INTEGRATED CIRCUITS DATA SHEET TDA9171 YUV picture improvement processor based on histogram modification and blue stretch Preliminary specification Supersedes data of 1995 Aug 01 File under Integrated Circuits, IC02 1996 Jun 17 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 contrast ratio of the most important parts of the scene will be improved. FEATURES • Picture content dependent non-linear Y and U,V processing by luminance histogram analysis So as to maintain a proper colour reproduction the saturation of the −U and −V colour difference signals are also controlled as a function of the actual non-linearity in the luminance channel. • TV standard independent • Incredible blue stretch • Optional YC-processing. Optionally, the YUV blue stretch circuitry can be activated which offsets colours near white towards blue. GENERAL DESCRIPTION The supply voltage is 8 V. The TDA9171 is a transparent analog video processor with YUV input and output interfaces. The device is contained in a 20 lead dual in-line package. The luminance transfer is controlled in a non-linear way by the distribution, in 5 discrete histogram sections, of the luminance values measured in a picture. As a result, the QUICK REFERENCE DATA SYMBOL VCC PARAMETER MIN. supply voltage 7.2 TYP. − MAX. 8.8 UNIT V ORDERING INFORMATION PACKAGE TYPE NUMBER NAME DESCRIPTION VERSION TDA9171 DIP20 plastic dual in-line package; 20 leads; (300 mil); no heat spreader SOT146-1 1996 Jun 17 2 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 BLOCK DIAGRAM dbook, full pagewidth AMPSEL TAUHM 6 UIN VIN BLM 8 BLG 20 1 19 2 3 SATURATION COMPENSATION BLUE STRETCH NON-LINEAR AMPLIFIER OUTPUT AMPLIFIER UOUT 18 VOUT TDA9171 7 YIN INPUT AMPLIFIER AMPSEL 5 SC TIMING AND CONTROL YOUT AMPSEL HISTOGRAM MEASUREMENT 9 10 11 12 SUPPLY AND BIASING HISTOGRAM PROCESSOR 13 4 16 VCC Fig.1 Block diagram. 3 15 17 VEE NLC HM1 to HM5 1996 Jun 17 14 Vref MBE990 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 PINNING SYMBOL PIN DESCRIPTION BLG 1 blue stretch gain input UIN 2 U colour difference input −UIN VIN 3 V colour difference input −VIN NLC 4 non-linear gain control input BLG 1 20 BLM SC 5 sandcastle input UIN 2 19 UOUT AMPSEL 6 amplitude select input VIN 3 18 VOUT YIN 7 luminance input NLC 4 17 Vref TAUHM 8 time constant histogram input SC 5 HM1 9 histogram segment memory 1 input HM2 10 histogram segment memory 2 input HM3 11 histogram segment memory 3 input HM4 12 HM5 handbook, halfpage 16 VCC TDA9171 AMPSEL 6 15 VEE YIN 7 14 YOUT histogram segment memory 4 input TAUHM 8 13 HM5 13 histogram segment memory 5 input HM1 9 12 HM4 YOUT 14 luminance output HM2 10 11 HM3 VEE 15 ground VCC 16 supply voltage Vref 17 reference voltage output VOUT 18 colour difference output −VOUT UOUT 19 colour difference output −UOUT BLM 20 activation level blue stretch input MBE989 Fig.2 Pin configuration. FUNCTIONAL DESCRIPTION Histogram measurement Input selection and amplification For the luminance signal the histogram distribution is measured in real-time over five segments (HM1 to HM5) in each field. During the period that the luminance is in one segment, a corresponding external capacitor HMx is loaded via a current source. At the end of the field five segment voltages are stored from the external capacitors into on-board memories. The external capacitors are discharged and the measurements are repeated. The dynamic range of the luminance input amplifier is 0.3 or 1 V (excluding sync) typically, depending on the logic level at pin AMPSEL (pin 6). Amplitudes which extend the corresponding specified range will be clipped smoothly, however, the sync is processed to the output transparently. The non-linear gain setting will have minimum effect. Parts in the scene that do not contribute to the information in that scene should be omitted from the histogram measurement. No measurements are performed during the blanking period defined by the sandcastle. Optionally, in the 1 V input mode, the Y output can be attenuated by a factor of 0.7 by means of an intermediate level at pin AMPSEL. This option is meant for correctly interfacing the combed CVBS signal to the video processor in a YC-application. The miscount detector disables measurements until it detects changing parts. Additionally, luminance values close to full scale (or white) do not contribute as well in order to maintain the absolute light output. This procedure is allowed because the eye is less sensitive to detail in white. The input is clamped during the logic HIGH period of the CLP, defined by the sandcastle reference, and should be DC-decoupled with an external capacitor. 