INTEGRATED CIRCUITS DATA SHEET PCA16xx series 32 kHz watch circuits with EEPROM Product specification Supersedes data of 1997 Apr 21 File under Integrated Circuits, IC16 1997 Dec 12 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series FEATURES • Stop function for accurate timing • 32 kHz oscillator, amplitude regulated with excellent frequency stability • Power-on reset for fast testing • High immunity of the oscillator to leakage currents • Various test modes for testing the mechanical parts of the watch and the IC. • Time calibration electrically programmable and reprogrammable (via EEPROM) GENERAL DESCRIPTION • A quartz crystal is the only external component required The PCA16xx series devices are CMOS integrated circuits specially suited for battery-operated, quartz-crystal-controlled wrist-watches, with bipolar stepping motors. • Very low current consumption; typically 170 nA • Detector for silver-oxide or lithium battery voltage levels • Indication for battery end-of-life ORDERING INFORMATION TYPE NUMBER PCA1601U/10 PCA1602T PACKAGE(1) NAME − PMFP8 DESCRIPTION VERSION − chip on foil plastic micro flat package; 8 leads (straight) SOT144-1 PCA1603U/7 − chip with bumps on tape − PCA1604U − chip in tray − PCA1604U/10 − chip on foil − PCA1605U/7 − chip with bumps on tape − PCA1606U/10 − chip on foil − PCA1607U − chip in tray − PCA1608U − chip in tray − PCA1611U − chip in tray − PCA1621U/7 − chip with bumps on tape − PCA1621U/10 − chip on foil − PCA1622U − chip in tray − PCA1623U/7 − chip with bumps on tape − PCA1624U − chip in tray − PCA1625U/7 − chip with bumps on tape − PCA1626U − chip in tray − PCA1627U/7 − chip with bumps on tape − PCA1628U − chip in tray − PCA1629U/7 − chip with bumps on tape − Note 1. Figure 1 and Chapter “Package outline” show details of standard package, available for specified devices and for large orders only. Chapter “Chip dimensions and bonding pad locations” shows exact pad locations for other delivery formats. 1997 Dec 12 2 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series PINNING SYMBOL PIN DESCRIPTION VSS 1 ground (0 V) TEST 2 test output OSC IN 3 oscillator input OSC OUT 4 oscillator output VDD 5 positive supply voltage M1 6 motor 1 output M2 7 motor 2 output RESET 8 reset input VSS 1 TEST 2 8 RESET 7 M2 PCA16xxT OSC IN 3 6 M1 OSC OUT 4 5 V DD MSA973 Fig.1 Pin configuration, PCA16xxT, (PMFP8). FUNCTIONAL DESCRIPTION AND TESTING Customer testing Motor pulse An output frequency of 32 Hz is provided at RESET (pin 8) to be used for exact frequency measurement. Every minute a jitter occurs as a result of time calibration, which occurs 90 to 150 ms after disconnecting the RESET from VDD. The motor pulse width (tP) and the cycle times (tT) are given in Chapter “Available types”. Voltage level detector Connecting the RESET to VDD stops the motor pulses leaving them in a HIGH impedance 3-state condition and a 32 Hz signal without jitter is produced at the TEST pin. A debounce circuit protects accidental stoppages due to mechanical shock to the watch (tDEB = 14.7 to 123.2 ms). The supply voltage is compared with the internal voltage reference VLIT and VEOL every minute. The first voltage level detection is carried out 30 ms after a RESET. Lithium mode Connecting RESET to VSS activates Tests 1 and 2 and disables the time calibration. If a lithium voltage is detected (VDD ≥ VLIT), the circuit will operate in the lithium mode. The motor pulse will be produced with a 75% duty factor. Test 1, VDD > VEOL. Normal function takes place except the voltage detection cycle (tV) is 125 ms and the cycle time tT1 is 31.25 ms. At pin TEST a minute signal is available at 8192 times its normal frequency. Silver-oxide mode If the voltage level detected is between