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ha16103 fpj/fpk watchdog timer description the ha16103fpj/fpk monolithic voltage control is designed for microcomputer systems. in addition to voltage regulator, it includes watch dog timer function, power on reset function, and output voltage monitor function. it is suitable for battery use microcomputer systems. functions 5 v regulated power supply power on reset pulse generator watch dog timer low voltage inhibit protection features wide operational supply voltage range (v cc = 6 to 40 v) various control signals are generated when microcomputer system runaway occurs. ( nmi signal and stby signal are generated by detecting voltage level, and res signal is generated by monitoring the time after nmi signal is detected) regulated voltage, nmi detecting voltage, stby detecting voltage are adjustable. at low voltage and re-start, the delay time of res signal is adjustable watchdog timer filtering uses the minimum clock input pulse width and maximum cycle detection method ordering information type no. package ha16103fpj fp-20da HA16103FPK fp-20da
ha16103 fpj/fpk 2 pin arrangement p-run gnd nc nc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 nc (top view) rf cf r c r r v oadj v out stby v res nmi c v v nc stbyadj v nmiadj res cont cc
ha16103 fpj/fpk 3 pin functions no. pin name description 1 nc nc pin 2 p-run p-run signal input pin for watchdog timer 3 rf connect resistor rf. frequency bandwidth of the filter circuit depends on rf 4 cf connect resistor cf. frequency bandwidth of the filter circuit depends on cf 5r r connect resistor r r . reset-signal power-on time depends on r r 6c r connect resistor c r . reset-signal power-on time depends on c r 7 gnd ground 8 voadj 5-v reference voltage fine-tuning pin. connect a resistor between this pin and gnd. the value of output voltage is given by v out = {1 + 5.34/(r1 // 2.0)} voadj unit for r1: k w 9v out connect the collector of an external pnp-type transistor. the pin supplies 5-v regulated voltage for internal circuit 10 nc nc pin 11 nc nc pin 12 v cont the external pnp-type transistor? base control pin 13 v cc supply voltage pin. operating supply voltage range is 6.0 to 40 v. 14 c res if the voltage of v out pin declines to less than detection voltage(1) (because of an instant power cut or other cause), nmi signals are generated. if t res ? 0.5?f? res (sec) has passed since then, res signals are generated. if the voltage of v out pin inclines to more than detection voltage(1) (in case of re-start from lvi state), nmi signals are stop. t r ? 0.5?f? res (sec) has passed since then, res signals are stop. connect capacitor c res between this pin and gnd to adjust the res signals delay time(t res , t r ). if delay time is unnecessary, make this pin open (t res = 2 m s typ. t r = 10 m s typ. at open) 15 v nmiadj nmi detection voltage fine-tuning pin. connect a resistor between this pin and v out pin or gnd. the value of output voltage is given by v nmi = {1 + (r2 // 25.5)/(r3 // 10.6)} v nmiadj . unit for r2, r3: k w 16 nmi nmi signal output pin. connect to pin nmi of the microcomputer 17 res res signal output pin. connect to pin res of the microcomputer 18 v stbyadj stby detection voltage tuning pin. connect a resistor between this pin and v out or gnd. the value of output voltage is given by v stby = 1.89 {1 + 21/(7.9 + 8.85 // r4)} v stbyadj unit for r4: k w 19 stby stby signal output pin. connect to pin stby of the microcomputer 20 nc nc pin
ha16103 fpj/fpk 4 block diagram error amplifier comparator for stby starter circuit reference voltage generator delay circuit comparator for res comparator for nmi power on reset and automatic reset circuit band-pass filter circuit watchdog timer 3 r f 4 c 15 5 6 7 gnd 17 c res res v stbyadj 18 16 nmi 14 19 stby v cc 9 12 v cont 13 8 p-run 2 5.34 k 2 k 3.3 k w w v out v oadj w r r c r v nmiadj f v out 3.3 k w 3.3 k w + 1000 pf
