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Skyworks Solutions Inc. SI8440AB-C-IS1
- Part No.:
- SI8440AB-C-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8440AB-C-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
SI8440AB-C-IS1 from Skyworks Solutions is a quad-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay <9.5 ns, 2.7–5.5 V dual supply operation, and 2500 VRMS reinforced isolation. It serves as a high-reliability signal barrier in isolated power supplies, motor control gate drivers, and industrial I/O modules.
For engineers reviewing the SI8440AB-C-IS1 datasheet, SI8440AB-C-IS1 pinout, SI8440AB-C-IS1 application, or SI8440AB-C-IS1 equivalent, key selection criteria include its AEC-Q100 qualification, 25 kV/µs CMTI, channel-to-channel skew ≤1.8 ns at 150 Mbps, and compatibility with both 3.3 V and 5 V logic domains across –40 to +125 °C.
Technical Context
The SI8440AB-C-IS1 implements capacitive isolation using differential RF signaling across an on-chip SiO₂ dielectric barrier, enabling robust noise immunity without magnetic coupling or optoelectronic degradation. Its architecture supports independent VDD1/VDD2 supplies per side, allowing level-shifting between 2.7 V and 5.5 V domains while maintaining timing integrity.
All four channels are unidirectional with enable control (EN1–EN4), supporting low-power shutdown modes and precise timing synchronization. The device achieves <1.5 ns pulse width distortion and <6 ns minimum pulse width at 150 Mbps, meeting stringent requirements for isolated gate drive and high-speed serial interface bridging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed SPI, RS-485, and PWM feedback links in real-time control systems |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures sub-10 ns latency for closed-loop motor control and isolated ADC sampling |
| Channel-Channel Skew | ≤1.8 ns (max) - maintains phase alignment across multiple isolated signals in multi-phase inverters |
| CMTI | ≥25 kV/µs - rejects fast transients in high-noise environments like variable-frequency drives and EV battery management |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA 5A, and VDE 0884-2 |
| Supply Range | 2.7–5.5 V per side - supports interoperability with legacy 3.3 V microcontrollers and modern 5 V analog front-ends |
| Power @ 100 Mbps | 3.6–24.3 mA per side (5 V) - enables energy-efficient operation in thermally constrained industrial gate driver designs |
Pinout & Package
SI8440AB-C-IS1 is housed in a 16-pin wide-body SOIC package (7.5 mm body width, 10.3 mm length) with creepage/clearance ≥8.0 mm, rated for reinforced insulation per IEC 60747-5-2 and UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Input Channels A–D (IN1–IN4) | Digital input pins accepting CMOS/TTL logic levels; each independently controlled by corresponding ENx |
| 5, 6, 7, 8 | Enable Inputs EN1–EN4 | Active-high enables for respective channels; outputs go high-impedance when disabled |
| 9, 10, 11, 12 | Output Channels A–D (OUT1–OUT4) | CMOS-compatible buffered outputs referenced to VDD2; support 4 mA sink/source drive |
| 13, 14 | VDD1, GND1 | Primary-side power and ground for inputs and enables (2.7–5.5 V) |
| 15, 16 | VDD2, GND2 | Secondary-side power and ground for outputs (2.7–5.5 V, galvanically isolated from VDD1) |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Valid output data within 40 µs of power-on - eliminates boot-time uncertainty in safety-critical systems |
| Precision timing | 1.5 ns typical pulse width distortion and 0.5 ns typical channel-channel skew - preserves signal integrity in high-resolution encoder interfaces |
| Ultra-low power at speed | <6 mA per channel at 100 Mbps (5 V) - reduces thermal load in densely packed isolated DC-DC controllers |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - validated for automotive subsystems including onboard chargers and traction inverters |
| RoHS-compliant wide-body SOIC | 7.5 mm creepage meets IEC 60664-1 Category II/III mains voltage requirements - simplifies PCB layout for industrial AC-DC converters |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating PWM gate drive signals between MCU and IGBT/MOSFET half-bridges in servo drives. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator providing independent, low-skew, high-CMTI signal paths for upper/lower gate drivers and fault feedback. Use Value: Enables 150 Mbps PWM update rates with ≤1.8 ns inter-channel skew, reducing dead-time uncertainty and improving inverter efficiency. |
Use Scenario: Isolating feedback signals (voltage/current sense) from secondary-side to primary-side controller in LLC resonant converters. IC Role / Device Role / Timing Role: High-speed digital isolator transmitting error amplifier output or ADC codes across isolation barrier with minimal latency. Use Value: Sub-10 ns propagation delay and 25 kV/µs CMTI ensure stable regulation under fast load transients and EMI-rich conditions. |
| Hybrid Electric Vehicle Onboard Charger | Isolated Data Acquisition System |
Use Scenario: Isolating CAN communication lines and auxiliary control signals between high-voltage battery domain and low-voltage vehicle network. IC Role / Device Role / Timing Role: Quad-channel isolator handling bidirectional CAN TX/RX pairs plus two status/control lines with reinforced 2500 VRMS barrier. Use Value: AEC-Q100 Grade 1 rating and 125 °C ambient operation guarantee reliability in under-hood charger enclosures. |
