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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
FEATURES * Selective subcarrier amplifier (57 kHz) with gain control * 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. GENERAL DESCRIPTION
TDA1581T
The TDA1581T decoder is for radio transmissions having 57 kHz amplitude-modulated subcarriers as used in the german `Verkehrs Warnfunk' (VWF) traffic warning system.
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 VP IP ViSK Zi ViSK Vi(p-p) mBKon mBK tdSKon tdSKoff mDKon mDK tdDKon tdDKoff Tamb supply current nominal input voltage input impedance control level input voltage peak-to-peak value SK switch-on threshold level SK switch hysteresis SK switch-on delay SK switch-off delay DK switch-on threshold level DK switch hysteresis DK switch-on delay DK switch-off delay operating ambient temperature range f = 57 kHz f 57 kHz -3 dB PARAMETER supply voltage range CONDITIONS MIN. 7.5 - - 100 - 2 - - - - - - - - -30 TYP. 8.5 6 8 - 2.4 - 42 3.5 150 750 13 3.6 750 750 - MAX. 10 - - - - - - - - - - - - - +80 UNIT V mA mV k mV V % dB ms ms % dB ms ms C
ORDERING INFORMATION PACKAGE EXTENDED TYPE NUMBER TDA1581T Note 1. SOT163-1; 1996 August 28. PINS 20 PIN POSITION SO MATERIAL plastic CODE SOT163A(1)
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
TDA1581T
March 1992
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Fig.1 Block diagram.
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
PINNING SYMBOL n.c. DKout SKout BK V5BK V6BK VP VP / 2 V9SK n.c. n.c. V12SK VAGC I14 VMPX V16DK V17DK DK I19 GND PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION not connected DK output current SK output current time delay BK filter output BK filter input BK supply voltage half supply voltage SK detector output not connected not connected 57 kHz band pass filter AGC prestage biasing current MPX input filter input DK filter output DK time delay DK reference current for BK, DK detector ground
TDA1581T
Fig.2 Pin configuration.
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
LIMITING VALUES In accordance with the Absolute Maximum System (IEC134). SYMBOL VP = V7-20 V2; 3-20 I2; 3 V15-20 I15 Ptot Tstg Tamb PARAMETER supply voltage switch output voltage switch output current signal input voltage signal input current total power dissipation storage temperature range operating ambient temperature range CONDITIONS pin 7 pins 2 or 3 pins 2 or 3 pin 15 pin 15 - -0.5 -10 -0.5 - - -55 -30 MIN. - - - - - - - - TYP.
TDA1581T
MAX. 15 15 5 VP -10 800 +150 +80
UNIT V V mA V mA mW C 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 VP IP Zi Vi(p-p) ViSK Gv9-15 Gv9-15 Gv Vo9BK Vo9DK BK circuit Vo5BKon V o5BKon --------------------V o5BKoff V4-20off switch-on threshold level switch hysteresis pin 3 high-Z 600 3 670 3.5 750 4 mV dB PARAMETER supply voltage supply current CONDITIONS pin 7 pin 7 f 57 kHz Vo9BK = -3 dB V9BK / V15SK - MIN. 7.5 - 6 - - 2.4(1) 44(1) - - 440 220 TYP. MAX. 10 15 - - - - 2 - - - UNIT V mA
SK amplifier/decoder input impedance input voltage (peak-to-peak value) input voltage at start of gain control voltage gain gain spread gain control range controlled output voltage 60 2 - - - 40 - - k V mV dB dB dB mV mV
BK switch threshold level for BK-off (SK-off) (typ. value = 0.21V8-20) SK output (pin 3) permitted load current saturation voltage rejection voltage
pin 3 conducting
0.8
0.88
0.97
V
I3 V3-20sat V3-20
- I3 = 1.5 mA I3 < 5 A - 18
- - -
0.5 0.35 -
mA V V
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
SYMBOL DK circuit V17DKon V 17DKon --------------------V 17DKoff V18-20off switch-on threshold level switch hysteresis pin 2 high-Z 600 3.1 670 3.6 PARAMETER CONDITIONS MIN. TYP.
TDA1581T
MAX.
