ls ls381 1 3 keys clock with 5 daily alarm version 1.1 (2005.06.03) 1 general description this is a low cost single chip 3 keys clock with 5 daily alarm. features: * operating voltage 1.5v * low power consumption * hour minute display for different mode. * on-chip, 4-digit, 1/3 duty cycle, 1/2 bias, lcd d river. * lcd bias level: 0.0v, 1.5v, 3.0v. * on chip 32768hz crystal. * daily alarm - it generates a sound (4khz x 8hz x 1hz) for 60 seconds. pressed any key to stop it. * chime function - every hour on the hour, beep (4k hz x 4hz x 1hz) for 1 second. * 4khz on-chip buzzer output driver to give alarm s ound and beep tone. * bonding option of alarm non-stop until user disab le. * bonding option of 12/24 hour format display. * bonding option of max. 2 -- 5 selectable daily al arm time. lcd display
ls ls3811 version 1.1 (2005.06.03) 2 operation flow chart note1: while the clk mode is display, depress ?adj? key once to changeover the chime function on duty and off duty. the chime mark enable mark will appear when the chime function is on duty. note2: while the one of alarm mode is display, depr ess ?adj? key once to changeover the alarm function on duty and off duty. the daily alarm mark enable mark will appear when the alarm function is on duty. setting function(different mode) note1: press ?set? key to leave setting mode.
ls ls3811 version 1.1 (2005.06.03) 3 pin assignment designation type description b0, b1 output buzzer output f512, vcap output doubler output vee output -1.5v t1, t2 input test pin cosco output 32khz oscillator output cosci input 32khz oscillator input vdd power +1.5v power supply gnd power ground kmode, kset, kel input(pl) input key bal input bonding option pb input(ph) power up reset c[1:3] output lcd common output s[1:17] output lcd segment output note: (ph) - pull high; absolute maximum ratings supply voltage vdd - vss..........................0 to 5v input voltage vin.................................v ss to vdd operating temperature top .............-10 c to 60 c storing temperature tst ...................-40 c to 70 c comments stress above those listed under } absolute maximum ratings? may cause permanent damage to the device. these are stress rating only. functional operation of this device at these or any other conditions above those indicated in the opera tional sections of this specification is not impli ed and exposure to absolute maximum rating conditio ns for extended periods may affect device reliability. d.c. electrical characteristics (gnd = 0v, vdd = 1.5v, ta = 25 c unless otherwise specified) parameter symbol min. typ. max. unit conditions supply voltage vdd 1.25 1.5 1.75 v operating current idd - 2 5 a no load osc. built-in cap cd - 20 - pf osc. trimmer cap ctrim 5 - 35 pf frequency stability ^f/f - - 10 ppm vdd=1.6-1.4 buzzer output current ib 200 - - a vbd-vss=0.5 lcd frequency flcd - 64 - hz segment current is 0.15 - - a vseg=0.2v common current ic 3.0 - - a vcom=0.2v
ls ls3811 version 1.1 (2005.06.03) 4 pad coordinate pad x( ? m) y( ? m) pad x( ? m) y( ? m) s17 vcap vee v512 c3 c2 c1 s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15 s16 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1295.0 -1303.0 -1163.0 -1023.0 -883.0 -1394.0 -1251.0 -1110.0 -965.0 -825.0 -685.0 -545.0 -400.0 -260.0 -120.0 +20.0 +160.0 +300.0 +440.0 +580.0 +720.0 +860.0 +1000.0 +1140.0 +1350.0 +1350.0 +1350.0 +1350.0 pb r2(beep) r1 r0(trig) osco osci t1 gnd b1(motor) b0(motor) vdd t2 i7 i6 i5 i4 i3 i2 i1(kal) i0(ktime) i8 i9 i10 i11 -743.0 -593.0 -449.0 -225.0 -75.0 +1105.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1246.0 +1350.0 +1350.0 +1350.0 +1350.0 +1350.0 +1340.0 +1340.0 +1140.0 +988.0 +678.0 +543.0 +395.0 +226.0 +78.0 -70.0 -216.0 -365.0 -513.0 -661.0 -809.0 -957.0 -1105.0 -1253.0 -1400.0
ls ls3811 version 1.1 (2005.06.03) 5 pad location
ls ls3811 version 1.1 (2005.06.03) 6 application circuit bonding option a(total number of daily alarm) bonding option a(total number of daily alarm) bonding option a(total number of daily alarm) bonding option a(total number of daily alarm) i5 without resistance i4 without resistance two alarm gnd gnd three alarm gnd vdd four alarm vdd gnd five alarm vdd vdd bonding option b bonding option b bonding option b bonding option b pin connection pin connection i6 without resistance vdd: 24 hour format gnd: 12 h our format bonding option c bonding option c bonding option c bonding option c pin connection pin connection i7 without resistance vdd: press key to stop alarm gnd: 60 seconds alarm
ls ls3811 version 1.1 (2005.06.03) 7 lcd drawing lcd table c1 c2 c3 s1 2f 2e 1b s2 2g 2d 1c s3 2a s4 2b 2c 1a/d/e/g s5 3f 3e col s6 3g 3d s7 3a s8 3b 3c s9 4f 4e s10 4g 4d s11 4a s12 4b 4c s13 2* 4* chime s14 1* 3* 5* s15 al2 al4 pm s16 al1 al3 al5
ls ls3811 version 1.1 (2005.06.03) 8
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