V3003

Function:                                                          Features:

* five functions: month, day, hours, minutes, seconds;      * Single chip CMOS process;

* calendar for four years;                                                        * three half LCD display;
 
* second correction;                                                                * low power consumption;

* Two key switch operation;                                                    * standard 32768 hz crystal oscillator;

* colon display;                                                                         * 3 v working voltage;

* LCD test;                                                                                 * built-in crystal oscillator capacitor;

* EL backlight.

Electrical characteristics

Electrical parameters	symbol	conditions	The minimum value	Typical values	Themaximum	unit
Working  voltage	Vdd		2.4	3	3.6	V
Oscillation frequency	Fosc		---	32768	---	Hz
LCD frequency	FD		---	32	---	Hz

The font display

Setting process:

APPLICATION INFORMATION

Name	X,Y	Name	X,Y	Name	X,Y	Name	X,Y
VDD	70，512	AD3/G3	415，70	COM2	980，302	GND	70，910
S1	70，407	F3/E3	525，70	XT	980，407	T1	70，816
COM1	70，302	COL/D4	635，70	XTB	980，512	Z64Hz	70，722
B4/C4	70，197	B2/C2	745，70	VSS	870，910	S2	70，617
A4/G4	70，70	A2/G2	855，70	IND	762，910
F4/E4	195，70	F2/E2	980，70	DIS	372，910
B3/C3	305，70	BC1/D2	980，197	L	267，910

APPLICATION DIAGRAM

Note:

1. Z64Hz, T1 for IC internal testing feet, without bond;

2. The substrate VDD.

3. The resistor R1 = 10 k; Resistance R2, R3 = 1 = 1 ~ 4.7 K ~ 4.7 K

to choose according to the EL brightness and current requirement.

4. L: 1.8 ~ 3.5 mH/Ω 17 to 30, according to EL light-emitting chip area.

Note: since three and a half watch LCD display is small,

so the use of EL light-emitting area is small,

So the inductance L and the value of R2, R3, please choose according to actual size,

Otherwise easy to cause light interference with LCD display.

Of linear and external components of EL, please stay away from crystals,

it is best to GND line isolation.