FM SIL T
RANSMITTER MODULE
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FM Radio Transmitter
Transmit Range Up To 250m
CMOS/TTL Input
SIL Package
No Adjustable Components
Very Stable Operating Frequency
Low Current Consumption (Typ 8mA)
Wide Operating Voltage (2.7-14V)
Available As 315, 418 Or 433MHz
Compatible With RF Solutions FM Receivers
FM-RTF3-XXX
Applications
Wireless Security Systems
Car Alarms
Remote Gate Controls
Remote Sensing
Data Capture
Sensor Reporting
Description
The R F Solutions Ltd. FM hybrid transmitter module provides a complete RF transmitter which can be used to
transmit data at up to 9.6KHz from any standard CMOS/TTL source.
The module is very simple to operate and offers low current consumption (typ. 8mA). Data can be supplied
directly from a microprocessor or encoding device, thus keeping the component count down and ensuring a
low hardware cost.
The module exhibits extremely stable electronic characteristics due to the use of ‘Thick-Film’ hybrid technology,
which uses no adjustable components and ensures very reliable operation.
The modules are compatible with R F solutions Ltd. range of FM receivers to provide a complete solution.
Circuit Schematic
V
CC
External
Antenna
Data In
DS059_2 Jul ‘01
©2001 Reg. No. 227 4001, ENGLAND
Page 1
FM SIL T
RANSMITTER MODULE
Mechanical Dimensions
22.86mm
Pins on "0.1 pitch
FM-RTF3-XXX
Component Side
1 2
6 7
11.43mm
2.54mm 10.16mm
Pin Dimentions :
0.25mm x 0.50mm
Pin Description
Pin Number
1
2
6
7
Name
EA
IN
GND
Vcc
Description
External Antenna
Data input
Ground, Connect to RF earth return path
Supply Voltage
Typical Application
ANTENNA
+5V
+5V
RFT3-XXX
1 2
6 7
1
2
3
4
5
6
7
8
9
A0
A1
A2
A3
A4
A5
A6
A7
VSS
HT12E
VDD
DOUT
OSC1
OSC2
TE\
AD11
AD10
AD9
AD8
18
17
16
15
14
13
12
11
10
R
OSC
Antenna Configuration
Helical Coil Antenna
RF
Loop Antenna
RF
Whip Antenna
RF
17.3cm @ 433MHz
34 Turns of enamelled copper wire diameter 0.5mm
close wound on 2.5mm diameter former
Loop Antenna Area
4 To 10cm
2
Track Width
1mm
RF GND
Capacitor 1.5 - 5pF
Fixed or Variable
DS059_2 Jul ‘01
©2001 Reg. No. 227 4001, ENGLAND
Page 2
FM SIL T
RANSMITTER MODULE
Technical Specifications
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current (Vcc = 5V, IN=1KHz Square Wave)
Frequency Deviation
RF Output into 50Ω (Vcc=5V)
Harmonic Spurious Emissions
Input High Voltage
Time from Power on to data valid
Max Data Rate
Operating Temperature
MIN
2.7
TYPICAL
8
50
7
-50
2.5
FM-RTF3-XXX
MAX
14
-25
Vcc
200
9.6
+80
DIMENSION
VDC
mA
KHz
dBm
dBc
V
µ
S
KHz
°C
Part Numbering
Part Number
FM-RFT3-315
FM-RFT3-433
Description
SIL FM Transmitter Module 315 MHz (Future Product)
SIL FM Transmitter Module 433 MHz
For more information or general enquiries, please contact our official UK distributor;
RF Solutions Ltd.,
Unit 21, Cliffe Industrial Estate,
South Street,
Lewes,
E Sussex, BN8 6JL. England
Tel +44 (0)1273 898 000
Email sales@rfsolutions.co.uk
Fax +44 (0)1273 480 661
http://www.rfsolutions.co.uk
RF Solutions is a member of the Low Power Radio Association
All Trademarks acknowledged and remain the property of the respected owners
Information contained in this document is believed to be accurate, however no representation or warranty is given and R.F. Solutions Ltd. assumes no liability with respect to the accuracy of such
information. Use of R.F.Solutions as critical components in life support systems is not authorised except with express written approval from R.F.Solutions Ltd.
DS059_2 Jul ‘01
©2001 Reg. No. 227 4001, ENGLAND
Page 3
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