device operating temperature range package
semiconductor technical data stepper motor driver ordering information saa1042v SAA1042Av t j = 30 to +125 c plastic dip plastic dip v suffix plastic package case 648c pin connections order this document by saa1042/d (top view) 1 l3 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 gnd l2 full/half step cw/ccw clock set/ driver bias v cc gnd gnd l4 l1 vd vm 16 1 1 motorola analog ic device data
the saa1042 drives a twophase stepper motor in the bipolar mode. the device contains three input stages, a logic section and two output stages. the ic is contained in a 16 pin dualinline heat tab plastic package for improved heatsinking capability. the center four ground pins are connected to the copper alloy heat tab and improve thermal conduction from the die to the circuit board. ? drive stages designed for motors: 6.0 v and 12 v: saa1042v drive stages designed for motors: 6.0 v and 24 v: SAA1042Av ? 500 ma/coil drive capability ? builtin clamp diodes for overvoltage suppression ? wide logic supply voltage range ? accepts commands for cw/ccw and half/full step operation ? inputs compatible with popular logic families: mos, ttl, dtl ? set input defined output state ? drive stage bias adaptable to motor power dissipation for optimum efficiency figure 1. representative block diagram cw/ccw 3 a set full/ half step clock 8 10 7 v cc logic 11 m v z vd 2 15 v m driver 1 l1 l2 driver bias 9 r b gnd 6 16 l3 l4 14 driver ? motorola, inc. 1995 www.datasheet.co.kr datasheet pdf - http://www..net/
saa1042, a 2 motorola analog ic device data maximum ratings (t a = 25 c, unless otherwise noted.) rating symbol saa1042v SAA1042Av unit clamping voltage (pins 1, 3, 14, 16) v clamp 20 30 v over voltage (v ov = v clamp v m ) v ov 6.0 6.0 v supply voltage v cc 20 30 v switching or motor current/coil i m 500 500 ma input voltage (pins 7, 8, 10) v in clock v in full/half v in cw/ ccw v cc v power dissipation (note 1) thermal resistance, junctiontoair thermal resistance, junctiontocase p d q ja q jc 2.0 80 15 w c/w operating junction temperature range t j 30 to +125 c storage temperature range t stg 65 to +150 c note: 1. the power dissipation (p d ) of the circuit is given by the supply voltage (v m and v cc ) and the motor current (i m ), and can be determined from figures 3 and 5. p d = p drive p logic. electrical characteristics (t a = 25 c, unless otherwise noted.) characteristics pin(s) symbol v cc min typ max unit supply current 11 i cc 5.0 v 20 v e e e e 3.5 8.5 ma motor supply current (i pin 6 = 400 m a, pins 1, 3, 14, 16 open) v m = 6.0 v v m = 12 v v m = 24 v 15 i m 5.0 v 5.0 v 5.0 v e e e 25 30 40 e e e ma input voltage, high state 7, 8, 10 v ih 5.0 v 10 v 15 v 20 v 2.0 7.0 10 14 e e e e e e e e v input voltage, low state v il 5.0 v 10 v 15 v 20 v e e e e e e e e 0.8 1.5 2.5 3.5 input reverse current, high state (v in = v cc ) 7, 8, 10 i ir 5.0 v 10 v 15 v 20 v e e e e e e e e 2.0 2.0 3.0 5.0 m a input forward current, low state (v in = gnd) i if 5.0 v 10 v 15 v 20 v 10 25 40 50 e e e e e e e e output voltage, high state (v m = 12 v) i out = 500 ma i out = 50 ma 1, 3, 14, 16 v oh 5.0 20 v e e v m 2.0 v m 1.2 e e v output voltage, low state i out = 500 ma i out = 50 ma v ol 5.0 20 v e e 0.7 0.2 e e output leakage current, pin 6 = open (v m = v d = v clamp max ) 1, 3, 14, 16 i dr 5.0 20 v 100 e e m a clamp diode forward voltage (drop at i m = 500 ma) 2 v f e e 2.5 3.5 v clock frequency 7 f c 5.0 20 v 0 e 50 khz clock pulse width 7 t w 5.0 20 v 10 e e m s set pulse width 6 t s e 10 e e m s set control voltage, high state set control voltage, low state 6 e e v m e e e e 0.5 v www.datasheet.co.kr datasheet pdf - http://www..net/