ha16103 fpj/fpk 5 functional description stabilized power supply function the stabilized power supply includes the following features: wide range of operating input voltage from 6 v to 40 v to provide stabilized voltages availability of any output current, by simply replacing the external transistor fine adjustment of output voltage figure 1 shows the fine adjustment circuit of the output circuit. select the resistor r1 as shown in equation 1. add a resistor between gnd and voadj to increase the output voltage. ha16103 to micro- computer system c1 100 f v cc v gnd v q1 batt cont v out r 1 vout = (1+ ) voadj equation 1 5.34 r // 2.0 1 (voadj 1.31v) (r 1 : k w ) figure 1 fine adjustment circuit of output voltage 0510 5 4 3 2 1 1 a (ta = 25 c) input voltage v cc (v) output voltage (v) i = 0.1 a out 0.5 a 1 : 1 figure 2 output voltage characteristic
ha16103 fpj/fpk 6 power-on reset function the system contains the power-on reset function required when a microcomputer is turned on. the reset period may be set with external components r r and c r . equation 2 specifies how to determine the reset period (ton) and figure 3 shows the characteristic of the circuit. res ha16103 rc t = 0.46 x c x r x vout(s) equation 2 r : w r r on rr r 200 m 180 m 160 m 140 m 120 m 100 m 80 m 60 m 40 m 20 m 0 resistance r r ( w ) (ta = 25 c) v cc = 12 v c r = 0.22 f c r = 0.1 f c r = 0.047 f 100 k 500 k 200 k power-on time ton (s) figure 3 characteristic of power-on reset circuit
ha16103 fpj/fpk 7 watchdog timer function the system contains a bandpass filter for pulse width detection, which outputs a reset pulse when input pulses are not at the preselected frequency (at either a higher or lower frequency). the rc characteristic of the bandpass filter may be set with external components rf and cf. equation 3 specifies how to determine the minimum pulse width (tmin) for runaway detection of the bandpass filter, and figure 4 shows the characteristic of the filter. ha16103 rf cf tmin = cf x rf x 0.11 (s) equation 3 rf : w 2.0 m 1.8 m 1.6 m 1.4 m 1.2 m 1.0 m 0.8 m 0.6 m 0.4 m 0.2 m resistance rf ( w ) cf = 0.022 f cf = 0.01 f cf = 0.0047 f 100 k 500 k runaway-detection minimum pulse width tmin (s) 200 k (ta = 25 c) p?un pulse duty ratio 50% (fixed) v = 12 v c = 0.1 f r = 180 k cc r r w m figure 4 characteristic of power-on reset circuit
ha16103 fpj/fpk 8 low voltage monitoring function the system contains a circuit to send a control signal to the microcomputer when the output voltage drops. the circuit includes the following features. two-point monitoring of output voltage (v nmi and v stby ) availability of fine adjustment of vth1 (v nmi ) and vth2 (v stby ) output of control signal in standby mode of microcomputer figure 5 shows the timing chart of control signals when the output voltage drops. if the output voltage drops below vth1 (4.60 v), the nmi signal rises to request the microcomputer to issue the nmi interrupt signal. the res signal falls t res seconds after the nmi signal rises. if the output voltage drops further to below vth2 (3.2 v), the stby signal rises to enable the micro-computer to enter standby mode. res stby p-run nmi v o v batt 4.70 v 4.60 v 4.70 v 4.60 v 3.20 v t off power on reset signal automatic reset signal system runaway ton t rh t rl t res t r t res figure 5 timing chart for low voltage monitoring
