DSSS transceiver STD-504

2.4 GHzradioRF

Overview
The STD-504 is a compact 2.4 GHz DSSS radio transceiver designed for industrial telemetry and telecontrol. It integrates a true diversity receiver and transmitter diversity to maintain reliable links in congested 2.4 GHz environments. The module supports low-power and battery operation, provides a transparent RF data interface for user protocols, and is configurable via a UART command interface.

Certifications
Complies with EN 300 328, U.S. FCC Part 15.247, Canadian ISED RSS-210 and Japanese ARIB STD-T66, enabling global deployment.

Features

• CE, FCC, ISED and ARIB conformity certification
• Direct Sequence Spread Spectrum (DSSS) modulation
• Channel stepping option controlled via CHC pin
• True diversity receiver (two built-in receiver circuits)
• Transmitter diversity
• Module settings via dedicated UART commands
• Transparent RF data communication interface (DO/DI/CLK)
• Low-power operation suitable for battery use; 75 channels
• Line-of-sight communication range: 300 m
• Onboard temperature sensor

Applications

• Industrial telecontrol
• Telemetry systems

Specifications (summary)

• Applicable standard: EN 300 328; FCC part 15.247; ARIB STD-T66; ISED RSS-210
• Communication method: Simplex
• Transmission method: Direct sequence spread spectrum
• Emission type: F1D (FSK)
• Frequency: 2402.5 to 2476.5 MHz
• Channel spacing: 1 MHz
• Data bit rate (RF): 19.2 kbps
• Chip rate: 288 kcps
• RF connectors: MHF x 2
• Spreading code: 15 Chips (M-sequence: 111101010001100)
• Operating temperature range: -30 to +70 °C (no dew condensation)
• Supply voltage: 3.3 to 5.0 V DC (Absolute max. 5.5 V)
• Supply current: TX 55 mA typ.; RX 60 mA typ.
• Dimension: 40 x 29 x 5.5 mm
• Weight: 10 g
• RF output power: < 10 mW (e.i.r.p.)
• TX data input: Digital L = GND, H = Vref
• RF input level (RX): < -13 dBm
• Receiver sensitivity: -93 dBm (19.2 kbps, BER 0.1%)
• RF Data Interface ports: DO / DI / CLK (data bit rate 19.2 kbps; sync: CLK)
• Command Interface ports: TXD / RXD (UART communication, RS232C format; asynchronous)
• UART bit rates supported: 19.2 k / 38.4 k / 57.6 kbps
• Flow control: None
• Other UART parameters: Data length 8 bits; Parity: None; Stop bits: 2