CYF4455

The CYF4455 is a high performance ASK/OOK 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 .3V /+14dBm / 12.5mA
 Low supply voltage, 2.2V to 3.6V 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
 SOT23-6 package

APPLICATIONS:
 Keyless entry systems
 Remote control systems
 Garage door openers
 Alarm systems
 Security systems
 Wireless sensors