TXE-Fff-KH2 Data Guide
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TXE-315-KH2 TXE-418-KH2 TXE-433-KH2 WIRELESS MADE SIMPLE ® KH2 SERIES TRANSMITTER / ENCODER DATA GUIDE DESCRIPTION The KH2 Series is ideally suited for volume use 1.220" in OEM applications such as remote control and command, and keyless entry. Housed in a compact SMD package, it combines a highly- optimized RF transmitter with an on-board 0.630" RF TRANSMITTER/ENCODER encoder. When paired with a matching KH2 TXE-418-KH2 LOT 10000 Series receiver / decoder module, a reliable wireless link is formed, capable of transferring the status of 8 parallel inputs over distances of up to 3,000 feet. Ten tri-state address lines provide 59,049 (310) addresses for security and 0.180" uniqueness. No external RF components are required except an antenna, making integration straightforward. Figure 1: Package Dimensions FEATURES n Low cost n Ultra-low power consumption n On-board encoder n Compact SMD package n 8 parallel binary inputs n Stable SAW-based architecture n 310 addresses for security and n Adjustable output power uniqueness n Transmit enable line n No external RF components n No production tuning required APPLICATIONS INCLUDE n Remote Control / Command ORDERING INFORMATION n Keyless Entry PART # DESCRIPTION n Garage / Gate Openers TXE-315-KH2 Transmitter 315MHz n Lighting Control TXE-418-KH2 Transmitter 418MHz n Call Systems TXE-433-KH2 Transmitter 433MHz n Home / Industrial Automation RXD-315-KH2 Receiver 315MHz n Fire / Security Alarms RXD-418-KH2 Receiver 418MHz n Remote Status Monitoring RXD-433-KH2 Receiver 433MHz n Wire Elimination EVAL-***-KH2 Basic Evaluation Kit *** = 315, 418 (Standard), 433.92MHz. Transmitters are supplied in tubes of 20 pcs. Revised 9/27/11 ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Parameter Designation Min. Typical Max. Units Notes Supply Voltage VCC -0.3 to +6.0 VDC POWER SUPPLY Any Input or Output Pin -0.3 to VCC VDC Operating Voltage VCC 2.7 – 5.2 VDC – Operating Temperature -30 to +70 °C Supply Current ICC – 1.5 – mA 1,4 Storage Temperature -45 to +85 °C Power-Down Current IPDN –1.0–µA– Soldering Temperature +225°C for 10 seconds TRANSMITTER SECTION *NOTE* Exceeding any of the limits of this section may lead to permanent Transmit Frequency Range: FC damage to the device. Furthermore, extended operation at these maximum TXE-315-KH2 – 315 – MHz – ratings may reduce the life of this device. TXE-418-KH2 – 418 – MHz – TXE-433-KH2 – 433.92 – MHz – PERFORMANCE DATA Center Frequency Accuracy – -75 – +75 kHz – These performance parameters Output Power PO -4 +2 +4 dBm 2,3 VCC are based on module operation at Harmonic Emissions PH – – -36 dBc 2 1 LADJ/GND ANT 24 ANTENNA PORT 25°C from a 3.0VDC supply unless 2 D0 GND 23 RF Output Impedance R –50–Ω 4 otherwise noted. Figure 2 3VDC 3 D1 A9 22 OUT 4 GND A8 21 ENCODER SECTION illustrates the connections 5 VCC A7 20 6 TE A6 19 Data Length – – 26 bits 3x – – – necessary for testing and 7 D2 A5 18 8 D3 A4 17 Average Data Duty Cycle – – 50% – – 4 operation. It is recommended all 9 D4 A3 16 Encoder Oscillator F –70–kHz4 ground pins be connected to the 10 D5 A2 15 ENC 11 D6 A1 14 Data Input: ground plane. 12 D7 A0 13 Logic Low – 0.0 – 0.2 x V VDC 4 CC Figure 2: Test / Basic Application Circuit Logic High VCC x 0.8 – VCC VDC 4 Input Sink Current – 0.6 1.0 1.2 mA 4 ENVIRONMENTAL TYPICAL PERFORMANCE GRAPHS Operating Temperature Range – -30 – +70 °C4 +8 12 With LADJ tied to ground 11 +7 Table 1: KH2 Series Transmitter Electrical Specifications +6 10 +5 9 +4 Notes 8 +3 1. Current draw with 50% mark / space ratio. 7 +2 2. Into a 50Ω load. 6 With LADJ tied to ground +1 Ω 0 3. With 430 resistor on LADJ. 5 -1 4. Characterized, but not tested. 4 -2 3 -3 Ω 2 -4 With 430 resistor on LADJ Supply Current (mA) 1 Ω -5 With 430 resistor on LADJ -6 0 Output Power Into 50 ohms (dBm) -7 2.5 3.0 3.5 4.0 4.5 5.0 2.5 3.0 3.5 4.0 4.5 5.0 Supply Voltage (V) Supply Voltage (V) Figure 3: Supply Current vs. Supply Voltage Figure 4: Output Power vs. Supply Voltage +8 *CAUTION* +7 This product incorporates numerous static-sensitive components. +6 +5 Always wear an ESD wrist strap and observe proper ESD handling +4 procedures when working with this device. Failure to observe this +3 5V precaution may result in module damage or failure. +2 +1 0 -1 3V Output Power (dBm) -2 -3 -4 51 100 150 200 240 300 360 430 510 560 620 680 750 820 910 1.1K LADJ Pin Resistor Value (Ω) Figure 5: Output Power vs. LADJ Resistor Page 2 Page 3 PIN ASSIGNMENTS MODULE DESCRIPTION The KH2 Series transmitter / encoder module combines a high-performance 1 LADJ/GND ANT 24 Surface Acoustic Wave (SAW) based transmitter with an on-board encoder. 