DESCRIPTION

The PT4308 is a compact, fully integrated OOK／ASK

receiver with ±4 KV ESD （HBM）

protection for 433.92 MHz

frequency band and requires few external components.

The PT4308 consists of a low-noise amplifier （LNA）, an

image-rejection mixer （IRM）, a built-in channel-select filter

（CSF）, an OOK／ASK demodulator, a data filter, and a

data slicing comparator. The local oscillator （LO） sub

system incorporates a monolithic VCO, a ÷32 feedback

divider, a loop filter and a fast start-up reference oscillator

to form a complete phase-locked loop-based frequency

synthesizer for single channel applications.

The PT4308 is available in an 8-pin SOP package and is

specified over the temperature range from –40 to +85 °C

 

FEATURES

 Normal operating of 4.3 mA at 433.92 MHz

 Requires few external components

 Achieves sensitivity of –114 dBm （peak ASK

signal level）

 Supply voltage range: 2.1 to 5.5 V

 Supports data rates up to 10 Kb／s

 Wide input dynamic range with automatic gain

control handling

 Image-rejection ratio of 25 dB

 ESD protection level up to ±4 KV for HBM, ±400

V for MM and ±1 KV for CDM

 

APPLICATIONS

 Automotive Remote Keyless Entry （RKE）

 Remote control

 Garage door and gate openers

 Suitable for applications that must adhere to either

the European ETSI-300-220 or the North American

FCC（Part 15）regulatory standards