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Skyworks Solutions Inc. SI8450AB-A-IS1
- Part No.:
- SI8450AB-A-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8450AB-A-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,924
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Product details
Overview
SI8450AB-A-IS1 from Skyworks Solutions is a five-channel, ultra-low-power digital isolator in a 16-pin narrow-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay <9.5 ns, 2.7–5.5 V dual supply operation, and 2500 VRMS reinforced isolation for industrial and automotive signal integrity applications.
For engineers reviewing the SI8450AB-A-IS1 datasheet, SI8450AB-A-IS1 pinout, SI8450AB-A-IS1 application, or SI8450AB-A-IS1 equivalent, this device delivers precise timing (0.5 ns channel-channel skew), high CMTI (25 kV/µs), and low power consumption (<4.6 mA per channel at 100 Mbps on 5 V), making it suitable for isolated ADC interfaces, motor control gate drivers, and hybrid EV battery management systems.
Technical Context
The SI8450AB-A-IS1 implements capacitive isolation with CMOS-based signal transmission across an internal dielectric barrier, enabling DC-to-150 Mbps operation without start-up initialization. Its dual-supply architecture (VDD1/VDD2) supports independent 2.7–5.5 V domains on each side, with integrated ESD protection and no external components beyond VDD bypass capacitors.
It features active enable control with 5–8 ns enable-to-data-valid timing, 6 ns minimum pulse width support, and guaranteed timing stability over –40 to +125 °C at full speed. Safety certification includes UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK working voltage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed serial communication in isolated SPI, RS-485, and CAN FD interfaces. |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns timing accuracy critical for real-time motor control and power converter feedback loops. |
| Channel-Channel Skew | 0.5–1.8 ns - maintains phase alignment across all five channels for synchronized sampling in isolated ADC/DAC systems. |
| Supply Voltage Range | 2.7–5.5 V per side - supports interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Isolation Rating | 2500 VRMS (1 min) - meets reinforced insulation requirements for industrial PLCs and EV traction inverters per IEC 61800-5-1. |
| CMTI | 25 kV/µs - rejects fast common-mode transients in noisy motor drive and SMPS environments without signal corruption. |
| Power Consumption | <4.6 mA per channel at 100 Mbps (5 V) - reduces thermal load and extends battery life in portable isolated sensors and BMS modules. |
Pinout & Package
SI8450AB-A-IS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC package (7.5 mm width, 10.3 mm length) with creepage/clearance of 4.01 mm / 4.9 mm and 2.0 pF input-output capacitance for minimal signal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power supply | Supplies logic and transmitter circuitry on input side; requires local 0.1 µF bypass capacitor. |
| GND1 | Primary-side ground reference | Return path for VDD1; must be separated from secondary-side ground to maintain isolation barrier. |
| IN1–IN5 | Digital input signals (side 1) | Accept CMOS/TTL-compatible logic levels; VIH ≥2.0 V, VIL ≤0.8 V across full temperature range. |
| EN | Enable control input | Active-high; outputs go high-impedance when low; 5–8 ns enable-to-data-valid delay ensures clean state transitions. |
| VDD2 | Secondary-side power supply | Supplies receiver and output driver circuitry; independently regulated from VDD1. |
| GND2 | Secondary-side ground reference | Return path for VDD2; galvanically isolated from GND1 to sustain 2500 VRMS withstand voltage. |
| OUT1–OUT5 | Isolated digital outputs (side 2) | CMOS-compatible outputs with VOH ≥ VDD2–0.4 V and VOL ≤0.4 V; 85 Ω nominal output impedance for controlled-impedance routing. |
Key Features
| Feature | Design Value |
|---|---|
| Five-channel bidirectional isolation | Enables full-duplex isolated communication paths (e.g., SPI clock/MOSI/MISO/CS + fault signal) in single-package footprint. |
| Ultra-low power at high speed | Consumes only 4.6 mA per channel at 100 Mbps on 5 V - cuts power by >50% versus legacy optocouplers at same data rate. |
| Precision timing performance | 0.5 ns typical channel-channel skew and 1.5 ns pulse width distortion preserve signal integrity in time-critical feedback loops. |
| Robust transient immunity | 25 kV/µs CMTI rating prevents false triggering during IGBT switching events in 600 V+ power stages. |
| Safety-certified reinforced insulation | UL, CSA, and VDE approvals validate 2500 VRMS isolation for use in medical, industrial, and automotive safety-critical subsystems. |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
Use Scenario: Gate driving and current sensing in three-phase inverter stacks for HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Isolates PWM control signals from MCU to IGBT/SiC gate drivers while synchronizing isolated current-sense ADC sampling. Use Value: 0.5 ns channel skew ensures simultaneous sampling across all three phases, reducing torque ripple and improving FOC accuracy. |
Use Scenario: High-resolution current/voltage measurement in solar string inverters with floating DC-link references. IC Role / Device Role / Timing Role: Transfers serial data from isolated sigma-delta modulators to host processor across 1000 V potential difference. Use Value: 150 Mbps capability supports oversampled 24-bit ADC data streams without bottlenecking system throughput. |
| Hybrid Electric Vehicle BMS | Isolated Switch-Mode Power Supply |
