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Skyworks Solutions Inc. SI8440AB-D-IS1
- Part No.:
- SI8440AB-D-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8440AB-D-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,786
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Product details
Overview
SI8440AB-D-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 and delivers ultra-low power consumption - as low as 3.6 mA per side at 1 Mbps (5 V), enabling use in isolated motor control gate drivers and industrial PLC I/O modules.
For engineers reviewing the SI8440AB-D-IS1 datasheet, SI8440AB-D-IS1 pinout, SI8440AB-D-IS1 application, or SI8440AB-D-IS1 equivalent, key selection criteria include its AEC-Q100 qualification, 25 kV/µs common-mode transient immunity (CMTI), SOIC-16 wide-body package with 8.0 mm creepage/clearance, and guaranteed timing performance down to –40 °C at full speed.
Technical Context
The SI8440AB-D-IS1 implements capacitive isolation with differential RF signaling across four independent channels, enabling bidirectional or unidirectional signal transfer without start-up initialization. Its architecture supports dual supply domains (VDD1/VDD2), each configurable from 2.70 V to 5.5 V, and includes an enable input for output tri-state control with 5–8 ns enable-to-data timing.
It achieves precise timing via matched channel propagation paths: typical channel-to-channel skew is 0.5 ns, pulse width distortion is ≤1.5 ns, and minimum pulse width is 6.0 ns - all specified over –40 to +125 °C at 150 Mbps. Safety compliance includes UL 1577 (2500 VRMS), CSA Component Notice 5A, and VDE IEC 60747-5-2 (560 VPEAK working voltage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed serial interfaces like isolated SPI, RS-485 transceiver control, and real-time encoder feedback links. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables tight timing budgets in closed-loop motor control and fast ADC/DAC sampling synchronization. |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements for industrial mains-connected systems and EV battery management. |
| Supply Range | 2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V legacy logic without level shifters. |
| CMTI | ≥25 kV/µs - ensures robust operation in noisy environments such as inverters, switch-mode power supplies, and motor drives. |
| Operating Temp | –40 to +125 °C - validated for automotive under-hood and industrial ambient conditions at full 150 Mbps data rate. |
| Power @ 1 Mbps | <3.6 mA per side (5 V) - reduces thermal load and extends battery life in portable isolated sensor nodes. |
Pinout & Package
SI8440AB-D-IS1 is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm creepage and clearance, optimized for reinforced insulation in high-voltage applications. Pin assignments follow standard Si8440 family layout with independent input/output pairs per channel and dedicated enable control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power for inputs and channel 1–2 drivers; must be decoupled with ≥100 nF capacitor near pin. |
| GND1 | Primary-side ground | Reference for VDD1 domain; separate from secondary-side ground to maintain isolation barrier. |
| EN | Enable input | Active-high control: asserts outputs when high; places outputs in high-impedance state when low (ten2 ≤ 9.2 ns). |
| IN1–IN4 | Input signals | Unidirectional logic inputs referenced to GND1; accept 2.0 V min VIH and 0.8 V max VIL. |
| VDD2 | Secondary-side supply | Power for outputs and channel 3–4 receivers; supports independent voltage scaling vs. VDD1. |
| GND2 | Secondary-side ground | Reference for VDD2 domain; galvanically isolated from GND1 by internal capacitive barrier. |
| OUT1–OUT4 | Output signals | CMOS-compatible outputs referenced to GND2; drive 4 mA sink/source with VOH ≥ VDD2–0.4 V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel isolation | Four independent signal paths in single WB-SOIC-16 package - reduces PCB area vs. discrete optocouplers or dual isolators. |
| No start-up initialization | Valid output within 40 µs of power application (tSU) - eliminates boot-time delays in safety-critical systems. |
| Precision timing | 0.5 ns typical channel-to-channel skew and 1.5 ns pulse width distortion - preserves signal integrity in multi-channel synchronous interfaces. |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - enables use in automotive powertrain and charging infrastructure without derating. |
| RoHS-compliant packaging | Lead-free wide-body SOIC with halogen-free molding compound - meets global environmental compliance requirements. |
Applications
| Industrial PLC I/O Modules | Isolated Switch-Mode Power Supplies |
|---|---|
Use Scenario: Digital input/output expansion in programmable logic controllers handling 24 V DC field signals. IC Role / Device Role / Timing Role: Isolates microcontroller GPIOs from high-noise factory floor wiring while maintaining <10 ns timing accuracy for deterministic scan cycles. Use Value: Enables direct connection to 24 V sensors/actuators without external level shifters or optocoupler timing drift. | Use Scenario: Feedback signal isolation in 1–3 kW AC/DC converters using PWM controllers like UC384x or UCC28C4x. IC Role / Device Role / Timing Role: Transfers error amplifier output and current-sense pulses across isolation barrier with 25 kV/µs CMTI immunity. Use Value: Prevents noise-induced false triggering in high-dV/dt flyback or LLC topologies operating at >100 kHz. |
