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Skyworks Solutions Inc. SI8650EC-AS1R
- Part No.:
- SI8650EC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8650EC-AS1R.pdf
- Description:
- AUTOMOTIVE 3.75 KV 5-CHANNEL DIG
- Quantity:
- Payment:
- Shipping:
Inventory:1,879
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Product details
Overview
SI8650EC-AS1R from Skyworks is a five-channel, unidirectional digital isolator with 3.75 kVRMS reinforced isolation, 150 Mbps data rate, and selectable high-fail-safe output mode. It features Schmitt-trigger inputs, tri-state outputs with enable control, and operates across –40 to +125 °C for industrial and automotive isolated communication interfaces.
For engineers reviewing the SI8650EC-AS1R datasheet, SI8650EC-AS1R pinout, SI8650EC-AS1R application, or SI8650EC-AS1R equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all confirmed against Skyworks' official Si8650/51/52/55 datasheet (Rev. 206455A, Jan 2023).
Technical Context
The SI8650EC-AS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent VDD1/VDD2 supplies (2.5–5.5 V), undervoltage lockout per side, and fail-safe logic retention during input-side power loss.
All five channels are input-only on Side A (VDD1) and output-only on Side B (VDD2), with EN2 controlling all five outputs in high-impedance state. The device uses internal 2 µA pull-ups on EN pins and exhibits <13 ns max propagation delay, <4.5 ns pulse width distortion, and 50 kV/µs common-mode transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, A-to-B only (0 inputs on VDD2 side) |
| Max Data Rate | 150 Mbps - supports high-speed serial links (e.g., SPI, RS-485, CAN FD physical layer isolation) |
| Isolation Rating | 3.75 kVRMS - certified per UL 1577, VDE 0884-10, CSA 5A, CQC GB4943.1 for reinforced insulation |
| Fail-Safe Default | High - outputs drive high when VDD1 is unpowered and VDD2 is active (ordering-defined behavior) |
| Propagation Delay | 5–13 ns - enables sub-10 ns timing-critical isolation in motor gate drivers and ADC sampling clocks |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V and 5 V logic domains without level shifters |
| Power @ 100 Mbps | 4.1–28.7 mA total (VDD1+VDD2) - ultra-low power vs. optocouplers, critical for thermally constrained systems |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package, RoHS-compliant, 260 °C peak reflow, creepage/clearance optimized for 3.75 kVRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channel inputs and internal transmitter; must be ≥2.5 V for valid operation |
| GND1 | Input-side ground | Reference for all Side A signals; requires dedicated low-impedance return path |
| IN1–IN5 | Digital inputs | CMOS/Schmitt-trigger inputs accepting 0–VDD1; no external pull-up/down needed |
| VDD2 | Output-side supply | Power for output drivers and receiver; independent of VDD1, enabling level shifting |
| GND2 | Output-side ground | Isolated reference for Side B; must be physically separated from GND1 per safety standards |
| OUT1–OUT5 | Digital outputs | 50 Ω nominal output impedance; compatible with 50 Ω PCB traces for >50 Mbps signaling |
| EN2 | Output enable | Active-high control for all five outputs; drives OUT1–OUT5 into high-Z when low |
| NC | No connect | Pin 16 is internally unconnected; may be left floating, tied to VDD2, or grounded |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; guarantees 60-year life at rated working voltage |
| Tri-state outputs with EN2 | Enables bus sharing and hot-swap capability without external logic or contention risk |
| Schmitt-trigger inputs | 440 mV typical hysteresis ensures reliable operation in noisy industrial environments (e.g., motor drives) |
| Fail-safe high default | Prevents undefined states during brown-out; critical for safety-critical outputs (e.g., fault shutdown signals) |
| 50 kV/µs CMTI | Withstands fast transients in high-dv/dt systems like inverters and SMPS without data corruption |
Applications
| Industrial Motor Control | Isolated Power Supply Monitoring |
|---|---|
|
Use Scenario: Gate driver signal isolation in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: Transmits PWM enable/disable and fault feedback across isolation barrier with <13 ns delay skew. Use Value: Enables precise timing alignment between phase legs and prevents shoot-through due to propagation mismatch. |
Use Scenario: Monitoring output voltage/current sense signals in isolated DC-DC converters. IC Role / Device Role / Timing Role: Isolates analog-to-digital converter (ADC) digital interface while maintaining 150 Mbps throughput. Use Value: Supports real-time telemetry without compromising isolation integrity or adding latency to protection loops. |
| Battery Management Systems | Medical Isolated Data Acquisition |
|
Use Scenario: Cell voltage monitoring and pack-level communication in EV battery packs. IC Role / Device Role / Timing Role: Isolates SPI daisy-chain between BMS controller and cell monitor ICs across 3.75 kVRMS barrier. Use Value: Meets IEC 62368-1 reinforced insulation requirements while enabling high-resolution SOC estimation. |
Use Scenario: Isolating ECG/EEG front-end ADC digital outputs in patient-connected equipment. IC Role / Device Role / Timing Role: Provides 5-channel isolation for multi-lead acquisition with fail-safe high default for alarm signaling. Use Value: Complies with IEC 60601-1 creepage/clearance and leakage current limits for Type BF applied parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8650EC-B-IS1 | Industrial-grade (–I suffix), same 3.75 kVRMS, NB SOIC-16, high-fail-safe, but not AEC-Q100 qualified | Lacks automotive PPAP documentation and IMDS/CAMDS support; suitable for non-automotive industrial use | Select when automotive qualification is unnecessary and cost sensitivity outweighs traceability requirements |
| ADUM140E0BRZ | Analog Devices quad-channel isolator; 3.75 kVRMS, 150 Mbps, but only 4 channels and no EN pin for full-output disable | Requires two devices for 5-channel coverage; lacks integrated fail-safe high default configuration | Choose only if existing design uses ADI ecosystem and channel count can be accommodated via duplication |
Compared with SI8650EC-AS1R, SI8650EC-B-IS1 offers identical electrical and isolation specs but omits automotive process controls and documentation, while ADUM140E0BRZ provides comparable speed and rating but falls short on channel count, fail-safe configurability, and output-enable flexibility - making SI8650EC-AS1R optimal for space-constrained, safety-certified 5-channel isolation.
