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tdf5140a brushless dc motor drive circuit product specification 1999 march 15 integrated circuits
1999 march 15 2 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a features full-wave commutation (using push/pull drivers at the output stages) without position sensors built-in start-up circuitry three push-pull outputs: C 0.8 a output current (typ.) C low saturation voltage C built-in current limiter thermal protection flyback diodes tacho output without extra sensor position pulse stage for phase-locked-loop control transconductance amplifier for an external control transistor. applications vcr laser beam printer fax machine blower automotive. general description the tdf5140a is a bipolar integrated circuit used to drive 3-phase brushless dc motors in full-wave mode. the device is sensorless (saving of 3 hall-sensors) using the back-emf sensing technique to sense the rotor position. quick reference data measured over full voltage and temperature range . notes 1. an unstabilized supply can be used. 2. v vmot = v p ; +amp in = - amp in = 0 v; all outputs i o = 0 ma. ordering information symbol parameter conditions min. typ. max. unit v p supply voltage note 1 4 - 18 v v vmot input voltage to the output driver stages note 2 1.7 - 20 v v do drop-out output voltage i o = 100 ma - 0.93 1.05 v i lim current limiting v vmot = 10 v; r o = 3.9 w 0.7 0.8 1 a extended type number package pins pin position material code tdf5140a 18 dil plastic sot102
1999 march 15 3 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a block diagram fig.1 block diagram mgh313 start-up oscillator trans- conductance amplifier push/pull flyback output driver stage 1 1 mot1 15 amp out 4 vmot 3 mot2 adaptive commutation delay commutation logic timing thermal protection rotation position speed & detector output stage divide by 2 position detector stage d l d h output driver stage 2 16 mot3 output driver stage 3 emf comparators 17 mot0 57 8 pgin gnd2 18 gnd1 v p 6 pg/fg 12 cap-ti cap-cd 2 test 9 cap-dc cap-st 10 11 14 13 + amp in - amp in tdf5140a
1999 march 15 4 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a pinning symbol pin dil18 description mot1 1 driver output 1 test 2 test input/output mot2 3 driver output 2 vmot 4 input voltage for the output driver stages pg in 5 position generator: input from the position detector sensor to the position detector stage (optional); only if an external position coil is used pg/fg 6 position generator/frequency generator: output of the rotation speed and position detector stages (open collector digital output, negative-going edge is valid) gnd2 7 ground supply return for control circuits v p 8 positive supply voltage cap-cd 9 external capacitor connection for adaptive communication delay timing cap-dc 10 external capacitor connection for adaptive communication delay timing copy cap-st 11 external capacitor connection for start-up oscillator cap-ti 12 external capacitor connection for timing +amp in 13 non-inverting input of the transconductance ampli?er - amp in 14 inverting input of the transconductance ampli?er amp out 15 transconductance ampli?er output (open collector) mot3 16 driver output 3 mot0 17 input from the star point of the motor coils gnd1 18 ground (0 v) motor supply return for output stages
1999 march 15 5 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a functional description the tdf5140a offers a sensorless three phase motor drive function. it is unique in its combination of sensorless motor drive and full-wave drive. the tdf5140a offers protected outputs capable of handling high currents and can be used with star or delta connected motors. it can easily be adapted for different motors and applications. the tdf5140a offers the following features: sensorless commutation by using the motor emf. built-in start-up circuit. optimum commutation, independent of motor type or motor loading. built-in flyback diodes. three phase full-wave drive. high output current (0.8 a). outputs protected by current limiting and thermal protection of each output transistor. low current consumption by adaptive