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SX1240

Low Cost Integrated Transmitter IC 434 MHz and 868 MHz Band RF Transmitter

Semtech Corporation 

SX1240

ADVANCED COMMUNICATIONS & SENSING

SX1240 - Low Cost Integrated Transmitter IC

434 MHz and 868 MHz Band RF Transmitter

DATASHEET

GENERAL DESCRIPTION

The SX1240 is an ultra-low-cost, fully integrated FSK or

OOK compatible transmitter suitable for operation in the

418, 434 and 868 MHz licence free ISM bands.

For applications where economy is paramount, the SX1240

may be used without the requirement for configuration via

an MCU. The transmitter is configured for default operation

at a frequency of 433.92 MHz or 868.3 MHz. However, in

conjunction with a microcontroller the communication link

parameters may be re-configured. Including, output power,

modulation format and operating channel.

The SX1240 offers integrated radio performance with cost

efficiency and is suited for worldwide operations in

particular Europe (ETSI EN 300-220-1), North America

(FCC part 15.231).

ORDERING INFORMATION

Part Number Temperature Range Qty. per Reel

SX1240ISTRT -40 °C to +85 °C

2500

Package

SOIC8-EP

Pb-Free, Halogen Free, RoHS/WEEE compliant product.

APPLICATIONS

Š Low-Cost Consumer Electronic Applications

Š Remote Keyless Entry (RKE)

Š Remote Control / Security Systems

Š Audio Accessories

Š Process and building / home control

Š Active RFID

KEY PRODUCT FEATURES

Š +10 dBm or 0 dBm Configurable output power

Š Bit rates up to 100 kbps

Š FSK and OOK modulation

Š 2 Preconfigured Modes for Operation without MCU

433.92 MHz OOK & 868.3 MHz FSK

Š 1.8 to 3.7 V supply range

Š Low BOM Fully Integrated Tx

Š 8 Selectable Centre Frequencies

Š Programmable Frequency Tuning of low cost XTAL

SX1240, Rev 1, Oct 2010

©2010 Semtech Corp.

Page 1

www.semtech.com

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