LSI LS3262 4 Digit Alarm Clock With Calendar Features: (a)Single 1.5V operating voltage. (b)Directly driving 2x14 segment LCD. ©4 display functions: Clock(12 hour format), daily alarm, date and second. (d)External trigger function in daily alarm output. (e)Daily Alarm - It generates a sound (4KHz x 8Hz x 1Hz) with external trigger function for 60 seconds. Pressed any key to stop it. Chime Function - Every hour on the hour, beep sound (4KHz x 4Hz x 1Hz) for 1 second. (f) 32768 Hz quartz crystal provide the time base, and machine cycle = 4KHz. (g) Power on reset: When the power up, all LCD segments and the alarm sound are turned on for one second. (h)Programmable reset: When “ M ” key and “ S ” key press together, all LCD segments and it generates a sound(4KHz x 8Hz x 1Hz)with external trigger function. It will be stop and return to normal clock mode until release all keys.. (i)Low power dissipation. (j)Keys: “ M --- Mode (mode and adjust), “ S --- setting. General Description The LS3262 is a single chip CMOS timer circuit with calendar. It is designed to drive a LCD(4 digits). The timer circuit is based on a 32768Hz quartz crystal controlled oscillator. An oscillator capacitor is build in the chip. An external 32768Hz quartz crystal is required to complete the oscillator circuit. The operation of the basic timekeeping functions is controlled via two keys. When power up reset, the clock will be reset to 1.1 12:00 and 00 seconds(12 hour format). The circuit has a built-in voltage doubler (to drive the LCD ) which needs two external capacitors. Only one 1.5V battery is required to power the entire circuit. It has a trigger output to drive external I.C. Direct drive buzzer output. LSI LS3262 4 Digit Alarm Clock With Calendar LCD Drawing ALM PM (1) (3) (2) (4) ((*)) COL CHIME Functional Description (a) After the power on, it switch into clock state and shows “12:00”(12 hour format). The default value “1 Jan 12:00:00”. (b) It shows 12 hour format and four group of “Hour/minute”, “Alarm time”, “Month/date”, and “second”. In clock state, “Hr : Min” is shown with colon flashing 0.5 sec on and 0.5 sec off. Press “M” key to indicate the “Alarm time” (if no key is pressed for 5 seconds, it will auto return to clock state “Hr : Min”), press “M” key again to indicate the “Month/date” (if no key is pressed for 5 seconds, it will auto return to clock state “Hr : Min”). Press again to show the “second”. It can be clear by pressing “S” key. It will stay in second indication until return to clock state by pressing “M” key (the colon always on and not flash in second state, it only flash in clock state “Hr : Min”). (c) In normal state, press “S” key into the clock setting state. The first setting is alarm option (alarm on/off or chime on/off), it can be change by pressing “M” key. Press “S” key to alarm hour setting, it can be set cycling from “12: A”(12 hour format) to “11: A”(12 hour format), “12: P”(12 hour format) to “11: P”(12 hour format) by pressing “M” key. Hold(2 sec) the “M” key will have auto advance. Press “S” key to alarm minute setting, it can be set from 0 to 59 by pressing “M” key. Hold (2 sec) the “M” key will have auto advance. Press “S” key to return normal mode (with alarm setting) or month setting (without alarm setting), it can be set from 1 to 12 by pressing “M” key. Hold (2 sec) the “M” key will have auto advance. Press “S” key to date setting, it can be set from 