ETRX357 Telegesis Ltd, ETRX357 Datasheet - Page 5

• Manufacturer Part Number: ETRX357
• Description: MODULE ZIGBEE EM357 W/CHIP ANT
• Manufacturer: Telegesis Ltd

Specifications of ETRX357

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: ISM
• Power - Output: 3dBm
• Sensitivity: -100dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 27mA
• Current - Transmitting: 31mA
• Data Interface: PCB, Surface Mount
• Memory Size: 192kB Flash, 12kB RAM
• Antenna Connector: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 920-1006-2

1 Introduction
This document describes the Telegesis ETRX351 and ETRX357 ZigBee® modules which have
been designed to be easily integrated into another device and to provide a fast, simple and low
cost wireless mesh networking interface.
The Telegesis ETRX3 series modules are based on the Ember ZigBee® platform consisting of the
single chip EM351 or EM357 combined with the ZigBee PRO compliant EmberZNet meshing
stack.
command interface and advanced hardware design.
The configurable functionality of the Telegesis AT Commandset often allows the ETRX3 series
ZigBee modules to be used without an additional host microcontroller saving even more integration
time and costs.
modules can be used with custom-built firmware and they represent an ideal platform for custom
firmware development in conjunction with the Ember development kits.
No RF experience or expertise is required to add this powerful wireless networking capability to
your products. The ETRX351 and ETRX357 offer fast integration opportunities and the shortest
possible time to market for your product.
1.1 Hardware Description
The main building blocks of the ETRX351 and ETRX357 are the single chip EM351 and EM357
from Ember, a 24MHz reference crystal and RF front-end circuitry optimized for best RF
performance. The modules are available with on-board antenna or alternatively a U.FL connector
for attaching external antennae. Modules with the U.FL connector are identified by the “HR” suffix.
The integrated antenna is an Antenova Rufa, and details of the radiation pattern etc are available
from the Antenova website [5].
Module
ETRX351
ETRX351HR EM351
ETRX357
ETRX357HR EM357
The ETRX351 and ETRX357 are used for ZigBee®
create your own custom firmware, and not use the pre-loaded Telegesis AT-Command interface,
you will need the InSight toolchain, consisting of InSight Desktop™ together with a comprehensive
integrated development environment (IDE) and C-language compiler toolchain from Ember. The
Ember development environment is not suitable for an 802.15.4-only application that does not use
the ZigBee layer.
©2009 Telegesis (UK) Ltd
Integration into a wide range of applications is made easy using a simple AT style
Chip
EM351
EM357
In addition to the Telegesis AT Commandset, the ETRX351 and ETRX357
Table 1: Memories
Flash
128kB
128kB
196kB
196kB
- 5 -
(www.zigbee.org)
ETRX35x Preliminary Product Manual
ETRX351 AND ETRX357
applications. If you wish to
RAM
12kB
12kB
12kB
12kB