semiconductor technical data automotive wash wiper timer p suffix plastic package case 626 8 1 18 7 6 5 2 3 4 int osc2 osc1 out pin connections order this document by MC33197A/d (top view) d suffix plastic package case 751 (so8) 8 1 18 7 6 5 2 3 4 osc1 cont w/w osc2 (top view) cont gnd v cc w/w v cc gnd out int (so8) 1 motorola analog ic device data
the MC33197A is a standard wiper timer control device designed for harsh automotive applications. the device can perform the intermittent, after wash, and continuous wiper timer functions. it is designed to directly drive a wiper motor relay. the MC33197A requires very few external components for full system implementation. the intermittent control pin can be switched to ground or v bat to meet a large variety of possible applications. the intermittent timing can be fixed or adjustable via an external resistor. the MC33197A is built using bipolar technology and parametrically specified over the automotive ambient temperature range and 8.0 to 16 v supply voltage. the MC33197A can operate in both front and rear wiper applications. ? adjustable time interval of less than 500 ms to more than 30 s ? intermittent control pin can be switched to ground or v bat ? adjustable after wipe time ? priority to continuous wipe ? minimum number of timing components ? integrated relay driver with free wheeling protection diode ? operating voltage range from 8.0 to 16 v ? for front wiper and rear wiper window applications ordering information device operating temperature range package MC33197Ad t a = 40 to +105 c so8 MC33197Ap t a = 40 to +125 c dip8 maximum ratings rating symbol value unit continuous supply voltage (v pin 6 ) v cc 16 v storage temperature t stg 55 to +150 c thermal resistance (junctiontoambient) r q ja c/w dip8 package 100 so8 package 145 operating ambient temperature range t a c dip8 package 40 to +125 so8 package 40 to +105 operating junction temperature range t j 40 to +150 c maximum junction temperature t j(max) 150 c note: esd data available upon request. this document contains information on a new product. specifications and information herein are subject to change without notice. ? motorola, inc. 1996 rev 0 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 2 motorola analog ic device data representative block diagram this device contains 390 active transistors. r4 r5 osc1 osc2 int logic ref ref ref input comparator with hysteresis input comparator variable current sources out w/w cont gnd c2 r2 r3 r1 c1 MC33197A r1 = 220 w r2 = 22 k w r3 = 1.5 to 22 k w r4 = 4.7 k w r5 = 4.7 k w c1 = 47 m f c2 = 100 nf water pump motor cont switch gnd int v m wiper motor relay switch bb v bb v cc v bb electrical characteristics ( 40 c t a +125 c, 8.0 v v cc 16 v, unless otherwise noted. typical values reflect approximate mean at t a = 25 c with v cc = 14 v at the time of initial device characteri zation.) characteristic symbol min typ max unit functional supply voltage range v ccf 8.0 18 v operating supply voltage range v ccop 8.0 16 v standby supply current (v cc = 16 v, r2 = 68 k) i cc 4.0 5.2 ma supply current int active (r3 = 2.5 k) i cc 7.0 8.4 ma supply current relay aono (r2 = 68 k) i cc 7.5 11.2 ma supply current int and relay aono (r2 = 68 k, r3 = 2.5 k) i cc 10 14.5 ma oscillator variations with supply voltage and temperature (excluding external component tolerances, c2 = 100 nf polyester capacitor) (notes 1 & 2) k osc % 10 v v bb 16 v 10 8.0 v v bb 16 v 15 relay resistance r l 60 w output voltage (i out = 200 ma) v out 0.9 1.5 v output clamp voltage (i out = 20 ma) v cl 19.5 22 v oscillator period coefficient (t a = 25 c) v bb = 13 v (note 3) t b1 0.98 1.0 1.03 v bb = 13 v (int connected to gnd) (note 4) t b2g 15.1 15.5 15.9 v bb = 13 v (int connected to v bat , r1 = 220 w ) (note 4) t b2v 11.5 12.1 12.7 cont threshold (v cc = 13 v) v ih 6.0 8.5 v cont threshold (v cc = 16 v) v ih v cc /2 v notes: 1. the oscillator frequency is defined by the current flowing through the external resistor r2. the voltage at the int pin is (v cc /2 v be ) and hence the current flowing through r3 is different if r3 is connected to v bb or to gnd because of the voltage drop across resistor r1. this voltage drop causes the oscillator coefficient for t b2 to be different for the two cases of int terminated to gnd or to v bb . because of this, the oscillator coefficient is speci fied with a specific value of r1 whenever int is connected to v bb . if r1 is changed, the coefficient will change. also, any extra current through the resistor r1 other than the current used by the device will cause timing deviations in t b2 timings (as in the case where two devices are sharing a common r1 resistor). 2. the oscillator stability with temperature is dependent on the temperature coefficients of the external components. if the capacitance value of the external capacitor varies more than 5% over the parametric temperature range, the figures quoted for oscillator variation are not valid. 3. the t b1 duration is given by coefficient 4 x r2 x c2 (t b1 duration = t b1 x 4 x r2 x c2). 