base-drive. accurate frequency generator (fg) by using the motor emf. amplifier for external position generator (pg) signal. suitable for use with a wide tolerance, external pg sensor. built-in multiplexer that combines the internal fg and external pg signals on one pin for easy use with a controlling microprocessor. uncommitted operational transconductance amplifier (ota), with a high output current, for use as a control amplifier. fig.2 pin configuration tdf5140a mgh311 1 2 3 4 5 6 7 8 9 mot1 test mot2 vmot pg in pg/fg gnd2 vp cap-cd gnd1 mot0 mot3 amp out -amp in +amp in cap-ti cap-st cap-dc 18 17 16 15 14 13 12 11 10
1999 march 15 6 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a limiting values in accordance with the absolute maximum rating system (iec 134). handling every pin withstands the esd test in accordance with mil-std-883c class 2 . method 3015 (hbm 1500 w , 100 pf) 3 pulses + and 3 pulses - on each pin referenced to ground. symbol parameter conditions min. max. unit v p supply voltage - 18 v v i input voltage; all pins except vmot v i < 18 v - 0.3 v p + 0.5 v v vmot vmot input voltage - 0.5 20 v v o output voltage amp out and pg/fg gnd v p v mot1, mot2 and mot3 - 1v vmot + v dhf v v i input voltage cap-st, cap-ti, cap-cd and cap-dc - 2.5 v t stg storage temperature - 55 +150 c t amb operating ambient temperature - 30 +70 c p tot total power dissipation see fig. 3 -- w v es electrostatic handling see handling - 500 v fig.3 power derating curve (sot102; dil18). p tot (w) 50 3 2 0 0 200 mbd535 50 100 150 t ( c) amb o 2.28 1.05 70 30 2.80
1999 march 15 7 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a characteristics v p = 14.5 v; t amb =25 c; unless otherwise specified. symbol parameter conditions min. typ. max. unit supply v p supply voltage note 1 4 - 18 v i p supply current note 2 - 3.7 5 ma v vmot input voltage to the output driver stages see fig.1 1.7 - 20 v thermal protection t sd local temperature at temperature sensor causing shut-down 130 140 150 c d t reduction in temperature before switch-on after shut-down - t sd - 30 - k mot0; centre tap v i input voltage - 0.5 - v vmot v i i input bias current 0.5 v < v i < v vmot - 1.5 v - 10 - 0 m a v csw comparator switching level note 3 20 30 40 mv d v csw variation in comparator switching levels - 3 0 +3 mv v hys comparator input hysteresis - 75 -m v mot1, mot2 and mot3 v do drop-out output voltage i o = 100 ma - 0.93 1.05 v i o = 500 ma - 1.65 1.80 v d v ol variation in saturation voltage between lower transistors i o = 100 ma -- 180 mv d v oh variation in saturation voltage between upper transistors i o = - 100 ma -- 180 mv i lim current limiting v vmot = 10 v; r o = 6.8 w 0.7 0.8 1 a v dhf diode forward voltage (diode d h )i o = - 500 ma; notes 4 and 5; see fig.1 -- 1.5 v v dlf diode forward voltage (diode d l )i o = 500 ma; notes 4 and 5; see fig.1 - 1.5 -- v i dm peak diode current note 5 -- 1a +amp in and - amp in v i input voltage - 0.3 - v p - 1.7 v differential mode voltage without 'latch-up' -- v p v i b input bias current -- 650 na c i input capacitance - 4 - pf v offset input offset voltage -- 10 mv
1999 march 15 8 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a amp out (open collector) i i output sink current 40 -- ma v sat saturation voltage i i = 40 ma - 1.5 2.1 v v o output voltage - 0.5 - +18 v sr slew rate r l = 330 w ; c l = 50 pf - 60 - ma/ m s g tr transfer gain 0.3 -- s pg in v i input voltage - 0.3 - +5 v i b input bias current -- 650 na r i input resistance 5 - 30 k w v cws comparator switching level 86 - 107 mv v hys comparator input hysteresis - 8 - mv pg/fg (open collector) v ol low level output voltage i o = 1.6 ma -- 0.4 v v oh(max) maximum high level output voltage v p -- v t thl high-to-low transition time c l = 50 pf; r l = 10 k w- 0.5 -m s ratio of pg/fg frequency and commutation frequency - 1 : 2 - d duty factor - 50 - % t pl pulse width low after a pg in pulse 5 7 18 m s cap-st i sink output sink current 1.5 2.0 2.5 m a i source output source current - 2.5 - 2.0 - 1.5 m a v swl low level switching voltage - 0.20 - v v swh high level switching voltage - 2.20 - v cap-ti i sink output sink current - 28 -m a i source output source current 0.05 v < v cap-ti < 0.3 v -- 57 -m a 0.3 v < v cap-ti < 2.2 v -- 5 -m a v swl low level switching voltage - 50 - mv v swm middle level switching voltage - 0.30 - v v swh high level switching voltage - 2.20 - v symbol parameter conditions min. typ. max. unit