Use Scenario: Cell voltage monitoring and pack-level communication in 400–800 V battery packs with distributed slave controllers. IC Role / Device Role / Timing Role: Provides isolated UART or SPI links between master MCU and daisy-chained cell monitor ICs. Use Value: 2.7–5.5 V dual supply allows direct interface to both 3.3 V MCU and 5 V analog sensor rails without level translation. |
Use Scenario: Feedback loop isolation in 1–3 kW AC/DC PSUs for telecom and server power supplies. IC Role / Device Role / Timing Role: Transfers error amplifier output or PWM duty cycle information from secondary-side controller to primary-side PWM IC. Use Value: 25 kV/µs CMTI prevents mis-triggering during fast MOSFET turn-off, improving regulation stability under dynamic load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D0BRZ | Four-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; lacks enable pin and has higher 7.5 ns max propagation delay. | Not suitable for five-signal isolation; requires external enable logic if needed for power sequencing. | Choose when four channels suffice and enable functionality is unnecessary. |
| ISO6751QDWR | Five-channel, 50 Mbps, 5 kVRMS, SOIC-16; lower speed but higher isolation rating and AEC-Q100 Grade 1 qualification. | Better suited for automotive body electronics requiring 5 kVRMS; insufficient for 100+ Mbps motor control loops. | Prefer for automotive infotainment or ADAS power domains where speed <50 Mbps is acceptable. |
Compared with ADUM141D0BRZ and ISO6751QDWR, SI8450AB-A-IS1 uniquely combines five-channel count, 150 Mbps speed, enable control, and industrial-grade temperature range (–40 to +125 °C), making it optimal for space-constrained, high-performance isolated interfaces where timing precision and channel density are critical.
Availability
SI8450AB-A-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-term lifecycle support, and certified 2500 VRMS isolation performance.
Supply support for SI8450AB-A-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 for wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for high-reliability, low-power digital isolation in harsh electromagnetic environments-targeting applications like industrial automation, EV powertrain systems, and energy infrastructure where timing accuracy and safety certification are non-negotiable.
FAQ
What is the maximum operating temperature for SI8450AB-A-IS1 at full 150 Mbps data rate?
The SI8450AB-A-IS1 operates reliably from –40 to +125 °C at 150 Mbps with 15 pF load and 5 V supply, as validated in Table 1 of the datasheet. Thermal derating begins above 125 °C case temperature per DIN EN 60747-5-2, and power dissipation must remain below 415 mW to maintain safety limiting values.
Does SI8450AB-A-IS1 require external components for basic operation?
No. SI8450AB-A-IS1 requires only 0.1 µF bypass capacitors on VDD1 and VDD2 pins-no pull-up resistors, level shifters, or external termination. Its CMOS architecture eliminates start-up initialization, enabling immediate data transfer after power-on with 15–40 µs start-up time.
How does the enable (EN) pin function in SI8450AB-A-IS1?
The EN pin is active-high and places all five outputs in high-impedance state when low. When enabled, valid data appears at outputs within 5–8 ns (ten1), and tri-state recovery occurs within 7–9.2 ns (ten2). This allows dynamic power gating and bus sharing in multi-master isolated systems.
Is SI8450AB-A-IS1 certified for reinforced insulation in medical applications?
SI8450AB-A-IS1 carries UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2 certifications supporting 2500 VRMS isolation, which satisfies reinforced insulation requirements for BF-rated medical equipment per IEC 60601-1 when used within validated system-level designs and layout constraints.
What is the input-to-output capacitance of SI8450AB-A-IS1 and why does it matter?
SI8450AB-A-IS1 has 2.0 pF input-output capacitance (measured at 1 MHz), a key parameter for noise coupling and EMC performance. Low capacitance minimizes high-frequency common-mode currents across the isolation barrier-critical for meeting CISPR-32 Class B emissions limits in motor drives and power supplies.
SI8450AB-A-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:
- 5
- Inputs - Side 1/Side 2:
- 5/0
- 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
SI8450AB-A-IS1 FAQ
1.How can I place an order for SI8450AB-A-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8450AB-A-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 SI8450AB-A-IS1 reliable?
The price and inventory of SI8450AB-A-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8450AB-A-IS1 is usually 5 days.
3.What payment methods are accepted for SI8450AB-A-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450AB-A-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8450AB-A-IS1?
SI8450AB-A-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8450AB-A-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 SI8450AB-A-IS1?
For technical support, including SI8450AB-A-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450AB-A-IS1 requirements.
6.How does Aetrix verify that SI8450AB-A-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8450AB-A-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 SI8450AB-A-IS1 meets industry standards.
7.What is the process for return or replacement of SI8450AB-A-IS1?
All SI8450AB-A-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8450AB-A-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 SI8450AB-A-IS1 part is unused and in its original packaging.
Return procedure for SI8450AB-A-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8450AB-A-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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