Linx-technologies TRM-xxx-TT User Manual

TT SeriesRemote Control and Sensor Transceiver Data Guide

– –– –14 15Theory of OperationThe TT Series transceiver is a low-cost, high-performance synthesized FSK transceiver. Its exceptional sensitivi

– –– –16 17Basic Hardware OperationThe following steps describe how to use the TT Series module with hardware only. Basic application circuits

– –– –18 19Transceiver OperationThe transceiver has two modes of operation: Initiating Unit (IU) that transmits control messages and Respondin

– –– –20 21The Pair ProcessThe Pair process enables two transceivers to communicate with each other. Each transceiver has a local 32-bit addre

– –– –22 23Mode IndicatorThe Mode Indicator line (MODE_IND) provides feedback about the current state of the module. This line switches at dif

– –– –24 25Using the Low Power FeaturesThe Power Down (POWER_DOWN) line can be used to completely power down the transceiver module without th

– –– –26 27Receiver Duty CycleThe module can be configured to automatically power on and off while in receive mode. Instead of being powered on

– –– –28 29The Command Data InterfaceThe TT Series transceiver has a serial Command Data Interface (CDI) that offers the option to configure an

– –– –30 31Command Data Interface Commands and ParametersCommand DescriptionReadRead the current value in volatile memory. If there is no vola

– –– –32 33Usage Guidelines for FCC ComplianceThe TT Series module is provided with an FCC and Industry Canada Modular Certification. This cert

Table of Contents 1 Description 1 Features 2 Ordering Information 2 Electrical Specications 4 Absolute Maximum Ratings 5 Transceiver Timings 6

– –– –34 35Le présent émetteur radio (TRM-900-TT) a été approuvé par Industrie Canada pour fonctionner avec les types d’antenne énumérés la Fi

– –– –36 37Typical ApplicationsFigure 31 and Figure 32 show circuits using the TT Series transceiver.In this example, C0 is high and C1 is low

– –– –38 39Antenna ConsiderationsThe choice of antennas is a critical and often overlooked design consideration. The range, performance and le

– –– –40 41Interference ConsiderationsThe RF spectrum is crowded and the potential for conflict with unwanted sources of RF is very real. While

– –– –42 43Do not route PCB traces directly under the module. There should not be any copper or traces under the module on the same layer as t

– –– –44 45Production GuidelinesThe module is housed in a hybrid SMD package that supports hand and automated assembly techniques. Since the m

– –– –46 47General Antenna RulesThe following general rules should help in maximizing antenna performance.1. Proximity to objects such as a u

– –– –48 49Common Antenna StylesThere are hundreds of antenna styles and variations that can be employed with Linx RF modules. Following is a

– –– –50 51Regulatory ConsiderationsWhen working with RF, a clear distinction must be made between what is technically possible and what is le

DisclaimerLinx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to mak

– –1DescriptionThe TT Series transceiver is designed for reliable bi-directional, long-range remote control and sensor applications. It consists

– –– –2 3TT Series Transceiver SpecificationsParameter Symbol Min. Typ. Max. Units NotesPower SupplyOperating Voltage VCC2.5

– –– –4 5TT Series Transceiver SpecificationsParameter Symbol Min. Typ. Max. Units NotesInput Logic Low VI L0.8 VDC 9 Logic Low VI LVCC*0

– –– –6 7TRM-xxx-TT Typical Performance Graphs-17.00-12.00-7.00-2.003.008.0013.000 150 300 450 600 750900Output Power (dBm)LVL_ADJ Resistance

– –– –8 91313.51414.51515.51616.52.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5TX ICC (mA)Supply Voltage (V) -40°C25°C85°CFig

– –– –10 1100.511.522.533.5-21-31-41-51-61-71-81-91-101-111RSSI Output Voltage (V)RF Input Power Level (dBm) -40°C25°C85°C0.10.150.20.250.30.3

– –– –12 13Pin AssignmentsGNDNCGND GNDNCNCGNDNCNCNCNCNCGNDNCGNDANTENNA123456783738394041424344S0S1GND GNDPAIRC1ACK_OUTC0CMD_DATA_OUTLATCH_ENS2