GENERAL DESCRIPTION
The UAA2062 is a BiCMOS integrated circuit that performs all functions from the antenna to the microcontroller for reception and transmission for both the base station and the handset in a cordless telephone.

FEATURES
RF RX (double superheterodyne FM receiver)
• Integrated Low Noise Amplifier (LNA) with programmable gain and input impedance
• 1st mixer with external filter at 10.7 MHz
• 2nd mixer with external filter at 455 or 450 kHz (depending on country application)
• FM detector including a fully integrated IF limiter, a wide-band PLL and a Received Signal Strength Indicator (RSSI) output
• Carrier Detector (CD) with programmable threshold.

RF TX
• Buffer driving an internal Power Amplifier (PA) with programmable gain
• Narrow-band PLL including VCO
• Data transmission summing operational amplifier.

Synthesizer
• 10.24 or 11.15 MHz crystal reference oscillator (LO2) and reference frequency divider
• Programmable TX VCO with phase detector and frequency divider
• Programmable RX VCO (LO1) with phase detector and frequency divider
• Programmable clock divider with output buffer to drive the microcontroller.

Baseband RX section
• Programmable RX gain
• Expander
• Fully integrated earpiece amplifier with fixed gain.

Baseband TX section
• Microphone amplifier
• Compressor
• Programmable TX gain.

Microcontroller interface
• 3-wire serial interface.

Other features
• Voltage regulator to supply internal PLLs and the microcontroller
• Programmable low-battery detector time multiplexed with RSSI carrier detector.

APPLICATIONS
• World-wide analog cordless telephone set (CT0).