PT4455 - Princeton Technology

PT4455 PLL-based OOK/ASK Transmitter

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. APPLICATIONS  Keyles.

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
 SOT23-6 package Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan APPLICATION CIRCUIT PT4455 VDD BILL OF MATERIALS Part 315MHz X1 9.844M R1 10K R2 100K R3 0 R4 0 C1 NC C2 27p C3 1u C4 15p C5 8.2p C6 8.2p.