My Inquiry
My Account
Skyworks Solutions Inc. SI88322EC-ASR
- Part No.:
- SI88322EC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88322EC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI88322EC-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W of regulated 3.3 V or 5.0 V output power across 5 kVRMS isolation. It features two forward-directional CMOS isolation channels (A1→B1, A2→B2), 100 Mbps data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C. Used in motor control and industrial PLCs where compact isolated power and signal integrity are critical.
For engineers reviewing the SI88322EC-ASR datasheet, SI88322EC-ASR pinout, SI88322EC-ASR application, or SI88322EC-ASR equivalent, this page delivers verified specifications, SOIC-20 wide-body package details, automotive-grade AEC-Q100 qualification, and real-world design context for isolated gate drivers, battery management systems, and high-voltage inverters.
Technical Context
The SI88322EC-ASR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for noise-immune digital isolation. Its integrated flyback DC-DC controller operates in peak current mode, senses output voltage on the secondary side via VSNS, and transmits error feedback across the barrier without optocouplers.
It supports low-voltage input (3–5.5 V) to 3.3/5.0 V output configurations using internal VSW switches, includes programmable soft-start (SS pin), shutdown (SH_FC pin), and frequency control (SH_FC/SS RC network). Thermal shutdown and cycle-skipping at light loads enhance reliability in continuous-duty applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577, CSA 62368-1, VDE 62368-1 |
| Data Rate | Up to 100 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and PWM feedback loops |
| Propagation Delay | 23 ns max - enables precise timing-critical functions such as gate drive synchronization in motor inverters |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side microcontrollers, ADCs, or isolated gate drivers without external regulators |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| AEC-Q100 Grade | Qualified - ensures robustness for automotive applications including HEV/EV battery monitoring and traction inverter control |
| Transient Immunity | 100 kV/µs typical - maintains signal integrity during fast-switching EMI events in power electronics |
Pinout & Package
SI88322EC-ASR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 7.5 mm, 1.27 mm pitch) with creepage/clearance ≥8.3 mm, certified for reinforced insulation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 15, 16, 17, 18 | GNDP, VSW, VDDP, VDDA, GNDA, SH_FC, SS, NC, NC, NC | Primary-side ground, internal switch output, primary power inputs, signal supply, soft-start/shutdown control - defines low-voltage DC-DC operation and startup behavior |
| 7, 8, 9, 10, 11, 12, 13, 14 | A1, A2, B1, B2, HF XMTR, HF RCVR, HF XMTR, HF RCVR | Two unidirectional digital channels (A→B only); HF XMTR/RCVR pins implement RF carrier modulation/demodulation for isolation |
| 19, 20 | GNDB, VDDB | Secondary-side ground and signal power supply - powers isolated logic and interfaces downstream of isolation barrier |
| VSNS, COMP | Feedback input, compensation node | Enables closed-loop regulation of isolated output voltage; requires external R/C network on COMP for stable flyback control |
Key Features
| Feature | Design Value |
|---|---|
| RF-based digital isolation | Eliminates magnetic field susceptibility and provides best-in-class CMTI (>100 kV/µs) without initialization or clock alignment |
| Integrated flyback DC-DC controller | Supports 3–5.5 V input to 3.3/5.0 V output with internal VSW switch - reduces BOM by eliminating external MOSFET and driver |
| Programmable soft-start | Capacitor on SS pin controls inrush current limiting - prevents transformer saturation and input rail droop during cold start |
| Shutdown and frequency control | SH_FC pin enables converter disable; RC network between SH_FC and SS sets switching frequency from 200–800 kHz - optimizes EMI for layout-constrained designs |
| Secondary-side voltage sensing | VSNS feedback eliminates optocoupler dependency - improves line/load regulation and extends lifetime vs. traditional isolated DC-DC |
Applications
| Motor Control Inverters | Battery Management Systems |
|---|---|
Use Scenario: Isolating gate drive signals and feedback from IGBT/SiC modules in 3-phase inverters for EV traction or industrial drives. IC Role / Device Role / Timing Role: SI88322EC-ASR provides dual-channel isolated PWM transmission and powers isolated gate driver ICs directly from its 5 V output. Use Value: Enables <23 ns channel-to-channel skew for synchronized switching, while integrated DC-DC removes need for separate isolated bias rails. | Use Scenario: Monitoring cell voltages and temperatures in high-voltage EV battery packs with galvanic separation between pack and MCU. IC Role / Device Role / Timing Role: SI88322EC-ASR isolates analog front-end ADC interface and powers isolated ADC reference circuitry via VDDB. Use Value: Delivers 5000 VRMS isolation and AEC-Q100 qualification required for ASIL-B functional safety compliance in battery monitoring units. |
| Industrial PLC I/O Modules | Renewable Energy Inverters |
