------------------------------- + ----------------------------------------------------------------R3 × C1 × C2 R1 × R2 × R3 × C1 × C2 GENERAL EQUATION C1 = C2 = C C1 = C2 = C R2 << R1 resonance frequency ωr = gain at ω = ωr −Gvr = quality Q= 1 ---------------------------------------------------------------------R1 × R2 ---------------------- × R3 × C1 × C2 R1 + R2 1 ---------------------------------------------R1 × R2 C ---------------------- × R3 R1 + R2 1 ------------------------------C R2 × R3 R3 C2 ---------------------- × -------C1 + C2 R1 1 R3 --- × -------2 R1 1 R3 --- × -------2 R1 1 R3 ( R1 + R2 ) --- -------------------------------------R1 × R2 2 1 R3 --- × -------2 R2 C1 × C2 R3 ( R1 + R2 ) ---------------------- × -------------------------------------C1 + C2 R1 × R2 Recommended components C1, C2 metallized polycarbonate film (MKC) capacitors; ±5% and R1, R2, R3 metal film (MR) resistors; ±2% C1, C2 metallized polyester film (MKT) capacitors; ±5% or and R1, R2, R3 March 1992 carbon film (CR) resistors; ±2% 11 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T PACKAGE OUTLINE SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 D E A X c HE y v M A Z 11 20 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 10 e bp detail X w M 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y mm 2.65 0.30 0.10 2.45 2.25 0.25 0.49 0.36 0.32 0.23 13.0 12.6 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.1 1.0 0.25 0.25 0.1 0.9 0.4 0.012 0.096 0.004 0.089 0.01 0.019 0.013 0.014 0.009 0.51 0.49 0.30 0.29 0.050 0.42 0.39 0.055 0.043 0.016 0.043 0.039 0.01 0.01 0.004 0.035 0.016 inches 0.10 Z (1) θ Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT163-1 075E04 MS-013AC March 1992 EIAJ EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-01-24 12 o 8 0o Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). Reflow soldering Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. Wave soldering Wave soldering techniques can be used for all SO packages if the following conditions are observed: • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. • The longitudinal axis of the package footprint must be parallel to the solder flow. • The package footprint must incorporate solder thieves at the downstream end. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. March 1992 TDA1581T 13 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. March 1992 14