SI3233-C-FM

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The SI3233-C-FM is a three-channel digital isolator for telecom applications. This digital isolator is designed for bidirectional transmission of digital signals between two isolated nodes, allowing for a wide range of applications in the telecom industry. This article will discuss the SI3233-C-FM\'s application field and working principle.

Application Field of SI3233-C-FM

The SI3233-C-FM is designed to provide galvanic isolation in order to protect against ground loops and to provide reliable data transfer between two isolated nodes. The SI3233-C-FM is commonly used in telecom applications, such as public switched telephone network (PSTN), cellular base station infrastructure, broadband access, and data communications. The SI3233-C-FM can be employed in a variety of applications that require isolation between digital signals and ground, such as interface circuit protection, clock signal isolation, and signal transmission between DC-DC converters.

The SI3233-C-FM is suitable for applications with a power supply of 3.3 V, which makes it an ideal digital isolator for low voltage applications. It features a wide common mode voltage range of −8 to 22 V, which allows it to reliably transmit digital signals even when the voltages on both sides of the isolation barrier become imbalanced. In addition, the SI3233-C-FM is designed to meet the stringent safety requirements of many telecom applications, with a high dielectric withstand voltage rating of 1,500 Vrms, 2.5KVrms right-cross test voltage rating, and a safe isolation voltage rating of 1,000 Vrms.

Working Principle of SI3233-C-FM

The SI3233-C-FM is designed to safely isolate and transmit digital signals between two nodes digitally. It consists of an input side and an output side, both isolated from each other. The input side features an isolated driver and three isolated receivers, while the output side features three isolated drivers and an isolated receiver. The input and output sides are connected by an isolation barrier.

The SI3233-C-FM employs a state-of-the-art digital isolation technique to provide reliable digital signal transmission. This technique utilizes capacitive coupling with high-voltage isolation to reduce the coupled noise and ensure uninterrupted signal transmission. The output side consists of three isolated drivers each capable of driving up to 5 mA of load current. The input side consists of three isolated receivers that are designed to detect logical high and low levels accurately.

The SI3233-C-FM is designed to safely isolate and protect digital signals between two nodes. It is designed to meet the safety requirements of telecom applications, with its stringent isolation ratings. It is suitable for applications with a 3.3V power supply and features a wide common mode voltage range, allowing it to reliably transmit digital signals even when the voltages on both sides of the isolation barrier become imbalanced. It employs capacitive coupling with high-voltage isolation, reducing coupled noise and ensuring uninterrupted signal transmission.

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