U4255BM-MFN

U4255BM-MFN Datasheet

The U4255BM-M is a highly integrated AM/FM front-end circuit manufactured using Atmel’s advanced BICMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = 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.

Part	Datasheet
U4255BM-MFN	U4255BM-MFN (pdf)

Related Parts	Information
U4255BM-MFNG3	U4255BM-MFNG3

PDF Datasheet Preview
• 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. The U4255BM-M is a highly integrated AM/FM front-end circuit manufactured using Atmel’s advanced BICMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = 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. AM/FM Receiver IC U4255BM-M Pin Configuration Figure Pinning SSO44 44 MX1OB 43 MX1OA 42 VS 41 MX1AMA 40 MULTIP 39 IF1REF 38 IF1FMI 37 FILADJ 36 IFAGCL 35 IFAGCH 34 SMUTE 33 IF1AMI 32 OPLPF 31 DEV 30 IF1OUT 29 V3 28 IF2IN 27 V3P 26 MX2IN 25 GND 24 MX2OA 23 MX2OB MX1FMA 1 MX1FMB 2 MX1AMB 3 GNDMX 4 FMAGC 5 AMVREG 6 AMAGC 7 AMPLPF 8 METER 9 ADJAC 10 MPX 11 V57 12 OSCB 13 OSCE 14 GNDOSC 15 OSCOUT 16 EN 17 CLK 18 DATA 19 IF2OUT 20 INT 21 MX2LO 22 Pin Description MX1FMA MX1FMB MX1AMB GNDMX FMAGC AMVREG AMAGC AMPLPF METER ADJAC OSCB OSCE GNDOSC OSCOUT DATA IF2OUT MX2LO MX2OB MX2OA MX2IN IF2IN IF1OUT OPLPF IF1AMI SMUTE IFAGCH IFAGCL Ordering Information Extended Type Number U4255BM-MFN U4255BM-MFNG3 Package SSO44 Package Information Package SSO44 Dimensions in mm Remarks Tube Taped and reeled technical drawings according to DIN specifications Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 441-0311 FAX 1 408 487-2600 Europe Atmel SarL Route des Arsenaux 41 Casa Postale 80 CH-1705 Fribourg Switzerland TEL 41 26-426-5555 FAX 41 26-426-5500 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369 Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Atmel Operations Memory Atmel Corporate 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 436-4270 FAX 1 408 436-4314 Microcontrollers Atmel Corporate 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 436-4270 FAX 1 408 436-4314 Atmel Nantes La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL 33 2-40-18-18-18 FAX 33 2-40-18-19-60 ASIC/ASSP/Smart Cards Atmel Rousset Zone Industrielle 13106 Rousset Cedex, France TEL 33 4-42-53-60-00 FAX 33 4-42-53-60-01 Atmel Colorado Springs 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1 719 576-3300 FAX 1 719 540-1759 Atmel Smart Card ICs Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland TEL 44 1355-803-000 FAX 44 1355-242-743 RF/Automotive Atmel Heilbronn Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL 49 71-31-67-0 FAX 49 71-31-67-2340 Atmel Colorado Springs 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1 719 576-3300 FAX 1 719 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Atmel Grenoble Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France TEL 33 4-76-58-30-00 FAX 33 4-76-58-34-80 e-mail Web Site Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. is the registered trademark of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• 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.

The U4255BM-M is a highly integrated AM/FM front-end circuit manufactured using Atmel’s advanced BICMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = 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.

AM/FM Receiver IC U4255BM-M

Pin Configuration

Figure Pinning SSO44
44 MX1OB 43 MX1OA 42 VS 41 MX1AMA 40 MULTIP 39 IF1REF 38 IF1FMI 37 FILADJ 36 IFAGCL 35 IFAGCH 34 SMUTE 33 IF1AMI 32 OPLPF 31 DEV 30 IF1OUT 29 V3 28 IF2IN 27 V3P 26 MX2IN 25 GND 24 MX2OA 23 MX2OB

MX1FMA 1 MX1FMB 2 MX1AMB 3 GNDMX 4

FMAGC 5 AMVREG 6

AMAGC 7 AMPLPF 8 METER 9

ADJAC 10 MPX 11 V57 12

OSCB 13 OSCE 14 GNDOSC 15 OSCOUT 16

EN 17 CLK 18 DATA 19 IF2OUT 20 INT 21 MX2LO 22

Pin Description

MX1FMA

MX1FMB

MX1AMB

GNDMX

FMAGC

AMVREG

AMAGC

AMPLPF

METER

ADJAC

OSCB

OSCE

GNDOSC

OSCOUT

DATA

IF2OUT

MX2LO

MX2OB

MX2OA

MX2IN

IF2IN

IF1OUT

OPLPF

IF1AMI

SMUTE

IFAGCH

IFAGCL
Ordering Information

Extended Type Number U4255BM-MFN U4255BM-MFNG3

Package SSO44

Package Information

Package SSO44

Dimensions in mm

Remarks Tube Taped and reeled
technical drawings according to DIN specifications

Atmel Headquarters

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 441-0311 FAX 1 408 487-2600

Europe Atmel SarL Route des Arsenaux 41 Casa Postale 80 CH-1705 Fribourg Switzerland TEL 41 26-426-5555 FAX 41 26-426-5500

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369

Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Atmel Operations

Memory Atmel Corporate 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 436-4270 FAX 1 408 436-4314

Microcontrollers Atmel Corporate 2325 Orchard Parkway San Jose, CA 95131 TEL 1 408 436-4270 FAX 1 408 436-4314

Atmel Nantes La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL 33 2-40-18-18-18 FAX 33 2-40-18-19-60

ASIC/ASSP/Smart Cards Atmel Rousset Zone Industrielle 13106 Rousset Cedex, France TEL 33 4-42-53-60-00 FAX 33 4-42-53-60-01

Atmel Colorado Springs 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1 719 576-3300 FAX 1 719 540-1759

Atmel Smart Card ICs Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland TEL 44 1355-803-000 FAX 44 1355-242-743

RF/Automotive Atmel Heilbronn Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL 49 71-31-67-0 FAX 49 71-31-67-2340

Atmel Colorado Springs 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1 719 576-3300 FAX 1 719 540-1759

Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom

Atmel Grenoble Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France TEL 33 4-76-58-30-00 FAX 33 4-76-58-34-80
e-mail

Web Site

Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.
is the registered trademark of Atmel.

Other terms and product names may be the trademarks of others.

Printed on recycled paper.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived U4255BM-MFN Datasheet file may be downloaded here without warranties.

Datasheet ID: U4255BM-MFN 519495