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Description, Features, Data guide – Linx Technologies TRM-xxx-NT User Manual

Page 3: Nt series transceiver module

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Description

The NT Series transceiver module is designed
for bi-directional wireless data transfer. The
868MHz version is suitable for European
operation and the 900MHz version is suitable
for North and South America. The modules
have an outstanding range of up to 3,000 feet
(914 meters, line of sight). Low power states
optimize current consumption for battery-powered devices.

The modules have two interfaces for data transfer. The first uses a standard
Universal Asynchronous Receiver Transmitter (UART) with a simple built-in
protocol that supports data rates of 9.6kbps or 56kbps (see Reference
Guide 00102). The other option is a transparent interface that bypasses the
protocol engine and directly modulates the RF carrier. This supports data
rates of up to 300kbps.

The basic configuration settings are done in hardware through the logic
state of several pins on the module. Optionally the UART interface can be
used for software configuration, also giving access to additional features.

The modules are capable of generating +12.5dBm into 50-ohms and have
a typical sensitivity of −113dBm. Housed in a compact reflow-compatible
SMD package, the transceivers require no external RF components except
an antenna, greatly simplifiying integration and lowering assembly costs.

Features

• Long range
• Low cost
• Low power consumption
• No programming required
• 8 parallel selectable channels
• Transparent data transfer
• Data rates up to 300kbps
• RSSI and READY output signals

• Power saving options

(POWER_DOWN, STANDBY)

• Adjustable output power level
• No external RF components

required

• Wide temperature range
• Compact surface mount package
• No production tuning required

NT Series Transceiver Module

Data Guide

Revised 4/22/2015

0.131"

0.630"

1.150"

1

1

NT Series Transceiver

TRM-900-NT

NT Series Transceiver

TRM-900-NT

Lot FX9nnnLot FX9nnn

A large-print version of this document is available at
www.linxtechnologies.com.

Figure 1: Package Dimensions

30

Production Guidelines

30

Hand Assembly

30

Automated Assembly

32

General Antenna Rules

34

Common Antenna Styles

36

Regulatory Considerations

38

Achieving a Successful RF Implementation

39

Helpful Application Notes From Linx