U4255BM

Features:

FM-double conversion system
Integrated second IF filter with software controlled bandwidth
Completely integrated FM demodulator
Soft mute and multipath noise cancellation
Receiving condition analyzer
AM up/down conversion system
AM preamplifier with AGC and stereo capability
3-wire bus controlled
Stop signal generation for AM and FM
Automatic alignment possible


Pinout




Specifications

Parameters	Symbol	Value	Unit
Supply voltage     Pin 42	VS	10	V
Power dissipation	Ptot	800	mW
Junction temperature	Tj	150	°C
Ambient temperature range	Tamb	40 to +85	°C
Storage temperature range	Tstg	50 to +150	°C

Description

The U4255BM is an integrated AM/FM front end circuit in BICMOS technology. It contains a double conversion system for FM and an up/down conversion circuit for AM (IF1 = 10.7 MHz, IF2 = 450 kHz). A complete automatically aligned high performance AM/FM tuner can be built together with the PLL U4256BM. This ICs are designed for high performance car radio applications.

Electrostatic sensitive U4255BM. Observe precautions for handling.