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Skyworks Solutions Inc. SI8442BA-D-IUR
- Part No.:
- SI8442BA-D-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8442BA-D-IUR.pdf
- Description:
- DGTL ISO 1000VRMS 4CH GP 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,055
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Product details
Overview
SI8442BA-D-IUR from Skyworks Solutions is a four-channel digital isolator with bidirectional channel configuration, 150 Mbps maximum data rate, <9.5 ns worst-case propagation delay, and 1000 VRMS isolation rating in a 16-pin QSOP package. It serves as a high-speed signal barrier in isolated power supply feedback loops and motor gate driver interfaces.
For engineers reviewing the SI8442BA-D-IUR datasheet, SI8442BA-D-IUR pinout, SI8442BA-D-IUR application, or SI8442BA-D-IUR equivalent, key selection criteria include channel count (4), supply voltage range (2.7–5.5 V), CMTI (25 kV/µs), and QSOP-16 thermal performance (θJA = 105 °C/W) under industrial temperature operation (–40 to 125 °C).
Technical Context
The SI8442BA-D-IUR implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating start-up initialization and enabling deterministic timing without external clocks or calibration. Each channel operates independently with separate input and output supplies (VDD1/VDD2), supporting asymmetric voltage domains.
It features integrated enable control per side, high-impedance output states during disable, and precise timing metrics: 1.5 ns typical pulse width distortion, 0.5 ns typical channel-to-channel skew, and 2 ns propagation delay skew - all guaranteed over full temperature and voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent unidirectional or bidirectional channels; supports mixed-direction configurations per datasheet Table 12. |
| Max Data Rate | 150 Mbps - enables real-time control loop closure in servo drives and fast ADC/DAC isolation. |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns latency for time-critical gate drive and feedback signals. |
| Isolation Rating | 1000 VRMS (1 min) - certified to UL 1577, VDE IEC 60747-5-2, and CSA 5A for reinforced insulation systems. |
| Supply Voltage | 2.70–5.5 V per side - allows direct interface with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| CMTI | 25 kV/µs - sustains reliable operation in noisy motor inverter and SMPS environments with rapid dv/dt transients. |
| Operating Temp | –40 to 125 °C at 150 Mbps - validated for under-hood automotive and industrial ambient conditions. |
Pinout & Package
SI8442BA-D-IUR is housed in a 16-pin QSOP package (3.9 mm × 9.9 mm, 1.0 mm height) with 1.27 mm pitch, RoHS-compliant, and qualified per JEDEC MS-013. Pin functions are defined per Skyworks Si844x/5x datasheet Rev. 1.2, Section 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input logic and transmitter; must be decoupled with 0.1 µF capacitor near pin. |
| GND1 | Input-side ground | Reference return for VDD1 and input signals; separate from GND2 to maintain isolation integrity. |
| IN1–IN4 | Input signal terminals | Accept CMOS/TTL logic levels; VIH ≥ 2.0 V, VIL ≤ 0.8 V; support 500 kHz–150 MHz square wave inputs. |
| VDD2 | Output-side supply | Power for receiver and output drivers; independent of VDD1, enabling dual-voltage domain operation. |
| GND2 | Output-side ground | Reference return for VDD2 and outputs; galvanically isolated from GND1 by internal barrier. |
| OUT1–OUT4 | Output signal terminals | CMOS-compatible outputs; VOH ≥ VDD2 – 0.4 V, VOL ≤ 0.4 V; 85 Ω nominal output impedance. |
| EN | Enable control input | Active-high enable on output side; drives outputs to Hi-Z when low - critical for safe power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift issues of optocouplers; no start-up delay or initialization required. |
| Ultra-low power at high speed | 11.8 mA per side at 100 Mbps / 5 V - reduces thermal load in dense PCB layouts and extends battery life in portable isolators. |
| Precision timing control | 0.5 ns typical channel-to-channel skew and 1.5 ns pulse width distortion - enables synchronous multi-axis motor control. |
| High CMTI immunity | 25 kV/µs common-mode transient immunity - prevents false triggering in 650 V+ IGBT/SiC inverter gate drive circuits. |
| QSOP-16 footprint compatibility | Drop-in replacement for legacy optocouplers and competing digital isolators using same land pattern (JEDEC MO-137). |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Gate driving for three-phase PMSM inverters with field-oriented control. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU to isolated gate drivers while preserving edge fidelity and skew. Use Value: Enables 150 Mbps PWM update rates with <9.5 ns propagation delay, reducing torque ripple and improving dynamic response. |
Use Scenario: Secondary-side voltage/current feedback to primary-side controller in AC/DC adapters. IC Role / Device Role / Timing Role: Transmits isolated analog sensor data (via isolated ADC) and error signals across safety barrier. Use Value: Maintains 1000 VRMS isolation while supporting fast transient response (<10 ns delay) for tight regulation loops. |
| Isolated Data Acquisition | Communications Interface Isolation |
|
Use Scenario: High-resolution isolated ADC front-end in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Digitally isolates serial interface (SPI or parallel bus) between ADC and host processor. Use Value: Guarantees 150 Mbps throughput and 25 kV/µs CMTI to prevent data corruption in electrically noisy factory floors. |
Use Scenario: RS-485 transceiver isolation in distributed industrial networks. IC Role / Device Role / Timing Role: Isolates differential data lines and control signals (DE/RE) between PHY and controller. Use Value: Supports full-duplex 25 Mbps RS-485 operation with matched channel delays, minimizing inter-symbol interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1402ARWZ | 4-channel, 100 Mbps max, SOIC-16, 25 kV/µs CMTI, 1000 VRMS isolation | Limited to 100 Mbps; higher propagation delay (typ. 25 ns); wider SOIC-16 body (10.3 mm) | Preferred where lower cost and legacy SOIC footprint are prioritized over 150 Mbps speed. |
| ISO6741QDWR | 4-channel, 50 Mbps max, SOIC-16, 1000 VRMS, 50 kV/µs CMTI, AEC-Q100 qualified | Lower speed; automotive-grade qualification; higher CMTI but slower timing | Suitable for automotive body electronics requiring AEC-Q100 compliance, not for high-speed motor control. |
Compared with ADUM1402ARWZ and ISO6741QDWR, SI8442BA-D-IUR delivers 50% higher data rate and tighter timing (sub-10 ns delay vs. >25 ns), making it optimal for closed-loop servo systems and fast-switching SiC/GaN power stages where latency and skew directly impact stability.
