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Related Manuals for Linx TRM-900-TT
Summary of Contents for Linx TRM-900-TT
- Page 1 TT Series Remote Control Transceiver Data Guide...
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Page 2: Table Of Contents
Table of Contents Description Features Ordering Information Electrical Specifications Absolute Maximum Ratings Typical Performance Graphs Pin Assignments Pin Descriptions Theory of Operation Module Description Basic Hardware Operation Transceiver Operation Transmit Operation Receive Operation The Pair Process Permissions Mask Acknowledgement Mode Indicator Reset to Factory Default Using the RSSI Line Using the LATCH_EN Line... -
Page 3: Description
FCC RF Exposure Statement TT Series Typical Applications Remote Control Transceiver Power Supply Requirements Data Guide Antenna Considerations Helpful Application Notes from Linx 1.150" Description Interference Considerations The TT Series transceiver is designed for Lot FX9nnT Lot FX9nnT Pad Layout reliable bi-directional, long-range remote 0.630"... -
Page 4: Ordering Information
Symbol Min. Typ. Max. Units Notes Part Number Description Antenna Port TRM-900-TT 900MHz TT Series Remote Control Transceiver RF Impedance Ω MDEV-900-TT TT Series Master Development System Environmental Transceivers are supplied in tubes of 18 pcs. Operating Temp. Range −40 ºC... -
Page 5: Absolute Maximum Ratings
Absolute Maximum Ratings Typical Performance Graphs Absolute Maximum Ratings Supply Voltage V −0.3 +5.5 Any Input or Output Pin −0.3 + 0.3 RF Input Operating Temperature −40 ºC Storage Temperature −55 +125 ºC Exceeding any of the limits of this section may lead to permanent damage to the device. Furthermore, extended operation at these maximum ratings may reduce the life of this device. - Page 6 5.5V V +85°C -40°C 3.3V V +25°C 2.5V V -100 -110 Supply Voltage (V) RF Input Power Level (dBm) Figure 9: TT Series Transceiver TX Current Consumption vs. Supply Voltage at +12.5dBm Figure 12: TT Series Transceiver RSSI Voltage vs. Input Power +85°C -40°C +25°C...
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Page 8: Pin Assignments
Pin Assignments Pin Descriptions Continued Pin Number Name I/O Description ANTENNA If this line is high, then the status line outputs are latched (a received command to activate a status line toggles the output LATCH_EN state). If this line is low, then the output lines are momentary (active for as long as a valid signal is received) and which are latched. -
Page 9: Theory Of Operation
Theory of Operation Module Description The TT Series transceiver is a low-cost, high-performance synthesized The TT Series Remote Control module is a completely integrated RF FSK transceiver. Its exceptional sensitivity results in outstanding range transceiver and processor. It has two main modes of operation: hardware performance. -
Page 10: Basic Hardware Operation
Basic Hardware Operation The following steps describe how to use the TT Series module with ANTENNA hardware only. Basic application circuits that correspond to these steps are shown in Figure 16. 100k 1. Set the C0 and C1 lines opposite on both sides. 100k ACK_EN 2. -
Page 11: Transceiver Operation
Transceiver Operation Transmit Operation The transceiver has two modes of operation: Initiating Unit (IU) that Transmit Operation is entered when any of the status line inputs go high. transmits control messages and Responding Unit (RU) that receives control During Transmit Operation, the MODE_IND line is high. The module messages. -
Page 12: The Pair Process
The Pair Process Permissions Mask The Pair process enables two transceivers to communicate with each The TT Series Transceiver has a Permissions Mask that is used to other. Each transceiver has a local 32-bit address that is transmitted with control which lines an IU is authorized to control. With most systems, if every packet. -
Page 13: Mode Indicator
Mode Indicator Using the RSSI Line The Mode Indicator line (MODE_IND) provides feedback about the current The module’s Received Signal Strength Indicator (RSSI) line outputs a state of the module. This line switches at different rates depending on the voltage proportional to the incoming signal strength. The RSSI Voltage vs. module’s current operation. -
Page 14: Using The Low Power Features
