STD-502-R/DSSS low power radio transceiver

Product catalog summary

General Interface
The STD-502-R 2.4 GHz transceiver employs direct sequence spread spectrum (DSSS) modulation and a true diversity circuit, ensuring reliable communication in the crowded 2.4 GHz band. It complies with global standards including European EN 300 440, U.S. FCC Part 15.247, Canadian ISED RSS-210, and Japanese ARIB STD-T66, making it suitable for international markets. The transceiver features a transparent data interface for user protocol communication and can be configured via a UART interface using specific commands. An onboard ASIC with an SS correlator supports long-term industrial application supply.

Applications
The transceiver is ideal for industrial telecontrol and telemetry systems, offering CE, FCC, ISED, and ARIB conformity. It utilizes DSSS modulation, a true diversity receiver with dual circuits, and supports module settings through dedicated commands. The device facilitates data communication via a transparent interface and operates with low power across 77 RF channels, achieving a communication range of 300 meters line-of-sight (LOS).

Features
The STD-502-R is a DSSS low power radio transceiver operating at 2.4 GHz. Key specifications include:

Applicable Standards: EN 300 440, FCC Part 15.247, ISED RSS-210, ARIB STD-T66
Communication Method: Simplex, Half duplex
Emission Type: F1D (FSK)
Frequency Range: 2402.5 to 2478.5 MHz
Number of RF Channels: 77
Channel Spacing: 1 MHz
RF Chip Rate: 144 k, 288 kcps
Supply Voltage: 3.3 to 5.5 V
Supply Current: 55 mA typical (TX), 65 mA typical (RX)
RF Output Power: 10 mW max. (EIRP)
Receiver Sensitivity: -93 dBm (19,200 bps BER 0.1%)
Operating Temperature: -20 to +65°C (No dew condensation)
Dimensions: 50 x 30 x 9 mm (excluding connectors)
Weight: 24 g
RF Connectors: RP-SMA x 2

Data and Command Interface
The data interface supports DI / DO / CLK at 9,600 / 19,200 bps (Synchronous), while the command interface operates at UART 19,200 / 38,400 / 57,600 bps with data length of 8 bits, no parity, 1 stop bit, and no flow control.

Additional Information
Specifications are subject to change without prior notice. For more details, contact Circuit Design at their Nagano, Japan office.

Catalog excerpts

STD-502-R/DSSS low power radio transceiver-1

DSSS low power radio transceiver The STD-502-R 2.4 GHz transceiver uses direct sequence spread spectrum (DSSS) modulation and a true diversity circuit, enabling reliable communications even in the congested 2.4 GHz band. The STD-502-R complies with the European EN 300 440, U.S. FCC Part 15.247, Canadian ISED RSS-210 and Japanese ARIB STD-T66 standard, making it ready for the global market. The transceiver uses a transparent data interface to enable users to communicate using their own protocols. The modules can be set easily via the UART interface using dedicated commands. *Circuit Design developed an onboard ASIC containing SS correlator (a key part of spread spectrum communication). This ensures long term supply for industrial applications. CE, FCC, ISED and ARIB conformity Uses direct sequence spread spectrum (DSSS) modulation A true diversity receiver with two built-in receiver circuits Module settings using dedicated commands Data communication using a transparent interface Low power operation 77 RF channels Communication range 300 m LOS Applications ・ Industrial telecontrol ・ Telemetry systems Applicable standard EN 300 440 / FCC Part 15.247 / ISED RSS-210 / ARIB STD-T66 Communication method Simplex, Half duplex Emission type Channel spacing Supply voltage Supply current Receiver sensitivity Operating temperature UART 19,200 / 38,400 / 57,600 bps Data length: 8 bit, Parity: None, Stop bit: 1, Flow control: None Specifications are subject to change without prior notice Sales Division 7557-1 Hotaka, Azumino, Nagano 399-8303, Japan Tel:+81-(0)263-82-1024 Fax:+

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STD-502-R/DSSS low power radio transceiver

STD-502-R/DSSS low power radio transceiver

Catalog excerpts

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