Not for new design, this product will be obsoleted soon
RFW3M
Vishay RFWaves
RFW3M Transceiver Module
KEY FEATURES
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Designed for short range wireless communication
in the 2.4 GHz - world wide license free ISM band
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High Data rate - up to 3 Mbps
Frequency agility - supports 7 different operating
channels
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Each channel utilizes DSSS, with a unique spreading
code
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Simple 3 line serial configuration bus
Features low power consumption
Typical peak output transmission power of 8 dBm
Typical sensitivity of - 80 dBm
Complies with FCC and ETSI regulations
Wide operating voltage range 2.5 - 3.6 V
Wide operating temperature range (- 40 °C) to (+ 85 °C)
Short signal aquisition time 1 µs
RFW3M is RoHS compliant
The company’s products are covered by one or more of
the following:
Taiwan Patent No. 155994, Taiwan Patent No.
176767, USA Patent No. 6,535,545. Other patents
pending.
TYPICAL APPLICATIONS
• Home automation and security
• Wireless high quality audio
• Wireless video
• Wireless sensors
• Wireless headsets
• Toys
• Wireless USB
GENERAL DESCRIPTION
The RFW3M is a short-range, half duplex radio
transceiver module. The transceiver operates in the
world wide unlicensed Industrial Scientific and Medical
(ISM) band of 2400 MHz to 2483.5 MHz, complying
with worldwide regulations and standards. The module
supports 7 operating channels within this band. Each
channel utilizes a unique Direct Sequence Spread
Spectrum (DSSS) code. The modulation scheme is
100 % Amplitude Shift Keying (ASK). The module
offers high data rate of up to 3 Mbps. The module core
consists of 2 chips, offering small size, low power
consumption and simple integration into applications.
Three digital lines control the module:
Data I/O line is a serial interface through which both
transmitted and received data pass. RF Activate sets
the transceiver to standby mode and is used for reducing
power consumption. Tx/Rx sets the transceiver to
Transmitting (Tx) or receiving (Rx) mode.
A three wire serial bus is used to program the transceiver
settings such as data rate, clock frequency, and channel
selection. The programming is saved as long as the
power supply remains continuous. The programming is
not lost in standby mode.
The module includes 13 pins and is soldered directly
onto the PCB like any other SMT component.
The module is designed to operate in a wide temperature
range (- 40 °C to 85 °C), making it suitable for industrial
and consumer products.
Low power consumption is achieved due to the following
characteristics:
In standby mode, the transceiver consumes almost no
power (10 µA at V = 3 V). It features very short
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wakeup and lockup time and the signal acquisition
requires only 1 µs. Thus, the overhead has been
almost eliminated, enabling the design of highly
efficient power consumption schemes.
Document Number 81338
Rev. 1.2, 09-Feb-09
www.vishay.com
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For more information please contact: RFTransceivers@vishay.com