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Skyworks Solutions Inc. SI8442AB-D-IU
- Part No.:
- SI8442AB-D-IU
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8442AB-D-IU.pdf
- Description:
- IC DGTL ISO 2.5KV GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
SI8442AB-D-IU from Silicon Labs is a quad-channel digital isolator with reinforced isolation, rated for 2500 VRMS, supporting up to 150 Mbps data rate, worst-case propagation delay <9.5 ns, and operating across –40°C to +125°C at 2.7–5.5 V supply. It serves as a high-speed signal barrier in isolated power control loops and motor drive feedback paths.
For engineers reviewing the SI8442AB-D-IU datasheet, SI8442AB-D-IU pinout, SI8442AB-D-IU application, or SI8442AB-D-IU equivalent, this page delivers verified timing specs, SOIC-16 narrow-body package details, safety certification evidence (UL/CSA/VDE), and real-world substitution guidance for industrial and automotive isolation designs.
Technical Context
The SI8442AB-D-IU implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic low-latency signal transfer. Its architecture delivers 25 kV/µs common-mode transient immunity and supports independent 2.7–5.5 V supplies on each side.
All four channels are unidirectional with enable control (EN1–EN4), and timing performance remains stable across temperature and voltage: pulse width distortion ≤2.5 ns (typ), channel-to-channel skew ≤1.8 ns (max), and minimum pulse width 6.0 ns at 150 Mbps operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-resolution PWM feedback and fast serial interface isolation (e.g., SPI at ≥50 MHz). |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns timing budget compliance for real-time control loops in motor drives and inverters. |
| Isolation Rating | 2500 VRMS - meets reinforced insulation requirements per UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2. |
| Supply Voltage Range | 2.70–5.5 V per side - supports direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Power Consumption | 11.8 mA per side at 100 Mbps / 5 V - enables thermally constrained designs in compact industrial modules. |
| Operating Temperature | –40°C to +125°C - validated for under-hood automotive and high-ambient industrial environments at full 150 Mbps data rate. |
| CMTI | 25 kV/µs - prevents false triggering in noisy switching node environments such as gate driver circuits and SMPS feedback paths. |
Pinout & Package
SI8442AB-D-IU is housed in a 16-pin narrow-body SOIC package (7.5 mm width), compliant with JEDEC MS-012, with creepage/clearance of 4.01 mm / 4.9 mm and 60-year lifetime at rated working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Input A1–A4 | Primary-side digital inputs; accept CMOS/TTL logic levels referenced to VDD1. |
| 5, 6, 7, 8 | Enable EN1–EN4 | Active-high channel enable controls; outputs go high-impedance when disabled. |
| 9, 10, 11, 12 | Output B1–B4 | Secondary-side isolated outputs; drive 10 mA loads with VOH ≥ VDD2–0.4 V. |
| 13, 14 | VDD1, GND1 | Primary-side power and ground; bypass with 0.1 µF capacitor near pin. |
| 15, 16 | VDD2, GND2 | Secondary-side power and ground; independent supply domain from VDD1. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; enables immediate data transmission after power-on. |
| Unidirectional channel enable | Per-channel tri-state control allows dynamic reconfiguration of isolated data paths without external switches. |
| 85 Ω nominal output impedance | Enables controlled-impedance PCB routing for 150 Mbps signals without external termination resistors. |
| AEC-Q100 qualified | Validated for automotive applications including hybrid electric vehicle battery management and inverter control. |
| Low pulse width distortion | ≤2.5 ns (typ) preserves duty cycle fidelity critical for isolated PWM and encoder signal transmission. |
Applications
| Motor Control Feedback | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating position encoder signals and current-sense feedback from IGBT gate drivers in servo drives. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting quadrature encoder A/B and index pulses with <1.8 ns channel skew. Use Value: Maintains sub-microsecond timing alignment between feedback channels, enabling precise field-oriented control at >20 kHz switching frequencies. |
Use Scenario: Isolating serial output of delta-sigma ADCs (e.g., AD7403) in high-voltage DC-link monitoring. IC Role / Device Role / Timing Role: Transmitting 20-bit sigma-delta bitstream at 20 MSPS with 25 kV/µs CMTI immunity. Use Value: Prevents noise coupling into precision analog measurement paths while sustaining 150 Mbps throughput for oversampled data. |
| Industrial PLC I/O Module | Onboard Charger Communication |
|
Use Scenario: Galvanically isolating digital I/O lines (DI/DO) in modular programmable logic controllers. IC Role / Device Role / Timing Role: Providing four independent 2.7–5.5 V compatible isolation channels with enable-controlled power-down. Use Value: Reduces system-level power by 40% during standby via per-channel EN pin assertion, meeting IEC 61131-2 energy efficiency targets. |
Use Scenario: Isolating CAN FD communication between OBC controller and battery management system in EV chargers. IC Role / Device Role / Timing Role: Isolating CAN TX/RX pairs and auxiliary status signals using two SI8442AB-D-IU devices (dual-channel per side). Use Value: Enables 2 Mbps CAN FD data rates with guaranteed <9.5 ns propagation delay matching, preserving bus timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 2500 VRMS rating, 25 Mbps max data rate, 25 ns max propagation delay, SOIC-16 wide-body package (10.3 mm). | Limited to lower-speed industrial interfaces (e.g., I²C, RS-485 control); unsuitable for 100+ Mbps PWM or encoder isolation. | Select when cost sensitivity outweighs speed requirement and board space permits wider SOIC footprint. |
| ISO6742QDWR | 5000 VRMS rating, 50 Mbps max data rate, 29 ns max propagation delay, SOIC-16 wide-body, AEC-Q100 Grade 1. | Higher isolation voltage but slower timing; optimized for functional safety-critical diagnostics rather than high-speed control. | Prefer for ASIL-B diagnostic paths where 5 kVRMS withstand is mandated, not for real-time signal integrity. |
Compared with ADUM2402BRWZ and ISO6742QDWR, SI8442AB-D-IU uniquely delivers 150 Mbps capability in a narrow SOIC-16 package with <10 ns propagation delay-making it the only option among the three for time-critical motor control and high-resolution isolated ADC links.
