U2741B-NFB

U2741B-NFB Datasheet

U2741B

Part	Datasheet
U2741B-NFB	U2741B-NFB (pdf)

Related Parts	Information
U2741B-NFBY	U2741B-NFBY
U2741B-NFBG3	U2741B-NFBG3
U2741B-NFBG3Y	U2741B-NFBG3Y

PDF Datasheet Preview
• Very High Transmitting Frequency Accuracy Compared to SAW Solutions Enables Receivers at Lower Bandwidth than with SAW Resonators • Lower Cost than the Usual Discrete Solutions Using SAW and Transistors • Supply Voltage V to V in the Temperature Range -20°C to 70°C Supply Voltage V to V in the Temperature Range -40°C to 85°C • XTO Output for Clocking the Microcontroller, Thereby Together with the ATAR090 or ATAR890 Results in the Optimum System Cost-effectiveness • One-chip Solution with Minimum External Circuitry • Very Small SSO16 Package, Pitch 150 mil • “Single-ended Open-collector” Output Same Antennas as in Discrete Solutions Can Be Used, Simpler Adaptation of Magnetic Loop Antennas • Very Large FSK Frequency Deviation Achievable by ±100 ppm Pulling of the Reference Crystal • Enables Receivers at Lower Bandwidth than with SAW Resonators • ESD Protection According to MIL-STD.883 4 KV HBM Except Pins XTO1/ 2, ANT and LF UHF ASK/FSK Transmitter U2741B Electrostatic sensitive device. Observe precautions for handling. The U2741B is a PLL transmitter IC which has been especially developed for the demands of RF low-cost data transmission systems at data rates up to 20 kBaud. The transmitting frequency range is 300 MHz to 450 MHz. The device can be used in both FSK and ASK systems. Microcontroller Figure System Block Diagram 1 Li cell Encoder Keys ATARx9x UHF ASK/FSK Remote control transmitter UHF ASK/FSK Remote control receiver U2741B U3741BM Demod. Control PLL VCO Antenna IF Amp PLL Power amp. Figure Block Diagram ASK FSK VCC CLK GND LFVCC LFGND Power up U2741B PA XTO DIVC PWRSET PWRVCC ANT PWRGND1 PWRGND2 XTO1 XTO2 2 U2741B Pin Configuration Figure Pinning SSO16 ASK 1 FSK 2 VCC 3 CLK 4 GND 5 LFVCC 6 LFGND 7 U2741B 16 DIVIC 15 PWRSET 14 PWRVCC 13 ANT 12 PWRGND1 11 PWRGND2 10 XTO1 9 XTO2 Pin Description LFVCC LFGND XTO2 Ordering Information Extended Type Number U2741B-NFB U2741B-NFBG3 Package Information Package SSO16 Remarks Tube, optimized power-supply rejection, value of C4 differs from M-version, enhanced XTO stability Taped and reeled, see above 8 U2741B Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 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 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 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 Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80 Literature Requests Disclaimer 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. Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• Very High Transmitting Frequency Accuracy Compared to SAW Solutions Enables Receivers at Lower Bandwidth than with SAW Resonators
• Lower Cost than the Usual Discrete Solutions Using SAW and Transistors
• Supply Voltage V to V in the Temperature Range -20°C to 70°C

Supply Voltage V to V in the Temperature Range -40°C to 85°C
• XTO Output for Clocking the Microcontroller, Thereby Together with the ATAR090 or

ATAR890 Results in the Optimum System Cost-effectiveness
• One-chip Solution with Minimum External Circuitry
• Very Small SSO16 Package, Pitch 150 mil
• “Single-ended Open-collector” Output Same Antennas as in Discrete Solutions Can

Be Used, Simpler Adaptation of Magnetic Loop Antennas
• Very Large FSK Frequency Deviation Achievable by ±100 ppm Pulling of the Reference

Crystal
• Enables Receivers at Lower Bandwidth than with SAW Resonators
• ESD Protection According to MIL-STD.883 4 KV HBM Except Pins XTO1/ 2,

ANT and LF

UHF ASK/FSK Transmitter

U2741B

Electrostatic sensitive device. Observe precautions for handling.

The U2741B is a PLL transmitter IC which has been especially developed for the demands of RF low-cost data transmission systems at data rates up to 20 kBaud. The transmitting frequency range is 300 MHz to 450 MHz. The device can be used in both FSK and ASK systems.

Microcontroller

Figure System Block Diagram
1 Li cell

Encoder Keys ATARx9x

UHF ASK/FSK Remote control transmitter

UHF ASK/FSK Remote control receiver

U2741B

U3741BM

Demod.

Control

PLL VCO

Antenna

IF Amp PLL

Power amp.

Figure Block Diagram

ASK FSK VCC CLK GND LFVCC LFGND

Power up

U2741B

PA XTO

DIVC PWRSET PWRVCC ANT PWRGND1 PWRGND2 XTO1 XTO2
2 U2741B

Pin Configuration

Figure Pinning SSO16

ASK 1 FSK 2 VCC 3 CLK 4 GND 5 LFVCC 6 LFGND 7

U2741B
16 DIVIC 15 PWRSET 14 PWRVCC 13 ANT 12 PWRGND1 11 PWRGND2 10 XTO1 9 XTO2

Pin Description

LFVCC

LFGND

XTO2
Ordering Information

Extended Type Number U2741B-NFB U2741B-NFBG3

Package Information

Package SSO16

Remarks

Tube, optimized power-supply rejection, value of C4 differs from M-version, enhanced XTO stability

Taped and reeled, see above
8 U2741B

Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600

Regional Headquarters

Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500

Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369

Japan 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 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

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 Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743

RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

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

Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80

Literature Requests

Disclaimer 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.

Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. 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 U2741B-NFB Datasheet file may be downloaded here without warranties.

Datasheet ID: U2741B-NFB 519470