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| Bbq a 1/2- |/ NeAE3/4 Chip Design Technology 89 |~ 10 e 24 e CDT3050 P. 1 3-DIGIT DOWN TIMER IC 1/2 DESCRIPTION 1/2 FEATURES CMOS Technology Supply Voltage RangeG 1.2 ~ 1.8VDC Low Standby Current < 5A With a Trigger Output Capability Time SettingG Max: 999 Minutes Min: 1 Minute 32768 Hz Crystal used LCD displays Seconds until the last minute 16 seconds, 4Hz (64 Sounds) BiBi Alarm when time runs out " " - Operating symbol "S" - Seconds symbol The CDT3050 is a low voltage 3 digits LCD driver for advanced Count Down Timer. Minimal components are used. With START/STOP and RECALL setting functions. LCD: 1/2 Duty, 1/2 Bias, 2 Commons 1/2 APPLICATIONS 1/2 DEVICE TYPE Type No. CDT3050 Count Down Timer Electronic Timer Setting Control Timer Package Chip form 1/2 DC ELECTRONICAL CHARACTERISTICS Characteristics Operation Voltage Operation Current BZ Driver Current Crystal LCD Display Freq K0~K9 Input Current Trigger Output Current Symbol VDD Min 1.2 2.0 Type 1.5 32768 32 Max 1.8 2.0 5 Unit V A mA Hz Hz A mA Idd Ibz Ikey Itrig 1 Above testing conditions are based on VDD=1.5V CDT-3050 --- 1 CDT3050 P. 2 3-DIGIT DOWN TIMER IC 1/2 PAD ASSIGNMENT 36 35 34 33 32 31 30 29 28 27 26 25 24 23 /S COM1 22 VEE COM2 FE1 AG1 BC1 D1 FE2 AG2 BC2 D2 37 FE3 AG3 BC3 D3 21 CAP1 0512 38 CDT3050 Chip Size: 3180 X 2040g M IC (c)(R)y VDD BZ1 BZ2 K9 7 20 19 1 2 3 VDD VSS OSCO K8 8 OSCI STAP TS1 4 5 6 K7 9 K6 10 K5 11 K4 12 K3 13 K2 14 K1 15 K0 16 TRIG TS2 17 18 1/2 PIN DESCRIPTIONS Chip PAD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VDD VSS OSCO OSCI STAP TS1 K9 K8 K7 K6 K5 K4 K3 K2 K1 K0 Functions Description Positive Power Supply Negative Power Supply Oscillator Output , with 32,768Hz Crystal Oscillator Input START/STOP key, START, STOP push switch Internal Testing pin Time Setting Key (9) Time Setting Key (8) Time Setting Key (7) Time Setting Key (6) Time Setting Key (5) Time Setting Key (4) Time Setting Key (3) Time Setting Key (2) Time Setting Key (1) Time Setting Key (0) CDT-3050 --- 2 CDT3050 P. 3 3-DIGIT DOWN TIMER IC Chip PAD 17 Symbol TRIG Functions Description Trigger Output G START 0 START STOP 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 TS2 BZ2 BZ1 COM1 /S D3 BC3 AG3 FE3 D2 BC2 AG2 FE2 D1 BC1 AG1 FE1 COM2 VEE CAP1 0512 Internal Testing pin Buzzer Output Buzzer Output Continues BiBi Alarm, 16sec 4Hz - 64 Sounds LCD Common1 ( ) Timer is workingF ( S ) Seconds symbol LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD segment LCD Common2 Voltage Doubled Input Voltage Doubled Capacitor Voltage Doubled Capacitor CDT-3050 --- 3 CDT3050 P. 4 3-DIGIT DOWN TIMER IC 1/2 APPLICATION CIRCUITS 10 KEYS SETTING TIMER COM1 S COM2 3 Digit COM2 Segments COM1 Start/Stop K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 BZ1 Buzzer BZ2 VDD CDT3050V VSS TRIG 1.5V OSCI OSCO CAP1 CAP2 VEE 104 10PF 32768Hz 104 1/2 LCD DRAWING DIGIT1 F1 E1 COM2 A1 G1 B1 C1 D1 F1 E2 DIGIT2 A2 G2 B2 C2 D2 F3 E3 DIGIT3 A3 G3 B3 C3 D3 S COM1 a f g b f a g b f a g b A3 G3 e d c e d c e d c s / D3 S / COM1 COM2 F1 / E1 A1 G1 B1 C1 / D1 F2 E2 A2 G2 B2 C2 / D2 4 F3 E3 B3 C3 CDT-3050 --- |
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