Product Overview

The SI4438-C2A-GMR is a high-performance, low-current wireless transceiver designed for sub-GHz IoT applications, operating in the 425–525 MHz frequency range. Supporting GFSK/OOK modulation, it offers exceptional receive sensitivity, efficient power output, and flexible configuration, ideal for smart meters, industrial sensors, and remote monitoring systems with strict requirements for power consumption and communication stability.

Key Features

• Superior RF Performance: Supports +20 dBm transmit power and -124 dBm receive sensitivity (500 bps, GFSK), combined with 58 dB adjacent channel selectivity and 75 dB blocking rejection, ensuring long-range stable communication and strong anti-interference capability.
• Ultra-Low Power Design: Standby current as low as 40 nA, shutdown current only 30 nA, and Preamble Sense Mode enabling average receive current of 6 mA at 1.2 kbps, significantly extending battery life.
• Flexible Modulation & Configuration: Supports GFSK/OOK modulation with data rates from 100 bps–500 kbps, integrated 64-byte TX/RX FIFOs and programmable packet handler, adapting to various communication protocols.
• Anti-Fading & Diversity: Integrated antenna diversity control automatically selects the best receiving antenna, enhancing signal stability in complex environments; supports fast frequency hopping for dynamic spectrum adaptation.
• High Integration & Simplified Design: Built-in temperature sensor, low-battery detector, and 30 MHz crystal oscillator with minimal external components, compliant with IEEE 802.15.4g and China State Grid requirements, reducing development costs.

Technical Specifications

Typical Applications

• Smart Meters: Ideal for China’s smart grid remote meter reading systems, leveraging high sensitivity and low power to enable stable wireless communication between meters and concentrators, supporting long-range transmission and multi-node networking.
• Industrial Sensor Networks: Connects temperature, pressure, and other sensors in factory automation, ensuring reliable data transmission in complex industrial environments via GFSK modulation and anti-interference design, while low-power modes extend device runtime.
• Remote Monitoring & Control: Used in wireless monitoring devices for buildings, agriculture, etc., supporting flexible frequency configuration and fast wake-up to respond to external events in real time, minimizing system-wide power consumption.

Why Choose SI4438-C2A-GMR?

• Extreme Performance Balance: Combines +20 dBm power and -124 dBm sensitivity for a 144 dB link budget, extending coverage by 30% compared to similar products, suitable for long-distance communication.
• Ultra-Low Power Optimization: Multiple low-power modes adapt to battery-powered scenarios, with standby current as low as 40 nA. Pre-wake timer and low duty cycle mode significantly extend device operation life.
• Flexible Protocol Support: Programmable packet handler supports custom preamble, sync word, and CRC, compatible with proprietary protocols and IEEE 802.15.4g, simplifying multi-protocol development.
• High Reliability Design: Integrated antenna diversity algorithm and automatic gain control (AGC) reduce multipath fading effects, enhancing signal reception stability in challenging environments.
• Rapid Development & Deployment: Provides complete EZRadioPRO API support, reference designs, and global certifications (e.g., China SRRC), accelerating product development and reducing certification costs.

SUNTOP COMPANY INTRODUCTION

Founded in 2000, Suntop is one of the leading global distributors of electronic
components, dedica ted to providing comprehensive procurement and supply chain services to the global electronics manufacturing industry. Our services include distribution, spot trading, PPV cost-saving projects, and inventory management. We not only offer high-quality products but also strive to assist our clients in achieving optimal solutions with minimal time and cost.
As a trusted partner for numerous OEMs, ODMs, CEMs, and EMS companies worldwide, our professional team manages millions of component records from thousands of trading partners across dozens of countries daily through our company database. We maintain close business relationships with major factories and distributors in North America, Europe, and Asia to ensure that our clients stay ahead in a highly competitive market.