1996 Jun 17 4 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch As the miscount detector shortens the effective measurement period and, because of spreads of internal and external components, the current source is controlled in a closed-loop to provide a constant value of the sum of the segment voltages. The dominant time constant of the closed-loop is external and can be tuned with an appropriate capacitor value at pin TAUHM (pin 8). Colour compensation Non-linear luminance processing influences the colour reproduction, mainly the colour saturation. Therefore, the U and V signals are also processed for saturation compensation. By convention −U and −V signals must be supplied to the TDA9171. The −U and −V input signals are clamped during the logic HIGH period of CLP, defined by the sandcastle reference. In YC-applications just one colour difference channel is required for processing the chroma signal. However, external decoupling capacitors should be applied to both inputs UIN and VIN. The external coupling capacitor value should be such that the burst period of the chroma signal is very softly clamped. Processing of the measured histogram value FIELD AVERAGING OF HISTOGRAM VALUES With very rapid picture changes, also related to the field interlace, flicker might result. The histogram values are averaged at the field rate thus reducing the flicker effects. The time constant of the averaging process is adapted to the speed of the histogram changes. The processing is dependent on the amplitude and sign of the colour difference signals whenever the blue stretch circuitry is activated. Therefore, both the polarity and the nominal amplitude of the colour difference signals are relevant when using the blue stretch facility. ADAPTIVE WHITE-POINT STRETCHING For dominant HM4 and HM5 voltages, or large white parts, the histogram conversion procedure makes a transfer with large gain in the white parts, however the amount of light coming out of the scene is considerably reduced. The white stretcher introduces additional overall gain for increased light production and, as a result, violates the principle of having a full scale reference. Blue stretch The blue stretch circuit is intended to shift colours near white, with sufficient contrast values, towards more blue coloured white to give a brighter impression. The chromaticity shift is proportional to the excess of the contrast value of a white video signal with respect to a user adjustable minimum level, defined by a voltage at pin BLM. In this way blue shift in, for instance, human faces can be prevented. The global amount of blue shift is defined by the voltage level at pin BLG. The direction of shift in the colour triangle is fixed by hardware. STANDARD DEVIATION For scenes, in which segments of the histogram distribution are very dominant with respect to the others, the non-linear amplification should be reduced in comparison to scenes with a flat histogram distribution. The standard deviation detector measures the spread of the histogram distribution in the segments HM1 to HM5 and modulates the user setting of the non-linear amplifier. It should be noted that the colour shift is different with a wrong polarity of the colour difference signals. The preferred BLG and BLM settings will be related to the actual nominal amplitudes of the colour difference signals. Non-linear amplifier The stored segment voltages relative to their average value, averaged over two fields, determine the individual gain of each segment in such a way that continuity is guaranteed for the complete range. The maximum and minimum gain of each segment is limited. Apart from the adaptive white-point stretching the black and white references are not affected by the non-linear processing. The amount of linearity can be controlled externally by the NLC pin (Non Linearity Control). 