1999 march 15 9 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a notes 1. an unstabilized supply can be used. 2. v vmot = v p , all other inputs at 0 v; all outputs at v p ; i o = 0 ma. 3. switching levels with respect to mot1, mot2 and mot3. 4. drivers are in the high-impedance off-state. 5. the outputs are short-circuit protected by limiting the current and the ic temperature. application information cap-cd i sink output sink current 10.6 16.2 22 m a i source output source current - 5.3 - 8.1 - 11 m a i sink /i source ratio of sink to source current 1.85 2.05 2.25 v il low level input voltage 850 875 900 mv v ih high level input voltage 2.3 2.4 2.55 v cap-dc i sink output sink current 10.1 15.5 20.9 m a i source output source current - 20.9 - 15.5 - 10.1 m a i sink /i source ratio of sink to source current 0.9 1.025 1.15 v il low level input voltage 850 875 900 mv v ih high level input voltage 2.3 2.4 2.55 v symbol parameter conditions min. typ. max. unit fig.4 application diagram without use of the operational transconductance amplifier (ota). (1) value selected for 3 hz start-up oscillator frequency. k, full pagewidth mbk985 18 nf 18 nf 220 nf 10 nf gnd1 v p vmot pg/fg pgin (1) value selected for 3 hz start-up oscillator frequency 10 m f 18 17 16 15 14 13 12 10 11 1234567 9 8 tdf5140a (1)
1999 march 15 10 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a introduction (see fig.5) full-wave driving of a three phase motor requires three push-pull output stages. in each of the six possible states two outputs are active, one sourcing (h) and one sinking (l). the third output presents a high impedance (z) to the motor which enables measurement of the motor back-emf in the corresponding motor coil by the emf comparator at each output. the commutation logic is responsible for control of the output transistors and selection of the correct emf comparator. in table 1 the sequence of the six possible states of the outputs has been depicted. table 1 output states. note 1. h = high state; l = low state; z = high impedance off-state. the zero-crossing in the motor emf (detected by the comparator selected by the commutation logic) is used to calculate the correct moment for the next commutation, that is, the change to the next output state. the delay is calculated (depending on the motor loading) by the adaptive commutation delay block. state mot1 (1) mot2 (1) mot3 (1) 1zlh 2hlz 3hzl 4zhl 5lhz 6lzh because of high inductive loading the output stages contain flyback diodes. the output stages are also protected by a current limiting circuit and by thermal protection of the six output transistors. the detected zero-crossings are used to provide speed information. the information has been made available on the pg/fg output pin. this is an open collector output and provides an output signal with a frequency that is half the commutation frequency. a vcr scanner also requires a pg phase sensor. this circuit has an interface for a simple pick-up coil. a multiplexer circuit is also provided to combine the fg and pg signals in time. the system will only function when the emf voltage from the motor is present. therefore, a start oscillator is provided that will generate commutation pulses when no zero-crossings in the motor voltage are available. a timing function is incorporated into the device for internal timing and for timing of the reverse rotation detection. the tdf5140a also contains an uncommitted transconductance amplifier (ota) that can be used as a control amplifier. the output is capable of directly driving an external power transistor. the tdf5140a is designed for systems with low current consumption: use of i 2 l logic, adaptive base drive for the output transistors (patented), possibility of using a pick-up coil without bias current.