ha16103 fpj/fpk 9 absolute maximum ratings (ta = 25?) ratings item symbol ha16103fpj HA16103FPK units v cc supply voltage v cc 40 40 v control pin voltage v cont 40 40 v control pin current i cont 20 20 ma v out pin voltage v out 12 12 v power dissipation p t 400* 1 400* 2 mw operating ambient temperature range topr ?0 to +85 ?0 to +125 c storage temperature range tstg ?0 to +125 ?0 to +150 c notes: 1. value under ta 77 c. if ta is greater, 8.3 mw/ c derating occurs. 2. allowable temperature of ic junction part, tj (max), is as shown below. tj (max) = q j-a?c (max)+ta ( q j-a is thermal resistance value during mounting, and pc (max) is the maximum value of ic power dissipation.) therefore, to keep tj (max) 125 c, wiring density and board material must be selected according to the board thermal conductivity ratio shown below. be careful that the value of pc (max) does not exceed that p t . 40 mm board 0.8 t ceramic or 1.5 t epoxy 0.5 12 5 10 20 board thermal conductivity (w/m c) sop20 using paste containing compound sop20 without compound 240 thermal resistance ( c/w) q j? 220 200 180 160 140 120 100 80 glass epoxy board with 10% wiring density glass epoxy board with 30% wiring density ceramic board with 96% alumina coefficient (1) (2) (3) (1) (2) (3)
ha16103 fpj/fpk 10 electrical characteristics (ta = 25?, v cc = 12 v, v out = 5 v) ha16103fpj/fpk item symbol min typ max unit test condition supply current i ccl 8 12 ma v cc = 12 v regulator output voltage v o1 4.80 5.00 5.20 v v cc = 6 to 17.5 v i out = 0.5 a, r 1 = 30 k w v o2 4.70 5.00 5.30 v v cc = 6 to 17.5 v i out = 1 a, r 1 = 30 k w line regulation voline ?0 50 mv v cc = 6 to 17.5 v i out = 1 a, r 1 = 30 k w load regulation voload ?00 100 mv i out = 10 ma to 0.5 a, r 1 = 30 k w ripple rejection r rej 45 75 db vi = 0.5 vrms, fi = 1 khz, r 1 = 30 k w output voltage temperature coefficient d v o / d t 0.6 mv/ cv cc = 12 v, r 1 = 30 k w clock input ??input voltage v il 0.8 v ??input voltage v ih 2.0 v ??input current i il ?20 ?0 m av il = 0 v ??input current i ih 0.3 0.5 ma v ih = 5 v
ha16103 fpj/fpk 11 electrical characteristics (t a = 25?, v cc = 12 v, v out = 5 v) (cont) item symbol min typ max unit test condition nmi output nmi pin ??level voltage v ol1 0.4 v i ol1 = 2 ma nmi pin ??level voltage v oh1 ? o1 (v o2 ) ? nmi function start v out voltage v nmi 0.7 1.4 v stby output stby pin ??level voltage v ol2 0.4 v i ol2 = 2 ma stby pin ??level voltage v oh2 ? o1 (v o2 ) ? stby function start v out voltage v stby 0.7 1.4 v res output res pin ??level voltage v ol3 0.4 v i ol3 = 2 ma res pin ??level voltage v oh3 ? o1 (v o2 ) ? res function start v out voltage v res 0.7 1.4 v power on time t on 25 40 60 ms rf = 180 k w , r r = 180 k w clock off reset time t off 80 130 190 ms cf = 0.01 m f, c r = 0.1 m f reset pulse ??level time t rl 15 20 30 ms rf = 180 k w , r r = 180 k w cf = 0.01 m f, c r = 0.1 m f reset pulse ??level time t rh 37 60 90 ms rf = 180 k w , r r = 180 k w cf = 0.01 m f, c r = 0.1 m f low voltage detection voltage(1) v h1 4.40 4.60 4.80 v protecton detection voltage(1) hysteresis width v hys1 50 100 150 mv detection voltage(2) v h2 2.9 3.2 3.5 v detection voltage(2) hysteresis width v hys2 1.35 1.5 1.65 v reset pulse inhibit t res 200 m sc res = 2200 pf delay time restart t r 200 m sc res = 2200 pf
ha16103 fpj/fpk 12 electrical characteristics (t a = ?0 to 125?, v cc = 12 v, v out = 5 v, r1 = 30 k) (cont) HA16103FPK item symbol min typ max unit test condition supply current i cc1 7 13 ma regulator output voltage v out1 4.80 5.00 5.20 v v cc = 6 to 17.5 v i out = 0.5 a line regulation voline ?0 50 mv v cc = 6 to 17.5 v i out = 0.5 a load regulation voload ?00 100 mv i out = 10 ma to 0.5 a clock input ??input voltage v il 0.4 v ??input voltage v ih 2.4 v ??input current i il ?20 ?0 m av il = 0 v ??input current i ih 0.3 0.6 ma v ih = 5 v nmi output nmi pin ??level voltage v oln 0.5 v i ol1 = 2 ma nmi pin ??level voltage v ohn ? out1 ? stby output stby pin ??level voltage v ols 0.5 v i ol2 = 2 ma stby pin ??level voltage v ohs ? out1 ? res output res pin ??level voltage v olr 0.5 v i ol3 = 2 ma res pin ??level voltage v ohr ? out1 ? power on time t on 25 40 60 ms rf = 180 k w , r r = 180 k w clock off reset time t off 70 130 200 ms cf = 0.01 m f, c r = 0.1 m f reset pulse ??level time t rl 15 20 30 ms rf = 180 k w , r r = 180 k w cf = 0.01 m f, c r = 0.1 m f reset pulse ??level time t rh 30 60 100 ms rf = 180 k w , r r = 180 k w cf = 0.01 m f, c r = 0.1 m f low voltage detection voltage(1) v nmi 4.35 4.60 4.85 v protecton detection voltage(2) v stby 2.80 3.20 3.60 v