1996 Jun 17 TDA9171 The blue stretch facility must be disabled in YC-applications by setting both BLG and BLM to ground. 5 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134); all voltages referenced to ground. SYMBOL PARAMETER MIN. MAX. UNIT VCC supply voltage −0.5 +8.8 V VI/O supply voltage at any other input or output −0.5 VCC + 0.5 V Tstg storage temperature −55 +150 °C Tamb operating ambient temperature −10 +70 °C HANDLING All pins are protected against ESD by means of internal clamping diodes. The protection circuit meets the following specification: Human body model: C = 100 pF; R = 1.5 kΩ; all pins >3000 V. Machine model: C = 200 pF; R = 0 Ω; all pins >300 V. At an ambient temperature of 90 °C, all pins meet the following specification: Itrigger > 100 mA or Vpin > 1.5 VCC(max) Itrigger < −100 mA or Vpin < −0.5 VCC(max) Except for pins 4, 7, 8 and 17 at positive trigger currents: Pin 4 (NLC): Itrigger > 90 mA or Vpin > 1.5VCC(max) Pin 7 (YIN): Itrigger > 90 mA or Vpin > 1.5VCC(max) Pin 8 (TAUHM): Itrigger > 90 mA or Vpin > 1.5VCC(max) Pin 17 (Vref): Itrigger > 90 mA or Vpin > 1.5VCC(max) QUALITY SPECIFICATION In accordance with SNW-FQ-611 part E. The numbers of the quality specification can be found in the “Quality Reference Handbook”. The handbook can be ordered using the code 9398 510 63011. 1996 Jun 17 6 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 CHARACTERISTICS VCC = 8 V; Tamb = 25 °C; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supplies VCC supply voltage 7.2 − 8.8 V ICC supply current − 35 − mA Vref reference voltage − 5.0 − V Iload load current − − 1 mA − 0.3 0.45 V ViAMPSEL = middle or high − 1.0 1.5 V Luminance input and output selection LUMINANCE INPUT (PIN 7) ViY(es) input voltage (excluding sync) ViAMPSEL = low ViY(cl) input voltage level during clamping − 1.5 − V IY(bias) input bias current − − 0.1 µA LUMINANCE INPUT VOLTAGE RANGE SELECTION (PIN 6) ViAMPSEL(l) input voltage for lower range ViAMPSEL = low − − 0.5 V ViAMPSEL(h) input voltage for higher range ViAMPSEL = high 3.5 5.0 5.5 V ViAMPSEL(m) input voltage for higher range including 0.7 attenuation ViAMPSEL = middle 1.5 − 2.5 V − − 15 µA ViAMPSEL = low − 0.3 − V IAMPSEL(bias) input bias current LUMINANCE OUTPUT (PIN 14) VoY(es) output voltage (excluding sync) ViAMPSEL = high − 1.0 − V VoY(is) output voltage (including sync) ViAMPSEL = middle − 1.0 − V VoY(cl) output voltage level during clamping ViAMPSEL = low − 2.8 − V ViAMPSEL = high − 1.7 − V ViAMPSEL = middle − 2.2 − V − − −52 dB VoN output voltage noise with respect to peak white BY bandwidth minimum NLC gain BY(nl) bandwidth non-linear processing Ebl black level error EG(n) nominal gain error CL 1996 Jun 17 load capacitance 8 10 − MHz 10 − − MHz minimum NLC gain − − 1.0 % minimum NLC gain; ViAMPSEL = low − − 7 % − minimum NLC gain; ViAMPSEL = middle or high − 5 % − − 25 pF fi = 5 MHz 7 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch SYMBOL PARAMETER TDA9171 CONDITIONS MIN. TYP. MAX. UNIT Histogram measurement HISTOGRAM UPDATES AT HMX (PINS 9 TO 13) QHMb segment bleeder accuracy − − 2 % VHM(av) average voltage level for 5 segments − 1.0 − V VHM(min) minimum segment voltage level 0 − − V VHM(max) maximum segment voltage level − 5.0 − V IHMbias input bias current − − 0.1 µA − TIME CONSTANT CONTROL TAUHM (PIN 8) tthmr response speed see Fig.3 − − Qthms static error see Fig.4 − − − Ithm(bias) input bias current − − 0.1 µA Vthm(l) control voltage lower limit − 1.0 − V Vthm(h) control voltage upper limit − 2.0 − V − 4 − % MISCOUNT DETECTION Qmc(d) miscount detection level td(mcp) miscount propagation delay − 25 − ns tmcd(o) miscount detection on-time each event − 0.36 − µs tmcY mismatch propagation delay and luminance delay − − 20 ns Qmc(aW) miscount activation level at white no miscount − 90 − % Qmc(dW) miscount deactivation level at white miscount − 87 − % maximum NLC gain − 1.1 − − − 3 20% step Processing of measured histogram values WHITE POINT STRETCH GWP maximum gain luminance for white stretch (HM pattern = 00113) Non-linear amplifier NON-LINEAR GAIN SET BY HMX (PINS 9 TO 13) Qnl(b) segment bleeder accuracy Gnlc(min) minimum gain