VLIT and VEOL, the circuit will operate in silver-oxide mode. Test 2(2), VDD < VEOL. The voltage detection cycle (tV) is 31.25 ms and the motor pulse period (tT2) = 31.25 ms. Battery end-of-life(1) Test and reset mode are terminated by disconnecting the RESET pin. If the battery end-of-life is detected (VDD ≤ VEOL), the motor pulse will be produced without chopping. To indicate this condition, bursts of 4 pulses are produced every 4 s. Test 3, VDD > 5.1 V. Motor pulses with a time period of tT3 = 31.25 ms and n × 122 µs are produced to check the contents of the EEPROM. At pin TEST the motor pulse period signal (tT) is available at 1024 times its normal frequency. The circuit returns to normal operation when VDD < 2.5 V between two motor pulses. Power-on reset For correct operation of the Power-on reset the rise time of VDD from 0 V to 2.1 V should be less than 0.1 ms. All resettable flip-flops are reset. Additionally the polarity of the first motor pulse is positive: VM1 − VM2 ≥ 0 V. (2) Only applicable for types with the battery end-of-life detector. (1) Only available for types with a 1 s motor pulse. 1997 Dec 12 3 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series 3. VDD is decreased to 2.5 V during a motor pulse to initialize a storing sequence. Time calibration Taking a normal quartz crystal with frequency 32768kHz, frequency deviation (∆f/f) of ±15 × 10−6 and CL = 8.2 pF; the oscillator frequency is offset (by using non-symmetrical internal oscillator input and output capacitances of 10 pF and 15 pF) such that the frequency deviation is positive-only. This positive deviation can then be compensated for to maintain time-keeping accuracy. 4. The first VDD pulse to 5.1 V erases the contents of EEPROM. 5. When the EEPROM is erased a logic 1 is at the TEST pin. 6. VDD is increased to 5.1 V to read the data by pulsing VDD n times to 4.5 V. After the n edge, VDD is decreased to 2.5 V. Once the positive frequency deviation is measured, a corresponding number ‘n’ (see Table 1) is programmed into the device’s EEPROM. This causes n pulses of frequency 8192 Hz to be inhibited every minute of operation, which achieves the required calibration. 7. VDD is increased to 5.1 V to store n bits in the EEPROM. 8. VDD is decreased to 2.5 V to terminate the storing sequence and to return to operating mode. The programming circuit is shown in Fig.2. The required number n is programmed into EEPROM by varying VDD according to the steps shown in Fig.3, which are explained below: 9. VDD is increased to 5.1 V to check writing from the motor pulse period tT3. 10. VDD is decreased to the operation voltage between two motor pulses to return to operating mode. (Decreasing VDD during the motor pulse would restart the programming mode). 1. The positive quartz frequency deviation (∆f/f) is measured, and the corresponding values of n are found according to Table 1. The time calibration can be reprogrammed up to 100 times. 2. VDD is increased to 5.1 V allowing the contents of the EEPROM to be checked from the motor pulse period tT3 at nominal frequency. Table 1 Quartz crystal frequency deviation, n and tT3 FREQUENCY DEVIATION ∆f/f (× 10−6) NUMBER OF PULSES (n) tT3 (ms) 0(1) 0 31.250(2) +2.03 1 31.372 +4.06 2 31.494 . . . SIGNAL GENERATOR V SS . . . . . . +127.89 63 38.936 TEST OSC IN 1 8 2 7 PCA16xx SERIES M2 M 3 6 4 5 32 kHz OSC OUT RESET M1 VDD MSA975 Notes 1. Increments of 2.03 × 10−6/step. Fig.2 Circuit for programming the time calibration. 2. Increments of 122 µs/step. 1997 Dec 12 4 1997 Dec 12 5.1 4.5 5 1 (1) 2 9 10 3 t E = 5 ms 4 ERASURE 5 ∆ V DDP 2 3 6 n (1) Fig.3 VDD for programming. 0.1 ms min. t edge = 1 µs 1 DATA INPUT t S = 5 ms 7 STORING 8 (1) (1) 9 t T3 CHECKING 10 MSA948 32 kHz watch circuits with EEPROM (1) Rise and fall time should be greater than 400 µs/V for immediately correct checking. 