INTEGRATED CIRCUITS DATA SHEET TDA8718 8-bit high-speed analog-to-digital converter Product specification Supersedes data of April 1993 File under Integrated Circuits, IC02 Philips Semiconductors June 1994 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 FEATURES GENERAL DESCRIPTION • 8-bit resolution The TDA8718 is an 8-bit analog-to-digital converter (ADC) designed for professional applications. The device converts the analog input signal into 8-bit binary coded digital words at a sampling rate of 600 MHz. It has an effective bandwidth capability up to 150 MHz full-scale sine wave. All digital outputs are ECL compatible. • Sampling rate up to 600 MHz • ECL (100K family) compatible for digital inputs and outputs • Overflow/Underflow output • 50 Ω load drive capability • Low input capacitance (5 pF typ.). APPLICATIONS • High speed analog-to-digital conversion • Industrial instrumentation • Data communication • RF communication. QUICK REFERENCE DATA Measured over full voltage and temperature ranges, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VEEA analog supply voltage −4.2 −4.5 −4.8 V VEED digital supply voltage −4.2 −4.5 −4.8 V Iref resistive ladder current 30 45 60 mA IEEA analog supply current 30 42 54 mA IEED digital supply current 100 120 150 mA IEEO(L) LOW level output supply current RL = 50 Ω 40 70 90 mA IEEO(H) HIGH level output supply current RL = 50 Ω 155 170 185 mA ILE DC integral linearity error − ±0.7 ±1.0 LSB DLE DC differential linearity error − ±0.3 ±0.5 LSB EB effective bits fi = 4.43 MHz; Iref = 45 mA; fclk = 100 MHz − 7.5 − bits fi = 4.43 MHz; Iref = 45 mA; fclk = 100 MHz − 6.5 − bits R = 48 Ω fclk(max) maximum clock frequency 600 − − MHz Ptot total power dissipation − 990 1250 mW ORDERING INFORMATION PACKAGE TYPE NUMBER TDA8718K June 1994 PINS PIN POSITION MATERIAL CODE 28 PLCC28 plastic SOT261-2 2 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 BLOCK DIAGRAM handbook, full pagewidth clock inputs analog negative supply voltage V EEA CLK CLK VEED 9 8 23 28 reference V RM voltage middle reference VRT digital negative supply voltage 2 TDA8718 18 OGND2 CLOCK DRIVER 6 OF 5 voltage TOP output ground overflow output 10 D7 13 D6 8Ω analog voltage input VI INPUT AND OUTPUT LATCHES RESISTOR LADDER 3 32 Ω & 14 D5 15 D4 ECL OUTPUTS ANALOG SIGNAL PROCESSING 8Ω & 16 D3 19 D1 1 21 UF 27 24 AGND DGND analog ground 12 OGND1 Fig.1 Block diagram. June 1994 11 V BB digital ground 3 data outputs 17 D2 DIGITAL DECODING 20 D0 V RB reference voltage BOTTOM MSB MBB854 - 2 LSB underflow output Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 PINNING n.c. 7 not connected CLK 8 clock input CLK 9 complementary clock input D7 10 digital output; bit 7 (MSB) VBB 11 ECL reference voltage handbook, halfpage V RT 5 25 n.c. OF 6 24 DGND n.c. 7 23 V EED OGND1 12 output ground 1 (0 V) D6 13 digital output; bit 6 CLK 8 D5 14 digital output; bit 5 CLK 9 15 digital output; bit 4 D3 16 digital output; bit 3 V BB 11 D2 17 digital output; bit 2 OGND2 18 output ground 2 (0 V) D1 19 digital output; bit 1 D0 20 digital output; bit 0 (LSB) UF 21 underflow digital output n.c. 22 not connected VEED 23 digital supply voltage (−4.5 V) DGND 24 digital ground n.c. 25 not connected n.c. 26 not connected AGND 27 analog ground VEEA 28 analog supply voltage (−4.5 V) 22 n.c. TDA8718 21 UF OGND1 12 D4 D7 10 June 1994 26 n.c. overflow digital output 27 AGND 6 D2 17 OF OGND2 18 reference voltage TOP 28 V EEA not connected 5 D3 16 4 VRT VRB n.c. 1 analog input voltage D4 15 3 V RM VI 2 reference voltage MIDDLE decoupling D5 14 reference voltage BOTTOM 2 n.c. 1 VI VRB VRM 4 DESCRIPTION 3 PIN D6 13 SYMB OL Fig.2 Pin configuration. 