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Catalog Datasheet	MFG & Type	Document Tags	PDF
HT2820 Abstract: 32725 C 32725 3 machine gun sound generator HT2820E Bell Sound Generator circuit diagram door bell ic HT2821A tone generator ic CMOS LSI two sound generator Text: HT2821 Dual Sound Generator Features • • • • • • • • Single power supply: 2.4V~3.3V Low standby current: 1µA Typ. at VDD=3V Auto power-off function Two sections triggered by 2 input keys Built-in envelope control circuit Minimum external components	Original	HT2821 HT2821 HT2821A HT2820 32725 C 32725 3 machine gun sound generator HT2820E Bell Sound Generator circuit diagram door bell ic tone generator ic CMOS LSI two sound generator	PDF
ht2820 Abstract: pir sensor SD622 sd622 circuit diagram of door BELL HT7630 SENSOR DOOR BELL PIR SD622 HT282 PIR human motion DETECTOR CIRCUIT DIAGRAM on ic 4148 details Text: HT7630 DC PIR Controller Features • • • • Low stand-by current : <30µA Operating voltage : 5V~12V On-chip regulator 40 seconds warm-up • • • • Low battery detector 2 stage OP amp Multi-function indicator 16 pin DIP/SOP package • Door bell	Original	HT7630 HT2820 ht2820 pir sensor SD622 sd622 circuit diagram of door BELL HT7630 SENSOR DOOR BELL PIR SD622 HT282 PIR human motion DETECTOR CIRCUIT DIAGRAM on ic 4148 details	PDF
ht2820 Abstract: door bell UM IC holtek sound gen HT282 3 machine gun sound generator Text: HOLTEK r r HT2821 Dual Sound Generator Features • • • • • • • • Single power supply: 2.4V~3.3V Low stan db y current: l\|iA Typ. a t V dd =3V Auto power-off function Two sections triggered by 2 in pu t keys Built-in envelope control circuit	OCR Scan	HT2821 T2821 HT2821A 100ft 128kHz HT2820E HT2821 560kQ HT2821E ht2820 door bell UM IC holtek sound gen HT282 3 machine gun sound generator	PDF
TRANSISTOR C 32725 w Abstract: ht2820 OSC21 100C HT2821 HT2821A circuit of piezo in LED flash door bell ic C 32725 transistor 8050 Text: HOLTEK r r HT2821 Dual Sound Generator Features • • • • • • • • Single power supply: 2.4V~3.3V Low stan db y current: l\|iA Typ. a t V dd =3V Auto power-off function Two sections triggered by 2 in pu t keys Built-in envelope control circuit	OCR Scan	HT2821 HT2821 HT2821A 128kHz HT2820E TRANSISTOR C 32725 w ht2820 OSC21 100C HT2821A circuit of piezo in LED flash door bell ic C 32725 transistor 8050	PDF