ETRX357 Telegesis Ltd, ETRX357 Datasheet - Page 20

• 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

12 Physical Dimensions
For ideal RF performance when using the on-board antenna, the antenna should be located at the
corner of the carrier PCB. There should be no components, tracks or copper planes in the “keep-
out” area which should be as large as possible. When using the U.FL RF connector the “keep-out”
area doesn’t have to be kept. NB: The module transmit/receive range will depend on the antenna
used and also the housing of the finished product.
©2009 Telegesis (UK) Ltd
Symbol
L
W
H
A1
A2
R1
R2
X1
X2
Explanation
Length of the module
Width of the module
Height of the module
Distance centre of pad PCB edge
Pitch
Keep-out Zone from corner of PCB
Keep-out Zone from corner of PCB
Distance centre of Antenna connector PCB edge
Distance centre of Antenna connector PCB edge
Figure 8. ETRX3 Physical Dimensions
Table 13. ETRX3 Physical Dimensions
- 20 -
ETRX35x Preliminary Product Manual
Distance
ETRX351 AND ETRX357
25.0mm
19.0mm
1.27mm
17.5mm
3.0mm
0.9mm
4.1mm
3.8mm
2.8mm