segment (HM pattern = 31100) maximum NLC gain − 0.36 − Gnlc(max) maximum gain segment (HM pattern = 31100) maximum NLC gain − 2.28 − see Fig.5 − − − % NON-LINEAR SETTING NLC (PIN 4) Gnlc non-linear control curve ViNLC(l) control voltage lower limit − 0 − V ViNLC(h) control voltage upper limit − 5.0 − V IiNLC(bias) input bias current − − 0.5 µA 1996 Jun 17 8 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch SYMBOL PARAMETER TDA9171 CONDITIONS MIN. TYP. MAX. UNIT Colour difference processing COLOUR DIFFERENCE INPUTS UIN AND VIN (PINS 2 AND 3) ViU(p-p) input voltage (pin 2) (peak-to-peak value) − 1.33 1.8 V ViV(p-p) input voltage (pin 3) (peak-to-peak value) − 1.05 1.8 V IUV(bias) input bias current (pins 2 and 3) − − 0.1 µA ViUV(cl) input voltage level during clamping − 1.5 − V COLOUR DIFFERENCE OUTPUTS UOUT AND VOUT (PINS 19 AND 18) VoU output voltage with respect to pin 2 150 − − % VoV output voltage with respect to pin 3 150 − − % VoUV(cl) output voltage level during clamping − 2.3 − V Eos(UV) offset error minimum BLG and BLM; minimum NLC gain − − 1 % GE(UV) gain error minimum BLG and BLM; minimum NLC gain − − 10 % GM(UV) gain mismatch minimum BLG and BLM; minimum NLC gain − − 5 % BUV bandwidth minimum BLG and BLM; minimum NLC gain 10 − − MHz Blue stretch CHROMATICITY SHIFT ∆VoU variation of U output voltage in white part of 100% colour bar BLM = 4.06 V − −0.375 − V ∆VoV variation of V output voltage in white part of 100% colour bar BLG = 3.25 V − 0.150 − V see Fig.6 BLUE STRETCH ACTIVATION AREA (PIN 20) − − − ViBLM(l) input control voltage lower limit − 0 − V ViBLM(h) input control voltage upper limit − 5.0 − V IBLM(bias) input bias current − − 0.5 µA − − − minimum contrast level range BLUE STRETCH GAIN (PIN 1) GBLG blue stretch gain range ViBLG(l) input voltage lower limit − 0 − V ViBLG(h) input voltage upper limit − 5.0 − V IBLG(bias) input bias current − − 0.5 µA 1996 Jun 17 see Fig.7 9 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch SYMBOL PARAMETER TDA9171 CONDITIONS MIN. TYP. MAX. UNIT Timing SANDCASTLE INPUT (PIN 5) ViSC tSC(sw) input voltage detection level blanking no clamp input sync width 1.0 1.25 1.5 V with clamp 3.5 3.8 4.2 V for no vertical sync − − 15 µs for vertical sync 35 − − µs − −30 − % CLP PULSE WIDTH RESTORATION tCLP(diff) internal CLP pulse width difference Overall output performance TRANSPARENT MODE (NO BLUE STRETCH; NO NON-LINEAR GAIN) td(YUV) delay from input to output of YUV signals minimum BLG and BLM; minimum NLC gain − 50 100 ns td(YUV)m matching of YUV delay minimum BLG and BLM; minimum NLC gain − 10 20 ns MBE997 80 handbook, halfpage tthmr (ms) 60 40 60 Hz 50 Hz 20 0 0 200 400 600 800 1000 CTAUHM (nF) Rmiscount = ratio of effective histogram measuring time and active video in one field defined by the non-blanking periods of the sandcastle signal in one field. Fig.3 1996 Jun 17 Response speed of average histogram amplitude control loop as a function of CTAUHM at both 50 and 60 Hz field rate (Rmiscount = 1; CHMx = 10 nF). 10 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 MBE995 100 handbook, halfpage QTHMS (%) 80 60 40 20 0 0 4 8 12 16 20 Weff = tnonblanking_of_SC x Rmiscount(ms) Rmiscount = ratio of effective histogram measuring time and active video in one field defined by the non-blanking periods of the sandcastle signal in one field. Fig.4 Static error on average histogram amplitude (pin TAUHM) as a function of effective histogram measuring time in a field (CHMx = 10 nF). MBE996 1 handbook, halfpage GNLC 0.75 0.5 0.25 0 1.25 2.25 3.25 4.25 5.25 ViNLC (V) Fig.5 Non-linear amplifier gain as a function of input voltage at pin NLC. 1996 Jun 17 11 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 MBE994 300 handbook, halfpage V (mV) ∆VOUT 0 ∆UOUT −300 −600 −900 1.25 2.05 2.85 3.65 4.45 5.25 ViBLM (V) UIN = VIN = 0; YIN = 100%; ViBLG = 3.25 V. Fig.6 Blue stretch activation area as a function of input voltage at pin BLM. MBE993 300 handbook, halfpage ∆VOUT V (mV) 0 −300 ∆UOUT −600 −900 1.25 2.05 2.85 3.65 4.45 5.25 ViBLG (V) UIN = VIN = 0; YIN = 100%; ViBLM = 4.06 V. Fig.7 Blue stretch gain as a function of input voltage at pin BLG. 1996 Jun 17 12 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 