1999 march 15 11 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a fig.5 typical application of the tdf5140a as a scanner driver, with use of ota. handbook, full pagewidth mbk986 start-up oscillator 1 15 4 18 3 adaptive commutation delay commutation logic timing thermal protection rotation speed/ detector output stage divide by 2 position detector stage 16 emf comparators 17 75 8 gnd2 gnd1 v p 6 fg to micro- processor 12 2 test 9 10 11 14 13 tdf5140a d d tp tn tn d d tp tn tn d d tp tn tn scanner motor position coil 10 nf 4.7 k w + 5 v 18 nf 18 nf 220 nf from dac 1 m f 120 w 39 k w 47 k w 10 k w 470 w 680 w 47 nf bd434 47 nf + 14 v
1999 march 15 12 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a adjustments the system has been designed in such a way that the tolerances of the application components are not critical. however, the approximate values of the following components must still be determined: the start capacitor; this determines the frequency of the start oscillator. the two capacitors in the adaptive commutation delay circuit; these are important in determining the optimum moment for commutation, depending on the type and loading of the motor. the timing capacitor; this provides the system with its timing signals. t he start capacitor (cap-st) this capacitor determines the frequency of the start oscillator. it is charged and discharged, with a current of 2 m a, from 0.05 to 2.2 v and back to 0.05 v. the time taken to complete one cycle is given by: t start = (2.15 c) s (with c in m f) the start oscillator is reset by a commutation pulse and so is only active when the system is in the start-up mode. a pulse from the start oscillator will cause the outputs to change to the next state (torque in the motor). if the movement of the motor generates enough emf the tdf5140a will run the motor. if the amount of emf generated is insufficient, then the motor will move one step only and will oscillate in its new position. the amplitude of the oscillation must decrease sufficiently before the arrival of the next start pulse, to prevent the pulse arriving during the wrong phase of the oscillation. the oscillation of the motor is given by: where: k t = torque constant (n.m/a) i = current (a) p = number of magnetic pole-pairs j = inertia j (kg.m 2 ) f osc 1 2 p k t i p j ---------------------- - ---------------------------------- - = example: j = 72 10 -6 kg.m 2 , k = 25 10 -3 n.m/a, p = 6 and i = 0.5 a; this gives f osc = 5 hz. if the damping is high then a start frequency of 2 hz can be chosen or t = 500 ms, thus c = 0.5/2 = 0.25 m f, (choose 220 nf). t he adaptive commutation delay (cap-cd and cap-dc) in this circuit capacitor cap-cd is charged during one commutation period, with an interruption of the charging current during the diode pulse. during the next commutation period this capacitor (cap-cd) is discharged at twice the charging current. the charging current is 8.1 m a and the discharging current 16.2 m a; the voltage range is from 0.9 to 2.2 v. the voltage must stay within this range at the lowest commutation frequency of interest, f c1 : (c in nf) if the frequency is lower, then a constant commutation delay after the zero-crossing is generated by the discharge from 2.2 to 0.9 v at 16.2 m a. maximum delay = (0.076 c) ms (with c in nf) example: nominal commutation frequency = 900 hz and the lowest usable frequency = 400 hz, so: (choose 18 nf) the other capacitor, cap-dc, is used to repeat the same delay by charging and discharging with 15.5 m a. the same value can be chosen as for cap-cd. fig.6 illustrates typical voltage waveforms. c 8.1 10 6 C f1.3 ------------------------- - 6231 f c1 ------------ - == cap-cd 6231 400 ------------ - 15.6 ==
1999 march 15 13 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a fig.6 cap-cd and cap-dc typical voltage waveforms in normal running mode. handbook, full pagewidth mgh317 voltage on cap-cd voltage on cap-dc t t he timing capacitor (cap-ti) capacitor cap-ti is used for timing the successive steps within one commutation period; these steps include some internal delays. the most important function is the watchdog time in which the motor emf has to recover from a negative diode-pulse back to a positive emf voltage (or vice versa). a watchdog timer is a guarding function that only becomes active when the expected event does not occur within a predetermined time. the emf usually recovers within a short time if the motor is running normally ( << ms). however, if the motor is motionless or rotating in the reverse direction, then the time can be longer ( >> ms). a watchdog time must be chosen so that it is long enough for a motor without emf (still) and eddy currents that may stretch the voltage in a motor winding; however, it must be short enough to detect reverse rotation. if the watchdog time is made too long, then the motor may run in the wrong direction (with little torque). the capacitor is charged, with a current of 57 m a, from 0.2 to 0.3 v. above this level it is charged, with a current of 5 m a, up to 2.2 v only if the selected motor emf remains in the wrong polarity (watchdog function). at the end, or, if the motor voltage becomes positive, the capacitor is discharged with a current of 28 m a. the watchdog time is the time taken to charge the capacitor, with a current of 5 m a, from 0.3 to 2.2 v. to ensure that the internal delays are covered cap-ti must have a minimum value of 2 nf. for the watchdog function a value for cap-ti of 10 nf is recommended. to ensure a good start-up and commutation, care must be taken that no oscillations occur at the trailing edge of the flyback pulse. snubber networks at the outputs should be critically damped. typical voltage waveforms are illustrated by fig.7.
