 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
HT7612 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
|
||||||||||||||||||||||||||||||
HT7612 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
|
|
4 / 18 page  HT7612 Rev. 1.00 4 November 12, 2009 Functional Description The following gives a description of the functional pins on the device. TEST The TEST pin is an output which is used to test the 32 KHz system frequency. Note that the pin is a shared TEST/SC pin. The TEST output pin can be used within 1 second after power-on. SC The SC pin is an output pin which is used to for LVD and CDS detection. Note the pin is a shared TEST/SC pin. The SC pin can be used 1 second after power-on. DT The DT pin is a delay time oscillator input pin. It is con- nected to an external RC to obtain the desired output turn-on duration. Variable output turn-on durations can be achieved by selecting various values of RC or using a variable resistor. The DT structure is shown as Fig.1. BUZ/BUZ The BUZ & BUZ pins are both CMOS output structures. They will output 4 beep sounds within 1second to indi- cate that the warm-up time has completed. These differ- ential output pins can be used to drive a piezo buzzer. The BUZ/BUZ structure are shown in Fig.2. RELAY The RELAY pin is a CMOS output structure which is nor- mally low and active high. The high duration is con- trolled by the delay time oscillator and the MODE pin. The RELAY pin structure is shown in Fig.3. TRIAC TRIAC pin is a CMOS output structure which will output a series of pulses when active. The pulse train synchro- nised by the ZC (zero crossing) input. The active dura- tion is controlled by the delay time oscillator and the MODE pin. The TRIAC structure is shown in Fig.4. V R E F D T S R F F I C o m p C o m p O s c i l l a t o r C L K _ + _ + Fig.1 DT Oscillator Structure B U Z / L V D B U Z / C D S Fig.2 Buzzer Pin Drive Buzzer V D D R E L A Y / L E D 1 0 k W L O A D A C R E L A Y 8 0 5 0 Fig.3 RELAY Pin Drive RELAY T R I A C 1 0 k W L O A D A C T R I A C 0 . 1 m F ~ 0 . 4 7 m F Fig.4 TRIAC Pin Drive TRIAC |
Similar Part No. - HT7612 |
|
Similar Description - HT7612 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