TEST AND APPLICATION INFORMATION The TDA9171 is especially designed for YUV applications. A typical application diagram is shown in Fig.8. Jumpers J1 and J2 can be used to select the appropriate luminance amplitude mode. Potentiometers BLG, BLM and NLC can be used to apply proper blue stretch and non-linear amplifier control voltages. The TDA9171 is also prepared for YC-processing. A typical application diagram is shown in Fig.9. Jumpers J1 and J2 can be used to select the appropriate luminance amplitude mode. Potentiometer NLC can be used to apply the proper non-linear amplifier control voltage. For the chroma processing either the U- or V-channel can be used, however both channels need to be DC-decoupled and the DC-decoupling capacitor value should be such that the burst period of the chroma signal Cin is very softly clamped. The blue stretch circuitry cannot be used in YC-applications and should be switched off by connecting both blue stretch adjustments (BLG and BLG) to ground. handbook, full pagewidth BLG BLM 470 kΩ 470 kΩ 1 20 2 19 UOUT 3 18 VOUT 4 17 10 nF UIN 10 nF VIN 100 nF 470 kΩ 16 SC J1 J2 180 kΩ 220 kΩ 100 nF TDA9171 6 100 nF YIN 15 GND 14 YOUT 7 10 nF 220 nF 8 13 9 12 10 11 10 nF 10 nF 10 nF 10 nF MGD298 Fig.8 YUV application. 1996 Jun 17 VCC 5 13 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 handbook, full pagewidth 1 20 2 19 3 18 4 17 100 nF CIN COUT 100 nF NLC 100 nF 470 kΩ 16 SC J1 J2 180 kΩ 220 kΩ 100 nF TDA9171 6 100 nF YIN 15 GND 14 YOUT 7 10 nF 220 nF 8 13 9 12 10 11 10 nF 10 nF 10 nF 10 nF MBH500 Fig.9 YC application. 1996 Jun 17 VCC 5 14 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 PACKAGE OUTLINE DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1 ME seating plane D A2 A A1 L c e Z b1 w M (e 1) b MH 11 20 pin 1 index E 1 10 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 c mm 4.2 0.51 3.2 1.73 1.30 0.53 0.38 0.36 0.23 26.92 26.54 inches 0.17 0.020 0.13 0.068 0.051 0.021 0.015 0.014 0.009 1.060 1.045 D e e1 L ME MH w Z (1) max. 6.40 6.22 2.54 7.62 3.60 3.05 8.25 7.80 10.0 8.3 0.254 2.0 0.25 0.24 0.10 0.30 0.14 0.12 0.32 0.31 0.39 0.33 0.01 0.078 (1) E (1) Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT146-1 1996 Jun 17 REFERENCES IEC JEDEC EIAJ SC603 15 EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-05-24 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch TDA9171 The total contact time of successive solder waves must not exceed 5 seconds. SOLDERING DIP, SDIP, HDIP, DBS and SIL Introduction The device may be mounted to the seating plane, but the temperature of the plastic body must not exceed the specified storage maximum. If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 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 cases reflow soldering is often used. Repairing soldered joints 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). Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds. Soldering by dip or wave The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the joint for more than 5 seconds. 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. 1996 Jun 17 16 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch NOTES 1996 Jun 17 17 TDA9171 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch NOTES 1996 Jun 17 18 TDA9171 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch NOTES 1996 Jun 17 19 TDA9171 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 805 4455, Fax. +61 2 805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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No. 5, 80640 GÜLTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 2A Akademika Koroleva str., Office 165, 252148 KIEV, Tel. +380 44 476 0297/1642, Fax. +380 44 476 6991 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381, Fax. +1 708 296 8556 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 825 344, Fax.+381 11 635 777 For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 Internet: http://www.semiconductors.philips.com/ps/ (1) ADDRESS CONTENT SOURCE June 17, 1996 © Philips Electronics N.V. 1996 SCA49 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 537021/50/02/pp20 Date of release: 1996 Jun 17 Document order number: 9397 750 00911