UNIT
750 4.1
mV dB
DK switch threshold level for DK-off (Schmitt trigger output) (typ. value = 1 x VBE) DK output (pin 2) permitted load current saturation voltage rejection voltage
pin 2 conducting
-
0.6
-
V
I2 V2-20sat V2-20 Go Gi Ii Vo5-8 V17-8 Io Ro CL V8-20 R8 I8-20 I20-8 I8sc
- I2 = 1.5 mA I2 < 5 A f = 100 Hz - 18
- - - - - - - - 2 -
0.5 0.35 - - - 50 50 - 3.5 50
mA V V
BK and DK filter amplifiers open loop gain current gain input bias current output offset voltage available output current output resistance permitted load capacitance 84 120 - R5-6 = R16-17 = 680 k - 1 - - dB dB nA mV mA k pF
Internal reference voltage output voltage (typ. value = 0.5VP) internal resistance of voltage source available output current output short-circuit current (typ. value = VP / 1 k) reference voltage (typ. value = V8-20 - VBE) internal biasing resistor permitted range of external reference resistor 4.0 - -2 0.6 - 4.25 - - - -8 4.5 5 - - - V mA mA mA
Reference current source V19-20 Ri19 R19-20 Note 1. selectable by R14-8 or Z12-8. - - 180 3.6 5 - - - 270 V k k
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
APPLICATION INFORMATION (see Fig.3) SYMBOL ViSKon mBKon m BKon ---------------m BKoff tdSKon tdSKoff ViDKon mDKon m DKon ----------------m DKoff tdDKon tdDKoff PARAMETER SK switch-on threshold level SK switch-on threshold level SK switch hysteresis CONDITIONS mBK = 60 % ViSK = 8 mV - - 3.0 MIN. TYP. 1.8 32 3.5
TDA1581T
MAX. - - 4.0
UNIT mV % dB
SK switch-on delay SK switch-off delay DK switch-on threshold level DK switch-on threshold level DK switch hysteresis
note 1 note 2 mDK = 30 % ViDK = 8 mV
- 380 - - 3.1
95 500 1.5 13 3.6
200 700 - - 4.1
ms ms mV % dB
DK switch-on delay DK switch-off delay
note 1 note 2
- 600
750 750
1000 1000
ms ms
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).
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
TDA1581T
March 1992
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Fig.3 Application diagram.
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.
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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.
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
FILTER INFORMATION Gain Amplifier conditions: Go >> Gv and Go >> 2 x Q2 p --------------------Vo R1 x C1 G v = - ----------------------------------------------------------------------------------------------------------------------------------- , in which p = j and G v = ----2 C1 + C2 R1 + R2 Vi p + p x ------------------------------------ + ----------------------------------------------------------------R3 x C1 x C2 R1 x R2 x R3 x C1 x C2
TDA1581T
GENERAL EQUATION
C1 = C2 = C
C1 = C2 = C R2 << R1
resonance frequency r = gain at = r -Gvr = quality Q=
1 --------------------------------------------------------------------R1 x R2 --------------------- x R3 x C1 x C2 R1 + R2 R3 C2 --------------------- x ------C1 + C2 R1 C1 x C2 R3 ( R1 + R2 ) --------------------- x ------------------------------------C1 + C2 R1 x R2
1 --------------------------------------------R1 x R2 C --------------------- x R3 R1 + R2 1 R3 -- x ------2 R1 1 R3 ( R1 + R2 ) -- ------------------------------------R1 x R2 2
1 -----------------------------C R2 x R3 1 R3 -- x ------2 R1 1 R3 -- x ------2 R2
Recommended components C1, C2 and R1, R2, R3 or C1, C2 and R1, R2, R3 carbon film (CR) resistors; 2% metallized polyester film (MKT) capacitors; 5% metal film (MR) resistors; 2% metallized polycarbonate film (MKC) capacitors; 5%
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
PACKAGE OUTLINE SO20: plastic small outline package; 20 leads; body width 7.5 mm
TDA1581T
SOT163-1
D
E
A X
c y HE vMA
Z 20 11
Q A2 A1 pin 1 index Lp L 1 e bp 10 wM detail X (A 3) A
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 2.65 0.10 A1 0.30 0.10 A2 2.45 2.25 A3 0.25 0.01 bp 0.49 0.36 c 0.32 0.23 D (1) 13.0 12.6 0.51 0.49 E (1) 7.6 7.4 0.30 0.29 e 1.27 0.050 HE 10.65 10.00 0.42 0.39 L 1.4 0.055 Lp 1.1 0.4 0.043 0.016 Q 1.1 1.0 0.043 0.039 v 0.25 0.01 w 0.25 0.01 y 0.1 0.004 Z
(1)
0.9 0.4 0.035 0.016
0.012 0.096 0.004 0.089
0.019 0.013 0.014 0.009
8 0o
o
Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION SOT163-1 REFERENCES IEC 075E04 JEDEC MS-013AC EIAJ EUROPEAN PROJECTION
ISSUE DATE 92-11-17 95-01-24
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
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. 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.
TDA1581T
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. 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.
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Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio transmissions
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDA1581T
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
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.
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