Skyworks Solutions Inc. SI86S640BE-IS2R

Overview

SI86S640BE-IS2R from Skyworks Solutions is a 4-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It supports DC to 150 Mbps data rates, delivers 10 ns typical propagation delay, and provides 6000 VRMS isolation rating in a WB SOIC-16 package. It operates from 2.25–5.5 V supplies and is used in isolated motor control gate drivers and battery management system communication interfaces.

For engineers reviewing the SI86S640BE-IS2R datasheet, SI86S640BE-IS2R pinout, SI86S640BE-IS2R application, or SI86S640BE-IS2R equivalent, key selection criteria include reinforced IEC 60747-17 certification, fail-safe default-low output configuration, 36 ns input deglitch filtering, and compatibility with isolated SPI and industrial fieldbus interfaces requiring high CMTI (>100 kV/µs) and extended temperature operation (–40 to 125 °C).

Technical Context

The SI86S640BE-IS2R implements RF-based on/off keying modulation across a monolithic silicon dioxide isolation barrier, eliminating start-up initialization and enabling deterministic timing behavior. Its architecture includes Schmitt-trigger inputs with 0.15 × VDD hysteresis and CMOS-compatible thresholds for robust noise immunity in noisy industrial environments.

It features dual supply domains (VDD1/GND1 and VDD2/GND2), independent undervoltage lockout (UVLO) per side with 2.10–2.25 V rising threshold, and a dedicated fail-safe mode that forces outputs low when Side A is unpowered but Side B remains active - confirmed by ordering code suffix "E".

Key Specifications

Pinout & Package

SI86S640BE-IS2R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and clearance, supporting 6000 VRMS reinforced isolation. Pin assignments follow the Si86S64x family layout shown in Figure 2 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Compared with SI86S640BE-IS2R, ADUM140D0BRWZ offers lower isolation and no hardware deglitching, while ISO6741FDWR trades speed and certified reinforced rating for TI's process maturity and broad distribution - neither matches SI86S640BE-IS2R's combination of 6000 VRMS, 150 Mbps, and factory-configured default-low fail-safe with 36 ns filtering.

Availability

SI86S640BE-IS2R is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management systems, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for SI86S640BE-IS2R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.

The Si86S6xx family was designed specifically for high-reliability industrial and automotive isolation applications demanding reinforced safety certification, high CMTI, and deterministic timing - SI86S640BE-IS2R implements this architecture in a 4-channel, default-low fail-safe variant.

FAQ

What is the isolation rating and safety certification status of SI86S640BE-IS2R?

SI86S640BE-IS2R provides 6000 VRMS reinforced isolation per UL 1577 and is certified to IEC 60747-17. It also meets CSA 62368-1 and 60601-1, and CQC GB4943.1 requirements. These certifications are documented in Skyworks' official safety reports and apply directly to the SI86S640BE-IS2R part number in its WB SOIC-16 package.

Does SI86S640BE-IS2R require external start-up initialization or configuration?

No, SI86S640BE-IS2R uses RF-based on/off keying and requires no firmware, register writes, or clock initialization. It begins passing data within 0.3 ms after VDD exceeds the 2.10 V UVLO+ threshold. This behavior is inherent to the SI86S640BE-IS2R silicon architecture and is verified across –40 to 125 °C.

What does the "E" suffix in SI86S640BE-IS2R indicate?

The "E" suffix denotes the factory-configured fail-safe mode: outputs default to logic low when Side A (VDD1) is unpowered but Side B (VDD2) remains active. This setting is permanently programmed during manufacturing and applies to all four channels of SI86S640BE-IS2R.

Is SI86S640BE-IS2R compatible with 3.3 V and 5 V logic systems?

Yes, SI86S640BE-IS2R operates from 2.25 V to 5.5 V on both sides independently. It accepts 0.3 × VDD low and 0.7 × VDD high input thresholds and drives outputs to VDD − 0.4 V (high) and 0.4 V (low) at 4 mA load - fully interoperable with standard 3.3 V and 5 V CMOS interfaces without level shifters.

What is the purpose of the 36 ns input deglitch filter in SI86S640BE-IS2R?

The 36 ns hardware deglitch filter in SI86S640BE-IS2R rejects transient pulses shorter than 36 ns - a feature confirmed in the Si86S64x family datasheet. It prevents false triggering from EMI in motor drives, relay contact bounce, or switching noise, ensuring only valid logic transitions propagate across the isolation barrier.