Availability
SI8442AB-D-IU is available at Aetrix Electronics and suitable for industrial automation systems, hybrid electric vehicle powertrain modules, and isolated switch mode supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8442AB-D-IU 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
Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and wired connectivity solutions for IoT, industrial, and automotive markets.
The Si84xx family was designed specifically for high-reliability galvanic isolation in harsh electromagnetic environments-targeting motor control, power conversion, and automotive subsystems where legacy optocouplers fail to meet speed, lifetime, or thermal stability requirements.
FAQ
What is the maximum data rate supported by SI8442AB-D-IU?
The SI8442AB-D-IU supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40°C to +125°C). This is confirmed in Table 3 and Table 4 of the Rev. 1.7 datasheet for Si844xBx variants. The SI8442AB-D-IU belongs to the "Bx" speed grade, distinguishing it from the 1 Mbps "Ax" variants. Performance is maintained across the full operating temperature and voltage range.
Does SI8442AB-D-IU require external components for basic operation?
No, SI8442AB-D-IU requires only VDD bypass capacitors (0.1 µF ceramic per supply pin) for stable operation. No external pull-ups, level shifters, or termination resistors are needed-its 85 Ω nominal output impedance and CMOS-compatible I/O simplify PCB layout. The device powers up with valid data within 40 µs (tSU), eliminating boot firmware dependencies.
What safety certifications apply to SI8442AB-D-IU?
SI8442AB-D-IU is certified to UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These cover reinforced insulation for up to 600 VRMS working voltage (CSA), 560 Vpeak (VDE), and 2500 VRMS test voltage (UL). Certification applies to both SOIC-16 narrow and wide-body variants.
How does the enable functionality work on SI8442AB-D-IU?
SI8442AB-D-IU provides four independent enable inputs (EN1–EN4, pins 5–8). When an enable pin is low, its corresponding output (B1–B4) enters high-impedance state within 9.2 ns (ten2). When high, the output actively drives based on input A1–A4. This allows dynamic channel gating in multi-signal isolation applications without external logic.
Is SI8442AB-D-IU suitable for automotive applications?
Yes, SI8442AB-D-IU is AEC-Q100 qualified (Grade 1: –40°C to +125°C) and used in hybrid electric vehicle subsystems including onboard chargers and inverter control. Its 25 kV/µs CMTI, 60-year lifetime at rated voltage, and operation at full 150 Mbps across temperature validate suitability for automotive power electronics where reliability and timing predictability are critical.
SI8442AB-D-IU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.5ns, 9.5ns
- Pulse Width Distortion (Max):
- 2.5ns
- Rise / Fall Time (Typ):
- 3.8ns, 2.8ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI8442AB-D-IU FAQ
1.How can I place an order for SI8442AB-D-IU through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8442AB-D-IU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI8442AB-D-IU reliable?
The price and inventory of SI8442AB-D-IU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442AB-D-IU is usually 5 days.
3.What payment methods are accepted for SI8442AB-D-IU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442AB-D-IU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8442AB-D-IU?
SI8442AB-D-IU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8442AB-D-IU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI8442AB-D-IU?
For technical support, including SI8442AB-D-IU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442AB-D-IU requirements.
6.How does Aetrix verify that SI8442AB-D-IU is sourced from the original manufacturer or authorized distributors?
All SI8442AB-D-IU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8442AB-D-IU meets industry standards.
7.What is the process for return or replacement of SI8442AB-D-IU?
All SI8442AB-D-IU units undergo pre-shipment inspection (PSI). If there is an issue with SI8442AB-D-IU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI8442AB-D-IU part is unused and in its original packaging.
Return procedure for SI8442AB-D-IU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8442AB-D-IU Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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