Using the Low Power Features Power Level vs. Resistor Value The Power Down (POWER_DOWN) line can be used to completely power Power Power down the transceiver module without the need for an external switch. Power Resistor Level (dBm) Resistor Level (dBm) Resistor Level... -
Page 15: The Command Data Interface
The Command Data Interface • Receive the entire control message serially instead of needing to monitor individual status lines. Get the IU address for logging access The TT Series transceiver has a serial Command Data Interface (CDI) attempts. that offers the option to configure and control the transceiver through software instead of through hardware. -
Page 16: Frequency Hopping
Frequency Hopping Command Data Interface Commands and Parameters The module incorporates a Frequency Hopping Spread Spectrum (FHSS) Command Description algorithm. This provides immunity from narrow-band interference as well as Read the current value in volatile memory. If there is no volatile meets regulatory requirements for higher output power, resulting in longer Read value, then the non-volatile value is returned. -
Page 17: Usage Guidelines For Fcc Compliance
Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which Any changes or modifications not expressly approved by Linx Technologies the receiver is connected. could void the user’s authority to operate the equipment. -
Page 18: Antenna Selection
(e.i.r.p.) is not more than that necessary for successful communication. ANT-916-WRT-RPS ½ Wave Dipole Helical 1.83dBi 50Ω The TRM-900-TT radio transmitter has been approved by the FCC and ANT-916-CHP ¼ Wave Whip 1.34dBi 50Ω Industry Canada to operate with the antenna types listed in Figure 21 with ANT-916-CW-HW ½... -
Page 19: Typical Applications
Typical Applications Figure 22 and Figure 23 show circuits using the TT Series transceiver. ANTENNA ANTENNA ANTENNA ANTENNA 100k 100k 100k ACK_EN ACK_EN MODE_IND MODE_IND 100k 100k ACK_EN ACK_EN PAIR PAIR 100k MODE_IND MODE_IND 100k LVL_ADJ ACK_OUT LVL_ADJ ACK_OUT 100k 91k 1% PAIR 91k 1%... -
Page 20: Power Supply Requirements
This offers the designer a great deal of flexibility in The transceiver incorporates a precision Vcc TO antenna selection and location within the end product. Linx offers cable low-dropout regulator which allows operation MODULE assemblies with a U.FL connector on one end and several types of over a wide input voltage range. -
Page 21: Interference Considerations
Comparing your 0.045" own design with a Linx evaluation board can help to determine if and at what level design-specific interference is present. Figure 27: Recommended PCB Layout External interference can manifest itself in a variety of ways. -
Page 22: Microstrip Details
This is a critical factor, especially short or couple to traces on the product’s circuit board. in high-frequency products like Linx RF modules, because the trace leading to the module’s antenna can effectively contribute to the length The Pad Layout section shows a typical PCB footprint for the module. -
Page 23: Production Guidelines
Washability Figure 31: Absolute Maximum Solder Times Automated Assembly The modules are wash-resistant, but are not hermetically sealed. Linx recommends wash-free manufacturing; however, the modules can be For high-volume assembly, the modules are generally auto-placed. subjected to a wash cycle provided that a drying time is allowed prior The modules have been designed to maintain compatibility with reflow to applying electrical power to the modules. -
Page 24: General Antenna Rules
General Antenna Rules much ground plane as possible in proximity to the base of the antenna. In cases where the antenna is remotely located or the antenna is The following general rules should help in maximizing antenna performance. not in close proximity to a circuit board, ground plane or grounded metal case, a metal plate may be used to maximize the antenna’s 1. -
Page 25: Common Antenna Styles
There are hundreds of antenna styles and variations that can be employed A loop or trace style antenna is normally printed with Linx RF modules. Following is a brief discussion of the styles most directly on a product’s PCB (Figure 39). This makes commonly utilized. -
Page 26: Regulatory Considerations
Email: labinfo@fcc.gov and certification process. Here at Linx, our desire is not only to expedite the design process, but also to assist you in achieving a clear idea of what is... - Page 27 Disclaimer Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples.
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