saa1042, a 3 motorola analog ic device data input / output functions clock e (pin 7) this input is active on the positive edge of the clock pulse and accepts logic `1' input levels dependent on the supply voltage and includes hysteresis for noise immunity. cw / ccw e (pin 10) this input determines the motor 's rotational direction. when the input is held low , (ov, see the electrical characteristics) the motor ' s direction is nominally clockwise (cw). when the input is in the high state, logic `1', the motor direction is nominally counter clockwise (ccw), depending on the motor connections. full / half step e (pin 8) this input determines the angular rotation of the motor for each clock pulse. in the low state, the motor will make a full step for each applied clock pulse, while in the high state, the motor will make half a step. v d e (pin 2) this pin is used to protect the outputs (1, 3,14, 16) where large positive spikes occur due to switching the motor coils. the maximum allowable voltage on these pins is the clamp voltage (v clamp ). motor performance is improved if a zener diode is connected between pin 2 and 15, as shown in figure 1. the following conditions have to be considered when selecting the zener diode: v clamp = v z = v m + 6.0 v v clamp v m v f where: v f = clamp diodes forward voltage drop v f = (see figure 4) v clamp : 20 v for saa1042v 30 v for v clamp : SAA1042Av pins 2 and 15 can be linked, in this case v z = 0 v. the resistor r b adapts the drivers to the motor current. 1) a pulse via the resistor r b sets the outputs (1, 3, 14, 16) to a defined state. 2) set / bias input e (pin 6) this input has two functions: the resistor r b can be determined from the graph of figure 2 according to the motor current and voltage. smaller values of r b will increase the power dissipation of the circuit and larger values of r b may increase the saturation voltage of the driver transistors. when the aseto function is not used, terminal a of the resistor r b must be grounded. when the set function is used, terminal a has to be connected to an opencollector (buffer) circuit. figure 7 shows this configuration. the buf fer circuit (offstate) has to sustain the motor voltage (v m ). when a pulse is applied via the buffer and the bias resistor (r b ), the motor driver transistors are turned of f during the pulse and after the pulse has ended, the outputs will be in defined states. figure 6 shows the timing diagram. figure 7 illustrates a typical application in which the saa1042 drives a 12 v stepper motor with a current consumption of 200 ma/coil. a bias resistor (r b ) of 56 k w is chosen according to figure 2. the maximum voltage permitted at the output pin is v m + 6.0 v (see maximum ratings table), in this application v m = 12 v , therefore the maximum voltage is 18 v . the outputs are protected by the internal diodes and an external zener connected between pins 2 and 15. from figure 4, it can be seen that the voltage drop across the internal diodes is about 1.7 v at 200 ma. this results in a zener voltage between pins 2 and 15 of: v z = 6.0 v 1.7 v = 4.3 v. to allow for production tolerances and a safety margin, a 3.9 v zener has been chosen for this example. the clock is derived from the line frequency which is phaselocked by the mc14046b and the mc14024. the voltage on the clock input is normally low (logic `0'). the motor steps on the positive going transition of the clock pulse. the logic `0' applied to the full/half input (pin 8) operates the motor in full step mode. a logic `1' at this input will result in half step mode. the logic level state on the cw/ccw input (pin 10), and the connection of the motor coils to the outputs determines the rotational direction of the motor. these two inputs should be biased to a logic `0' or `1' and not left floating. in the event of nonuse, they should be tied to ground or the logic supply line, v cc . the output drivers can be set to a fixed operating point by use of the set input and a bias resistor, r b . a positive pulse to this input turns the drivers of f and sets the logic state of the outputs. after the negative going transition of the set pulse, and until the first positive going transition of the clock, the outputs will be: l1 = l3 = high and l2 = l4 = low, (see figure 6). the set input can be driven by a mc14007b or a transistor whose collector resistor is r b . if the input is not used, the bottom of r b must be grounded. the t ota l p owe r d issipation o f t h e c ircui t c a n b e determined from figures 3 and 5: p d = 0.9 w + 0.08 w = 0.98 w. the junction temperature can then be computed using figure 8. www.datasheet.co.kr datasheet pdf - http://www..net/