0 (VSS) 1.5 2.5 VDD (V) I DD CONTENT CHECKING Philips Semiconductors Product specification PCA16xx series Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series AVAILABLE TYPES Refer to Fig.4 and to Chapters “Ordering information” and “Functional description and testing”. SPECIFICATIONS SHORT TYPE NUMBER DELIVERY FORMAT(1) PERIOD tT (s) 1601 U/10 PULSE WIDTH tP (ms) DRIVE (%) EEPROM BATTERY EOL DETECTION 1 7.8 100 yes no REMARKS 1602 T 1 7.8 75 yes no 1603 U/7 20 7.8 100 yes no 1604 U/10 5 7.8 75 yes no 1605 U/7 5 4.8 75 yes no 1606 U/10 10 6.8 100 yes no 1607 U 5 5.8 100 75 yes no 1.5 V and 2.1 V Lithium 1608 U 5 7.8 100 75 yes no 1.5 V and 2.1 V Lithium 1611 U 1 6.8 75 yes no 1621 U/7 20 4.8 100 yes no 1622 U 1 4.8 100 yes yes 1623 U 20 4.8 75 yes no 1624 U 12 3.9 75 56 yes no 1625 U/7 5 5.8 75 yes no 1626 U 20 5.8 100 yes no 1627 U/7 20 5.8 100 75 yes no 1628 U 20 5.8 75 yes no 1629 U/7 5 6.8 75 yes no Note 1. U = Chip in trays; U/7 = chip with bumps on tape; U/10 = chip on foil. T = SOT144-1. V M1 - M2 tT 2t T tP MSA977 Fig.4 Motor output waveform (normal operation). 1997 Dec 12 6 1.5 V and 2.1 V Lithium 1.5 V and 2.1 V Lithium Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC134). SYMBOL PARAMETER VDD supply voltage VI all input voltages CONDITIONS VSS = 0 V; note 1 MIN. MAX. UNIT −1.8 +6 V VSS VDD V output short-circuit duration indefinite Tamb operating ambient temperature −10 +60 °C Tstg storage temperature −30 +100 °C Note 1. Connecting the battery with reversed polarity does not destroy the circuit, but in this condition a large current flows, which will rapidly discharge the battery. HANDLING Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is advisable to take handling precautions appropriate to handling MOS devices. Advice can be found in “Data Handbook IC16, General, Handling MOS Devices”. CHARACTERISTICS VDD = 1.55 V; VSS = 0 V; fosc = 32.768 kHz; Tamb = 25 °C; crystal: RS = 20 kΩ; C1 = 2 to 3 fF; CL = 8 to 10 pF; C0 = 1 to 3 pF; unless otherwise specified. Immunity against parasitic impedance = 20 MΩ from one pin to an adjacent pin. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply VDD supply voltage Tamb = −10 to +60 °C 1.2 1.5 2.5 V ∆VDD supply voltage variation transient; VDD = 1.2 to 2.5 V − − 0.25 V VDDP supply voltage pulse programming 5.0 5.1 5.2 V ∆VDDP supply voltage pulse variation programming 0.55 0.6 0.65 V IDD1 supply current between motor pulses − 170 260 nA IDD2 supply current between motor pulses; VDD = 2.1 V − 190 300 nA IDD3 supply current stop mode; pin 8 connected to VDD − 180 280 nA IDD4 supply current stop mode; pin 8 connected to VDD; VDD = 2.1 V − 220 360 nA IDD5 supply current VDD = 2.1 V; Tamb = −10 to +60 °C − − 600 nA 1997 Dec 12 7 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM SYMBOL PCA16xx series PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Motor output Vsat saturation voltage Σ (P + N) RL = 2 kΩ; Tamb = −10 to +60 °C − 150 200 mV Rsc short-circuit resistance Σ (P + N) Itransistor < 1 mA − 200 300 Ω tT cycle time note 1 tP pulse width note 2 Oscillator VOSC ST starting voltage Vi(p-p) ≤ 50 mV 1.2 − − V 6 15 − µS − 1 − s − 0.05 × 0.3 × 10−6 10−6 gm transconductance tosc start-up time ∆f/f frequency stability Ci input capacitance 8 10 12 pF Co output capacitance 12 15 18 pF ∆VDD = 100 mV Voltage level detector VLIT threshold voltage lithium mode 1.65 1.80 1.95 V VEOL threshold voltage battery end-of-life 1.27 1.38 1.46 V ∆VVLD hysteresis of threshold − 10 − mV TCVLD temperature coefficient − −1 − mV/K tV voltage detection cycle − 60 − s fo output frequency − 32 − Hz ∆Vo output voltage swing R = 1 MΩ; C = 10 pF 