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參數資料
| 型號： | HT761X |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | General Purpose PIR Controller |
| 中文描述： | 通用紅外控制器 |
| 文件頁數： | 8/12頁 |
| 文件大小： | 688K |
| 代理商： | HT761X |
RSTB
RSTB is used to reset the chip. It is internal
pull-high and active low.
The use of C
RST
can extend the power-on initial
time. If the RSTB pin is an open circuit (without
C
RST
), the initial time is the default (40 secs).
Power on initial
The PIR signal amplifier requires a warm up
period after power-on. The input should be dis-
abled during this period.
In the AUTO mode within the first 10 seconds
of power-on initialization, the chip allows over-
ride control to enter the test mode. After 40
seconds of the initial time the chip allows over-
ride control between ON and AUTO. It will
remain in the warm up period if the total initial
time has not elapsed after returning to AUTO.
In case that the ZC signal disappears more than
3 seconds, the chip will restart the initialization
operation. However, the restart initial time is
always 40 seconds and cannot be extended by
adding C
RST
to the RSTB pin as shown in Fig.4.
Fig.3 ZC override timing
Override control
When the chip is working in the AUTO mode
(MODE =open), the output is activated by a
valid PIR trigger signal and the output active
duration is controlled by the OSCD oscillating
period. The lamp can be switched always to
“ON” from the AUTO mode by either switch-
ing the MODE pin to VDD or switching the ZC
signal by an OFF/ON operation of the power
switch (OFF/ON once or twice within 3 sec-
onds by mask option). The term "override"
refers to the change of operating mode by
switching the power switch. The chip can be
toggled from ON to AUTO by an override op-
eration. If the chip is overridden to ON and
there is no further override operation, it will
return to AUTO automatically after an inter-
nal preset ON time duration has elapsed. This
override ON time duration can be set to 4 or 6
or 8 hours by mask option. The default is 8
hours.
The chip provides a mask option to decide the
output flash times (3 times) when changing
the operating mode. It will flash 3 times at a
1Hz rate each time the chip changes from the
AUTO mode to another mode or flash 3 times
at a 2Hz rate when returning to the AUTO
mode. But if the AUTO mode is changed by
switching the MODE switch it will not flash.
Fig.4 RSTB application example
HT761X
8
24th Mar ’97
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HT761X_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:General Purpose PIR Controller |
| HT7620A(16DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620A(16SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620B(16DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620B(16SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
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