SX1240 ADVANCED COMMUNICATIONS & SENSING DATASHEET SX1240 - Low Cost Integrated Transmitter IC 434 MHz and 868 MHz Band RF Transmitter GENERAL DESCRIPTION APPLICATIONS The SX1240 is an ultra-low-cost, fully integrated FSK or Low-Cost Consumer Electronic Applications OOK compatible transmitter suitable for operation in the 418, 434 and 868 MHz licence free ISM bands. Remote Keyless Entry (RKE) For applications where economy is paramount, the SX1240 Remote Control / Security Systems may be used without the requirement for configuration via Audio Accessories an MCU. The transmitter is configured for default operation at a frequency of 433.92 MHz or 868.3 MHz. However, in Process and building / home control conjunction with a microcontroller the communication link Active RFID parameters may be re-configured. Including, output power, modulation format and operating channel. KEY PRODUCT FEATURES The SX1240 offers integrated radio performance with cost efficiency and is suited for worldwide operations in +10 dBm or 0 dBm Configurable output power particular Europe (ETSI EN 300-220-1), North America Bit rates up to 100 kbps (FCC part 15.231). FSK and OOK modulation ORDERING INFORMATION 2 Preconfigured Modes for Operation without MCU 433.92 MHz OOK & 868.3 MHz FSK Part Number Temperature Range Qty. per Reel Package 1.8 to 3.7 V supply range SX1240ISTRT -40 C to +85 C 2500 SOIC8-EP Low BOM Fully Integrated Tx 8 Selectable Centre Frequencies Pb-Free, Halogen Free, RoHS/WEEE compliant product. Programmable Frequency Tuning of low cost XTAL SX1240, Rev 1, Oct 2010 Page 1 www.semtech.com 2010 Semtech Corp.SX1240 ADVANCED COMMUNICATIONS & SENSING DATASHEET Table of contents Section Page 1. General Description ................................................................................................................................................. 3 1.1. Pin Diagram ..................................................................................................................................................... 3 1.2. Marking Diagram.............................................................................................................................................. 4 1.3. Pin Description................................................................................................................................................. 4 2. Electrical Characteristics ......................................................................................................................................... 5 2.1. ESD Notice ...................................................................................................................................................... 5 2.2. Absolute Maximum Ratings ............................................................................................................................. 5 2.3. Operating Range.............................................................................................................................................. 5 2.4. Electrical Specifications 6 2.5. Timing Characteristics ..................................................................................................................................... 7 3. Application Modes ................................................................................................................................................... 8 3.1. Application Mode: Power & Go 9 3.1.1. Power & Go Mode: Configuration............................................................................................................ 9 3.1.2. Transmitter Operation in Power & Go Mode ........................................................................................... 9 3.2. Application Mode: Advanced ......................................................................................................................... 10 3.2.1. Advanced Mode: Configuration............................................................................................................... 10 3.2.2. Transmitter Operation in Advanced Mode .............................................................................................. 11 4. Configuration Register........................................................................................................................................... 13 5. Application Information .......................................................................................................................................... 14 5.1. Crystal Specification...................................................................................................................................... 14 5.2. Reference Design Schematics....................................................................................................................... 14 5.3. Reference Design PCB Layout 15 5.4. Reference Design BOM 16 6. Packaging Information........................................................................................................................................... 17 6.1. Package Outline Drawing .............................................................................................................................. 17 6.2. Land Pattern .................................................................................................................................................. 17 6.3. Tape & Reel Specification.............................................................................................................................. 18 7. Revision History..................................................................................................................................................... 19 SX1240, Rev 1, Oct 2010 Page 2 www.semtech.com 2010 Semtech Corp.