Preliminary DM1800434MR ® • Network Router • Compatible with RFM miniMESHTM Network Protocol • 3 V, Very Low Current Operation • Ready-to-Use OEM Module The DM1800-434MR is the 433.92 MHz router module in the DM1800 family of RF transceivers. The DM1800 family is designed for adding embedded wireless connectivity to a wide range of monitoring and control systems. This module is compatible with RFM’s miniMESHTM network protocol, which provides add-on “plug- and-play” multicast mesh network routing. Radio communications range in an “open field” environment is typically 200 meters/hop. The DM1800-434MR combines RFM’s very low current ASH radio technology with low power microcontroller technology to achieve long battery life. The DM1800-434MR is designed for operation under ETSI I-ETS 300 220 regulations. 433.92 MHz Transceiver Module Absolute Maximum Ratings Rating Value All Input/Output Pins Except VIN -0.3 to +3.3 Non-Operating Ambient Temperature Range -50 to +100 Units V o C Electrical Characteristics Characteristic Sym Operating Frequency fO Notes Minimum Typical 433.72 Modulation Type Maximum Units 434.12 MHz OOK RF Encoded Data Transmission Rate Average Receiver Input Current, No External Power Supply Load IR -3 Receiver Input Signal for 10 BER, 25 °C Peak Transmitter Input Current, No External Power Supply Load ITP Peak Transmitter Output Power PO Digital In Logic High 4.8 kb/s 4 mA -103 dBm 13.5 1 mW 2.4 V Digital In Logic Low Power Supply Input Voltage Range, -40 to +85 oC o Power Supply Input Voltage Range, 0 to +85 C Regulated Power Supply Output Voltage, VIN 3.1 to 14 V .45 V VIN 3.1 14 V VIN 2.6 14 V VOUT Regulated Power Supply Voltage Ripple 3.0 Vdc 10 1 mA mVP-P D M 1 8 0 0 -4 3 4 M R B lo c k D ia g r a m J 1 -1 0 G N D J 2 -3 J 2 -2 G N D J 2 -1 A S H T r a n s c e iv e r C N T R L 0 J 1 -9 C N T R L 1 J 1 -8 R X D A T A J 1 -7 T X M O D L E D 1 L E D 2 G N D P IC 1 6 F 6 8 8 µ P J 1 -6 J 1 -5 3 V R e g J 1 -4 B IN D J 1 -3 V O U T J 1 -2 V IN J 1 -1 G N D Figure 1 Theory of Operation ing mode. The LEDs can be disabled for low current operation. The major components of the DM1800433.92MR include an RFM TR3000 ASH transceiver and a Microchip PIC16F688 microcontroller. The TR3000 operates on a frequency of 433.92 MHz, at a nominal output power of 1 mW. The DM1800 includes two LEDs that indicate the module’s operat- The DM1800-434MR is compatible with RFM’s miniMESHTM network protocol, which provides add-on “plug-and-play” multicast mesh network routing to improve communication range and robustness. 2 DM1800-434MR I/O Pad Descriptions Pin Name Description J1-1 GND This pad is a signal and power supply ground. J1-2 VIN This is the power supply input pad. The allowed input voltage range is 2.6 to 14 V. J1-3 VOUT VOUT tracks 50 to 100 mV below VIN when VIN is in the range of 2.6 to 3.1 V. When VIN is in the range of 3.1 to 14 V, VOUT is regulated at 3.0 Vdc. Up to 10 mA can be supplied from this pad for powering external circuits such as thermistor-resistor networks. External circuitry must not impress more than 10 mVp-p ripple on the regulated output voltage. J1-4 BIND This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up. When this pin is momentarily grounded (to J1-1 or J1-10, the module is placed into the bind mode, allowing this module to be associated with other modules to form a network. J1-10 GND This pad is a signal and power supply ground. J2-1 GND This pad is a ground for the antenna port. J2-2 ANT This pad is the antenna port. J2-3 GND This pad is a ground for the antenna port. 3 D M 1 8 0 0 -4 3 4 M R I/O P a d L a b e ls G N D S E R IA L T X S E R IA L R X G N D D IG IT A L O U T A N A L O G R F IO IN D IG IT A L IN B IN D G N D V O U T V IN G N D Figure 2 D M 1 8 0 0 -4 3 4 M R S M T M o u n tin g P a tte r n 1 .5 3 5 .0 8 0 .0 5 0 .0 9 0 .0 7 0 T Y P .2 0 0 1 .0 0 0 .1 3 0 .2 0 0 .1 0 0 T Y P .0 9 0 .0 9 5 D im e n s io n s in in c h e s . P C B p lu s c o m p o n e n t h e ig h t is .1 7 0 m a x ; P C B p lu s a n te n n a h e ig h t is 2 .1 5 m a x Figure 3 Note: Specifications subject to change without notice. file: dm1800rj.vp, 2005.11.11 rev 4