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Skyworks Solutions Inc. SI8440BA-C-IS1
- Part No.:
- SI8440BA-C-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8440BA-C-IS1.pdf
- Description:
- DGTL ISO 1000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,253
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Product details
Overview
SI8440BA-C-IS1 from Skyworks Solutions is a quad-channel digital isolator with reinforced 2500 VRMS isolation, supporting up to 150 Mbps data rate and worst-case propagation delay under 9.5 ns. It operates across 2.70–5.5 V supply rails on both sides, delivers ultra-low power consumption (e.g., <3.8 mA per channel at 100 Mbps/5 V), and is qualified for industrial (-40°C to +125°C) and automotive-grade applications including isolated motor control and power inverters.
For engineers reviewing the SI8440BA-C-IS1 datasheet, SI8440BA-C-IS1 pinout, SI8440BA-C-IS1 application, or SI8440BA-C-IS1 equivalent, this page provides verified timing specs, SOIC-16 wide-body package details, safety certifications (UL, CSA, VDE), and design-critical parameters including CMTI ≥25 kV/µs, channel-to-channel skew ≤1.8 ns, and enable-controlled tri-state operation.
Technical Context
The SI8440BA-C-IS1 implements capacitive isolation with on-chip RF modulation/demodulation, enabling high-speed signal transfer without magnetic coupling or optoelectronic degradation. Its dual-die architecture separates input and output domains, supporting independent 2.70–5.5 V supplies on each side with no start-up initialization required.
It features an active enable input (ENx) that places outputs in high-impedance state when asserted low, with defined timing windows: enable-to-data-valid ≤8.0 ns and enable-to-tri-state ≤9.2 ns. All four channels are unidirectional, with precise timing performance maintained across temperature and voltage extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500 VRMS (1 min), reinforced insulation per UL 1577, CSA 5A, and VDE IEC 60747-5-2 |
| Data Rate | Up to 150 Mbps - supports high-bandwidth serial interfaces like SPI, RS-485, and isolated ADC/DAC links |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical feedback loops in motor control and SMPS |
| Channel-Channel Skew | ≤1.8 ns (max) - ensures synchronized sampling across multiple isolated sensor or actuator channels |
| Common-Mode Transient Immunity | ≥25 kV/µs - maintains signal integrity in noisy environments such as inverters and industrial drives |
| Supply Voltage Range | 2.70–5.5 V on both VDD1 and VDD2 - allows interoperability with 3.3 V and 5 V logic systems |
| Power Consumption | <3.8 mA per channel at 100 Mbps / 5 V - reduces thermal load and extends battery life in portable isolated systems |
Pinout & Package
SI8440BA-C-IS1 is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with creepage/clearance of 8.0 mm, rated for 2500 VRMS reinforced insulation. Pin numbering follows standard SOIC convention (pin 1 = top-left corner, notch indicator).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power for input-side logic and isolation transmitter; accepts 2.70–5.5 V |
| GND1 | Primary-side ground | Reference for input signals and VDD1; must be separated from GND2 by isolation barrier |
| IN1–IN4 | Unidirectional input channels | Digital inputs referenced to GND1; compatible with CMOS/LVTTL logic levels |
| EN1–EN4 | Per-channel enable inputs | Active-low enables; assertion forces corresponding OUTx into high-impedance state |
| VDD2 | Secondary-side supply | Power for output-side logic and isolation receiver; independent 2.70–5.5 V domain |
| GND2 | Secondary-side ground | Reference for output signals and VDD2; galvanically isolated from GND1 |
| OUT1–OUT4 | Unidirectional output channels | CMOS-compatible outputs referenced to GND2; drive strength supports 15 pF loads |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional isolation | Four independent 2500 VRMS-isolated signal paths in one SOIC-16 package, reducing BOM count and PCB area |
| Ultra-low power at high speed | <3.8 mA per channel at 100 Mbps / 5 V - enables energy-efficient isolation in thermally constrained designs |
| Precision timing performance | Worst-case channel-to-channel skew ≤1.8 ns and pulse width distortion ≤2.5 ns - critical for time-synchronized control systems |
| Robust noise immunity | CMTI ≥25 kV/µs - prevents false triggering in high-dv/dt environments like IGBT gate drivers and motor phase sensing |
| AEC-Q100 qualification | Qualified to Grade 1 (–40°C to +125°C) - suitable for automotive subsystems requiring long-term reliability under stress |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback between MCU and three-phase inverter stage. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting gate-enable commands and receiving isolated analog-to-digital converter outputs. Use Value: Enables precise, skew-controlled timing across all three phases while maintaining 2500 VRMS working voltage separation between primary and secondary grounds. |
Use Scenario: Providing feedback isolation for voltage and current regulation in offline AC/DC converters with >1 kV DC bus. IC Role / Device Role / Timing Role: Transmitting error amplifier output and auxiliary supply status across isolation barrier with minimal propagation delay. Use Value: Supports fast-loop response with ≤9.5 ns max propagation delay and ≥25 kV/µs CMTI, preventing instability during transient load steps. |
| Hybrid Electric Vehicle Battery Management | Isolated Data Acquisition Systems |