4 20 D0 19 D1 MBB850 - 2 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VEEA analog supply voltage (pin 28) −7.0 +0.3 V VEED digital supply voltage (pin 23) −7.0 +0.3 V ∆VEE supply voltage difference between VEEA and VEED −1.00 +1.0 V VI input voltage (pin 3) referenced to AGND VEEA 0 V ∆Vclk(p-p) clock input voltage difference between CLK and CLK pin 8 to pin 9 (peak-to-peak value) referenced to VEED; note 1 − 2.0 V IO output current for each digital output − 30 mA Tstg storage temperature −55 +150 °C Tamb operating ambient temperature 0 +70 °C Tj junction temperature − +150 °C Note 1. The circuit has two clock inputs CLK and CLK. Sampling takes place on the falling edge of the clock input signal; CLK and CLK are two complementary signals. THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient in free air MBB851 0 handbook, halfpage ∆ R th j-a (%) 10 20 30 40 50 0 200 400 600 800 1000 airflow (LFPM) Test conditions: PCB (2.24 × 2.24 × 0.062 inches). LFPM = Linear Foot Per Minute. Fig.3 Average effect of air flow on Rth j-a. June 1994 5 VALUE UNIT 55 K/W Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 CHARACTERISTICS VEEA = −4.2 to −4.8 V; VEED = −4.2 to −4.8 V; VEEA to VEED = −0.1 to +0.1 V; AGND and DGND shorted together; Tamb = 0 to +70 °C; typical values measured at VEEA = −4.5 V, VEED = −4.5 V and Tamb = 25 °C; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply −4.2 −4.5 −4.8 VEEA analog supply voltage (pin 28) V VEED digital supply voltage (pin 23) −4.2 −4.5 −4.8 V IEEA analog supply current (pin 28) 30 42 54 mA IEED digital supply current (pin 23) 100 120 150 mA IEEO(L) LOW level output supply current RL = 50 Ω 40 70 90 mA IEEO(H) HIGH level output supply current RL = 50 Ω 155 170 185 mA 60 mA Reference voltages for the resistor ladder (see Table 1) R = 48 Ω IRT reference current (pin 5) 30 45 VRB reference voltage BOTTOM (pin 1) − 48 Ω × IRT − V VRT reference voltage TOP (pin 5) − 0 − V RLAD resistor ladder − 48 − Ω TCRLAD temperature coefficient of the resistor ladder − 175 − MΩ/K VosB voltage offset BOTTOM note 1 − 8 Ω × IRT − mV VosT voltage offset TOP note 1 − 8 Ω × IRT − mV Inputs CLK INPUT (PIN 8); CLK INPUT (PIN 9) VIL LOW level input voltage − −1.8 − V VIH HIGH level input voltage − −0.8 − V IIL LOW level input current Vclk = −1.8 V − 0 − µA IIH HIGH level input current Vclk = −0.8 V − 120 − µA RI input resistance fclk = 100 MHz − 1.5 − kΩ CI input capacitance fclk = 100 MHz − 3.5 − pF ∆Vclk(p-p) clock input voltage difference between CLK and CLK pin 8 to pin 9 (peak-to-peak value) − 900 − mV ANALOG INPUT (PIN 3); NOTE 2 IIL LOW level input current data output = 00 20 40 80 µA IIH HIGH level input current data output = FF 100 200 400 µA RI input resistance − 10 − kΩ CI input capacitance − 5 − pF June 1994 6 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter SYMBOL PARAMETER TDA8718 CONDITIONS MIN. TYP. MAX. UNIT Outputs (RL = 50 Ω) DIGITAL 100K ECL OUTPUTS (D0 TO D7; OF; UF) VOL LOW level output voltage Tamb = 25 °C − −1770 −1650 mV VOH HIGH level output voltage Tamb = 25 °C −1300 −1150 − mV VECL ECL reference voltage −1550 −1450 −1350 mV IOL LOW level output current 4 6 8 mA IOH HIGH level output current 10 20 25 mA 600 − − MHz fi = 100 MHz − − 750 ps Switching characteristics fclk(max) maximum clock frequency (pins 8 and 9) tr; tf rise and fall times Analog signal processing (fclk = 500 MHz) HARMONICS (FULL SCALE) h1 fundamental harmonics fi = 100 MHz − 0 − dB h2 second harmonics fi = 100 MHz − −54 − dB h3 third harmonics fi = 100 MHz − −50 − dB − ±0.7 ±1.0 LSB Transfer function ILE DC