U4255BM-M

Manufacturer Part NumberU4255BM-M
DescriptionAM-FM Receiver IC U4255BM-M
ManufacturerATMEL Corporation
U4255BM-M datasheet
 
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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
Search Stop Signal Generation for AM and FM
Automatic Alignment Possible
Electrostatic sensitive device.
Observe precautions for handling.
Description
The U4255BM-M is a highly integrated AM/FM front-end circuit manufactured using
Atmel’s advanced BICMOS technology. It represents a complete, automatically adjust-
able AM/FM front end, containing a double-conversion system for FM and an
up/down-conversion receiver for AM with IF1 = 10.7 MHz and IF2 = 450 kHz. The
front end is suitable for digital or analog AF-signal processing. Together with the PLL
U4256BM, an automatically aligned high-performance AM/FM tuner can be built.
These ICs are dedicated for highly sophisticated car radio applications.
Pin Configuration
Figure 1. Pinning SSO44
AM/FM
Receiver IC
U4255BM-M
Preliminary
Rev. 4519C–AUDR–07/02
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U4255BM-M Summary of contents