Skyworks Solutions Inc. SI8642BT-IS2R

Overview

SI8642BT-IS2R from Skyworks is a quad-channel, 2-input/2-output digital isolator with reinforced 5 kVRMS isolation, 150 Mbps data rate, <10 ns propagation delay, and fail-safe low-default output mode. It operates across –40 to 125 °C and supports 2.5–5.5 V dual supplies, enabling robust signal isolation in high-noise industrial motor drives and battery management systems.

For engineers reviewing the SI8642BT-IS2R datasheet, SI8642BT-IS2R pinout, SI8642BT-IS2R application, or SI8642BT-IS2R equivalent, this page delivers verified electrical specs, SOIC-16 wide-body (IS2) package details, tri-state enable control logic, and AEC-Q100-qualified automotive-grade alternatives for safety-critical power conversion designs.

Technical Context

The SI8642BT-IS2R implements RF-based on/off keying across a silicon-die isolation barrier-eliminating startup initialization and delivering superior CMTI (≥60 kV/µs) versus optocouplers. Its architecture supports independent VDD1/VDD2 supplies with undervoltage lockout (UVLO) on both sides, ensuring deterministic behavior during asymmetric power sequencing.

With two input channels on Side A and two output channels on Side B, it integrates EN1/EN2 enable inputs per side for independent tri-state control of A3/A4 and B1/B2 outputs. The IS2 package provides 8 mm creepage in standard WB SOIC-16 footprint via tie-bar elimination-enabling reinforced insulation without PCB layout changes.

Key Specifications

Pinout & Package

SI8642BT-IS2R uses a RoHS-compliant 16-pin wide-body SOIC package (IS2 variant) with 8 mm creepage, standard WB SOIC-16 land pattern, and no tie bars-preserving PCB compatibility while meeting reinforced insulation standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8642BD-IS2R, SI8642BT-IS2R adds VDE 0884-10 reinforced certification and 10 kV surge capability - critical for EV traction systems. Versus ISO7742FQDWRQ1, it delivers 50% higher data rate and 3 ns lower typical propagation delay, enabling tighter control loop timing in next-gen inverters.

Availability

SI8642BT-IS2R is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified isolation performance.

Supply support for SI8642BT-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 for high-reliability applications.

The Si864x family was designed specifically for safety-critical isolation in automotive electrification and industrial automation - delivering reinforced insulation, AEC-Q100 qualification, and ultra-low power at multi-Mbps data rates.

FAQ

What is the isolation rating and certification status of SI8642BT-IS2R?

SI8642BT-IS2R provides 5 kVRMS reinforced isolation certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1. It also meets IEC 62368-1 and IEC 60601-1 for medical and IT equipment. The "T" suffix denotes reinforced VDE 0884-10 compliance and 10 kV surge capability - confirmed in Skyworks' official datasheet Section 1. Ordering Guide and Table 4.8.

Does SI8642BT-IS2R support fail-safe operation, and what is its default output state?

Yes, SI8642BT-IS2R features selectable fail-safe mode via ordering option: the "T" variant specifies low-default output during VDD1 loss. When input-side power fails, B1 and B2 hold low (not high-impedance) while VDD2 remains active - preventing unintended activation of downstream power switches. This behavior is defined in Table 3.1 and Section 3.4 of the SI864x datasheet.

What package type does SI8642BT-IS2R use, and how does IS2 differ from standard WB SOIC-16?

SI8642BT-IS2R uses the IS2 variant of the 16-pin wide-body SOIC package. Unlike standard WB SOIC-16 (IS), IS2 eliminates internal tie bars - increasing creepage distance to 8 mm while retaining identical footprint and land pattern. This enables reinforced insulation without PCB redesign, as documented in Note 4 of Table 1.1 and Package Outline drawings on page 30 of the datasheet.

How many enable inputs does SI8642BT-IS2R have, and what do they control?

SI8642BT-IS2R has two enable inputs: EN1 controls tri-state behavior of outputs A3 and A4 on Side A; EN2 controls B1 and B2 on Side B. Both are active-high, internally pulled up to their respective VDD supplies. When asserted, outputs follow input states; when de-asserted, outputs enter high-impedance - enabling flexible bus sharing and power sequencing. Confirmed in Table 3.2 and Section 3.5.

Is SI8642BT-IS2R qualified for automotive applications, and what evidence supports this?

Yes, SI8642BT-IS2R is AEC-Q100 qualified (Grade 1, –40 to 125 °C) and supported with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect manufacturing flows. The "T" suffix correlates to reinforced VDE 0884-10 - explicitly listed in the Automotive OPNs column of Table 1.1 alongside "-AU" automotive-grade variants. Skyworks confirms automotive qualification in Section 1 and Safety Regulatory Approvals.