4. the t b2 duration is given by coefficient x r3 x c2 (t b2 duration = t b2 x r3 x c2). f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 3 motorola analog ic device data figure 1. intermittent wash wiper typical application int out gnd v c2 r2 r3 r1 c1 m m w/w r4 osc2 osc1 + battery line water pump wiper motor wash wipe switch low speed high speed MC33197A low speed high speed intermittent washer this application shows the MC33197A with the external wirings and two speed wiper motor. this application has the intermittent and wash wiper functions. v bb cc introduction the MC33197A is a wiper timer control device designed for use in harsh automotive applications. the device can perform the intermittent, after wash, and continuous wiper timer functions. the MC33197A is designed to directly drive a wiper motor relay. the MC33197A is suitable for both front and rear wiper applications. the MC33197A connects directly to the vehicle's battery voltage (v bat ) through a 220 w resistor used with a 47 m f decoupling filter capacitor. the device has an internal oscillator controlled by one of two external resistors (r2 and r3) in addition to one external capacitor (c2), dependent on the application function required. the values of c2 and r2 determine the t b1 time base. t b1 is used to generate the relay wiper activation during the int function (t3) and the after wash timing (t2) during the wash wipe mode. the values c2 and r3 determine the t b2 time base. the t b2 time base is used to generate the pause or intermittent time (t4). the intermittent wiper function can generate intermittent timing (t4) from less than 500 ms to more than 30 seconds. the intermittent function of the device can be activated by the int input connected to either ground or v bat . the intermittent timing is externally adjustable by changing the value of resistor r3. the wash wiper timer function detects the water pump motor's operation. when the pump motor activation is detected, the MC33197A turns the wiper on for the entire duration of the pump motor's activation. when the motor is turned off, it generates an after wash timing (t2) to maintain the wiping action. the w/w pin is connected to the water pump motor through a protection resistor (r4). the MC33197A also has a continuous function, which activates the wiper relay whenever the cont input is activated. the cont input is connected to a switch through a protection resistor (r5). the cont input comparator has an input threshold of v bb /2 with hysteresis. the device has internal debounce circuitry, based on the oscillator period. this provides filtering of the intermittent (int) and wash wipe (w/w) input signals (see t1 debounce timing paragraph that follows). the device directly drives the wiper motor relay. it internally incorporates a 20 v free wheeling zener diode to protect the device against overvoltage spikes produced when relay is switched off. intermittent operation conditions: ? w/w not connected or connected to ground. ? cont not connected or connected to ground. ? int connected to v bb or to ground. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 4 motorola analog ic device data in this configuration, the circuit will respond to the switching of int to either v bb or ground after a time t1 (see t1 debounce timing). if int is disconnected before the end of t1; no action will be taken. after a time t1, the output will be switched on for a duration, t3 = 16 x 4 x t b1 and then switched off for a duration, t4 = 144 x 4 x t b2 . this sequence will continue to repeat so long as int is disconnected from v bb or ground for a time duration greater than t1. if int is disconnected during the time t3; the output will remain on for the remainder of t3. this is illustrated in the diagram on figure 2. figure 2. switching waveform int timing int out t1 t4 t3 wash wipe operation conditions: ? int disconnected. ? cont disconnected or connected to ground. in this condition, the circuit will respond to the switching of w/w to v bb after a time t1 (see t1 debounce timing). if w/w is disconnected or connected to ground before the end of t1; no action will be taken. after a time t1; the circuit will perform as shown on figure 3. the output will turn on and remain on for the duration of w/w. when w/w becomes inactive, the output will remain on for t2 = 96 x 4 x t b1 . figure 3. switching waveform w/w timing w/w out t1 t2 continuous operation in this condition, the circuit responds to the switching of cont to v bb . if cont is connected to v bb , the output will turn on regardless of the state of any other input and remain on so long as cont is active. this command operates directly on the relay output and does not interfere with any other timing. therefore, the circuit will not be reset to a defined state. wash wiper and intermittent operation if w/w is activated during the time int is also activated, the circuit will respond to w/w after a time t1 (see t1 debounce timing). the output will turn on after t1, and stay on for a time t2 + t3 after w/w is deactivated. following this, normal operation of int will occur. this is shown on figure 4. figure 4. switching waveform w/w and int active int out t1 w/w t4 t2 t3 t3 t1 debounce timing the criteria for an input signal to be detected is that it should be active at two successive negative internal clock edges. the inputs are sampled on the negative edge of the internal clock. if two consecutive samples are the same, the input is detected as being in that state. hence the time t1 from a signal becoming active to the time that the circuit responds can be anytime from 4 x t b1 to 2 x 4 x t b1 (due to synchronizing the input to the oscillator period) when the oscillator is oscillating with a time base of t b1 and 4 x t b2 to 2 x 4 x t b2 , when the oscillator is oscillating with a time base of t b2 . the following table summarizes all t1 debounce timings: condition debounce time int active 4 x t b1 to 2 x 4 x t b1 int inactive 4 x t b1 to 2 x 4 x t b1 w/w active when int inactive 4 x t b1 to 2 x 4 x t b1 w/w active when int active during t3 4 x t b1 to 2 x 4 x t b1 w/w active when int active during t4 4 x t b2 to 2 x 4 x t b2 two MC33197A devices using one decoupling resistor and capacitor two devices may be connected to the power source using a common r1 resistor for protection against overvoltages. if this is done it should be noted that the current flowing through r1 is increased and hence the voltage drop across r1 is increased. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 5 motorola analog ic device data overvoltage protection in reference to the block diagram and typical application, all of the foregoing operational cases require: r1 100 w , c1 47 m f r3 1.0 k w , r4 4.7 k w , r5 4.7 k w the circuit will not operate during the transient conditions. by using the above component values, the circuit will be able to sustain the following overvoltages on v bb without permanent damage: 1. +28 v for 5 minutes 2. 15 v for 5 minutes 3. 16 v cycled off for 1.0 minute 4. +80 v pulse decaying exponentially to 8.0 v in 400 ms repeated 3 times at 1.0 minute intervals. 5. 300 v pulse decaying exponentially to 30 v in 300 ms with a maximum energy of 1.0 joule. 6. 100 v pulse decaying exponentially to 10 v in 2 ms. recommended external component values below are the recommended component values to ensure the device will operate properly, and that all specified parameters will stay within their tolerances. r1 should be greater than 100 w ; recommended value of 220 w . r1 can be up to 500 w , but in this case the t b2v parameter could be out of it's specified value (see electrical characteristics and note 1). also, the minimum operating voltage range should be greater than 8.0 v. the following values should be adhered to: 10 k w r2 68 k w 1.5 k w r3 47 k w r4 4.7 k w r5 4.7 k w c1 47 uf 47 nf c2 470 nf application information the following is an example of timing calculations using the following external components values: r2 = 22 k w , r3 = 2.2 k w , c2 = 100 nf (referring to block diagram and typical application). oscillator time base calculation: t b1 duration = t b1 x 4 x r2 x c2 = 1 x 4 x 27e3 x 100e9 = 10.8 ms t b2 duration_g (int to gnd) = t b2g x r3 x c2 = 15.5 x 2.2e3 x 100e9 = 3.41 ms t b2 duration_v (int to v bb ) = t b2v x r3 x c2 = 12.1 x 2.2e3 x 100e9 = 2.66 ms intermittent timing calculation: t3 = 16 x 4 x t b1 duration = 16 x 4 x 10.8 ms = 691 ms t4 = 144 x 4 x t b2 duration_g = 144 x 4 x 3.41 ms = 1.96 s (int connected to gnd) t4 = 144 x 4 x t b2 duration_v = 144 x 4 x 2.66 ms = 1.53 s (int connected to v bb ) wash wipe timing calculation: t2 = 96 x 4 x t b1 = 96 x 4 x 10.8 ms = 4.15 s t1 debounce time calculation (see t1 debounce timing) when oscillator is oscillating at t b1 : t1 minimum = 4 x t b1 = 4 x 10.8 ms = 43.2 ms t1 maximum = 2 x 4 x t b1 = 2 x 4 x 10.8 ms = 86.4 ms when oscillator is oscillating at t b2: t1 minimum (int connected to gnd, t b2g ) = 4 x t b2 = 4 x 3.41 ms = 13.6 ms t1 maximum (int connected to gnd, t b2g ) = 2 x 4 x t b2 = 2 x 4 x 3.41 ms = 27.3 ms f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 6 motorola analog ic device data p suffix plastic package case 62605 issue k d suffix plastic package case 75105 (so8) issue n outline dimensions notes: 1. dimension l to center of lead when formed parallel. 2. package contour optional (round or square corners). 3. dimensioning and tolerancing per ansi y14.5m, 1982. style 1: pin 1. ac in 2. dc + in 3. dc in 4. ac in 5. ground 6. output 7. auxiliary 8. v cc 14 5 8 f note 2 a b t seating plane h j g d k n c l m m a m 0.13 (0.005) b m t dim min max min max inches millimeters a 9.40 10.16 0.370 0.400 b 6.10 6.60 0.240 0.260 c 3.94 4.45 0.155 0.175 d 0.38 0.51 0.015 0.020 f 1.02 1.78 0.040 0.070 g 2.54 bsc 0.100 bsc h 0.76 1.27 0.030 0.050 j 0.20 0.30 0.008 0.012 k 2.92 3.43 0.115 0.135 l 7.62 bsc 0.300 bsc m 10 10 n 0.76 1.01 0.030 0.040 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. seating plane 14 5 8 c k 4x p a 0.25 (0.010) m tb ss 0.25 (0.010) m b m 8x d r m j x 45 f a b t dim min max min max inches millimeters a 4.80 5.00 0.189 0.196 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 bsc 0.050 bsc j 0.18 0.25 0.007 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019 g f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 7 motorola analog ic device data 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. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso 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 officers, employees, subsidiaries, affiliates, 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/affirmative action employer. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC33197A 8 motorola analog ic device data how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 asi a / p acifi c : m o torol a s e mi c ondu c tor s h .k . l td. ; 8 b t a i p in g i ndu s tria l p a r k , i 5 1 t i n g k o k r oad , t a i po , n. t . , hon g kong . 85226629298 MC33197A/d
? f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
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