RXM-433-RM Linx Technologies Inc, RXM-433-RM Datasheet - Page 9

• Manufacturer Part Number: RXM-433-RM
• Description: RECEIVER RF 433MHZ
• Manufacturer: Linx Technologies Inc
• Series: RMr

Specifications of RXM-433-RM

• Frequency: 433MHz
• Sensitivity: -100dBm
• Data Rate - Maximum: 10 kbps
• Modulation Or Protocol: ASK, OOK
• Applications: ISM, Garage Door Openers, RKE
• Current - Receiving: 14mA
• Data Interface: PCB, Through Hole
• Antenna Connector: Through Hole
• Voltage - Supply: 3.9 V ~ 9 V
• Operating Temperature: -10°C ~ 50°C
• Package / Case: 7-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -

Figure 9: Simple circuit implementing carrier detect
DATA CODING
circuitry can latch the receiver on until all data is received;if no carrier is detected
it can immediately be put back to “sleep”.
average supply current may often be reduced by a factor of 20 or more,
depending upon the system requirements. The data detect output is valid within
3ms after application of the supply.
Once a reliable RF link has been established, the challenge becomes how to
most effectively transfer data across it. Since the transmit and receive modules
have no internal digital coding/decoding, a user has tremendous flexibility to
send many types of analog and digital data. It is important to understand,
however, that some intelligent transmission structure must be used.This is true
for several reasons. The first and most significant is that there must be some way
to distinguish an intended transmission from interferers and ambient noise. In
addition, it is generally not possible to hold DC levels across an RF link;
therefore, transitions must take place at minimum intervals. The designer must
always structure his protocol to take into account such considerations in order to
assure a reliable and error-free wireless link. For further information on such
issues you may wish to refer to the application note section of the Linx internet
site @www.linxtechnologies.com.
Application-specific data encoding and transfer is often accomplished using a
microprocessor. Inexpensive micros such as the Microchip PIC series make an
excellent choice for this task.They can directly interface to the RM’s data output.
If you do not have a microprocessor on-board your product and you want to send
control signals such as a key press, switch closing, or low-rate data, consider
using an encoder and decoder IC chipset.These chips take care of all encoding,
error checking, and decoding functions and are available from a number of
manufacturers including Linx.An example of such an application is shown on the
following page.
By pulsing the receiver on/off, the
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