LC7730

LC7730 SANYO | Alldatasheet

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No, 2644 LC7730;7730M SANYO Timer Overview: The LC7730s are the stable long-running timers that consists of a CR oscillator and multi-stage counters. If a 4.66kHz clock is used as a standard clock input, they can be used as an hour-long timer. Features: ~ Elapsed time display function - Two operation modes - 15V withstand voltage open drain output for switching output (NPN and PNP type transistors directly drivable by the INV input selection) ~ Various timer values can be set by changing the oscillator CR value properly {from 10 minutes to several hours). Applications: - Sleep timer for radios and radio cassette players - Battery charger timer - Ultra-low frequency signal generator voo OUTO GUTi OUT? OUTS OUT MooE RST (2) 73) 2) 03) f2) 1 fH mH L07730, 7730M OT iy Ty iy te Wy vss osc oc OR INV Tl «12 Set Package Dimensions Package Dimensions (unit: mm ) (unit: mm ) 3006B-D16iC (107730) 3035A-M16IC [L¢7730M) 6 9 fonoonond pHHApnge fs too Ft Dodoo OU i 1 4 19.2 3 HORE EU Ee i 10.1 loss. 8 a a 2 ne - SANYO : MFP 16 o oA r 4.2 wa 256 SANYO: DIP16 1.27 0.605 SANYO Electric Co.,Ltd. Semiconductor Business Headquarters - TOKYO OFFICE Tokyo Bldg.,1-10,1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN B290TA/2038TA | No. 2644.1/8

C7730, 7730M ee Absolute Maximum Ratings/Ta=2512C, Vss=0V [Mexinum Seep vatne| Voomax) OO Ee Output Voltage pee Ran [em sore er} asi [ioure [Pins OUT! to OUTA [| [ore Sern [Pt noc Tease fa | [mer Test Tt a [sore Tenperawe [Tig [| Allowable Operating Range/Ta=-10 to +750, Vss=0V [nae [owe] cone Ton [Soy vanes [veo [Tops Sid ta || 8 [wt vorewe [vw [Toes] (Wo, Output vortage | Vout | Tops, pin oUTO | 0 | 15.0 | fren Hom [nrcrceor ome te fa Electrical Characteristics/Ta=25+2C, Vss=0V [eee [ome] eon | a ee ee ‘L! Level Output Pat {eie SUR wey Lt a | [eect areas OTRO Lior [pin OUrG, vomiev | || |_| aa | pe! ea Saft Pe OOTY vo DUTEnecest a | aT | [eters Ours cures] iors Pine OUTT to OUTAva=osv| 3 | wo {| | [+4" Level input current | tmnt | Pins RST and SET 2+} {J aa | Risariar eer fia —|Cote putt roenes) [es —-—[ =orf |" Pine TH ond T2 Pee a frueaties coer [ier —| tte toes rete | pf Stef re ee Ge ['H" Level input Voltage | Level input Voltage [vin | [of 0-7V00 | [| voo | [teva vote [ve fi | No. 2644-2/8

LC7730, 7730M Ho —— @ Pin Description Pin No] Pin Name | Functiona! Description Input/Output [1 [vss | Power spot nia vs [| = [3 foo] INV Input pin for OUTO out-T H level: Output transistor OFF at the timer run Put inversion (normally, | | jevet; Gutput transistor ON at the timer run this pin level is "Li. me in @ pull [6 [ti] Fest in [ 7. | Normally, this pin Is connected with the Vss pin or left . tnput with a pull- ” T2 (Normally, this pin Is connected with the Vss pin of open). Wout with Ser Set pin (for control input to the timer] Input with a pull- If the MODE input = 'H', this pin Is used to Input a start/preset signal to the timer. " up realetor M1 the MODE input = 'L', this pin Is used to input a start/stop signal to the timer, RST Reset pin (for reset or stop input to the timer) Input with a pull- If a capacitor Is added externally to this pin, a power-on reset circuit | up resistor can be formed. (Schmitt_Input) [10 | MODE Operation mode select pin (SET Input function) [11 [OUTa | ompur pine tor taped time atoy | 12 ours If the chip is used as an hour-long timer, these pins become active ('L') every 15 minutes In the order of OUTT, OUT2Z, OUTS and OUTS. | 13 [oure [ow | 4 [our [ow OUTO Switching output pin Open drain output Output pin for switching the timer loads in radio circults, ete, Normally, buffered by an external PNP transistor. [16 [voo _| Power supply pin (1.8V to 6.0V) [| -._ | Note: If a pin is low active, it is indicated by a 'top bar’, Input/Output Configuration Yoo OUTO OUTT = OUTZ «OUTS. |S OUT4. Ss MODEST Voo A A A &B an : : ‘ H : 1 t ' H i t i i H ! ' 1 : : ‘ i : J >4D- L\\ AN, A, J vo Vss oso oc mR INV TL T2 SET £50k eee No, 2644.3/8

