PT2271A-M4 PT2271A PT2270-S PT2270-M6S PT2270-M4S PT2270-M4 PT2270-M3 PT2270-M2 PT2270-L4S PT2270-L4PT2272 M4
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PT2272是一款用以解码的芯片,编码芯片PT2262发出的编码信号由:地址码、数据码、同步码组成一个完整的码字,解码芯片PT2272接收到信号后,其地址码经过两次比较核对后,VT脚才输出高电平,与此同时相应的数据脚也输出高电平,如果发送端一直按住按键,编码芯片也会连续发射。当发射机没有按键按下时,PT2262不接通电源,其17脚为低电平,所以315MHz的高频发射电路不工作,当有按键按下时,PT2262得电工作,其第17脚输出经调制的串行数据信号,当17脚为高电平期间315MHz的高频发射电路起振并发射等幅高频信号,当17脚为低平期间315MHz的高频发射电路停止振荡,所以高频发射电路完全收控于PT2262的17脚输出的数字信号,从而对高频电路完成幅度键控(ASK调制)相当于调制度为100%的调幅。
PT2272 is a remote control decoder paired with PT 2262 utilizing CMOS
Technology. It has 12 bits of tri-state address pins providing a maximum of
531,441 (or 312) address codes; thereby, drastically reducing any code collision
and unauthorized code scanning possibilities. PT 2272 is available in several
options to suit every application need : variable number of data output pins, latch or momentary output type.