1 to 28/30/31(depend the month) by pressing “M” key. Hold (2sec) the “M” key will have auto advance. Press “S” key to hour setting, it can be set cycling from “12: A”(12 hour LSI LS3262 4 Digit Alarm Clock With Calendar format) to “11: A”(12 hour format), “12: P”(12 hour format) to “11: P”(12 hour format) by pressing “M” key. Hold (2 sec) the “M” key will have auto advance. Press “S” key to minute setting, it can be set from “:00” to “:59” by pressing “M” key. Hold (2 sec) the “M” key will have auto advance. Press “S” key to return normal mode (without minute setting) or hold mode(with minute setting). In the hold mode, press “M” key only to return normal mode. Pin Assignment DESIGNATION B [0:1] V1, V2 VEE T2, T1 OO OI VDD GND I[0:5] O[0:3] C[1:2] S[1:14] TYPE DESCRIPTION OUTPUT OUTPUT OUTPUT INPUT (PL) OUTPUT INPUT POWER POWER INPUT(PH) OUTPUT OUTPUT OUTPUT Buzzer output Doubler output -1.5V TEST pin 32KHz oscillator output 32KHz oscillator input +1.5V power supply Ground Input key/option Trigger output (O[0:2]) LCD Common output LCD Segment output Note: (PL) – pull low (PH) - pull high Absolute Maximum Ratings Supply voltage Vdd - Vss..........................0 to 5V Input voltage Vin.................................Vss 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 operational sections of this specification is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability. D.C. Electrical Characteristics LSI LS3262 4 Digit Alarm Clock With Calendar (GND = 0V, Vdd = 1.5V, Ta = 25°C unless otherwise specified) Parameter Supply Voltage Operating current OSC. built-in cap OSC. trimmer cap Frequency stability Buzzer output current LCD frequency Segment current Common current Trigger output current Symbol Vdd Idd Cd Ctrim ^f/f Ib Flcd Is Ic Ir Min. 1.25 5 500 0.15 3.0 100 Typ. 1.5 2 20 64 - Max. 1.7 5 35 10 - Unit V µA pF pF ppM µA Hz µA µA µA Conditions No load Vdd=1.6-1.4 Vbd-Vss=0.5 Vseg=0.2V Vcom=0.2V Vr-Vss=0.5 LSI LS3262 4 Digit Alarm Clock With Calendar Pad location Chip Size: 2690um x 2120um LSI LS3262 4 Digit Alarm Clock With Calendar Pad Coordinate PAD NC[6] NC[7] TEST1 TEST2 R0 C[2] S[1] S[2] S[3] S[4] S[5] S[6] S[7] S[8] S[9] S[10] S[11] S[12] S[13] S[14] X(µ µm) -667.0 -802.0 -937.0 -1072.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1208.0 -1012.0 -821.0 -686.0 Y(µ µm) -923.0 -923.0 -923.0 -923.0 -923.0 -717.0 -582.0 -447.0 -312.0 -177.0 -42.0 +149.0 +285.0 +476.0 +646.0 +781.0 +916.0 +923.0 +923.0 +923.0 PAD C[1] V2 V1 VEE PB OO OI GND B0 B1 VDD NC[5] NC[4] NC[3] NC[2] SET MODE X(µ µm) -494.0 -361.0 -223.0 -90.0 -47.0 +348.0 +901.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 +1098.0 Y(µ µm) +923.0 +923.0 +923.0 +923.0 +923.0 +916.0 +916.0 +724.0 +554.0 +149.0 -20.0 -156.0 -294.0 -438.0 -576.0 -720.0 -859.0 LSI LS3262 4 Digit Alarm Clock With Calendar Application Circuit VDD VDD 1.5V GND OI LSI 3262 32768Hz LCD XTAL OO V1 VDD 0.1 S[1:14] C[1:2] 0.1 S[1:14] C[1:2] V2 VEE R0 External Trigger Pin T2 T1 PB B0 MODE SET SUBSTRATE TO VDD LCD DRAWING B1 PIEZO BUZZER LSI LS3262 4 Digit Alarm Clock With Calendar PIN 1........ A ALM (1) PM (3) (2) (4) F B G ((*)) E COL C D CHIME PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SEG C2 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 C1 PM C1 D2 E2 G2 C2 E3 G3 C3 E4 G4 C4 D4 COM2 ALM ADEG1 B1 F2 A2 B2 F3 AD3 B3 F4 A4 B4 COL C1 C2 CHIME COM1 *)) LSI LS3262 4 Digit Alarm Clock With Calendar