LC7730, 7730M SSSSSSSSSSSSSSSSSSSSSSSSSsSsSSSSSSssSSSSSSSSSSssSSFSSSMsSSee OOS GOTT GUT? OUTSOuTZ of oF me] _owna nuser | a GE ae Move «SET = RST. Figure-1. LC7730 Configuration 1. Oscillation Circuit The LC7730 uses a CR oscillation circuit to generate various timing signals. The C and R shown in Figure-2 determine a time constant to generate required timing signals. The RS is a resistance to limit the current that flows into the input protection circuit, thereby reducing the total power dissipation of the oscillation circuit. L779 Tastep clock psc joc OR Rs or RT ~—_ {0s 2 2x GrRr Figure-2. Oscillation Circuit If the LC7730 uses an oscillation frequency of 4.66kHz, it can work as an hour-long timer. As the oscillation frequency can be changed, the LC7730 can be used as various types of timers. The relation between oscillation frequencies and timer values is as follows: fosc (te) = Tier value X60 2.2XCTRY (min.) ‘Timer values and Oscillation frequencies Oscillation frequency Oscillation frequency 10 minutes 28.0kHz [1 hour | 4660Hz [20 minites ra.oeHe 2500 [40 minutes —| epi T165He [50 minutes | _ssoantz | 5 tours | saat eee . No. 2644.4/8

LC7730, 7730M i SSSSSSFSSSSSSSSSSSSSSSSSSSSee 2, Basic LC7730 Operations SET input | DUTT output j — " H H -t ‘OUTS output 7 —| TTT ‘OUTS output rr rs ee 4 Hi i h 7 - 4 i i H iy OUTS output 7 : : 4 H H H — -t : 1 i ' p DUTO output } H i OFF : t t r i ~ ON i { ! H - H OR output { ' | 2) wn WL k 7h i : \\ H Elapsed time HR ition) : H H Timer stotus HAT Nar Figure-3. Basic operationa! timing chart (fosc=4.66kHz/RST input pin = 'H! level, INV input pin = 'L! level) If the SET pin of the timer currently in the stop mode becomes active (active low), the timer will enter the 'run’ status. When the timer is started, it turns on the OUTO output pin to drive a external load and then outputs an 'L' tevel signal from the OUTT pin, Output pins from OUT to OUT4 are provided to display timer elapsed times, They become active ('L' level) very 15 minutes in the order of OUTI, OUT2, OUTS and OUT4, lf an hour elapses after the timer is started (with the fosc<4.66kHz), the timer turns off the OUTT pin, inactivates output pins OUTT to OUT4, and then enters the stop mode. When the timer enters the stop mode, it stops the oscillation to reduce the power dissipation. Note that if the INV input pin changes to the 'H' level, the OUTO output will be inverted. Table-1, Operational Status-Output level (fosc=4.66kHz) [saw | (minute) OuTI OUT2 OUT3 OUT4 ve wat fa [run [ons oa a LS a A so fo aa HALT: Stop 0: L level Note: The OUTO H level means that the open drain output transistor RUN : In action 1: H level is in the OFF state. 3. LC7730 Control The LC7730 can be controlled by using three pins RST(active low), SET (active low) and MODE (active high). 'f the RST (reset) pin changes its level to 'L' from 'H', the timer will stop and its internal circuitry will be reset. This pin has the schimitt input specification with an internal pull-up resistance. If a capacitor is added to this pin externally, the power-on reset circuit will be formed. The SET (active tow) pin is used to input a start/stop and start/preset signal to the timer. The pin functions depend on the MODE pin tevel. The SET pin has a chattering elimination circuit with an internal pull-up resistance. The timer will start its operation at the moment when this pin becomes active. The MODE pin has the functions as shown in Table-2. It is used to select one of the SET pin functions. ee No. 2644-5/8

