CMD-KEY3-433

OEM Configurations
With a one-time NRE and minimum
order, Linx can configure the keypad
and label areas to meet your specific
requirements. Contact Linx for details.
OEM KEYFOB TRANSMITTER DATA GUIDE
CMD-KEYX-XXX
DESCRIPTION
The Linx CMD-KEYX-XXX Remote
Command keyfob is ideal for general-
purpose remote control and command
applications. The unit has been pre-
certified for FCC Part 15 compliance
which reduces costs and time to
product introduction. Available in 315,
418 or 433.92 MHz (418MHz standard),
this stylish and compact remote is
capable of 100+ ft. transmission range.
The unit can be configured with 1-5
buttons and the keypad and labeling
can be customized to meet specific
customer requirements. Selectable
addressing provides security and
allows for 2
10
distinct transmitter-
receiver relationships. The trans-
mission can be decoded using a
matching Linx function module, a KH
series receiver/decoder module or a
Linx LC series receiver paired with a
decoder IC or microcontroller. The unit
operates from a single 3-volt lithium
cell.
2.24"
(57.4)
0.99"
(25.4)
0.45"
(11.5)
1.35"
(34.6)
S4
S2
S1
S3S5
Remote Control / Command
Keyless Entry
Garage / Gate Openers
Lighting Control
Security / Call Systems
Home / Industrial Automation
APPLICATIONS INCLUDE:
PART # DESCRIPTION
CMD-KEYX-315 315 MHz Keyfob Transmitter
CMD-KEYX-418* 418 MHz Keyfob Transmitter
CMD-KEYX-433 433 MHz Keyfob Transmitter
X= # of buttons - insert 1-5
* = Standard Frequency
ORDERING INFORMATION
Physical Dimensions
Revised 6/11/01
Page 2
THEORY OF OPERATION
The CMD-KEYX-XXX Keyfob Command Unit combines a high-performance SAW-
(Surface Acoustic Wave) based transmitter with an on-board encoder. The keyfob
can transmit the status of 1 to 5 buttons along with the state of ten address lines
for security and creation of unique transmitter/receiver relationships. The product’s
operation is straightforward. When a button is pressed, power is applied to the
internal circuitry and the encoder IC is enabled.The encoder then detects the logic
states of the address traces and button data lines.These states are then formatted
into a 3-word transmission cycle which continues until the button is released. The
encoder data is used to modulate the transmitter which through the antenna
conveys the data into free space. The transmitted signal may be received by any
Linx KH or LC receiver or pre-made function module of the same frequency. Once
data is received it is decoded using a decoder IC or custom microcontroller. The
transmitted address bits are checked against the address settings of the receiving
device. If a match is confirmed, the decoder’s output(s) are set to replicate the
transmitter’s button status.
1. Current draw with 50% mark/space ratio.
2. Current draw in standby
Notes:
RF-Parameters
CMD-KEYX-418 Designation Min. Typical Max. Units Notes
Frequency of Carrier F
C
417.925 418 418.075 MHz
Harmonic Emissions P
H
––-40 dBc
RF-Parameters
CMD-KEYX-433 Designation Min. Typical Max. Units Notes
Frequency of Carrier F
C
433.845 433.92 433.995 MHz
Harmonic Emissions P
H
––-45 dBc
RF-Parameters
CMD-KEYX-315 Designation Min. Typical Max. Units Notes
Frequency of Carrier F
C
314.925 315 315.075 MHz
Harmonic Emissions P
H
––-40 dBc
ABOUT THESE MEASUREMENTS
The performance parameters listed below are based on module operation at 25°C
from a 3Vdc supply unless otherwise noted.
PERFORMANCE DATA– CMD-KEYX-XXX
Electrical Parameters
CMD-KEYX- 315,418, 433MHz Designation Min. Typical Max. Units Notes
Operating Voltage Range V
CC
2.7 3.2 Vdc
Current Average I
CA
1.7 mA 1
Current In Sleep I
SLP
0-µA2
Output Power P
O
PART 15.231 Compliant
TX Data length 26bits 3x
Average Data Duty Cycle 50%
Encoder Oscillator FE
NC
70 KHz
Operating Temperature -30°C to +70°C
Page 3
SETTING THE TRANSMITTER ADDRESS
The keyfob allows the selection of one of
1024 unique addresses. All keyfobs from
the factory are supplied set to the same
address. To avoid ID contention with
other units in the vicinity or to create
unique relationships it may be helpful to
change the address settings.This may be
accomplished by cutting the appropriate
jumper trace(s) with a sharp object such
as an X-acto knife as shown. The traces
are accessed by removing the rear cover
as for battery replacement.
CONTENTION CONSIDERATIONS
It is important to understand that only one transmitter at a time can be activated
within a reception area. While the transmitted signal consists of encoded digital
data, only one carrier of any frequency can occupy airspace without contention
at any given time.
BATTERY REPLACEMENT
The remote unit utilizes a CR-2032 Button Lithium Cell.
In normal use it will provide 1-2 years of operation.
Access for replacement is accomplished by gently
prying apart the two halves of the keyfob at the seam
(fingernails will do for this). Once the unit is open,
remove the battery by sliding the battery out from
beneath the retainer. Replace with the same type of cell
while observing the polarity shown.
COMPLIANCE REQUIREMENTS
The CMD-KEYX-XXX has been pre-certified by Linx for FCC Part 15 compliance
when used with an appropriate function module in keeping with the applications
allowed under section 15.231.
LABELING/INSTRUCTION REQUIREMENTS
The CMD-KEYX-XXX Remote Command Unit has already been labeled in
accordance with FCC regulations in effect as of the date of this document. No
further labeling of the unit is needed; however, it is necessary to include the
statement on page 7 in the end products instruction manual or insert card.
0123456789
Battery
+

CMD-KEY3-433

Mfr. #:
Manufacturer:
Linx Technologies
Description:
RF Modules 3 Button Blk Keyfob Transmitter 433MHz
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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