Skyworks Solutions Inc. SI8430AB-D-IS

Overview

SI8430AB-D-IS from Skyworks Solutions is a triple-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate with <9.5 ns worst-case propagation delay and 0.5 ns channel-to-channel skew. It operates from 2.70–5.5 V on both sides, achieves <6 mA per channel at 100 Mbps (5 V), and delivers 2500 VRMS reinforced isolation for industrial motor control and isolated ADC interfaces.

For engineers reviewing the SI8430AB-D-IS datasheet, SI8430AB-D-IS pinout, SI8430AB-D-IS application, or SI8430AB-D-IS equivalent, this device is selected for high-speed, low-power galvanic isolation in safety-critical power conversion, automotive subsystems, and precision analog signal conditioning where timing integrity and CMTI >25 kV/µs are required.

Technical Context

The SI8430AB-D-IS implements capacitive isolation using differential RF signaling across an internal SiO₂ barrier, enabling robust noise immunity without magnetic or optical coupling. Its architecture supports independent supply domains (VDD1/VDD2), true bidirectional channel operation, and integrated enable control with sub-8 ns enable-to-output response.

All three channels share identical timing performance: 6.0 ns typical propagation delay, 1.5 ns pulse width distortion, and 2 ns propagation delay skew across temperature (–40 to +125 °C) and supply (2.7–5.5 V). The device requires only 0.1 µF bypass capacitors per supply rail and no startup initialization sequence.

Key Specifications

Pinout & Package

SI8430AB-D-IS is housed in a RoHS-compliant 16-pin wide-body SOIC package (package width 10.3 mm, creepage/clearance ≥8.0 mm), certified for reinforced insulation per VDE 0884-2 and UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM1300ARWZ and ISO6731FDWR, SI8430AB-D-IS uniquely balances 150 Mbps bandwidth, sub-10 ns timing, and AEC-Q100 qualification-making it optimal for next-generation EV inverters and high-fidelity isolated data acquisition where speed, skew, and automotive reliability converge.

Availability

SI8430AB-D-IS is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle battery management, and isolated switch-mode power supply designs requiring stable component supply and long-term lifecycle support.

Supply support for SI8430AB-D-IS 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 Si84xx family was engineered for high-reliability, high-speed galvanic isolation in power electronics and automotive systems-replacing optocouplers with superior speed, longevity, and temperature stability.

FAQ

What is the maximum data rate supported by SI8430AB-D-IS?

The SI8430AB-D-IS supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40 to +125 °C, CL = 15 pF). This is confirmed in Table 3's timing characteristics for Si843xBx variants, and the "B" suffix in SI8430AB-D-IS explicitly denotes the 150 Mbps speed grade. Performance remains stable across its full operating temperature and supply range.

Does SI8430AB-D-IS require external components for basic operation?

No, SI8430AB-D-IS requires only two 0.1 µF ceramic bypass capacitors-one each on VDD1 and VDD2-to operate reliably. The datasheet states "only VDD bypass capacitors are required," and no pull-up/down resistors, level shifters, or external termination networks are needed for standard CMOS interfacing. Output impedance is internally matched to ~85 Ω, simplifying high-speed layout.

Is SI8430AB-D-IS certified for automotive applications?

Yes, SI8430AB-D-IS is AEC-Q100 qualified (Grade 1: –40 to +125 °C) and carries UL, CSA, and VDE safety certifications supporting reinforced insulation up to 2500 VRMS. These qualifications make it suitable for non-safety-critical but reliability-demanding automotive subsystems such as battery monitoring, HVAC inverter control, and onboard charger communication interfaces.

What is the meaning of the "-D-IS" suffix in SI8430AB-D-IS?

The "-D-IS" suffix indicates the device is packaged in a 16-pin wide-body SOIC (D = wide-body), with lead finish compliant with RoHS and halogen-free standards (IS = industrial standard, Pb-free, green). This matches Skyworks' ordering guide designation for the 2500 VRMS, wide-body variant with enhanced creepage (8.0 mm) and clearance (8.0 mm), distinct from narrow-body (-N) or lower-isolation (-A) versions.

How does the enable (EN) pin function on SI8430AB-D-IS?

The EN pin is an active-high control that places all three outputs (OUT1–OUT3) into high-impedance state when driven low. When enabled (EN = high), outputs respond with ≤8 ns enable-to-data-valid delay (ten1) and ≤9.2 ns enable-to-tri-state delay (ten2). This allows dynamic channel gating in multi-isolator systems without disrupting upstream logic, and is fully characterized across temperature and supply voltage.