ha16103 fpj/fpk 13 test circuit v batt c res 2200 p 180 k 180 k 0.01 0.1 v stbyadj c r r r v nmiadj nmi stby res v cc v cont v out voadj s 1 gnd 100 q1 cf rf p-run c 1 counter ha16103 2sb857d v out r 1 1000 p unit r: c: f w sample connection circuit sample connection circuit between ha16103 and h8/532 (1) v cc v cont v out v oadj v nmiadj nmi stby res v stbyadj c res c r r r c f r f p-run gnd v z2 c 2 r 5 v batt c res 2200 p 180 k 180 k 0.01 0.1 r 4 r 3 r 2 r 1 c 1 100 v z1 ign,sw s 1 q1 q2 q3 v cc nmi stby res gnd ha16103 h8/532 to other microcomputer systems port d 1 1000 p unit r: c: f w
ha16103 fpj/fpk 14 sample connection circuit between ha16103 and h8/532 (2) s1 ign. sw r5 c2 v z2 v z1 q1 r1 r2 c1 100 q2 q3 r4 2200 p 0.1 180 k 0.01 180 k 1000 p gnd clk rf cf r c v res stby nmi vnmiadj v cc vv voadj ha16103 v port gnd h8/532 res stby nmi v cc clk ha16103 gnd res stby nmi port gnd h8/532 res stby v cc nmi 2200 p 0.1 180 k 0.01 180 k 1000 p batt cont out stbyadj rr v out rf cf r c rr r3 c res v stbyadj c res unit r: c: f w
ha16103 fpj/fpk 15 precautions if the ic? ground potential varies suddenly by several volts due to wiring impedance (see figure 6), a false res pulse may be output. the reason for this is that potentials in the res pulse generating circuit change together with the v out -gnd potential. the reference potential of the comparator in figure 7 and the potential of the external capacitor have different impedances as seen from the comparator, causing a momentary inversion. the solution is to stabilize the ground potential. two ways of stabilizing the ic? ground line are: separate the ic? ground line from highcurrent ground lines. increase the capacitance (co) used to smooth the v out output. wiring impedance ha16103pj/fpj co r l sw2 sw1 v ign wiring impedance relay or other load figure 6 typical circuit gnd res vout vcont v cc + c res wiring impedance gnd res vout vcont cc + c res wiring impedance figure 7 res comparator
ha16103 fpj/fpk 16 permissible p-run duty cycle ab duty = b a + b 100 runaway detected at 100% ta = 25 c v = 12 v in t = 25 c v = 12 v r = 30 k a cc 1 w rf = 360 k w rf = 560 k w rf = 180 k w 3 m 2 m 1 m 1000 p 2000 p 3000 p 5000 p 7000 p 10000 p 0 low-voltage reset pulse delay t res (sec) c (f) res 20 k 10 k 5 k 20 40 60 80 100 0 p-run pulse frequency (hz) p-run pulse duty cycle (%) 2 k 1 k 500 200 100 50 20 10 low-voltage inhibit section low-voltage reset pulse delay vs. c res permissible p-run pulse duty cycle vs. p-run pulse frequency
ha16103 fpj/fpk 17 ta = 25 c v = 12 v r = 30 k cc 1 w rf = 360 k w 3 m 2 m 1 m 1000 p 2000 p 3000 p 5000 p 7000 p 10000 p 0 low-voltage reset pulse recovery delay t r (sec) c (f) res rf = 560 k w rf = 180 k w 100 k 200 k 300 k 500 k 0 reset low time t rl (s) resistance r r ( w ) 160 m 140 m 120 m 100 m 80 m 60 m 40 m 20 m power-on and auto-reset section reset low time vs. resistance r r c = 0.22 f r c = 0.047 f r c = 0.1 f r ta = 25 c v = 12 v v = 5 v typ cc out low-voltage inhibit section low-voltage reset pulse recovery delay vs. c res