integral linearity error DLE DC differential linearity error − ±0.3 ±0.5 LSB AILE AC integral linearity error note 3 − ±0.9 ±1.5 LSB EB effective bits fi = 4.43 MHz, full scale; Iref = 45 mA; note 4; fclk = 100 MHz; Fig.5 − 7.5 − bits fi = 100 MHz, full scale; Iref = 45 mA; note 4; fclk = 500 MHz; Fig.6 − 6.5 − bits fclk = 500 MHz; fi = 100 MHz; Vi = ±8 LSB at code 128; 50% clock duty cycle − 10−11 − times/ samples BER bit error rate Timing (fclk = 500 MHz; RL = 50 Ω; CL = 5 pF) note 5 tds sampling delay − − 300 ps th output hold time 400 700 − ps td output delay time − 1300 1500 ps June 1994 7 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 Notes to the “Characteristics” 1. Voltage offset BOTTOM (VosB) is the difference between the analog input which produces data outputs equal to 00 and the reference voltage BOTTOM (VRB) at Tamb = 25 °C. Voltage offset TOP (VosT) is the difference between reference voltage TOP (VRT) and the analog input which produces data outputs equal to FF, at Tamb = 25 °C. 2. The analog input is not internally biased. It should be externally biased between VRT and VRB levels. 3. Full-scale sine wave; fi = 4.43 MHz; fclk = 100 MHz. 4. Effective bits are obtained via a Fast Fourier Transform (FFT) treatment taking 4K acquisition points per period. The calculation takes into account all harmonics and noise up to half of the clock frequency (NYQUIST frequency). Conversion to signal-to-noise ratio: S/N = EB × 6.02 + 1.76 dB. 5. TDA8718 can only withstand one or two 100K ECL loads in order to work out timings at the maximum sampling frequency. It is recommended to minimize the printed circuit-board load by implementing the load device as close as possible to the TDA8718. Table 1 Output coding and input voltage (typical values; referenced to AGND. BINARY OUTPUT BITS STEP VI O/UF D5 D4 D3 D2 D1 D0 < −40 Ω × IRT 1 0 0 0 0 0 0 0 −40 Ω × IRT 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 1 . . . . . . . . . . . . . . . . . . . . . . . . . . Underflow 254 . 0 1 1 1 1 1 0 255 −8 Ω × IRT 0 1 1 1 1 1 1 > −8 Ω × IRT 1 1 1 1 1 1 1 Overflow handbook, full pagewidth 50 % CLK sample N sample N + 1 sample N + 2 VI th t ds DATA OF/UF DATA N-2 DATA N-1 DATA N DATA N+1 50 % MSA666 Fig.4 Timing diagram. June 1994 8 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 MBD879 0 handbook, full pagewidth amplitude (dB) 20 40 60 80 100 120 0 6.27 12.5 18.8 25.1 31.3 37.6 43.9 f (MHz) 50.2 Effective bits: 7.53; THD = −54.56 dB. Harmonic levels (dB): 2nd = −77.28; 3rd = −54.76; 4th = −71.43; 5th = −71.85; 6th = −105.50. Fig.5 Fast Fourier Transform (fclk = 100 MHz; fi = 4.43 MHz). MBD880 0 handbook, full pagewidth amplitude (dB) 20 40 60 80 100 120 0 31.2 62.4 93.5 125.0 156.0 187.0 Effective bits: 6.60; THD = −48.60 dB. Harmonic levels (dB): 2nd = −64.81; 3rd = −51.10; 4th = −65.05; 5th = −58.33; 6th = −54.07. Fig.6 Fast Fourier Transform (fclk = 500 MHz; fi = 100 MHz). June 1994 9 218.0 f (MHz) 249.0 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 APPLICATION INFORMATION VRB V RM handbook, full pagewidth 22 nF V EEA 22 nF AGND 22 nF 22 nF VI n.c. n.c. 4 VRT 22 nF OF n.c. 3 2 28 1 27 26 5 25 6 24 7 23 CLK 8 CLK 9 21 10 20 11 19 D7 V BB 22 TDA8718 12 13 OGND1 D6 14 D5 15 D4 16 17 D3 D2 n.c. DGND V EED 22 nF n.c. UF D0 D1 18 OGND2 –2 V MBB852 - 2 Fig.7 Application diagram. June 1994 10 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 PACKAGE OUTLINE 12.57 12.32 handbook, full pagewidth seating plane 11.58 11.43 S 0.53 max 1.27 (24 x) 0.10 S 0.18 M 0.81 max 25 R 1.14 0.64 19 26 18 28 11.58 12.57 11.43 12.32 2.16 max 10.92 9.91 1 A 45 o 12 4 1.22 1.07 5 11 0.51 (3x) max 0.32 max 4.57 max 3.04 max 0.51 min detail A Dimensions in mm. Fig.8 Plastic leaded chip carrier, 28-leads; SOT261-2. June 1994 11 MBC654 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDA8718 applied to the substrate by screen printing, stencilling or pressure-syringe dispensing before device placement. SOLDERING Plastic leaded chip carriers Several techniques exist for reflowing; for example, thermal conduction by heated belt, infrared, and vapour-phase reflow. Dwell times vary between 50 and 300 s according to method. Typical reflow temperatures range from 215 to 250 °C. BY WAVE During placement and before soldering, the component must be fixed with a droplet of adhesive. After curing the adhesive, the component can be soldered. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 min at 45 °C. Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder bath is 10 s, if allowed to cool to less than 150 °C within 6 s. Typical dwell time is 4 s at 250 °C. REPAIRING SOLDERED JOINTS (BY HAND-HELD SOLDERING IRON OR PULSE-HEATED SOLDER TOOL) Fix the component by first soldering two, diagonally opposite, end pins. Apply the heating tool to the flat part of the pin only. Contact time must be limited to 10 s at up to 300 °C. When using proper tools, all other pins can be soldered in one operation within 2 to 5 s at between 270 and 320 °C. (Pulse-heated soldering is not recommended for SO packages.) A modified wave soldering technique is recommended using two solder waves (dual-wave), in which a turbulent wave with high upward pressure is followed by a smooth laminar wave. Using a mildly-activated flux eliminates the need for removal of corrosive residues in most applications. For pulse-heated solder tool (resistance) soldering of VSO packages, solder is applied to the substrate by dipping or by an extra thick tin/lead plating before package placement. BY SOLDER PASTE REFLOW Reflow soldering requires the solder paste (a suspension of fine solder particles, flux and binding agent) to be 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. June 1994 12 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter NOTES June 1994 13 TDA8718 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter NOTES June 1994 14 TDA8718 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter NOTES June 1994 15 TDA8718 Philips Semiconductors – a worldwide company Argentina: IEROD, Av. Juramento 1992 - 14.b, (1428) BUENOS AIRES, Tel. (541)786 7633, Fax. (541)786 9367 Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. (02)805 4455, Fax. (02)805 4466 Austria: Triester Str. 64, A-1101 WIEN, P.O. Box 213, Tel. (01)60 101-1236, Fax. (01)60 101-1211 Belgium: Postbus 90050, 5600 PB EINDHOVEN, The Netherlands, Tel. (31)40 783 749, Fax. (31)40 788 399 Brazil: Rua do Rocio 220 - 5th floor, Suite 51, CEP: 04552-903-SÃO PAULO-SP, Brazil. P.O. Box 7383 (01064-970). Tel. (011)821-2327, Fax. (011)829-1849 Canada: INTEGRATED CIRCUITS: Tel. 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(708)296-8556 DISCRETE SEMICONDUCTORS: 2001 West Blue Heron Blvd., P.O. Box 10330, RIVIERA BEACH, FLORIDA 33404, Tel. (800)447-3762 and (407)881-3200, Fax. (407)881-3300 Uruguay: Coronel Mora 433, MONTEVIDEO, Tel. (02)70-4044, Fax. (02)92 0601 For all other countries apply to: Philips Semiconductors, International Marketing and Sales, Building BAF-1, P.O. Box 218, 5600 MD, EINDHOVEN, The Netherlands, Telex 35000 phtcnl, Fax. +31-40-724825 SCD31 © Philips Electronics N.V. 1994 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 533061/1500/04/pp16 Document order number: Date of release: June 1994 9397 734 40011