2 D0 GND 23 When combined with a Linx KH2 Series receiver / decoder, a highly reliable RF 3 D1 A9 22 link capable of transferring control or command data over line-of-sight distances 4 GND A8 21 of up to 3,000 feet is formed. The module accepts up to 8 parallel inputs, such 5 VCC A7 20 as switches or contact closures, and provides ten tri-state address lines for 6 TE A6 19 security and creation of 59,049 (310) unique transmitter / receiver relationships. 7 D2 A5 18 The KH’s compact surface-mount package integrates easily into existing designs 8 D3 A4 17 and is friendly to hand production or automated assembly. 9 D4 A3 16 10 D5 A2 15 Address Inputs 11 D6 A1 14 A0-A9 TX Enable 12D7 A0 13 SAW Oscillator Ω Parallel Figure 6: KH2 Series Transmitter Pinout (Top View) 50 RF OUT Divider (ANT) OSC Inputs D0-D7 Sync Counter Keyed Output PIN DESCRIPTIONS GATE TRI-Detect Pin # Name Description Output Isolation RF Amplifier Buffer & Filter Level Adjust. This line can be used to adjust the output power level of the transmitter. Connecting to GND will give RF STAGE ENCODER STAGE 1 GND / LADJ the highest output, while placing a resistor to GND will Figure 7: KH2 Series Transmitter Block Diagram lower the output level. Data Input Lines. When TE goes high, the module will THEORY OF OPERATION 2, 3, encode the state of these lines for transmission. Upon D0 - D1 The KH2 Series transmitter operation is straightforward. When the Transmit 7-12 receipt of a valid transmission, the receiver / decoder will Enable (TE) line is taken high, the on-board encoder IC is activated. The encoder replicate these lines on its output lines. detects the logic states of the data and address lines. These states are formatted into a 3-word transmission, which continues until the TE line is taken low. The 4 GND Analog Ground encoder creates a serial data packet that is used to modulate the transmitter. 5 VCC Supply Voltage The transmitter section is based on a simple, but highly-optimized, architecture that achieves a high fundamental output power with low harmonic content. This Transmit Enable Line. When this line goes high, the ensures that most approval standards can be met without external filter 6 TE module will encode the states of the address and data lines components. The KH2 Series transmitter is exceptionally stable over variations into a packet and transmit the packet three times. in time, temperature, and physical shock as a result of the precision SAW device that is incorporated as the frequency reference. Address Lines. The state of these lines must match the The transmitted signal may be received by a Linx KH2 Series receiver / decoder 13-22 A0-A9 state of the receiver’s address lines in order for a module or a Linx LR Series receiver combined with the appropriate decoder IC. transmission to be accepted. 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 outputs 23 GND Analog Ground are set to replicate the transmitter’s inputs. 24 ANT 50-ohm RF Output Page 4 Page 5 ENCODER OPERATION POWER SUPPLY REQUIREMENTS The KH2 Series transmitter internally utilizes The module does not have an internal voltage Power On Vcc TO the HT640 encoder from Holtek. The regulator; therefore it requires a clean, well-regulated MODULE encoder begins a three-word transmission power source. While it is preferable to power the unit 10Ω cycle when the Transmission Enable line from a battery, it can also be operated from a power Vcc IN (TE) is pulled high. This cycle will repeat Standby Mode supply as long as noise is less than 20mV. Power + μ itself for as long as the TE line is held high. supply noise can affect the transmitter modulation; 10 F Once TE falls low, the encoder output therefore, providing a clean power supply for the No Transmission completes its final cycle and then stops as Enabled? module should be a high priority during design. shown in the Encoder / Decoder Timing A 10Ω resistor in series with the supply followed by a Figure 10: Supply Filter Yes diagram. When a transmission enable signal 10µF tantalum capacitor from V to ground will help in cases where the quality is applied, the encoder scans and transmits CC 3 Data Words of supply power is poor.