99 minutes and 59 seconds countdown

V2008

FUNCTIONS

* digit countdown/up timer;

*It can directiy drive LCD; 

*Maximum countdown time is 99:59 Minutes; 

*Bonding option is for alarm time 32 or 64 seconds;

*Bonding option is for up/down or just down function.

FEATURES

*Internal voltage doubler;

*32,768Hz quartz crystal time base; 

*Minutes and Seconds set independently;

*Direct drive buzzer; 

*Low power dissipation; 

*Protection against static discharge. 

ELECTRICAL CHARACTERISTICS

Characteristics	Sym	Min	Typ	Max	Unit	REMARKS
Operating Voltage	Vdd	1.2	1.5	2	V	-
Quiescent Current	Isb	-	1	2	µA	No Load
Operating Current	Iop	-	-	9	µA	-
Input high voltage	Vih	Vdd-0.3	-	Vdd	V	-
Input low voltage	Vil	Vss	-	Vss+0.3	V	-
Switch activation current	Isw	-	-	3	µA	Vin=Vdd
Alarm drive cuurrent	Iala	0.5	2	-	mA	Vala=0.5V
Oscillator input Frequency	Fosc	-	32768	-	Hz	±30%Tol
LCD frequency	Flcd	-	32	-	Hz	-
Time stability	Tstb	-	1	-	ppm	Vdd=3V

Bonding option:

FUNCTION DESCRIPTION

The timing mode:

* add electric LCD display is prefer;

* SSET, MSET key set time, time setting in the initial model and only effective

counter to stop or reset condition. Independently with press the two key points,

the second set, the colon shows but not flashing;

* press the SSET with MSET button at the same time, the counter is reset to 00:00;

Timing starts * time setting and trigger the START button, the colon START flashing.

* in the process of the timer, press any key to stop time, press the MSET key or SSET key at this time,

the current time is preset time, the colon shows but not flashing at this time.

Counter in time setting state, trigger START key timing starts time setting state.

* the end of the timing, LCD display for 00:00 and colon but not flashing, the rings at beginning

(rings at 32 seconds or 64 seconds long);

* the end of the timing, and rings at the end, the LCD display the preset time.

(if is to press the START key rings at stop, LCD display preset time;

If it is according to the SSET or MSET key rings at stop, LCD display to 00:00,

then press the START button LCD display preset time.)

Is the timing mode:

* is timing mode only when reset or power up haven't set a time effectively,

to trigger the START button and START the time.

* time is after the start timing cycle timing to 99;

* is in the process of the timing, press any key to stop time,

at this time to trigger the START time key to continue;

* is timing mode, press any key to stop, then press MSET and SSET set the timing time,

timer transform to the timing mode.

LCD field distribution

	SEG8	SEG7	SEG6	SEG5	SEG4	SEG3	SEG2	SEG1
COM1	A1	B1	A2	B2	A3	B3	A4	B4
COM2	F1	G1	F2	G2	F3	G3	F4	G4
COM3	E1	C1	E2	C2	E3	C3	E4	C4
COM4		D1		D2	COLON	D3		D4

glyph LCD display

APPLICATION INFORMATION

Pad	Name	X	Y	Pad	Name	X	Y
1	COM1	69.5	66.5	15	OSCO	1229.5	366
2	GND	69.5	215.4	16	OSCI	1229.5	261
3	OPT3	69.5	320.4	17	COM3	1229.5	66.5
4	CAP2	69.5	425.4	18	COM4	1122	66.5
5	CAP1	69.5	681.4	19	S8	1017	66.5
6	Sset	384.2	793.5	20	S7	912	66.5
7	Mset	489.2	793.5	21	S6	807	66.5
8	START	594.2	793.5	22	S5	702	66.5
9	OPT1	699.2	793.5	23	S4	597	66.5
10	VDD	804.2	793.5	24	S3	492	66.5
11	BZ	1229.5	791.5	25	S2	387	66.5
12	BZB	1229.5	681	26	S1	282	66.5
13	VSS	1229.5	576	27	COM2	177	66.5
14	OPT2	1229.5	471	28

APPLICATION DIAGRAM

* chip left corner as the origin, the X and Y coordinates for PAD center;

* VDD chip substrate.