1 motorola sensor device data cmos
the MC14578 is an analog building block consisting of a veryhigh input impedance comparator. the voltage follower allows monitoring the noninverting input of the comparator without loading. four enhancementmode mosfets are also included on chip. these fets can be externally configured as opendrain or totempole outputs. the drains have onchip staticprotecting diodes. therefore, the output voltage must be main- tained between v ss and v dd . the chip requires one external component. a 3.9 m w 10% resistor must be connected from the r bias pin to v dd . this circuit is designed to operate in smoke detector systems that comply with ul217 and ul268 specifications. ? applications: pulse shapers linepowered smoke detectors threshold detectors liquid/moisture sensors lowbattery detectors co detector and micro interface ? operating voltage range: 3.5 to 14 v ? operating temperature range: 30 to 70 c ? input current (in + pin): 1 pa @ 25 c (dip only) ? quiescent current: 10 m a @ 25 c ? electrostatic discharge (esd) protection circuitry on all pins order this document by MC14578/d
semiconductor technical data ? motorola, inc. 2000 p suffix plastic dip case 64808 pin assignment 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 comp out in a in b v dd out b in c out c1 nc in + nc buff out ine r bias v ss out c2 ordering information MC14578p plastic dip 1 16 out a logic detail 2 + comp bias ckt + buff comp out 13 buff out 15 in+ 12 in 11 r bias in a in b 3 4 5 6 out a out b 9 8 out c2 out c1 7 in c pin 1 = v dd pin 10 = v ss pins 14, 16 = no connection rev 1 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 . . .
2 motorola sensor device data maximum ratings* (voltages referenced to v ss ) symbol parameter value unit v dd dc supply voltage 0.5 to +14 v v in dc input voltage 0.5 to v dd +0.5 v v out dc output voltage 0.5 to v dd +0.5 v i in dc input current, except in + 10 ma i in dc input current, in + 1.0 ma i out dc output current, per pin 25 ma i dd dc supply current, v dd and v ss pins 50 ma p d power dissipation, per package 500 mw t stg storage temperature 65 to +150 c t l lead temperature (10second soldering) 260 c *maximum ratings are those values beyond which damage to the device may occur. this device contains protection circuitry to guard against damage due to high static voltages or electric fields. however, prec autions must be taken to avoid applications of any voltage higher than maximum rated voltages to this highimpedance circuit. for proper ope ration, v in and v out should be constrained to the range v ss (v in or v out ) v dd . unused inputs must always be tied to an appropriate logic voltage level (e.g., either v ss or v dd ). unused outputs must be left open. 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 . . .
3 motorola sensor device data electrical characteristics (voltages referenced to v ss , r bias = 3.9 m w to v dd , t a = 30 to 70 c unless otherwise indicated) symbol parameter test condition v dd v guaranteed limit unit v dd power supply voltage range e 3.5 to 14.0 v v il maximum lowlevel input voltage, mosfets wired as inverters; i.e., in a tied to in b, out a to out b, out c1 to out c2. v out = 9.0 v, |i out | 1 m a 10.0 2.0 v v ih minimum highlevel input voltage, mosfets wired as inverters; i.e., in a tied to in b, out a to out b, out c1 to out c2. v out = 1.0 v, |i out | 1 m a 10.0 8.0 v v io comparator input offset voltage t a = 25 c, over common mode range 10.0 50 mv t a = 0 to 50 c, over common mode range 3.5 to 14.0 75 v cm comparator common mode voltage range 3.5 to 14.0 0.7 to v dd 1.5 v v ol maximum lowlevel comparator output voltage in +: v in = v ss , in : v in = v dd , i out = 30 m a 10.0 0.5 v v oh minimum highlevel comparator output voltage in +: v in = v dd , in : v in = v ss , i out = 30 m a 10.0 9.5 v v oo buffer amp output offset voltage r load = 10 m w to v dd or v ss , over common mode range e 100 mv v ol maximum lowlevel output voltage, mosfets wired as inverters ; i e in a tied to in b out out c1, out c2: i out = 1.1 ma 10.0 0.5 v wired as inverters i . e ., in a tied to in b , out a to out b, out c1 to out c2. out a, out b: i out = 270 m a 10.0 0.5 v v oh minimum highlevel output voltage, mosfets wired as inverters ; i e in a tied to in b out out c1, out c2: i out = 1.1 ma 10.0 9.5 v wired as inverters i . e ., in a tied to in b , out a to out b, out c1 to out c2. out a, out b: i out = 270 m a 10.0 9.5 v i in maximum input leakage in + (dip only) current t a = 25 c, 40% r.h., v in = v ss or v dd 10.0 1.0 pa in + (dip only) t a = 50 c, v in = v ss or v dd 10.0 6.0 in + (sog), in a, in b, in c, in v in = v ss or v dd 10.0 40 na i oz maximum offstate mosfet leakage current in a, in c: v in = v dd , out a, out c2: v out = v ss or v dd 10.0 100 na in b, in c: v in = v ss , out b, out c1: v out = v ss or v dd 10.0 100 i dd maximum quiescent current t a = 25 c in a, in b, in c: v in = v ss or v dd , |v in + v in | = 100 mv, i out = 0 m a 10.0 10 m a c in maximum input capacitance in + other inputs f = 1 khz e e 5.0 15 pf 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 . . .
