LSI LS 1357 4 Digit Time With Colon Default Timer 1. Features 4 digit LCD display with two dots. Default Timer for Hour / Minute or Day / Hour by bonding option. 1 keys operation. 4 bonding option to select default timer value. Very low power consumption. 32768 Crystal oscillator. Single 1.5V operation. Direct drive 1/2 bias 1/3 duty LCD(Vop 3.0V). Alarm sound: The alarm sound continues for 60 seconds. It generates (4KHz x 4Hz x 1Hz) sound signal at first 60 seconds. The alarm sound will be stopped by pressing any key. Key tone : It will generate a sound signal (tone) when start/stop key is pressed. Power on : All LCD segments and the alarm sound are turned on for two second. LCD Drawing Version 1.2 (24, 10, 2003) LSI LS 1357 Operation Flow (a) After the power on, it return to display shows “Default timer value”, “colon” and “TM” always on (not flash). (b) Countdown Timer: This timer fixed timing count down. The step is one minute or one day (selectable by bonding option) . Press “Start/Stop” key to start counting. The “TM” always on. The “colon” 0.5 second on and 0.5 second off at counting, no flash at stop The alarm sound generates when the timer reached zero, press “Start/Stop” key to stop counting even the timer in counting or reached zero, press the key again then return to continues counting. (c) Press “Start/Stop” and hold it for 2 second, the timer will reload “Default timer value” and stand-by for start counting. (d) Keys: Only “ST/SP” key for start, stop and repeat. Pin Assignment DESIGNATION TYPE DESCRIPTION B0, B1 V1, V2 VEE T1, T2 OO OI VDD GND I0, I1, I2, I3, I4 and I5 C[1:3] S[1:10] PB O0, O1, O2 and O3 OUTPUT OUTPUT OUTPUT INPUT OUTPUT INPUT POWER POWER INPUT(PL) OUTPUT OUTPUT INPUT(PH) OUTPUT Buzzer output Doubler output -1.5V TEST pin 32KHz oscillator output 32KHz oscillator input +1.5V power supply Ground Input key LCD Common output LCD Segment output RESET Output Pin Note: (PH) - pull high , (PL) – pull low. 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 2 Version 1.2(24, 10, 2003) LSI LS 1357 (GND = 0V, Vdd = 1.5V, Ta = 25°C unless otherwise specified) Parameter Supply Voltage Operating current OSC. built-in cap OSC. trimmer cap Buzzer output current Buzzer output current LCD frequency Segment current Common current Symbol Vdd Idd Cd Ctrim IOH IOL Flcd Ilcd Icom Min. 1.25 5 6 6 0.15 3.0 Typ. 1.5 2 20 64 - Max. 1.7 4 35 - Unit V µA pF pF MA MA Hz µA µA Conditions No load Vbd=0.0 Vbd=1.5 Vseg=0.2V Vcom=0.2V Pad Location Pad Coordinate 3 Version 1.2(24, 10, 2003) LSI LS 1357 PAD X(µ µm) O2 O1 O0 O3 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 C1 C2 C3 V2 V1 -1063.00 -922.75 -731.25 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1063.00 -1033.00 -898.00 -763.00 -628.00 -493.00 PAD Y(µ µm) -909.50 -909.50 -909.50 -703.50 -568.50 -433.50 -298.50 -163.50 -28.50 163.00 298.00 433.00 568.00 703.00 909.50 909.50 909.50 909.50 909.50 VEE KOUT PB OO OI GND BD[0] T1 T2 B[1] VDD I5 I4 I3 I2 I1 I0 X(µ µm) -358.00 -123.50 20.25 321.75 874.75 1062.75 945.25 945.25 945.25 945.25 1062.75 1062.75 1062.75 1062.75 1062.75 1062.75 1062.75 Y(µ µm) 909.50 909.50 909.50 909.50 909.50 717.00 547.50 412.50 277.50 142.50 -27.00 -162.00 -300.50 -444.50 -583.00 -727.00 -865.00 Application Circuit 4 Version 1.2(24, 10, 2003) LSI LS 1357 Key`s summary Press once I5(Key/Start/Stop Start/Stop ) Press and hold 2 Second Reset default value Bonding option A (Range Selection) Pin connection Pin connection I4 without resistance VDD: Day / Hour Timer GND: Hour / Minute Timer Bonding OptionB ptionB(Default Value) I3 I2 I1 I0 Default Value Day GND GND GND GND 1 GND GND GND VDD 2 GND GND VDD GND 3 GND GND VDD VDD 4 GND VDD GND GND 5 GND VDD GND VDD 6 GND VDD VDD GND 7 GND VDD VDD VDD 14 VDD GND GND GND 28 VDD GND GND VDD 30 VDD GND VDD GND 45 VDD GND VDD VDD 60 VDD VDD GND GND 70 VDD VDD GND VDD 80 VDD VDD VDD GND 90 VDD VDD VDD VDD 99 Default Value Hour 1 2 3 4 5 6 8 10 12 18 36 60 70 80 90 24 Output Waveform 5 Version 1.2(24, 10, 2003) LSI LS 1357 LCD Drawing LCD Table(LCD – 13XX) COM1 COM2 COM3 Pin Name Pad COM3 Pin 8 S5 2b 2c 2d Pin 9 S6 3f col 3e Pin 10 S7 3a 3g 3d TM Pin 11 S8 3b 3c 4e 1g 1d Pin 12 S9 4f 4g 4d 2f 1b 1c Pin 13 S10 4a 4b 4c 2a 2g 2e Pin Name Pad Pin 1 C3 Pin 2 C2 Pin 3 C1 COM1 Pin 4 S1 1f 1e Pin 5 S2 1a Pin 6 S3 Pin 7 S4 COM2 6 COM1 COM2 COM3 Version 1.2(24, 10, 2003)