PT4455/RX3310A/PT4450/PT4452/PT4301/PT4302/PT4316/PT4317系列PTC/普诚科技射频芯片,长期有备大货,优势供应！技术支持和采购需求请联系 QQ:648570336  
    
    PT4455(低电压UHF OOK/ASK发射器)。
    PT4455使用晶振作为基频，使得频率偏移可以降至最低。在250~450MHz的操作频带中， 3.0V的工作电压即可输出+10dBm功率，很适合低电压应用。PT4455也是市面上相同方案中外围零件最少者，可以减少PCB所需面积，让终端产品在造型有更多发挥的空间，采用SOT-6封装,跟pt4450比，它有了内置晶振！

----------------------
Decsription
      PT4455 is a high performance OOK/ASK Transmitter for the Remote Keyless Entry (RKE)systems. It consists of a power amplifier, one-shot circuit and phase-locked loop with internal voltage controlled oscillator and loop filter. The one-shot circuit control the phase-locked loop and power amplifier to have fast start-up time in operation.

Features
 Highly integrated OOK/ASK transmitter
 High output power, 3 V /+11 dBm / 17 mA
 Low supply voltage, 2.2 V to 3.6 V operation range
 Low external component cost.
 PLL-based transmitter with frequency range from 250MHz to 450MHz
 On-chip one-shot circuit
 60 dB RF on-off ratio for OOK/ASK modulation

Applications
 Keyless entry systems
 Remote control systems
 Garage door openers
 Alarm systems
 Security systems
 Wireless sensors
-----------------------------​