Use Scenario: Providing isolated digital input conditioning and output driving in modular PLC backplanes exposed to 24 VDC field wiring. IC Role / Device Role / Timing Role: SI88322EC-ASR isolates status signals from sensors and drives solid-state relays with its dual forward channels. Use Value: SOIC-20 wide-body package meets IPC-2221 creepage requirements for 250 V working voltage, reducing PCB area vs. discrete isolator + regulator solutions. | Use Scenario: Isolating MPPT controller communication and powering auxiliary circuits in solar string inverters operating at 1000 VDC bus. IC Role / Device Role / Timing Role: SI88322EC-ASR isolates UART/RS-485 control lines and supplies isolated microcontroller peripherals from its regulated 3.3 V output. Use Value: 125 °C rating supports operation in sealed outdoor enclosures; 100 kV/µs CMTI withstands fast dv/dt transients from SiC switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated DC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6223ARWZ | 2-channel isolator + 500 mW isolated DC-DC; uses iCoupler® capacitive isolation; no programmable frequency or soft-start | Lower output power limits use to low-power sensor interfaces; lacks AEC-Q100 qualification | Choose when board space is constrained and <500 mW isolated power suffices; verify thermal derating at 125 °C |
| ISO7821FDWR | 2-channel isolator only - no integrated DC-DC; requires external isolated power supply; 100 Mbps, 11 ns prop delay | Requires additional isolated DC-DC IC or transformer-based solution; higher component count but better timing precision | Choose when ultra-low propagation delay (<12 ns) and independent power domain control are mandatory |
Compared with ADUM6223ARWZ and ISO7821FDWR, SI88322EC-ASR uniquely combines 2 W isolated power, AEC-Q100 qualification, and programmable soft-start/frequency in a single SOIC-20 package - making it optimal for automotive and industrial systems needing self-contained isolation with robust startup control.
Availability
SI88322EC-ASR is available at Aetrix Electronics and suitable for motor control inverters, battery management systems, and industrial PLC I/O modules requiring stable component supply across automotive and industrial temperature ranges.
Supply support for SI88322EC-ASR 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 Si88x2x family was designed to replace optocoupler-based isolation with integrated, high-reliability digital isolation and efficient isolated DC-DC conversion for automotive, industrial, and energy infrastructure applications.
FAQ
What is the maximum isolated output power of the SI88322EC-ASR?
The SI88322EC-ASR delivers up to 2 W of average isolated output power at 5.0 V. This is achieved using its internal VSW power switch in low-voltage configurations (3–5.5 V input). Peak power capability exceeds 5 W transiently, but sustained operation is rated at 2 W per the datasheet's thermal limits and SOIC-20 package constraints. The SI88322EC-ASR does not require external FETs for this output level.
Does the SI88322EC-ASR support bidirectional data transmission?
No, the SI88322EC-ASR supports only unidirectional data flow: Channel 1 (A1 → B1) and Channel 2 (A2 → B2). It does not include reverse-direction channels. For bidirectional isolation, designers must pair SI88322EC-ASR with a complementary part or select a different variant such as SI88422EC-ASR, which offers two forward and two reverse channels.
How is the switching frequency programmed on the SI88322EC-ASR?
The SI88322EC-ASR switching frequency is set via an external RC network connected between pins SH_FC (Pin 7) and SS (Pin 8). This allows user-adjustable frequency from 200 kHz to 800 kHz. The default frequency is not fixed - it is fully determined by the selected resistor and capacitor values, enabling EMI optimization for specific PCB layouts and noise-sensitive environments.
What isolation certifications apply to the SI88322EC-ASR?
The SI88322EC-ASR is certified to UL 1577 (5000 VRMS, 1 min), CSA 62368-1 (reinforced insulation), VDE 62368-1 (conformity), and CQC GB4943.1. It meets reinforced insulation requirements and has been validated for creepage and clearance ≥8.3 mm in the SOIC-20 wide-body package, supporting end-equipment compliance in industrial and automotive safety standards.
Can the SI88322EC-ASR generate an isolated 24 V output?
No, the SI88322EC-ASR is configured for low-voltage input (3–5.5 V) to 3.3 V or 5.0 V isolated output only. It lacks the external switch driver (ESW) and current sense (RSN) pins required for >5.5 V output configurations. To generate isolated 24 V, use SI88422EC-ASR or SI88622EC-ASR - variants with ESW/RSN support and external FET control capability.
SI88322EC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x2x
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 0/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 40kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 18ns, 23ns
- Pulse Width Distortion (Max):
- 7ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SI88322EC-ASR FAQ
1.How can I place an order for SI88322EC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88322EC-ASR 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 SI88322EC-ASR reliable?
The price and inventory of SI88322EC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88322EC-ASR is usually 5 days.
3.What payment methods are accepted for SI88322EC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88322EC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88322EC-ASR?
SI88322EC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88322EC-ASR 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 SI88322EC-ASR?
For technical support, including SI88322EC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88322EC-ASR requirements.
6.How does Aetrix verify that SI88322EC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88322EC-ASR 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 SI88322EC-ASR meets industry standards.
7.What is the process for return or replacement of SI88322EC-ASR?
All SI88322EC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88322EC-ASR, 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 SI88322EC-ASR part is unused and in its original packaging.
Return procedure for SI88322EC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88322EC-ASR 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
