CDT3050V BOWIN | Alldatasheet
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CDT3050V P. 1 3-DIGIT DOWN TIMER IC ■■ ■■ DESCRIPTION ■■ ■■FEATURES The CDT3050H 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 /circle6 CMOS Technology /circle6 Supply Voltage Range ：1.2 ~ 1.8VDC /circle6 Low Standby Current < 5µ A /circle6 With a Trigger Output Capability /circle6 Time Setting ： Max: 999 Minutes Min: 1 Minute /circle6 32768 Hz Crystal used /circle6 LCD displays Seconds until the last minute /circle6 16 seconds, 4Hz (64 Sounds) BiBi Alarm when time runs out /circle6 “ /pentastar2” - Operating symbol /circle6 “ S” - Seconds symbol ■■ ■■ APPLICATIONS ■■ ■■DEVICE TYPE Type No. Package CDT3050V Chip form /circle6 Count Down Timer /circle6 Electronic Timer /circle6 Setting Control Timer ■■ ■■DC ELECTRONICAL CHARACTERISTICS Characteristics Symbol Min Type Max Unit Operation V oltage VDD 1.2 1.5 1.8 V Operation Current Idd - - 2.0 µ A BZ Driver Current Ibz 2.0 - - mA Crystal - 32768 - Hz LCD Display Freq - 32 - Hz K0~K9 Input Current Ikey - - 5 µ A Trigger Output Current Itrig 1 - - mA ※ Above testing conditions are based on VDD=1.5V 其朋半導體股份有限公司 Chip Design Technology Inc. 89 年 10 月 24 日
CDT3050V P. 2 3-DIGIT DOWN TIMER IC ■■ ■■PAD ASSIGNMENT ■■ ■■ PIN DESCRIPTIONS Chip PAD Symbol Functions Description
1 VDD Positive Power Supply
2 VSS Negative Power Supply
3 OSCO Oscillator Output , with 32,768Hz Crystal
4 OSCI Oscillator Input
5 STAP START/STOP key, START, STOP push switch
6 TS1 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) VEE COM2 FE1 AG1 BC1 FE2 AG2 BC2 FE3 AG3 BC3 22 /pentastar2 / S COM1
20 BZ1
19 BZ2
Chip Size: 3180 X 2040 μM ＊IC 底座接 VDD
CDT3050V P. 3 3-DIGIT DOWN TIMER IC Chip PAD Symbol Functions Description TRIG Trigger Output ：
18 TS2 Internal Testing pin
Continues BiBi Alarm, 16sec 4Hz – 64 Sounds COM1 ★/S BC3 AG3 FE3 BC2 AG2 FE2 BC1 AG1 FE1 COM2 LCD Common1 (★) Timer is working ；( 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
36 VEE V oltage Doubled Input
37 CAP1 V oltage Doubled Capacitor
38 0512 V oltage Doubled Capacitor START 0 START STOP
CDT3050V P. 4 3-DIGIT DOWN TIMER IC ■■ ■■APPLICA TION CIRCUITS
10 KEYS SETTING TIMER
■■ ■■ LCD DRAWING COM2 Segments COM1 Start/Stop OSCI OSCO CAP1 CAP2 VEE BZ1 BZ2 VDD VSS TRIG /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 /ring2 S COM2 COM1 Buzzer 1.5V 104 104 32768Hz 10PF
3 Digit
a g d c e f b a g d c e f b a g d c e f b s COM2 F1 A1 B1 / F2 A2 B2 / F3 A3 B3 / ★ / / E1 G1 C1 D1 E2 G2 C2 D2 E3 G3 C3 D3 S COM1 COM2 COM1 E1 G1 C1 D1 E2 G2 C2 D2 E3 G3 C3 D3 S F1 A1 B1 F1 A2 B2 F3 A3 B3 ★ DIGIT1 DIGIT2 DIGIT3