HT7610 查看數據表（PDF） - Holtek Semiconductor

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HT7610

General Purpose PIR Controller

Holtek Semiconductor 

HT761X

Functional Description

VEE

VEE supplies power to the analog front end

circuit with a stabilized voltage which is –4V

with respect to VDD normally.

OSCS

OSCS is a system oscillator input pin. When it

is connected to an external RC a system fre-

quency of 16KHz can be generated.

Fig.1 System oscillator

OSCD

OSCD is an output timing oscillator input pin.

It’s connected to an external RC to obtain the

desired output turn-on duration. Variable out-

put turn-on durations can be achieved by select-

ing various values of RC or using a variable

resistor.

RELAY (TRIAC)

RELAY is an output pin set as a RELAY driving

(active high) output for the HT761XA, or as a

TRIAC driving (active low) output for the

HT761XB.

The output active duration is controlled by the

OSCD oscillating period.

HT761XA HT761XB

OUTPUT

RELAY

TRIAC

CDS

CDS is a CMOS schmitt trigger input structure.

It is used to distinguish between day time and

night time. When the input voltage of CDS is

high the PIR input is enabled. On the other

hand, when CDS is low the PIR input is dis-

abled. The input disable to enable debounce

time is 5 seconds. Connect this pin to VDD

when not using this function. The CDS input is

ignored when the output is active.

CDS

Status

PIR

LOW

Day Time

Disabled

HIGH

Night

Enabled

TD=

1

f

×

21504

Fig.2 Output timing oscillator

6

24th Mar ’97

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