LC7730, 7730M SSeS Table-2. MODE input pin and SET pin functions [ MODE input | SET pin function [0 __| Start/stop input [1 __| Start/preset input (1) Start/stop function (MODE pin = 'L! level) 'f MODE pin = 'L', the SET pin can be used for start/stop input. When the timer is in the stop state and the SET pin becomes active (active low), the timer is started. If the timer is in action and the SET pin becomes inactive, the timer stops. (2) Start/preset function (MODE pin = 'H! level) If MODE pin = 'H', the SET pin can be used for start/preset input. When the timer is in the stop state and the SET pin becomes active (active low), the timer is started. If the SE pin becomes active immediately after the timer is started, the timer value advances 15 minutes. Table-3. Preset time value (fosc=4.66kHz) Elapse time (minute) | Preset time (minute) 15 to 30 a | [30 to 45 Pas | 45 to 60 [ eo Table-4, Input-operationa! status relationship Resulted status MODE Hat fo Pat Reset run [nat HAUT PO ro tart/stop mode a THact | a HALT [| | | Start/preset mode [aun [a Fr HALT :Stop 0: 'L' levet X = Don't care RUN :In action 1: 'H! level ~Y_: Falling signal edge 4. Sample Application Circuits (1) Sleep timer | (minimum configuration) (CD (= a , GUTS OOF CUTS Cutt GUC MODE FST Lc7730 Ves osc oc OR INV TI 12 SET | bude} LE] I = Ri Exampte time (Ct !0000F " f strt/sten constants Rr=100ka 2 A Fis=200k2 ” eee No, 2644-6/8

LC7730, 7730M (2) Sleep timer II (preset function/elapsed time display) | pa 151 a) py pn 1 £7 ‘vbo OUTO OUTI OUT? OUTS GUT MODE RST 107730 vss osc oc OR INV 11 12 SET ee Rr } start/preset (3) Application example using smaller timer value +Vo0 +#Vo0 Control output 1 ps4a2z [é)_fs|_ fi Lamae es a — 280536 Voo OUTO OUTi OUT2 OUT3 OUT4 MODE RST 10x mr a c7730 Vss_osc__oc OR INV 1) _—oT2_ SET LIE) Be TL [s] Rr of SET sw Cr + 1000pF I Rr? 100k Fis = 200kQ In this application circuit, the OUT2 pin output signal causes the timer to be forcibly reset. This can be called a self-reset function. As a result, this timer value can be reduced to the 1/4 of a normal time value. The CR time constant is given for an hour-long timer. However, this timer can work as a 15-minute timer. The time value for this circuit is calculated in the following manner: fosc(Hz)= a Timer value x60 , (min.) No. 2644.7/8

LC7730, 7730M SS fosc — Vop 5 fosc — RT : E ¢ | supply voltage-Oscitlation a F Ose Neuen naiatto ae (Yor x frequency characteristics | [| ft | x, Fis=510k2 1 1 iS SLiUocrrry | §4+4~ "4 34 x 330pF PLY tt yt |g. NE POEPEPTE fh ARN ra zy IN b IN pL i tT gt Ree | 21 ‘Cr=270F B10 < IN 2 ! = Rr=320kQ = gLI TLL Ves | gf New OKONY J | 6 0 * és IN IN o 1 2 3 4 5S 6 7? 8B 2 3 100 2 3 100-2 Supply Voltage, VoD - V Rr — ko to - Vou '2( Output voltage-Output current characteristics < (OUTO output/pin 15) 5V LLL ‘ 3v 2 |Z (7 rd pp av < ZL 4 s | | LAT I é | Aa i| [Ar | 52 eA “lA | tt °O or 02 03 04 05 06 0.7 Output Voltage, VOL - V 6 lot > Vou 6 ton — Vou Output voltage-Output current characteristics Output voltage-Output current characteristics m Ov AV, (OUT1 to OUTS pins/| (OUT! to OUT4 ey sv <5 pins 11 to 14 { —5|_ cutouts /pins : WZ il : — | Ae a4 1-4 Z| _41 a i A oe B LA L s | WL 1 5a Ml | au aaa a1 fe 2 ly B., AL “1 L——T 0 0 Output Voltage, VoL - V Output Voltage, (VOH - VDD) - V WNo products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. . HM Anyone purchasing any products described or contained herein for an above-mentioned use shall: . ® Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, ‘subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and ali damages, cost and expenses associated with such use: @® Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO,, LTD,, its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally, Hi Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production, SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. No. 2644-8/8