HT7610 查看數據表（PDF） - Holtek Semiconductor

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HT7610

General Purpose PIR Controller

Holtek Semiconductor 

HT761X

MODE

MODE is a tri-state input pin used to select the

operating mode.

MODE Operating

Status Mode

Description

VDD

Output is always ON:

RELAY outputs high for

ON

relay driving.

TRIAC pulse train output

is synchronized by ZC for

triac driving.

VSS

OFF

Output is always OFF:

RELAY outputs low for

relay driving.

TRIAC outputs high for

triac driving.

Open

AUTO

Outputs remain in the off

state until activated by a

valid PIR input trigger

signal. When working in

the AUTO mode, the chip

allows override control by

switching the ZC signal.

ZC

ZC is a CMOS input structure. It receives AC

line frequency and generates zero crossing

pulses to synchronize the triac driver. By effec-

tive ZC signal switching (switch OFF/ON 1 or 2

times within 3 seconds by mask option), the

chip provides the following additional func-

tions:

• Test mode control

Within 10 seconds after power-on, effective

ZC switching will force the chip to enter the

test mode. During the test mode, the outputs

will be active for a duration of 2 seconds each

time a valid PIR trigger signal is received. If

a time interval exceeds 32 seconds without a

valid trigger input, the chip will enter the

AUTO mode automatically.

7

24th Mar ’97

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