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RC1280

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
Radiocrafts
Embedded Wireless Solutions
RC1240/1280/1290
©2011 Radiocrafts AS RC1240/RC1280/RC1290 Data Sheet (rev. 1.62) Page 1 of 26
Narrow Band Multi-Channel RF Transceiver Module
Product Description
The RC1240, RC1280 and RC1290 RF Transceiver Modules are compact surface-mounted
high performance modules for 25 kHz narrow band FSK operation with embedded protocol.
The modules are completely shielded and pre-certified for operation under the European and
US radio regulations for license-free use. When used with quarter-wave antennas a line-of-
sight range of 2-4 km can be achieved at 433 MHz.
Applications
• OEM equipment
• Radio modems
• Alarm and security systems
• Point-of-sales terminals
• Bar code scanners
• Telemetry stations
• Fleet management
Features
• Smallest in the world (12.7 x 25.4 x 3.5 mm)
• 25 kHz narrow band multi-channel operation
• Very low current consumption, 3nA OFF mode
• Embedded RC232™ protocol
• Addressing and Error check
• 128 byte data buffer
• Simple UART interface for easy RS232/422/485 wire replacement
• Compact shielded module for SMD mounting
• No external components
• No configuration required for single-channel use
• Easy to use data interface, 3/5 V tolerant I/O
• Wide supply voltage range, 2.8 – 5.5 V
• Conforms with EU R&TTE directive (EN 300 220, EN 301 489, EN 60950) for 25kHz
• Conforms with FCC CFR 47 part 15
Quick Reference Data
Parameter RC1240 RC1280 RC1290 Unit
Frequency band 433.05-434.79 868 – 870 902 – 928 MHz
Number of channels 69 80 51
Channel bandwidth 25 25 25-100 kHz
Data rate 4.8 4.8 1.2-19.2 kbit/s
Max output power (typ) 8 7 4* dBm
Sensitivity -115 -110 -110 dBm
Supply voltage 2.8 – 5.5 Volt
Current consumption, RX 20.2 20.7 20.7 mA
Current consumption, TX 26 28 22.9** mA
Current consumption, SLEEP 0.9 mA
Current consumption, OFF 0.003 uA
* Programmable. Maximum allowed radiated power under FCC CFR 47, part 15 is -1 dBm ERP.
** Apply for -1 dBm.
Radiocrafts
Embedded Wireless Solutions
RC1240/1280/1290
©2011 Radiocrafts AS RC1240/RC1280/RC1290 Data Sheet (rev. 1.62) Page 2 of 26
Typical Application Circuit
GND
CTS/RXTX/RXEN
RTS/TXEN
CONFIG
TXD/SCL
RXD/SDA
GND
GND
VCC
ON/OFF
VDD
GND
RF
GND
2.8 - 5.5 V
Antenna
{
To host MCU or
RS232/422/485
driver
NC
Quick Product Introduction
How do I transmit data?
Send your data to the RXD pin on the module. Use the UART format with settings (19200, 8,
1, N, no flow control), use 2 stop-bits if CTS is enabled. Up to 128 bytes are buffered in the
module. The module will transmit the data when
• the max packet length is reached
• the unique end character is sent
• the modem timeout limit is reached
The packet length, end character and timeout limit are configurable in-circuit.
How do I receive data?
Any received data packet with correct address and check sum will be sent on the TXD pin
using the same UART format as for transmit.
What about the antenna?
In most cases a simple quarter wavelength wire or a PCB track will do. Connect a piece of
wire to the RF pin with length corresponding to the quarter of a wavelength. For space limited
products, contact Radiocrafts and we will recommend the best antenna solution for your
application.
How do I change the RF channel or any other parameter?
To change configurable parameters, assert the CONFIG pin, and send the command string
using the same serial interface as for transmitting data. Parameters can be changed
permanently and stored in non-volatile memory in the module.
Radiocrafts
Embedded Wireless Solutions
RC1240/1280/1290
©2011 Radiocrafts AS RC1240/RC1280/RC1290 Data Sheet (rev. 1.62) Page 3 of 26
Pin Assignment
GND
CTS/RXEN/RXTX
RTS/TXEN
CONFIG
TXD/SCL
RXD/SDA
GND
GND
VCC
ON/OFF
VDD
GND
RF
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
15 16 17 18 19 20 21 22
30 29 28 27 26 25 24 23
Pin Description
Pin no Pin name Description Equivalent circuit
1 GND System ground
GND
2 CTS/RXTX/RXEN UART Clear to Send, UART
RXTX, Receive Mode Enable, or
SLEEP mode activation. Connect
to VDD if not used. Internal 100
kΩ series resistor.
3 RTS/TXEN UART Request to Send,
Transmit Mode Enable, or
SLEEP mode activation. Connect
to VDD if not used. Internal 100
kΩ series resistor.
4 CONFIG Configuration Enable. Active low.
Should normally be set high.
Connect to VDD if not used.
Internal 100 kΩ series resistor.
5 TXD/SCL UART TX Data, or serial data
clock. Internal 100 kΩ series
resistor.
6 RXD/SDA UART RX Data, or serial data
I/O. Internal 100 kΩ series
resistor.
100k
Input: VDD (2.7V)
100k
VDD (2.7V)
Output:
7 GND System ground
8 GND System ground
GND
9 RF RF I/O connection to antenna
220p
10k
RF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

RC1280

Mfr. #:
Buy RC1280
Manufacturer:
Description:
NARROWBAND 868-870
Lifecycle:
New from this manufacturer.
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