Availability
SI8442BA-D-IUR is available at Aetrix Electronics and suitable for industrial motor control, isolated power supply feedback, and high-speed data acquisition requiring stable component supply and long-term lifecycle support.
Supply support for SI8442BA-D-IUR 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 Si844x family was designed specifically for high-reliability industrial and automotive isolation applications demanding ultra-low latency, high CMTI, and extended temperature operation without optical degradation.
FAQ
What is the maximum data rate supported by SI8442BA-D-IUR?
The SI8442BA-D-IUR supports a maximum data rate of 150 Mbps across all four channels, verified under worst-case conditions (–40 to 125 °C, 5 V supply, 15 pF load). This rating is guaranteed per Skyworks datasheet Rev. 1.2, Table 3 timing characteristics for Si8442Bx variants, and enables use in high-speed gate drive and real-time control applications where legacy optocouplers fail.
Does SI8442BA-D-IUR require external components for basic operation?
No, SI8442BA-D-IUR requires only VDD bypass capacitors (0.1 µF ceramic per supply rail) for stable operation - no external resistors, level shifters, or initialization firmware. Its RF-based architecture eliminates start-up delays, and the device begins passing data within 40 µs of power application, as specified in the "Start-up Time" parameter (tSU = 15–40 µs).
How does the enable (EN) pin function on SI8442BA-D-IUR?
The EN pin on SI8442BA-D-IUR is an active-high control input located on the output side. When EN = low, all four outputs enter high-impedance (Hi-Z) state - critical for safe power sequencing in isolated systems. When EN = high or floating (NC), outputs follow input states with guaranteed timing. This behavior is documented in Table 12 ("Si84xx Logic Operation Table") of the datasheet.
What safety certifications apply to SI8442BA-D-IUR?
SI8442BA-D-IUR is certified to UL 1577 (1000 VRMS, 1 min), VDE IEC 60747-5-2 (560 Vpeak working voltage), and CSA Component Notice 5A. These certifications cover the QSOP-16 package and are production-tested to 1200 VRMS for 1 second, as stated in Table 6 and Note * on page 12 of the datasheet Rev. 1.2.
Can SI8442BA-D-IUR operate with different supply voltages on input and output sides?
Yes, SI8442BA-D-IUR supports independent VDD1 (input side) and VDD2 (output side) supplies ranging from 2.70 V to 5.5 V each. This allows interfacing a 3.3 V microcontroller (VDD1) with a 5 V gate driver IC (VDD2) without external level translation - a capability confirmed in Tables 1 and 3 of the datasheet under Recommended Operating Conditions and Electrical Characteristics.
SI8442BA-D-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 150Mbps
- 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
SI8442BA-D-IUR FAQ
1.How can I place an order for SI8442BA-D-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8442BA-D-IUR 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 SI8442BA-D-IUR reliable?
The price and inventory of SI8442BA-D-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442BA-D-IUR is usually 5 days.
3.What payment methods are accepted for SI8442BA-D-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442BA-D-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8442BA-D-IUR?
SI8442BA-D-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8442BA-D-IUR 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 SI8442BA-D-IUR?
For technical support, including SI8442BA-D-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442BA-D-IUR requirements.
6.How does Aetrix verify that SI8442BA-D-IUR is sourced from the original manufacturer or authorized distributors?
All SI8442BA-D-IUR 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 SI8442BA-D-IUR meets industry standards.
7.What is the process for return or replacement of SI8442BA-D-IUR?
All SI8442BA-D-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8442BA-D-IUR, 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 SI8442BA-D-IUR part is unused and in its original packaging.
Return procedure for SI8442BA-D-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8442BA-D-IUR 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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