ha16103 fpj/fpk 18 100 k 200 k 300 k 500 k 0 clock-off time t off (s) c = 0.22 f r 700 m 600 m 500 m 400 m 300 m 200 m 100 m c = 0.1 f resistance r r ( w ) c = 0.047 f r ta = 25 c v = 12 v v = 5 v typ cc out r 10 k 100 k 1 m 0 output voltage v out (v) v out adjustment resistance r 1 ( w ) 5.30 5.20 5.10 5.00 4.90 4.80 4.70 ta = 25 c v = 12 v cc vref section output voltage vs. adjustment resistance power-on and auto-reset section clock-off time vs. resistance r r
ha16103 fpj/fpk 19 c = 0.047 f r 100 k 200 k 300 k 500 k 0 c = 0.22 f r 280 m 260 m 240 m 220 m 200 m 180 m 160 m 140 m 120 m 100 m 80 m 60 m 40 m 20 m c = 0.1 f r ta = 25 c v = 12 v v = 5 v typ cc out reset high time t rh (s) resistance r r ( w ) power-on and auto-reset section reset high time vs. resistance r r
ha16103 fpj/fpk 20 package dimensions hitachi code jedec eiaj mass (reference value) fp-20da conforms 0.31 g unit: mm *dimension including the plating thickness base material dimension *0.42 0.08 0.12 0.15 m 20 10 1 *0.22 0.05 0.80 max 11 12.6 5.5 2.20 max 13 max 0 ?8 0.70 0.20 + 0.20 ?0.30 7.80 1.27 0.10 0.10 1.15 0.40 0.06 0.20 0.04
ha16103 fpj/fpk 21 cautions 1. hitachi neither warrants nor grants licenses of any rights of hitachi? or any third party? patent, copyright, trademark, or other intellectual property rights for information contained in this document. hitachi bears no responsibility for problems that may arise with third party? rights, including intellectual property rights, in connection with use of the information contained in this document. 2. products and product specifications may be subject to change without notice. confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. hitachi makes every attempt to ensure that its products are of high quality and reliability. however, contact hitachi? sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. design your application so that the product is used within the ranges guaranteed by hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail- safes, so that the equipment incorporating hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the hitachi product. 5. this product is not designed to be radiation resistant. 6. no one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from hitachi. 7. contact hitachi? sales office for any questions regarding this document or hitachi semiconductor products. hitachi, ltd. semiconductor & integrated circuits. nippon bldg., 2-6-2, ohte-machi, chiyoda-ku, tokyo 100-0004, japan tel: tokyo (03) 3270-2111 fax: (03) 3270-5109 copyright ? hitachi, ltd., 1998. all rights reserved. printed in japan. hitachi asia pte. ltd. 16 collyer quay #20-00 hitachi tower singapore 049318 tel: 535-2100 fax: 535-1533 url northamerica : http:semiconductor.hitachi.com/ europe : http://www.hitachi-eu.com/hel/ecg asia (singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm asia (taiwan) : http://www.hitachi.com.tw/e/product/sicd_frame.htm asia (hongkong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm japan : http://www.hitachi.co.jp/sicd/indx.htm hitachi asia ltd. taipei branch office 3f, hung kuo building. no.167, tun-hwa north road, taipei (105) tel: <886> (2) 2718-3666 fax: <886> (2) 2718-8180 hitachi asia (hong kong) ltd. group iii (electronic components) 7/f., north tower, world finance centre, harbour city, canton road, tsim sha tsui, kowloon, hong kong tel: <852> (2) 735 9218 fax: <852> (2) 730 0281 telex: 40815 hitec hx hitachi europe ltd. electronic components group. whitebrook park lower cookham road maidenhead berkshire sl6 8ya, united kingdom tel: <44> (1628) 585000 fax: <44> (1628) 778322 hitachi europe gmbh electronic components group dornacher stra b e 3 d-85622 feldkirchen, munich germany tel: <49> (89) 9 9180-0 fax: <49> (89) 9 29 30 00 hitachi semiconductor (america) inc. 179 east tasman drive, san jose,ca 95134 tel: <1> (408) 433-1990 fax: <1>(408) 433-0223 for further information write to:

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