Use Scenario: Isolating serial interface (SPI/I²C) between isolated ADC/DAC and host processor in high-precision test equipment. IC Role / Device Role / Timing Role: Low-jitter, low-skew digital isolator preserving timing accuracy of sampled data streams and configuration commands. Use Value: 1.5 ns pulse width distortion and 6 ns minimum pulse width support 20+ MSps sampling clock distribution without duty-cycle degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 2500 VRMS isolation, 25 Mbps max data rate, 20 ns max propagation delay, SOIC-16 narrow body (4.01 mm creepage) | Limited to lower-speed industrial I/O and sensor interfaces; not rated for AEC-Q100 or >125 °C operation | Preferred where cost sensitivity outweighs speed and temperature requirements; requires tighter layout due to reduced creepage |
| ISO6741QDWR | 5000 VRMS isolation, 50 Mbps max data rate, 16 ns max propagation delay, SOIC-16 wide body (8.0 mm creepage), AEC-Q100 Grade 1 | Higher isolation rating suits medical or grid-tied inverters; lower speed limits use in high-bandwidth motor control | Select when enhanced isolation margin is critical and 150 Mbps is unnecessary; same wide-body footprint eases migration |
Compared with ADUM2402BRWZ and ISO6741QDWR, SI8440AB-C-IS1 uniquely balances 150 Mbps speed, AEC-Q100 qualification, and 2500 VRMS isolation in a wide-body SOIC-making it optimal for next-generation EV power electronics and high-performance industrial drives where timing precision and thermal resilience are non-negotiable.
Availability
SI8440AB-C-IS1 is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and hybrid electric vehicle onboard chargers requiring stable component supply and long-term lifecycle support.
Supply support for SI8440AB-C-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 for wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for high-reliability, high-speed digital isolation in harsh environments-targeting applications demanding AEC-Q100 qualification, extended temperature operation, and reinforced insulation compliance.
FAQ
What is the maximum operating temperature for SI8440AB-C-IS1?
The SI8440AB-C-IS1 is rated for continuous operation from –40 °C to +125 °C at full 150 Mbps data rate, verified per AEC-Q100 Grade 1 requirements. This specification applies across the full 2.7–5.5 V supply range and includes derating validation for thermal stability in enclosed power electronics enclosures.
Does SI8440AB-C-IS1 support bidirectional communication?
No, SI8440AB-C-IS1 provides four unidirectional channels only. Each channel (IN1→OUT1, IN2→OUT2, etc.) operates strictly from primary to secondary side. For bidirectional isolation, discrete pairing or alternative devices such as SI8442AB-C-IS1 (dual-channel, bidirectional) must be used.
What safety certifications apply to SI8440AB-C-IS1?
SI8440AB-C-IS1 is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2), all covering reinforced insulation. Certification documentation is maintained under Skyworks file numbers E257455 (UL), 232873 (CSA), and 5006301-4880-0001 (VDE).
How does the enable function operate on SI8440AB-C-IS1?
Each channel has a dedicated active-high enable pin (EN1–EN4). When an ENx pin is low, its corresponding output (OUTx) enters high-impedance state. Enable-to-data-valid delay is ≤8.0 ns, and enable-to-tri-state delay is ≤9.2 ns, ensuring deterministic control during power sequencing or fault recovery.
Is SI8440AB-C-IS1 pin-compatible with other Si84xx variants?
Yes, SI8440AB-C-IS1 shares identical pinout and package with all Si8440/41/42/45 family members in the 16-pin wide-body SOIC format. However, functional differences exist: SI8440 is quad unidirectional, SI8441 is triple unidirectional + one bidirectional, and SI8442 is dual bidirectional - requiring firmware and schematic verification before substitution.
SI8440AB-C-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 25ns
- 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-SOIC
SI8440AB-C-IS1 FAQ
1.How can I place an order for SI8440AB-C-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8440AB-C-IS1 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 SI8440AB-C-IS1 reliable?
The price and inventory of SI8440AB-C-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8440AB-C-IS1 is usually 5 days.
3.What payment methods are accepted for SI8440AB-C-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440AB-C-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8440AB-C-IS1?
SI8440AB-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8440AB-C-IS1 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 SI8440AB-C-IS1?
For technical support, including SI8440AB-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440AB-C-IS1 requirements.
6.How does Aetrix verify that SI8440AB-C-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8440AB-C-IS1 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 SI8440AB-C-IS1 meets industry standards.
7.What is the process for return or replacement of SI8440AB-C-IS1?
All SI8440AB-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8440AB-C-IS1, 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 SI8440AB-C-IS1 part is unused and in its original packaging.
Return procedure for SI8440AB-C-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8440AB-C-IS1 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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