SI8645BB-B-IU

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Digital isolators are electronic devices that provide isolation between two systems. Isolation can be used to reduce the risk of electrical shock and protect against electromagnetic interference. The SI8645BB-B-IU is a digital isolator that combines integrated MOSFETs and a digital logic gate to switch a voltage signal from one system to another. It is designed to deliver isolation of up to 2.5kV RMS, with an operating voltage of 5.5 V DC.

The SI8645BB-B-IU is designed for use in high-voltage and EMI-sensitive applications, such as medical, telecom, and automotive. Its primary function is to transmit and receive digital signals, such as logic status signals, between two isolated electrical systems with varying levels of voltage, without the risk of damage due to electrical shock or electromagnetic interference. Due to its high-speed transmission of up to 60Mb/s and high isolation of up to 2.5kV RMS, the SI8645BB-B-IU is particularly well-suited for industrial automation, medical and automotive applications.

The SI8645BB-B-IU’s working principle is based on the gate-controlled high-side switch and low-side switch design. It employs an integrated MOSFET, or power transistor, as the isolating device. The gate-controlled MOSFET, in turn, is controlled by a logic gate, which acts as the brain behind the power switch. The logic gate switches the signal between two isolated systems through the gate-controlled MOSFET. The result is an electrically isolated digital information link.

The SI8645BB-B-IU also uses an advanced Integrated Circuit (IC) structure to provide superior performance and higher reliability. This includes an on-chip data (DRAM) buffer which further isolates the digital signal from the logic gate. The IC structure also includes thermal protection and under-voltage lockout (UVLO) protection for improved safety. The SI8645BB-B-IU is designed such that it can be easily integrated into a variety of designs and applications, as it features an extended temperature range capability (-40 to +85°C). It also features a low propagation delay (<1μs) for fast data transmission.

The SI8645BB-B-IU is a highly reliable, isolating power switch which is designed to provide efficient transmission of digital signals between two isolated systems. Its Integrated Circuit design provides superior performance, while its gate-controlled high-side switch and low-side switch design ensures efficient and safe information transmission. It is designed for use in a variety of industrial, telecom, medical, and automotive applications.

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