| Motor Control Gate Drivers | Isolated Data Acquisition Systems |
Use Scenario: Level-shifting and isolating PWM signals to half-bridge IGBT/MOSFET gate drivers in servo inverters. IC Role / Device Role / Timing Role: Delivers matched propagation delay (<9.5 ns) and low skew (≤0.5 ns) to ensure precise dead-time control between high/low-side switches. Use Value: Eliminates shoot-through risk in 10–20 kHz motor drive switching while reducing gate driver BOM count. | Use Scenario: Isolating analog front-end ADCs (e.g., ADS131E08) and DACs in high-resolution energy metering or test equipment. IC Role / Device Role / Timing Role: Transfers conversion ready strobes, serial clock, and data bits across isolation barrier with 150 Mbps capability. Use Value: Supports simultaneous sampling of 8+ channels at >1 MSPS without timing jitter degradation from ground loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402ARWZ | 4-channel, 25 kV/µs CMTI, 2500 VRMS, SOIC-16 wide body; lower max data rate (25 Mbps) and higher propagation delay (45 ns max). | Suitable for cost-sensitive industrial I/O where 150 Mbps is unnecessary; lacks AEC-Q100 qualification. | Select when timing budget allows >40 ns delay and automotive qualification is not required. |
| ISO6741QDWR | 4-channel, 50 kV/µs CMTI, 5000 VRMS, SOIC-16 wide body; supports 50 Mbps, wider supply range (1.71–5.5 V), but no 150 Mbps mode. | Better suited for ultra-noisy HV battery monitoring in EVs; higher isolation rating trades off speed. | Choose for enhanced noise immunity in >1000 V systems where 150 Mbps is excessive. |
Compared with ADUM2402ARWZ and ISO6741QDWR, SI8440AB-D-IS1 uniquely balances 150 Mbps speed, sub-10 ns timing, AEC-Q100 qualification, and 2500 VRMS isolation in a single wide-body SOIC - making it optimal for high-performance motor drives and automotive-grade power converters requiring both speed and reliability.
Availability
SI8440AB-D-IS1 is available at Aetrix Electronics and suitable for industrial automation systems, hybrid electric vehicle power stages, and isolated switch-mode supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8440AB-D-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 for wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for high-reliability galvanic isolation in harsh electromagnetic environments - targeting applications demanding precision timing, low power, and regulatory-certified safety barriers.
FAQ
What is the maximum data rate supported by SI8440AB-D-IS1?
The SI8440AB-D-IS1 supports a maximum data rate of 150 Mbps under recommended operating conditions (VDD = 5 V, TA = –40 to +125 °C). This is confirmed in Table 3 timing characteristics for Si844xBx variants, which include SI8440AB-D-IS1. Performance remains stable across the full temperature range without derating.
Does SI8440AB-D-IS1 require external components for basic operation?
No, SI8440AB-D-IS1 requires only VDD bypass capacitors (≥100 nF ceramic) on each supply rail. The device contains integrated regulators and does not need external resistors, level shifters, or startup circuitry - simplifying design and reducing BOM count compared to optocoupler-based isolation.
Is SI8440AB-D-IS1 qualified for automotive applications?
Yes, SI8440AB-D-IS1 is AEC-Q100 qualified (Grade 1, –40 to +125 °C) and rated for operation at full 150 Mbps across that temperature range. It is approved for use in automotive powertrain and charging systems where reinforced isolation and high CMTI are critical.
What safety certifications apply to SI8440AB-D-IS1?
SI8440AB-D-IS1 is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK). These cover reinforced insulation for industrial and automotive applications, with production-tested isolation up to 3000 VRMS for 1 second.
How does the enable pin function on SI8440AB-D-IS1?
The EN pin on SI8440AB-D-IS1 is an active-high enable input. When high, outputs reflect input states with ≤9.5 ns propagation delay; when low, outputs enter high-impedance state within 9.2 ns (ten2). This allows dynamic channel disabling without affecting isolation integrity or supply domains.
SI8440AB-D-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-D-IS1 FAQ
1.How can I place an order for SI8440AB-D-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8440AB-D-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-D-IS1 reliable?
The price and inventory of SI8440AB-D-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-D-IS1 is usually 5 days.
3.What payment methods are accepted for SI8440AB-D-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440AB-D-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8440AB-D-IS1?
SI8440AB-D-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8440AB-D-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-D-IS1?
For technical support, including SI8440AB-D-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440AB-D-IS1 requirements.
6.How does Aetrix verify that SI8440AB-D-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8440AB-D-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-D-IS1 meets industry standards.
7.What is the process for return or replacement of SI8440AB-D-IS1?
All SI8440AB-D-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8440AB-D-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-D-IS1 part is unused and in its original packaging.
Return procedure for SI8440AB-D-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8440AB-D-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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