Preliminary
PT4452
PLL-based OOK/ASK/FSK Transmitter IC
DESCRIPTION
PT4452 is a high performance OOK/ASK/FSK
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 controls the phase-locked loop and power
amplifier to have fast start-up time in operation.
FEATURES
•
•
•
•
•
Highly integrated OOK/ASK/FSK transmitter
High output power, 3 V /+12 dBm /27 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
•
SOP8 package
APPLICATIONS
•
•
•
•
•
•
Keyless entry systems
Remote control systems
Garage door openers
Alarm systems
Security systems
Wireless sensors
BLOCK DIAGRAM
PAOUT
VSSPA
DIN
VDD
8
PA
7
Vreg
6
Oneshot
5
PLL
1
2
3
4
MODSEL
XOUT
XIN
CE
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PTC [ PRINCETON TECHNOLOGY CORP ]
