KH3 Series RF Transmitter and Receiver Modules The KH3 Series is ideally suited for volume use in OEM applications such as remote control / command and keyless entry. It combines a high-performance RF receiver with an on-board remote control encoder and decoder. This provides a complete remote control solution in a single package. The KH3 Series consists of a separate single channel OOK RF transmitter and RF receiver. These are paired with the Linx DS Series remote control encoder / decoder. Available at 315, 418 and 433.92MHz, the KH3 Series can transmit remote control activations over distances of up to 3,000 feet (1,000 m). 1.21 in (30.73 mm) Simple Addressing: The modules use the logic state of 10 lines to create a 10 10-bit address This gives 1,022 (2 2) unique addresses. As long as the states 0.63 in of the lines match on both sides, the modules communicate. These lines are (16.00 mm) typically connected to DIP switches for easy configuration. 0.106 in (2.69 mm) Large Number of Buttons: The module has eight lines for connection to buttons or contacts. When a line goes high on the transmitter a corresponding 1.43 in line goes high on the receiver as long as the addresses match. This makes (36.32 mm) implementing a remote control link very easy. 0.63 in (16.00 mm) Simple Implementation: The modules do not require any programming or configuration of any kind other than the address. They are designed for hardware operation, making implementation easy, low cost and quick. 0.106 in (2.69 mm) Designed for Regulatory Compliance: The KH3 Series is offered in three frequencies that meet the regulatory requirements of many countries worldwide. Specifications Frequency No Tuning: The modules are matched to 50-ohms and fully tested, so no TXM-315-KH3/RXM-315-KH3 315MHz tuning or external RF components are required. TXM-418-KH3/RXM-418-KH3 418MHz Low Power: Linx designed the KH3 Series with battery-powered applications TXM-433-KH3/RXM-433-KH3 433.92MHz in mind, so its power consumption has been highly optimized. A power down Operating Voltage features give the designer complete control over the module. TXM-***-KH3 2.7 to 5.2VDC RXM-***-KH3 2.7 to 3.6VDC Backwards Compatible: The KH3 Series is compatible with the KH2 Series. TXM-***-KH3 Supply Current 1.5mA typical It has been designed to be a drop-in replacement for the most common 0dBm implementation of the KH2 Series. TXM-***-KH3 Supply Current 2.7mA typical Max Power RXM-***-KH3 Supply Current 5.2mA typical Power Down Current TXM-***-KH3 1A typical RXM-***-KH3 28A typical TX Output Power 4dBm max. RX Sensitivity 112dBm typ. Operating Temperature Range TXM-***-KH3 40 to +70C RXM-***-KH3 30 to +70C Revised 2/13/2015Typical Application Circuits The circuits below show the typical schematics for the KH3 Series transmitter and receiver. RXM-XXX-KH3 VCC 0 ohm 1 28 NC ANT GND TXE-XXX-KH3 1 24 2 27 LADJ/GND ANT D0 GND GND 2 23 3 26 D0 GND GND D1 NC 3 22 GND D1 A9 4 25 GND GND RSSI 4 21 GND GND A8 5 24 1 20 1 20 VCC VCC A9 5 20 2 19 2 19 VCC VCC A7 + 3 18 6 23 3 18 PDN A8 6 19 4 17 4 17 TE A6 5 16 7 22 5 16 GND D2 A7 7 18 6 15 6 15 D2 A5 7 14 8 21 7 14 8 17 8 13 D3 A6 D3 A4 8 13 9 12 9 20 9 12 GND 9 16 10 11 D4 A5 D4 A3 10 11 10 19 10 15 D5 A2 DATA A4 GND 11 14 11 18 D6 A1 VT A3 12 13 12 17 GND D7 A0 D5 A2 13 16 D6 A1 14 15 100k D7 A0 GND Receiver Typical Application Circuit Transmitter Typical Application Circuit Applications Ordering Information Remote control / command Part Number Description Gate openers TXM-315-KH3 315MHz Transmitter / Encoder Lighting control TXM-418-KH3 418MHz Transmitter / Encoder Call systems TXM-433-KH3 433MHz Transmitter / Encoder Remote status monitoring RXM-315-KH3 315MHz Receiver / Decoder Home / industrial automation Wire elimination RXM-418-KH3 418MHz Receiver / Decoder RXM-433-KH3 433MHz Receiver / Decoder EVAL-***-KH3 KH3 Series Basic Evaluation Kit *** = 315, 418 (Standard), 433MHz Receivers are supplied in tubes of 20 pcs. 159 Ort Lane, Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 KH3 Series RF Transmitter and Receiver Modules www.linxtechnologies.com 25 D CFG 26 A CFG0 27 A CFG1 29 D CFG 30 A CFG0 31 A CFG1