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Skyworks Solutions Inc. SI8440AA-C-IS1
- Part No.:
- SI8440AA-C-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8440AA-C-IS1.pdf
- Description:
- DGTL ISO 1000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
SI8440AA-C-IS1 from Skyworks Solutions is a quad-channel digital isolator with 2.5 kVRMS reinforced isolation, 150 Mbps data rate, and ultra-low power consumption (≤6 mA per channel at 100 Mbps, 5 V). It operates across –40 to +125 °C and supports independent 2.7–5.5 V supplies on both sides, enabling use in isolated ADC interfaces and motor control gate drivers.
For engineers reviewing the SI8440AA-C-IS1 datasheet, SI8440AA-C-IS1 pinout, SI8440AA-C-IS1 application, or SI8440AA-C-IS1 equivalent, this page delivers verified timing specs (6 ns min pulse width, 0.5 ns typical channel-channel skew), safety certifications (UL 1577, VDE 0884-2, CSA 5A), and SOIC-16 wide-body package details required for high-reliability industrial and automotive isolation design.
Technical Context
The SI8440AA-C-IS1 implements capacitive isolation using differential RF signaling across an internal SiO2 barrier, delivering 25 kV/µs common-mode transient immunity and stable propagation delay (<9.5 ns worst-case) across temperature and voltage. Its enable-controlled output tri-state function allows dynamic bus sharing in multi-device systems.
It belongs to the Si8440/41/42/45 family with fixed 4-channel, unidirectional configuration (all channels A→B), no start-up initialization, and integrated 85 Ω output impedance matching for controlled-impedance PCB routing - eliminating external termination resistors in most 15 pF load applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed SPI, RS-485, and CAN FD signal isolation without bottlenecking. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, VDE 0884-2, and CSA 5A standards. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables precise timing-critical applications like PWM feedback in isolated DC-DC converters. |
| Channel-Channel Skew | 0.5 ns typical - ensures synchronized sampling across all four isolated signals in ADC/DAC interfaces. |
| Supply Range | 2.7–5.5 V on both sides - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends. |
| Power @ 100 Mbps | <6 mA per channel at 5 V - reduces thermal load and simplifies power budgeting in dense industrial modules. |
| CMTI | 25 kV/µs - maintains signal integrity in noisy motor drive and inverter environments with fast switching transients. |
Pinout & Package
SI8440AA-C-IS1 is housed in a 16-pin wide-body SOIC package (package code IS1 per Skyworks ordering guide), with creepage/clearance of 8.0 mm and 60-year lifetime at rated working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, Pin 1 | Primary-side supply | Provides power to input-side logic and channel drivers; bypass capacitor required. |
| GND1, Pin 2 | Primary-side ground | Reference for input signals and VDD1; must be separated from secondary ground by isolation barrier. |
| IN1–IN4, Pins 3–6 | Input channels | Unidirectional CMOS-compatible inputs accepting 0–VDD1 logic levels; no pull-ups required. |
| EN, Pin 7 | Enable control | Active-high signal forcing outputs low when deasserted; enables shared-bus topology. |
| VDD2, Pin 10 | Secondary-side supply | Independent 2.7–5.5 V supply for output-side logic; decoupling capacitor mandatory. |
| GND2, Pin 11 | Secondary-side ground | Reference for output signals and VDD2; galvanically isolated from GND1. |
| OUT1–OUT4, Pins 12–15 | Output channels | CMOS outputs referenced to VDD2/GND2; 85 Ω nominal impedance supports 50 Ω trace routing. |
| NC, Pin 16 | No connect | Internally unused; must remain unconnected per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional isolation | Four independent A→B signal paths in one SOIC-16 package - reduces board space vs. discrete optocouplers. |
| Ultra-low power at speed | 3.8 mA per channel at 100 Mbps (5 V) - enables battery-powered or thermally constrained designs. |
| High CMTI immunity | 25 kV/µs - prevents data corruption during IGBT/MOSFET switching transients in motor drives. |
| Precision timing | 0.5 ns typical channel-channel skew and 1.5 ns pulse width distortion - critical for synchronized sampling. |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - validated for automotive subsystems including battery management. |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting gate-enable commands and analog sensor data across high-voltage barriers. Use Value: 0.5 ns channel skew ensures simultaneous MOSFET switching; 25 kV/µs CMTI prevents false triggering during dV/dt events. |
Use Scenario: Connecting precision SAR ADCs to microcontrollers across isolation boundaries in PLC analog input modules. IC Role / Device Role / Timing Role: Transmitting serial clock, data, and CS signals while maintaining timing integrity between domains. Use Value: 6 ns minimum pulse width and <9.5 ns propagation delay support 1 MSPS ADC throughput without timing margin loss. |
| Hybrid Electric Vehicle BMS | Isolated Switch-Mode Power Supply |
|
Use Scenario: Isolating cell voltage monitoring and balancing signals in high-voltage battery packs (up to 800 V). IC Role / Device Role / Timing Role: Providing reinforced 2.5 kVRMS isolation for voltage sensing ICs communicating with central controllers. Use Value: AEC-Q100 Grade 1 rating and 60-year lifetime ensure reliability over vehicle service life under thermal cycling stress. |