1999 march 15 14 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a fig.7 typical cap-ti and v mot1 voltage waveforms in normal running mode. if the chosen value of cap-ti is too small oscillations can occur in certain positions of a blocked rotor. if the chosen value is too large, then it is possible that the motor may run in the reverse direction (synchronously with little torque). o k, full pagewidth mgh318 v mot 1 voltage on cap-ti other design aspects there are other design aspects concerning the application of the tdf5140a besides the commutation function. they are: generation of the tacho signal fg a built-in interface for a pg sensor general purpose operational transconductance amplifier (ota) possibilities of motor control reliability. fg signal the fg signal is generated in the tdf5140a by using the zero-crossing of the motor emf from the three motor windings. every zero-crossing in a (star connected) motor winding is used to toggle the fg output signal. the fg frequency is therefore half the commutation frequency. all transitions indicate the detection of a zero-crossing (except for pg). the negative-going edges are called fg pulses because they generate an interrupt in a controlling microprocessor. the accuracy of the fg output signal (jitter) is very good. this accuracy depends on the symmetry of the motor's electromagnetic construction, which also effects the satisfactory functioning of the motor itself. example: a 3-phase motor with 6 magnetic pole-pairs at 1500 rpm and with a full-wave drive has a commutation frequency of 25 6 6 = 900 hz, and generates a tacho signal of 450 hz. pg signal the accuracy of the pg signal in applications such as vcr must be high (phase information). this accuracy is obtained by combining the accurate fg signal with the pg signal by using a wide tolerance external pg sensor. the external pg signal (pg in) is only used as an indicator to select a particular fg pulse. this pulse differs from the other fg pulses in that it has a short low-time of 18 m s after a high-to-low transition. all other fg pulses have a 50% duty factor (see fig.8). for more information also see application note eie/an 93014 .
1999 march 15 15 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a fig.8 timing and the fg and pg in signals. n dbook, full pagewidth mgh319 tolerance on pg in pg in mot3 pg/fg the special pg pulse is derived from the negative-going zero-crossing from the mot3 output (pin 16). the external pg signal (pg in on pin 5) must sense a positive-going voltage ( > 80 mv) within 1.5 to 7.5 commutation periods before the negative-going zero-crossing in mot3 (see fig.8). the voltage requirements of the pg in input are such that an inexpensive pick-up coil can be used as a sensor (see fig.9). example: if p = 6, then one revolution contains 6 6=36 commutations. the tolerance is 6 periods, that is 60 degrees (mechanically) or 6.67 ms at 1500 rpm. if a pg sensor is not used, the pg in input must be grounded, this will result in a 50% duty factor fg signal. mbd696 2.2 k w pg in gnd2 22 nf fig.9 pick-up coil as pg sensor.