Use Scenario: Isolating cell voltage monitoring and balancing signals between high-voltage battery stack and low-voltage controller. IC Role / Device Role / Timing Role: Four independent channels carrying differential ADC readings and balance switch controls across 2500 VRMS barrier. Use Value: AEC-Q100 Grade 1 qualification and 60-year lifetime at rated voltage ensure long-term reliability in automotive battery packs. |
Use Scenario: Interfacing isolated precision ADCs and DACs in test equipment requiring noise-free analog front-ends. IC Role / Device Role / Timing Role: Transmitting synchronized sample clocks and conversion results while rejecting ground loop interference. Use Value: Channel-to-channel skew ≤1.8 ns and input-output capacitance of only 2.0 pF minimize timing jitter and crosstalk in multi-channel acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | Quad-channel, 150 Mbps, 2500 VRMS, but uses iCoupler magnetic isolation; higher typical power (≈5.2 mA/ch @ 100 Mbps) | Less suited for ultra-low-power battery-operated systems; same SOIC-16 WB footprint | Prefer ADUM140D0BRWZ if magnetic isolation compatibility with legacy Analog Devices designs is required. |
| ISO6741QDWR | Quad-channel, 50 Mbps max, 5000 VRMS reinforced, TI's capacitive isolator; wider supply range (1.71–5.5 V) | Limited to lower-speed interfaces; better suited for high-isolation-voltage safety-critical systems over speed | Choose ISO6741QDWR where 5000 VRMS certification and extended low-voltage operation down to 1.71 V are mandatory. |
Compared with ADUM140D0BRWZ and ISO6741QDWR, the SI8440BA-C-IS1 delivers superior speed-power tradeoff (150 Mbps at <3.8 mA/ch) and tighter timing (≤1.8 ns skew), making it optimal for high-performance industrial and automotive real-time control where both bandwidth and synchronization matter.
Availability
SI8440BA-C-IS1 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, long-lifecycle support, and certified 2500 VRMS isolation.
Supply support for SI8440BA-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.
The Si84xx family was designed specifically for high-reliability, high-speed digital isolation in harsh environments-targeting industrial automation, automotive electrification, and energy infrastructure applications demanding AEC-Q100 qualification and reinforced safety certification.
FAQ
What is the maximum operating temperature for SI8440BA-C-IS1?
The SI8440BA-C-IS1 is rated for continuous operation from –40°C to +125°C ambient temperature at full 150 Mbps data rate and 15 pF load. This specification is validated per AEC-Q100 Grade 1 requirements and applies to both 3.3 V and 5 V supply conditions, ensuring robustness in under-hood automotive and industrial enclosure environments.
Does SI8440BA-C-IS1 support bidirectional communication?
No, SI8440BA-C-IS1 provides four unidirectional isolation channels only (IN1→OUT1 through IN4→OUT4). Each channel is strictly input-to-output; reverse signal flow is not supported. For bidirectional isolation, designers must use separate dedicated channels or select alternative parts like SI8442BA-C-IS1 (dual bidirectional + dual unidirectional configuration).
What safety certifications apply to SI8440BA-C-IS1?
SI8440BA-C-IS1 carries UL 1577 recognition (2500 VRMS), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 certification. These cover reinforced insulation with working voltage ratings up to 600 VRMS (CSA) and 560 Vpeak (VDE), verified via production testing at 3000 VRMS for 1 second.
How does the enable function operate on SI8440BA-C-IS1?
Each of the four ENx pins on SI8440BA-C-IS1 is active-low: pulling ENx low places the corresponding OUTx pin in high-impedance state within ≤9.2 ns. When ENx is high, normal signal transmission resumes after ≤8.0 ns. This enables dynamic channel gating in multi-sensor systems without external multiplexers.
Is SI8440BA-C-IS1 pin-compatible with other Si84xx variants?
Yes, SI8440BA-C-IS1 shares identical pinout and package (WB-SOIC-16) with all Si8440/41/42/45 family members. However, functional differences exist: SI8440 is quad unidirectional, SI8441 is triple unidirectional + single bidirectional, and SI8442 is dual bidirectional + dual unidirectional. Electrical behavior and timing specs also vary by variant.
SI8440BA-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:
- 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-SOIC
SI8440BA-C-IS1 FAQ
1.How can I place an order for SI8440BA-C-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8440BA-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 SI8440BA-C-IS1 reliable?
The price and inventory of SI8440BA-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 SI8440BA-C-IS1 is usually 5 days.
3.What payment methods are accepted for SI8440BA-C-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440BA-C-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8440BA-C-IS1?
SI8440BA-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8440BA-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 SI8440BA-C-IS1?
For technical support, including SI8440BA-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440BA-C-IS1 requirements.
6.How does Aetrix verify that SI8440BA-C-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8440BA-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 SI8440BA-C-IS1 meets industry standards.
7.What is the process for return or replacement of SI8440BA-C-IS1?
All SI8440BA-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8440BA-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 SI8440BA-C-IS1 part is unused and in its original packaging.
Return procedure for SI8440BA-C-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8440BA-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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