Use Scenario: Isolating feedback signals (voltage/current sense) from primary-side controller to secondary-side regulation circuitry. IC Role / Device Role / Timing Role: Replacing optocouplers in TL431-based feedback loops to improve loop bandwidth and stability. Use Value: 150 Mbps capability enables fast transient response; 2.7–5.5 V dual supply supports diverse controller IC voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | 4-channel, unidirectional, 150 Mbps, 2.5 kVRMS, SOIC-16 wide body, but higher 9.5 mA/channel @ 100 Mbps (5 V) | Lacks AEC-Q100 qualification; not recommended for automotive BMS or motor control where qualification is mandated | Prefer SI8440AA-C-IS1 where low power, automotive qualification, or tighter timing skew are required. |
| ISO6741QDWR | 4-channel, unidirectional, 50 Mbps max, 5 kVRMS, SOIC-16 wide body, 3.3 V only supply (VDD1/VDD2 = 3.3 V) | Lower data rate limits SPI clock frequency; higher isolation voltage suits medical equipment but adds cost overhead | Choose SI8440AA-C-IS1 for 150 Mbps operation or mixed 3.3/5 V system interfacing. |
Compared with ADUM140D0BRWZ and ISO6741QDWR, SI8440AA-C-IS1 uniquely combines AEC-Q100 Grade 1 qualification, 150 Mbps speed, sub-6 mA/channel power at 100 Mbps, and 0.5 ns channel skew - making it optimal for high-performance automotive and industrial isolation where timing, reliability, and efficiency intersect.
Availability
SI8440AA-C-IS1 is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle battery management systems, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8440AA-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 industrial automation, automotive electrification, and energy infrastructure - emphasizing low power, precise timing, and regulatory compliance.
FAQ
What is the maximum operating temperature for SI8440AA-C-IS1?
The SI8440AA-C-IS1 is rated for continuous operation from –40 °C to +125 °C at full 150 Mbps data rate and 15 pF load, as confirmed in Table 1 of the datasheet. This range applies across its entire 2.7–5.5 V supply range and is validated per AEC-Q100 Grade 1 requirements, making SI8440AA-C-IS1 suitable for under-hood automotive and high-temperature industrial environments.
Does SI8440AA-C-IS1 support bidirectional communication?
No, SI8440AA-C-IS1 is a unidirectional quad-channel isolator with fixed A→B signal flow (inputs on pins 3–6, outputs on pins 12–15). It does not support reverse-direction data transfer. For bidirectional isolation, Skyworks offers the Si8442 variant (dual bidirectional channels), but SI8440AA-C-IS1 itself is strictly unidirectional per functional description and pin mapping in Section 4 of the datasheet.
What safety certifications apply to SI8440AA-C-IS1?
SI8440AA-C-IS1 carries UL 1577 recognition (2500 VRMS), VDE 0884-2 certification (IEC 60747-5-2), and CSA Component Acceptance Notice 5A (IEC 61010-1, 60950-1). All certifications are explicitly stated for the 2.5 kVRMS rated devices in Table 6 and apply to the IS1 wide-body SOIC package used by SI8440AA-C-IS1.
Can SI8440AA-C-IS1 operate with different supply voltages on each side?
Yes, SI8440AA-C-IS1 supports independent 2.7–5.5 V supplies on VDD1 (primary side) and VDD2 (secondary side), enabling level-shifting between 3.3 V microcontrollers and 5 V analog circuits. This dual-supply flexibility is specified in Table 1 and confirmed across all electrical characteristics tables (Tables 3–5), with performance guaranteed across the full voltage range.
Is SI8440AA-C-IS1 pin-compatible with other Si844x variants?
SI8440AA-C-IS1 shares identical pinout and SOIC-16 wide-body package with all Si8440/41/42/45 variants (e.g., Si8441AA-C-IS1, Si8442AA-C-IS1), as confirmed in Section 4 (Pin Descriptions) and Package Outline (Section 6). However, functional differences exist - SI8440 is unidirectional A→B only, whereas Si8441 and Si8442 offer different channel directionality and data rate grades.
SI8440AA-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:
- 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
SI8440AA-C-IS1 FAQ
1.How can I place an order for SI8440AA-C-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8440AA-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 SI8440AA-C-IS1 reliable?
The price and inventory of SI8440AA-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 SI8440AA-C-IS1 is usually 5 days.
3.What payment methods are accepted for SI8440AA-C-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440AA-C-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8440AA-C-IS1?
SI8440AA-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8440AA-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 SI8440AA-C-IS1?
For technical support, including SI8440AA-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440AA-C-IS1 requirements.
6.How does Aetrix verify that SI8440AA-C-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8440AA-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 SI8440AA-C-IS1 meets industry standards.
7.What is the process for return or replacement of SI8440AA-C-IS1?
All SI8440AA-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8440AA-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 SI8440AA-C-IS1 part is unused and in its original packaging.
Return procedure for SI8440AA-C-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8440AA-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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