1999 march 15 16 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a t he o perational t ransconductance a mplifier (ota) the ota is an uncommitted amplifier with a high output current (40 ma) that can be used as a control amplifier. the common mode input range includes ground (gnd) and rises to v p - 1.7 v. the high sink current enables the ota to drive a power transistor directly in an analog control amplifier. although the gain is not extremely high (0.3 s), care must be taken with the stability of the circuit if the ota is used as a linear amplifier as no frequency compensation has been provided. the convention for the inputs (inverting or not) is the same as for a normal operational amplifier: with a resistor (as load) connected from the output (amp out) to the positive supply, a positive-going voltage is found when the non-inverting input (+amp in) is positive with respect to the inverting input ( - amp in). confusion is possible because a 'plus' input causes less current, and so a positive voltage. m otor c ontrol dc motors can be controlled in an analog manner using the ota. for the control an external transistor is required. the ota can supply the base current for this transistor and act as a control amplifier. r eliability it is necessary to protect high current circuits and the output stages are protected in two ways: current limiting of the 'lower' output transistors. the 'upper' output transistors use the same base current as the conducting 'lower' transistor (+15%). this means that the current to and from the output stages is limited. thermal protection of the six output transistors is achieved by each transistor having a thermal sensor that is active when the transistor is switched on. the transistors are switched off when the local temperature becomes too high. it is possible, that when braking, the motor voltage (via the flyback diodes and the impedance on vmot) may cause higher currents than allowed ( > 0.6 a). these currents must be limited externally.
1999 march 15 17 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a package outlines 8.25 7.80 0.32 max 7.62 9.5 8.3 msa259 18 1 10 9 1.4 max 6.48 6.14 22.00 21.35 3.7 max 4.7 max 0.51 min 3.9 3.4 seating plane 0.254 m 0.53 max 2.54 (8x) 0.85 max fig.10 18-pin dual in-line; plastic (sot102). dimensions in mm.
1999 march 15 18 philips semiconductors product speci?cation brushless dc motor drive circuit tdf5140a soldering plastic dual in-line packages b y dip or wave the maximum permissible temperature of the solder is 260 c; this temperature must not be in contact with the joint for more than 5 s. the total contact time of successive solder waves must not exceed 5 s. the device may be mounted up 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. r epairing soldered joints apply the soldering iron below the seating plane (or not more than 2 mm above it). if its temperature is below 300 c, it must not be in contact for more than 10 s; if between 300 and 400 c, for not more than 5 s.
philips semiconductors product specification tdf5140a brushless dc motor drive circuit yyyy mmm dd 1 definitions short-form specification e the data in a short-form specification is extracted from a full data sheet with the same type number and title. for detailed information see the relevant data sheet or data handbook. limiting values definition e limiting values given are in accordance with the absolute maximum rating system (iec 60134). 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 dev ice at these or at any other conditions above those given in the characteristics sections of the specification is not implied. exposure to limi ting values for extended periods may affect device reliability. application information e applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. disclaimers life support e 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 semiconductors customers using or selling these products for use i n such applications do so at their own risk and agree to fully indemnify philips semiconductors for any damages resulting from such application. right to make changes e philips semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. philips semiconductors ass umes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or m ask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right in fringement, unless otherwise specified. contact information for additional information please visit http://www.semiconductors.philips.com . fax: +31 40 27 24825 for sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com . ? koninklijke philips electronics n.v. 1999 all rights reserved. printed in u.s.a. date of release: 03-99 document order number: 9397 750 08754

data sheet status [1] objective specification preliminary specification product specification product status [2] development qualification production definitions this data sheet contains data from the objective specification for product development. philips semiconductors reserves the right to change the specification in any manner without notice. this data sheet contains data from the preliminary specification. supplementary data will be published at a later date. philips semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. this data sheet contains data from the product specification. philips semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. changes will be communicated according to the customer product/process change notification (cpcn) procedure snw-sq-650a. data sheet status [1] please consult the most recently issued data sheet before initiating or completing a design. [2] the product status of the device(s) described in this data sheet may have changed since this data sheet was published. the l atest information is available on the internet at url http://www.semiconductors.philips.com.

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