Vollgo SI4438S4S-V1-B1C

SI4438S4S series of wireless modules is a high-performance wireless transceiver chip designed with compact size, low power consumption, and long range. It is a separate two-way wireless transceiver module. The device is a high performance, low current RF transceiver covering 425 to 525 MHz Band. It is mainly aimed at China's smart meter reading market, especially suitable for electricity meters. Modules feature up to +20 dBm output power with as low as -124 dBm high receiving sensitivity, ensuring a robust communications link budget under adverse operating conditions. The working parameter configuration of this module is very flexible, and the specific configuration file can be generated by Silicon Labs Wireless Development Suite (WDS) tool. The module integrates all radio frequency related functions and devices. Users can use this module to easily develop stable performance, determined and highly reliable wireless solutions and wireless IoT devices without having an in-depth understanding of radio frequency circuit design.

• Frequency range: 425–525 MHz
• Best receiving sensitivity: –124 dBm
• Support modulation method (G)FSK OOK
• Maximum output power +20 dB
• Low receive current: 14 mA receive current
• Low power mode: shutdown mode 30 nA, sleep mode is less than 1 uA
• Communication rate: 100 bps to 500 Kbps programmable configuration
• Wide supply voltage range: 1.8 to 3.8 V
• Tx and RX 64 byte FIFO
• Conform to IEEE 802.15.4g
• Suitable for Chinese regulation

• Logistics tracking
• Warehouse inspection
• Electronic labels
• Substitute 232, 485 to perform wireless data communications
• Wireless data collection and control of industrial instruments
• AMR (water, electricity, gas) three meter reading
• Buildings and Housing (Smart Home) control
• Wireless remote control for consumer electronics products
• Wireless Alarm and Security Systems
• Wireless sensor network