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©2008 by RF Monolithics, Inc. WIT2450 - 6/5/08
DEVELOPER KIT
(Info: click here)
General Spec ifica tion s
RF Frequency Range 2400 to 2483 MHz
Radio Certifications FCC Part 15.247, Canadian RSS-210 and European ETS 300.328
Operating Range Indoor - 450 to 900 ft, outdoor -3000 ft with dipole antenna, more than 6 miles with gain antennas
Network Topologies Point-to-point and point-to-multipoint (star)
Network Protocol High remote capacity CSMA with option for limited TDMA
Error Detection and Correction 24-bit CRC and ARQ
Serial Data Interface Asynchronous (UART) CMOS signals, 3.3 V, 5 V tolerant
Serial Data Rate Up to 230.4 kb/s, software selectable
RF Data Rate 460.8 kb/s
Number of Frequency Channels 86
RF Bandwidth 900 kHz
Transmit Power Output 10, 18 or 24 dBm, software selectable
Receiver Sensitivity -92 dBm @ 10-5 BER
Supply voltage 3.3 to 10 V, 5 to 10 V required for 24 dBm transmit power
Current Consumption
24 dBm T r ansmit Power,
115.2 kb/s Serial Data Rate
Remote Power Down 2 µA Base Station Receive 155 mA
Operation: Sleep 750 µA Operation: Transmit 250 m A
Unlocked Receive 150 mA
Locked Receive 75 mA
Transmit 250 mA
Size 69.85 x 47.75 x 4.57 mm
Weight 28 g
Operating Temperature -40 C to +70 C
Humidity 20% to 90% (non-condensing)
WIT2450M2
Features:
• High speed wireless serial data
transmission
• Robust 2.4 GHz frequency hopping
spread spectrum technology
• 3.3 volt operation
• Small size, light weight
• Certified for unlicensed operation in the
USA, Canada and Europe
Benefits:
• Suitable for point-to-point and point-to-
multipoint networks
• High immunity to interference and
multipath fading
• Easy to integrate
• Wor ldwide lice nse -free opera tion
•RoHS Compliant
• Lo w cost
Shown with shield removed
WIT2450M2 low-cost transceiver modules are designed to transmit serial data using robust
2.4 GHz frequen cy hopping spre ad spectrum (FHSS) techno logy . WIT2 450M2 module s employ
RFM’ s be ac on-syn ch ronized CSMA a t an R F d at a rate of 460.8 kb/s to s upp ort a l arge number
of remotes . WIT2450M2 transce ive rs are s ui t able for both poin t-to- poi nt and point-to-mu lti poi nt
networks. FHSS technology provides immunity to both inte rference and multipath fading. The
small size and light weight of these transceiver modules make them suitable for a variety of
applications. WIT2450M2 modules are certified for unlicensed operation in the USA, Canada
and Europe.
Low-Cost
FHSS
Transceiver
Module
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©2008 by RF Monolithics, Inc. WIT2450 - 6/5/08
Connector I/O Pins
Pin Signal Type Description
1 GND - Signal and chassis ground
2 TxD Input Data input to be transmitted
3 RxD Output Received data output
4 CFG Input Configuration select, used to switch radio between data and control mode
5 RTS Input Request to send input, used for receive flow control by the host
6 Sleep/DTR Input Module sleep/DTR input, sleep is active high
7 DCD Output Data carrier detect, indicates FHSS synchronization on remotes
8 CTS Output Clear to send output, used for receive flow control by the radio
9 RSSI Output Received signal strength indicator (analog signal)
13 RSSI Strobe Output High signal indicates valid RSSI
14 Power Down Input Low power mode input, active low
16 Vcc Power Positive supply - minimum 3.3 V, nominal 5.0 V, maximum 10.0 V
Large Network Support
WIT2450M2 modules transmit at an RF data rate of 460.8 kb/s using beacon-synchronized CSMA to support large point-to-multipoint (star)
network application s. Serial communicat ions between a WIT2450 M2 module and it s host can run at up to 230.4 kb/ s to further speed da ta
communication.
Reliable
WIT2450M2 modules provide both reliable communication and reliable operation. Using robust frequency hopping spread spectrum
technology , WIT2450M2 modules provide immunity to interference and multipa th fading. Using a 24-bit CRC for error detection, a utomatic
retransmit request (ARQ) and a 3K data buffer, error-free transparent communication is automatic. Built-in data scrambling adds a
measure of secu rity. Reliabl e operat ion is a ssured thro ugh R FM’ s stri ngent QA processe s. All WI T245 0M2 modu les are manufa ctured in
an ISO9000 ce rtifi ed fac ili ty.
Simple
Simple to integrate and use, the WIT2450M2’s default parameter settings work for most applications. For other applications, software
control makes cha ngi ng p ara me ter settings eas y. The WIT2450M2, wit h i t s sm all s iz e an d l ow p ow er con su mp tio n, i s sim pl e to integrate
into your product. The WIT2450M2’s RS-232 style interface with standard 3.3 volt CMOS signal levels makes integration easy. Since
WIT2450M2 modules are certified for license free operation in the USA, Canada and Europe, your WIT2450M2 based product does not
have to repeat radio regulatory approval.
Versatile
WIT2450M2 operating parameters are configurable under software control. Even the transmitter power level can be selected using a
straight- forward command set. Both point-to-point and point-to-multipoint modes are supported. Baud rates from 1.2 to 230.4 kb/s are
provi de d f or s eri al communicati on bet w een a WIT 2450M2 and its host. Measuring jus t 69.85 x 47.7 5 x 4 .57 m m an d w e igh ing 28 grams,
the WIT2450M2 can be integrated into fixed, portable or handheld devices with little impact on the size and weight.
hysical Sp ecifications - dimensions i n inches