saa1042, a 4 motorola analog ic device data figure 2. bias resistor r b versus motor current figure 3. drive stage power dissipation 5.0 3.0 motor current/coil (ma) motor current/coil (ma) 0 0 500 4.0 1.0 2.0 0.7 0.5 0.3 0.2 0.1 400 300 200 100 70 50 30 20 20 30 40 50 60 80 100 200 300 400 500 10 20 30 50 70 100 200 300 500 drive st age power dissip ation (w) r b bias resist or (k ) w v m = 24 v v m = 12 v v m = 6.0 v v m = 24 v v m = 12 v v m = 6.0 v figure 4. clamp diode forward current versus forward voltage figure 5. power dissipation versus logic supply voltage v f , forward voltage (v) 0 0 v cc , supply voltage (v) 500 0 5.0 4.0 3.0 1.0 10 20 2.0 400 300 200 100 25 20 15 10 5.0 500 300 200 100 70 30 50 p forward current (ma) d , power dissip ation (mv) figure 6. timing diagram don't care full step motor drive mode. full/half step input = 0 high output impedance clock clock half step motor drive mode. full/half step input = 1 set cw/ccw l1 l2 l3 l4 set cw/ccw l1 l2 l3 l4 www.datasheet.co.kr datasheet pdf - http://www..net/
saa1042, a 5 motorola analog ic device data figure 7. typical application selectable step rates with the time base derived from the line frequency 220 k set input r b 56 k steps/sec 3 5 1 0.1 m f 50 hz 220 v 15 14 phase comp mc14046b 16 12 v vco 7 6 11 9 2 82 k 8.2 m f 4.7 nf 120 k f 0 = 1400 hz 12.5 25 50 100 200 400 800 1 2 7 12 5 9 6 11 4 3 14 5 3 set mc14007 v z = 3.9 v 12 v 12 v cw ccw full half clock 12 v 8 7 10 9 6 14 16 1 3 2 15 11 m mc14024 saa1042 l l figure 8. thermal resistance and maximum power dissipation versus p.c.b. copper length p d(max) for t a = 70 c r q ja 3.0 mm 1.0 0 2.0 oz copper 2.0 10 20 30 40 50 graph represents symmetrical layout printed circuit board heatsink example 0 3.0 4.0 5.0 l, length of copper (mm) 100 80 60 40 20 0 r q ja , thermal resist ance p d(max) , maximum power dissip ation (w) junctiontoair ( c/w) www.datasheet.co.kr datasheet pdf - http://www..net/
saa1042, a 6 motorola analog ic device data v suffix plastic package case 648c03 issue c outline dimensions dim min max min max millimeters inches a 0.740 0.840 18.80 21.34 b 0.240 0.260 6.10 6.60 c 0.145 0.185 3.69 4.69 d 0.015 0.021 0.38 0.53 e 0.050 bsc 1.27 bsc f 0.040 0.70 1.02 1.78 g 0.100 bsc 2.54 bsc j 0.008 0.015 0.20 0.38 k 0.115 0.135 2.92 3.43 l 0.300 bsc 7.62 bsc m 0 10 0 10 n 0.015 0.040 0.39 1.01 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of leads when formed parallel. 4. dimension b does not include mold flash. 5. internal lead connection between 4 and 5, 12 and 13. a b 16 9 1 8 f d g e n c note 5 16 pl s a m 0.13 (0.005) t t seating plane s b m 0.13 (0.005) t j 16 pl m l motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability , including without limitation consequential or incidental damages. at ypicalo parameters can and do vary in dif ferent applications. all operating parameters, including at ypicalso must be validated for each customer application by customer ' s technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur . should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly , any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/af firmative action employer . how to reach us: usa / europe : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, toshikatsu otsuki, p.o. box 20912; phoenix, arizona 85036. 18004412447 6f seibubutsuryucenter, 3142 tatsumi kotoku, tokyo 135, japan. 0335218315 mfax : rmf ax0@email.sps.mot.com t ouchtone (602) 2446609 hong kong : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok road, tai po, n.t., hong kong. 85226629298 saa1042/d ? www.datasheet.co.kr datasheet pdf - http://www..net/
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