1.4 − − V tedge edge time R = 1 MΩ; C = 10 pF − 1 − µs Iim peak input current note 3 − 320 − nA Ii(av) average input current − 10 − nA Reset input Test mode cycle time for motor pulses in: tT1 test 1 − 125 − ms tT2 test 2 − 31.25 − ms tT3 test 3 tDEB debounce time see Chapter “Available types” RESET = VDD 14.7 − 123.2 ms − 4 − s − tP − ms − 31.25 − ms Battery end-of-life tEOL end-of-life sequence tE1 motor pulse width tE2 time between pulses see “Available types” Notes 1. Cycle time can be changed to one of the following values: 1, 5, 10, 12 or 20 s (see Chapter “Available types”). 2. Pulse width can be varied from 2 ms to 15.7 ms in steps of 1 ms (see Chapter “Available types”). 3. Duty factor is 1 : 32 and RESET = VDD or VSS. 1997 Dec 12 8 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series CHIP DIMENSIONS AND BONDING PAD LOCATIONS y OSC OUT OSC IN TEST V SS PCA16xxU SERIES 1.44 mm 0 0 x VDD M1 M2 RESET 2.02 mm MSA976 Chip area: 2.91 mm2. Bonding pad dimensions: 110 µm × 110 µm. Chip thickness: 200 ±25 µm, with bumps: 270 ±25 µm. Fig.5 Bonding pad locations, PCA16xxU series, 8 terminals. Table 2 Bonding pad locations (dimensions in µm) All x/y coordinates are referenced to the centre of pad (VDD), see Fig.5. PAD x y 1290 1100 TEST 940 1100 OSC IN 481 1100 OSC OUT −102 1100 VDD 0 0 M1 578 0 M2 930 0 VSS RESET chip corner (max. value) 1997 Dec 12 1290 0 −497.5 −170 9 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series APPLICATION INFORMATION 1.55 V V SS TEST 1 8 2 7 PCA16xx SERIES (1) OSC IN OSC OUT RESET M2 M 3 6 4 5 M1 VDD MSA974 (1) Quartz crystal case should be connected to VDD. Stray capacitance and leakage resistance from RESET, M1 or M2 to OSC IN should be less than 0.5 pF or larger than 20 MΩ. Fig.6 Typical application circuit diagram. 1997 Dec 12 10 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series PACKAGE OUTLINE PMFP8: plastic micro flat package; 8 leads (straight) SOT144-1 E D X c m t n HE 8 5 Q2 A2 Q1 pin 1 index L detail X 1 4 e w M b 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A2 b c D (1) E (1) e HE L m max. n max. Q1 Q2 t w mm 0.90 0.70 0.40 0.25 0.19 0.12 3.1 2.9 3.1 2.9 0.80 4.6 4.4 0.75 0.26 0.3 0.40 0.30 0.40 0.30 0.95 0.1 Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ ISSUE DATE 94-01-25 95-01-24 SOT144-1 1997 Dec 12 EUROPEAN PROJECTION 11 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series SOLDERING Wave soldering Introduction Wave soldering techniques can be used for all SO packages if the following conditions are observed: 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 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. 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). 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. Reflow soldering Reflow soldering techniques are suitable for all SO packages. 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. 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. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. 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. 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. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. 1997 Dec 12 12 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series 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. 1997 Dec 12 13 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series NOTES 1997 Dec 12 14 Philips Semiconductors Product specification 32 kHz watch circuits with EEPROM PCA16xx series NOTES 1997 Dec 12 15 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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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 417087/1200/03/pp16 Date of release: 1997 Dec 12 Document order number: 9397 750 03142