4 motorola sensor device data 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 nc in + nc buff out in r bias v ss out c2 out a out b in c out c1 in b in a v dd comp out r2 r1 MC14578 r4 3.9 m note: in + and in have very high input impedance. interconnect to these pins should be as short as possible. figure 1. lowbattery detector v+ d1 r3 v+ v+ v+ r5 6.8 k d2 lowbattery indicator output high = battery low low = battery ok applications information example values near the switchpoint, the comparator output in the circuit of figure 1 may chatter or oscillate. this oscillation appears on the signal labelled output. in some cases, the oscilla- tion in the transition region will not cause problems. for example, an mpu reading output could sample the signal two or three times to ensure a solid level is attained. but, in a low battery detector, this probably is not necessary. to eliminate comparator chatter, hysteresis can be added as shown in figure 2. the circuit of figure 2 requires slightly more operating current than the figure 1 arrangement. r1 r2 r3 nominal trip point 470 k w 1.3 m w 20 k w 4.08 v 820 k w 1.2 m w 39 k w 5.05 v 1.2 m w 1.2 m w 62 k w 6.00 v figure 2. adding hysteresis + r7 2 15 12 r6 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 . . .
5 motorola sensor device data package dimensions case 64808 issue r 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. rounded corners optional. a b f c s h g d j l m 16 pl seating 18 9 16 k plane t m a m 0.25 (0.010) t dim min max min max millimeters inches a 0.740 0.770 18.80 19.55 b 0.250 0.270 6.35 6.85 c 0.145 0.175 3.69 4.44 d 0.015 0.021 0.39 0.53 f 0.040 0.70 1.02 1.77 g 0.100 bsc 2.54 bsc h 0.050 bsc 1.27 bsc j 0.008 0.015 0.21 0.38 k 0.110 0.130 2.80 3.30 l 0.295 0.305 7.50 7.74 m 0 10 0 10 s 0.020 0.040 0.51 1.01 style 1: pin 1. cathode 2. cathode 3. cathode 4. cathode 5. cathode 6. cathode 7. cathode 8. cathode 9. anode 10. anode 11. anode 12. anode 13. anode 14. anode 15. anode 16. anode style 2: pin 1. common drain 2. common drain 3. common drain 4. common drain 5. common drain 6. common drain 7. common drain 8. common drain 9. gate 10. source 11. gate 12. source 13. gate 14. source 15. gate 16. source 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 . . .
6 motorola sensor device data notes 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 . . .
7 motorola sensor device data notes 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 . . .
8 motorola sensor device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, represe ntation 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 applicati ons 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 a re not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications int ended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where perso nal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall ind emnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damag es, 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. motor ola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. mfax is a trademark of motorola, inc. how to reach us: usa/europe/locations not listed : motorola literature distribution; p.o. box 5405, denver, colorado 80217. 13036752140 or 18004412447 japan : motorola japan ltd.; sps, technical information center, 3201, minamiazabu. minatoku, tokyo 1 068573 japan. 81334403569 asia/pacific : motorola semiconductors h.k. ltd.; silicon harbour centre, 2 dai king street, tai po industrial estate, tai po, n.t., hong kong. 85226668334 customer focus center: 18005216274 mfax ? : rmfax0@email.sps.mot.com touchtone 1 6022446609 motorola fax back system us & c anada only 18007741848 http://sps.motorola.com/mfax/ home page : http://motorola.com/sps/ MC14578/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 . . .
|
