Skyworks Solutions Inc. SI8462AB-B-IS1

Overview

SI8462AB-B-IS1 from Skyworks Solutions is a six-channel, ultra-low-power digital isolator in a 16-pin narrow-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay under 9.5 ns, <1.5 ns pulse width distortion, and 0.5 ns channel-to-channel skew-designed for high-speed isolated communication in industrial motor control and isolated ADC interfaces.

For engineers reviewing the SI8462AB-B-IS1 datasheet, SI8462AB-B-IS1 pinout, SI8462AB-B-IS1 application, or SI8462AB-B-IS1 equivalent, key selection criteria include its 2.7–5.5 V dual-supply operation, 2500 VRMS reinforced insulation rating (UL/CSA/VDE certified), 25 kV/µs common-mode transient immunity, and guaranteed performance across –40 to +125 °C at full speed.

Technical Context

The SI8462AB-B-IS1 implements capacitive isolation with on-chip RF modulation/demodulation circuitry, enabling DC-to-150 Mbps signal transmission without start-up initialization. Its architecture delivers stable timing parameters-including propagation delay skew ≤3.0 ns and channel skew ≤1.8 ns-across supply voltages (2.7 V, 3.3 V, 5 V) and temperature (–40 to 125 °C).

It features bidirectional or unidirectional channel configuration per side (configurable via internal logic), 85 Ω nominal output impedance for controlled-impedance PCB routing, and integrated ESD protection (±10 µA input leakage). Safety isolation is achieved via double-dielectric barrier construction validated to IEC 60747-5-2, UL 1577, and CSA 5A standards.

Key Specifications

Pinout & Package

The SI8462AB-B-IS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC package (5.3 mm width, JEDEC MS-013AC), with creepage and clearance ≥3.9 mm and internal isolation barrier rated for 2500 VRMS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM260N1BRIZ and ISO6760FDWR, the SI8462AB-B-IS1 uniquely balances 150 Mbps speed, 125 °C full-rate operation, and sub-15 mA 100 Mbps consumption-making it optimal for space-constrained, high-performance industrial inverters where thermal headroom and timing fidelity are critical.

Availability

SI8462AB-B-IS1 is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle power inverters, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI8462AB-B-IS1 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 designed specifically for high-reliability, high-speed digital isolation in industrial automation, automotive electrification, and energy infrastructure-replacing optocouplers with robust, low-power, and temperature-stable alternatives.

FAQ

What is the maximum operating temperature for full-speed operation of the SI8462AB-B-IS1?

The SI8462AB-B-IS1 is fully specified for 150 Mbps operation across –40 to +125 °C ambient temperature, with propagation delay, skew, and supply current values guaranteed over this range per Tables 3–5 in the datasheet. This makes SI8462AB-B-IS1 suitable for under-hood automotive and high-temperature industrial environments where legacy isolators derate speed above 105 °C.

Does the SI8462AB-B-IS1 require external pull-up or pull-down resistors on its input pins?

No, the SI8462AB-B-IS1 does not require external pull-up or pull-down resistors on IN1–IN6. Its inputs have defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds with ±10 µA leakage, allowing direct connection to CMOS/TTL outputs. External biasing is only needed if driving from open-drain sources or floating nodes-otherwise, SI8462AB-B-IS1 operates reliably with clean digital signals.

How is the isolation barrier in the SI8462AB-B-IS1 constructed, and what safety standards does it meet?

The SI8462AB-B-IS1 uses capacitive isolation with dual silicon-dioxide dielectric barriers fabricated on separate dies, achieving 2500 VRMS working voltage. It is certified to UL 1577 (File E257455), CSA Component Notice 5A (IEC 61010-1), and VDE 0884-2 (IEC 60747-5-2), with production-tested withstand voltage of 3000 VRMS for 1 second-ensuring compliance in Class I industrial equipment and EV subsystems.

Can the SI8462AB-B-IS1 support bidirectional communication on individual channels?

No, the SI8462AB-B-IS1 provides six unidirectional channels-three fixed from side 1 to side 2 (IN1–IN3 → OUT1–OUT3) and three fixed from side 2 to side 1 (IN4–IN6 → OUT4–OUT6). Bidirectional protocols like I²C require external logic or a different device (e.g., Si866x series); SI8462AB-B-IS1 is optimized for high-speed, low-latency unidirectional signal transfer such as PWM, SPI, or status flags.

What is the recommended PCB layout practice for minimizing emissions and maximizing CMTI performance of the SI8462AB-B-IS1?

To maximize CMTI and minimize emissions, maintain ≥8 mm clearance between primary and secondary side traces, use solid ground planes on both sides separated only by the isolation barrier, route IN/OUT pairs differentially where possible, and place 100 nF ceramic bypass capacitors ≤5 mm from each VDD pin to its respective GND pin. Avoid routing noisy traces (e.g., gate drivers) parallel to isolator traces-SI8462AB-B-IS1 achieves 25 kV/µs CMTI only when layout follows Skyworks' AN116 guidelines.