RXD-315-KH2 Linx Technologies Inc, RXD-315-KH2 Datasheet - Page 3

• Manufacturer Part Number: RXD-315-KH2
• Description: RECEIVER RF 315MHZ SMT KH2 SER
• Manufacturer: Linx Technologies Inc
• Series: KH2r

Specifications of RXD-315-KH2

• Frequency: 315MHz
• Sensitivity: -102dBm
• Data Rate - Maximum: 5 kbps
• Modulation Or Protocol: ASK, OOK
• Applications: Garage Openers, RKE, Security Alarms
• Current - Receiving: 5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: Built-in Remote Control Decoder
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 70°C
• Package / Case: Non-Standard SMD
• Board Size: 36.3 mm x 16 mm x 4.6 mm
• Minimum Operating Temperature: - 40 C
• Supply Voltage (min): 2.7 V
• Product: RF Modules
• Maximum Frequency: 315 MHz
• Supply Voltage (max): 3.6 V
• Maximum Operating Temperature: + 70 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIN ASSIGNMENTS
Figure 7: KH2 Series Receiver Pinout (Top View)
PIN DESCRIPTIONS
Page 4
2, 3, 7, 8,
9, 12, 13,
Pin #
15-24
14
10
11
25
26
27
28
1
4
5
6
Name
D0-D7
A0-A9
DATA
RF IN
RSSI
GND
PDN
GND
V
NC
NC
VT
CC
Power Down. Pulling this line low will place the receiver into
a low-current state. The module will not be able to receive a
Received Signal Strength Indicator. This line will supply an
Data Output Lines. Upon a valid transmission, these lines
will be set to replicate the state of the transmitter’s data
Address Lines. The state of these lines must match the
analog voltage that is proportional to the strength of the
Valid Transmission. This line will go high when a valid
state of the transmitter’s address lines in order for a
Data output of the receiver prior to the encoder.
10
11
12
13
14
No Connection. For physical support only.
No Connection. For physical support only.
1
2
3
4
5
6
7
8
9
NC
D0
D1
GND
VCC
PDN
D2
D3
D4
DATA
VT
D5
D6
D7
transmission to be accepted.
transmission is received.
signal in this state.
RSSI
GND
ANT
50-ohm RF Input
Description
received signal.
Analog Ground
Supply Voltage
Analog Ground
NC
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
28
27
26
25
24
23
22
21
20
19
18
17
16
15
lines.
MODULE DESCRIPTION
Figure 8: KH2 Series Receiver Block Diagram
THEORY OF OPERATION
50Ω RF IN
(Antenna)
The KH2 Series module combines the popular Linx LR Series receiver with a
decoder IC in a convenient SMD package. The module is ideal for general-
purpose remote control and command applications. When paired with a
matching Linx KH Series transmitter / encoder, OEM transmitter, LC, or LR
Series transmitter and Holtek HT640 encoder combination, a highly reliable RF
link is formed, capable of transferring control and command data over line-of-
sight distances in excess of 3,000 feet. The on-board receiver / decoder
combination provides eight switched outputs that correspond to the state of the
data lines on the transmitter’s encoder. Ten tri-state address lines are also
provided to allow up to 59,049 (3
The KH2 Series receiver module is designed to receive transmissions from a
matching KH Series transmitter module or other compatible Linx transmitter
product. When transmitted data is received, the data is presented to the on-
board decoder. If the incoming address matches the local address settings, the
decoder’s outputs are set to replicate the states of the transmitter’s data lines.
The RF section of the KH2 module utilizes an advanced single-conversion
superhet design with a synthesized architecture, high IF frequency, and multi-
layer ceramic filters. The exceptional accuracy of the crystal-based synthesized
archetecture in the KH2 receiver module allows the receiver’s pass band to be
quite narrow, thus increasing sensitivity and reducing susceptibility to near-band
interference.
Band Select
Filter
XTAL
LNA
PLL
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9
Oscillator
Detector
Buffer
Sync.
Transmission Gate Circuit
VCO
Comparator
Collector
Decoder Stage
Divider
Data
90˚
0˚
RF Stage
10
) unique identification codes.
∑
Register
Shift
8-bit
Comparator
10.7MHz
IF Filter
Circuit
Latch
Limiter
Control
Buffer
Logic
Circuit
AND
+
-
D0
D1
D2
D3
D4
D5
D6
D7
Data Slicer
RSSI/Analog
Data Out
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