FM Radio Transmitter & Receiver Modules T5 / R5 Features MINIATURE SIL PACKAGE FULLY SHIELDED DATA RATES UP TO 128KBITS/S RANGE UPTO 300 METRES SINGLE SUPPLY VOLTAGE INDUSTRY PIN COMPATIBLE QFMR5-434 QFMT5-434 HIGH SENSITIVTY TEMP RANGE -20C to +55C ANALLOUGE, DIGITAL OUTPUTS NO ADJUSTABLE COMPONENTS SIGNAL STRENGTH OUTPUT (RSSI) ON BOARD AGC GOOD SHOCK RESISTANCE SINGLE CONVERSION FM SUPER-HET TEMPERATURE COMPENSATED RF DOUBLE RF FILTERING (INC. SAW FRONT OUTPUT END) Applications VEHICLE ALARM SYSTEMS REMOTE GATE CONTROLS GARAGE DOOR OPENERS DOMESTIC AND COMMERCIAL SECURITY General Description Because of its small size and low power The QFMT5 and QFMR5 data link modules are requirements, these modules are ideal for use in miniature UHF radio modules, which enable the portable battery powered wireless applications. implementation of a simple telemetry link upto 300 metres, and at data rates of up to 128Kbit/s The QFMT5 and QFMR5 modules will suit one-to- one and multi-node wireless links in applications including building and car security, remote industrial process monitoring and computer networking. DS305 2 April 01 2001 REG No 277 4001, England. Page 1FM Radio Transmitter & Receiver Modules T5 / R5 Connection Diagram T5 Quasar R 5 1 2 3 4 5 1 2 3 4 5 6 7 Figure 1: Transmitter Figure 2: Receiver Pin Description: RF GND (pin 1) RF IN (pin 1) RF ground pin, internally connected to pin 4 (0V). 50 RF input from antenna, connect using This pin should ideally be connected to the shortest possible route. This input is isolated from nearest ground plane (e.g. coax braid, main PCB the internal circuit using the air gap of the front ground plane etc.) end SAW RF filter RF OUT (pin2) RF GND (pin 2) 50 RF antenna output. To achieve best results RF ground connection, preferable connected to a the antenna impedance must match that of the solid plane. module. RSSI (pin 3) V (pin 3) CC The Received Signal Strength Indicator provides a +Ve supply pin (3.0 to 9.0 volts). The module will DC output voltage proportional to the RF input generate RF when V is present. It is strongly CC signal. The amplitude of the RSSI voltage recommended that a 100nF capacitor decouples increases with increasing RF signal strength. the supply rail as close as possible to this pin. GND (pin 4) GND (pin 4) Connect to power supply ground. Supply and data ground connection, connected to pin 1. V (pin 5) CC +Ve supply pin. Operation from a 5V supply able Data IN (pin 5) to source6mA at less than V ripple. p-p This input has an impedance of 47K and should ideally be driven by a CMOS logic drive or AF (pin 6) compatible. The drive circuitry should be supplied Audio frequency output. with the same supply voltage as the Tx module. DATA OUT (pin 7) CMOS compatible output. This may be used to Ordering Information: drive external decoders. Part No Description Part No Description QFMT5-434-5V Transmitter 433.92MHz 5v QFMR5-434-15 Receiver 433.92MHz QFMT5-434-3V Transmitter 433.92MHz 3v 15Kbps Data rate QFMT5-434-128 Transmitter 433.92MHz 5v QFMR5-434-50 Receiver 433.92MHz 128Kbps Data rate 50Kbps Data rate QFMR5-434-128 Receiver 433.92MHz 128Kbps Data rate DS305 2 April 01 2001 REG No 277 4001, England. Page 2