Maker : Holtek Semiconductor Inc
Part No. : HT761X

  Datasheet PDF : HT761X.pdf
  Cross Reference : HT761X Cross Reference
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Shortcut : HT7610  HT7611  HT7612  HT761X 

Product Information

HT761X General Purpose PIR Controller Features • • • • • • Stand-by current: 100µA (Typ.) On-chip regulator Adjustable output duration CDS input 40 second warm-up ON/AUTO/OFF selectable by MODE pin • • • • Override function Auto-reset if the ZC signal disappears over 3 seconds Operating voltage: 5V~12V 16 pin DIP or SOP packaging Applications • • PIR light controllers Motion detectors • • Alarm systems Auto door bells General Description The HT761X is a CMOS LSI chip designed for use in automatic PIR lamp control. It can operate with a 2-wire configuration for triac applications or with a 3-wire configuration for relay applications. The chip is equipped with operational amplifiers, a comparator, timer, a zero crossing detector, control circuit, a voltage regulator, a system oscillator, and an output timing oscillator. Its PIR sensor detects infrared power variations induced by the motion of a human body and transforms it to a voltage variation. If the PIR output voltage variation conforms to the criteria (refer to the functional description), the lamp is turned on with an adjustable duration. The HT761X offers three operating modes (ON, AUTO, OFF) which can be set through the MODE pin. While the chip is working in the AUTO mode the user can override it and switch to the TEST mode, or manual ON mode, or return to the AUTO mode by switching the power switch. The chip is enclosed in a 16 pin DIP/SOP. Selection Table Part Number ZC off/on for override 2 times 1 time Flash on mode autochange Flash No flash Override ON duration 8 hrs 8 hrs Comparator Effective window trigger width 1 (VDD-VEE) 16 1 (VDD-VEE) 16 >24ms >24ms HT7610 HT7611 1 24th Mar ’97 HT761X Pin Assignment Block Diagram 2 24th Mar ’97 HT761X Pin Description Pin No. A 1 2 2 Pin Name VSS RELAY TRIAC I/O I O O B 1 Internal Connection — CMOS CMOS PMOS IN NMOS OUT Description Negative power supply RELAY drive output through an external NPN transistor, active high TRIAC drive output The output is a pulse output when active. Output timing oscillator I/O It is connected to an external RC to adjust output duration. System oscillator I/O OSCS is connected to an external RC to set the system frequency. The system frequency ≅ 16KHz for normal application. Input for AC zero crossing detection CDS is connected to a CDS voltage divider for daytime/night auto-detection. Low input to this pin can disable the PIR input. CDS a schmitt trigger input with 5-second input debounce time. Operating mode selection input: VDD: Output is always ON VSS: Output is always OFF Open: Auto detection Positive power supply Regulated voltage output The output voltage is about –4V with respect to VDD. Chip reset input, active low Noninverting input of OP1 Inverting input of OP1 Output of OP1 Noninverting input of OP2 Inverting input of OP2 Output of OP2 3 3 OSCD I/O 4 4 OSCS I/O PMOS IN NMOS OUT CMOS 5 5 ZC I 6 6 CDS I CMOS 7 7 MODE I CMOS 8 9 10 11 12 13 14 15 16 8 9 10 11 12 13 14 15 16 VDD VEE RSTB OP1P OP1N OP1O OP2P OP2N OP2O I O I I I O I I O — NMOS Pull-High PMOS PMOS NMOS PMOS PMOS NMOS 3 24th Mar ’97 HT761X Absolute Maximum Ratings Supply Voltage ............................... –0.3V to 13V Input Voltage................. VSS–0.3V to VDD+0.3V Storage Temperature................. –50°C to 125°C Operating Temperature............... –25°C to 75°C Zero Crossing Current.....................max. 300µA Electrical Characteristics Symbol VDD VEE IDD VTH1 VTL1 IOH1 IOL1 IOL2 VIH VIL VTH2 VTL2 FSYS Fd AVO VOS Parameter Operating Voltage Regulator Output Voltage Operating Current CDS “H” Transfer Voltage CDS “L” Transfer Voltage OUTPUT Source Current (RELAY, TRIAC) OUTPUT Sink Current (RELAY, TRIAC) VEE Sink Current “H” Input Voltage “L” Input Voltage ZC “H” Transfer Voltage ZC “L” Transfer Voltage System Oscillator Frequency Delay Oscillator Frequency OP Amp Open Loop Gai...

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