PT4455

PLL-based OOK/ASK Transmitter IC

Tel: 886-2-66296288

‧Fax: 886-2-29174598‧http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan

DESCRIPTION

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

 Keyless entry systems

 Remote control systems

 Garage door openers

 Alarm systems

 Security systems

 Wireless sensors

FEATURES

 Highly integrated OOK/ASK transmitter

 High output power, 3V /+11dBm /17mA

 Low supply voltage, 2.2V to 3.6V operation range

 Low external component cost.

 PLL-based transmitter with frequency range from

300MHz to 450MHz

 On-chip one-shot circuit

 60dB RF on-off ratio for OOK/ASK modulation

 Available in 6-pin, SOT-23 package

BLOCK DIAGRAM

Vreg

Oneshot

1

6

5

4

3

2

PA

VSS

DIN

VDD

XOUT

XIN

PAOUT

P

L

L