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Princeton Technology

PT4455 Datasheet Preview

PT4455 Datasheet

PLL-based OOK/ASK Transmitter

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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
BLOCK DIAGRAM
Preliminary PT4455
PLL-based OOK/ASK Transmitter IC
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: 886-66296288Fax: 886-29174598http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan




Princeton Technology

PT4455 Datasheet Preview

PT4455 Datasheet

PLL-based OOK/ASK Transmitter

No Preview Available !

APPLICATION CIRCUIT
PT4455
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
C7 2.2u
L1 47n
L2 39n
Value
433.92MHz
13.56M
10K
100K
0
0
NC
39p
1u
22p
6.8p
8.2p
2.2u
39n
27n
Notes:
1. C1/C2 can be used to trim the transmitted signal frequency for matching the specified value.
2. L2/C5/C6 value will depend on PCB layout.
Unit
Hz
F
F
F
F
F
F
F
H
H
PRE1.1
2 August 2010


Part Number PT4455
Description PLL-based OOK/ASK Transmitter
Maker Princeton Technology
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PT4455 Datasheet PDF






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