Availability
SI8650EC-AS1R is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, isolated power supply monitoring, and medical data acquisition requiring stable component supply across extended temperature and safety certification lifecycles.
Supply support for SI8650EC-AS1R 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 Si865x family was designed specifically for high-reliability, low-power digital isolation in harsh environments - targeting industrial automation, automotive electrification, and medical systems where legacy optocouplers fail on lifetime, speed, or power.
FAQ
What is the isolation rating and safety certification status of SI8650EC-AS1R?
SI8650EC-AS1R provides 3.75 kVRMS reinforced isolation and is certified to UL 1577, VDE 0884-10, CSA Component Notice 5A, and CQC GB4943.1. These approvals validate its suitability for end-equipment meeting IEC 62368-1 and IEC 60601-1 safety requirements. SI8650EC-AS1R achieves this in a narrow-body SOIC-16 package with guaranteed 60-year lifetime at rated working voltage.
Does SI8650EC-AS1R support bidirectional communication?
No, SI8650EC-AS1R is strictly unidirectional: all five channels transmit from Side A (VDD1) to Side B (VDD2). It has zero inputs on the VDD2 side - meaning no reverse-path signals. For bidirectional isolation, designers must pair SI8650EC-AS1R with a complementary device such as SI8651EC-AS1R (4:1 configuration) or select a different family member explicitly supporting dual-direction channels.
How does the fail-safe high default mode function in SI8650EC-AS1R?
In SI8650EC-AS1R, the "EC" ordering code specifies high-fail-safe behavior: when VDD1 is unpowered (0 V) and VDD2 remains active, all five outputs (OUT1–OUT5) drive logic high. This is implemented via internal pull-ups and is guaranteed across –40 to +125 °C. It ensures defined safe states during input-side brownouts - critical for fault signaling in motor drives and BMS applications.
What is the role of the EN2 pin on SI8650EC-AS1R?
EN2 is the single enable input for all five outputs on SI8650EC-AS1R. When EN2 is high, outputs follow their respective inputs; when EN2 is low, all five outputs enter high-impedance state. This allows centralized bus control, hot-swap capability, and power sequencing without external logic. EN2 is internally pulled up to VDD2 with a 2 µA current source, so it may be left floating if permanently enabled.
Can SI8650EC-AS1R operate with mixed supply voltages, e.g., 3.3 V on VDD1 and 5 V on VDD2?
Yes, SI8650EC-AS1R supports independent VDD1 and VDD2 supplies from 2.5 V to 5.5 V each. It is fully specified for 3.3 V/5 V, 5 V/3.3 V, and other combinations - enabling seamless level translation between logic domains. Input thresholds (VT+ = 1.67 V typ, VT– = 1.23 V typ) ensure compatibility across both rails without external biasing.
SI8650EC-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 5
- Inputs - Side 1/Side 2:
- 5/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8650EC-AS1R FAQ
1.How can I place an order for SI8650EC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8650EC-AS1R 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 SI8650EC-AS1R reliable?
The price and inventory of SI8650EC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8650EC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8650EC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8650EC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8650EC-AS1R?
SI8650EC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8650EC-AS1R 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 SI8650EC-AS1R?
For technical support, including SI8650EC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8650EC-AS1R requirements.
6.How does Aetrix verify that SI8650EC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8650EC-AS1R 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 SI8650EC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8650EC-AS1R?
All SI8650EC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8650EC-AS1R, 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 SI8650EC-AS1R part is unused and in its original packaging.
Return procedure for SI8650EC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8650EC-AS1R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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