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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8452BA-A-IS1R

Name: SI8452BA-A-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI8452BA-A-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8452BA-A-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SI8452BA-A-IS1R.pdf

Description:: DGTL ISO 1000VRMS 5CH GP 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI8452BA-A-IS1R 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 <9.5 ns worst-case propagation delay, 2.5 kV_RMS isolation, and operation from 2.70–5.5 V across –40 to +125 °C - deployed in isolated ADC interfaces and motor control gate drivers.

For engineers reviewing the SI8452BA-A-IS1R datasheet, SI8452BA-A-IS1R pinout, SI8452BA-A-IS1R application, or SI8452BA-A-IS1R equivalent, key selection criteria include channel count (5), isolation rating (2500 V_RMS), supply voltage range (2.7–5.5 V), timing precision (<1.8 ns channel-channel skew), and regulatory compliance (UL, CSA, VDE).

Technical Context

The SI8452BA-A-IS1R implements capacitive isolation with on-chip RF modulation/demodulation circuitry, enabling high-speed signal transfer without magnetic or optical coupling. It features independent enable inputs per side and supports bidirectional or unidirectional channel configurations per device variant.

Its architecture delivers stable timing performance across temperature and voltage: propagation delay skew remains ≤3.0 ns (P-P), pulse width distortion ≤2.5 ns, and common-mode transient immunity ≥25 kV/µs - critical for noise-prone industrial power electronics and EV inverter control loops.

Key Specifications

Parameter	Value and Actual Design Meaning
Channels	5 independent isolation channels - enables consolidated isolation of multiple digital signals (e.g., PWM, fault, status) in single-package motor drive or power supply designs.
Max Data Rate	150 Mbps - supports high-resolution encoder feedback, fast SPI communication, and real-time control loop signaling without bottlenecks.
Propagation Delay	3.0–9.5 ns - ensures sub-10 ns latency for time-critical gate driving and protection response in inverters and SMPS.
Isolation Voltage	2500 V_RMS (1 min) - certified for reinforced insulation per UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2.
Supply Range	2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V logic, simplifying level-shifting in mixed-voltage systems.
Power @ 100 Mbps	12.6–15.8 mA per side at 5 V - ultra-low active power enables thermal-constrained designs in sealed enclosures or high-density PCBs.
CMTI	≥25 kV/µs - rejects fast transients from IGBT switching noise, preventing false triggering in industrial motor drives and solar inverters.

Pinout & Package

SI8452BA-A-IS1R is housed in a 16-pin narrow-body SOIC (SOIC-16 NB) package with 1.27 mm pitch, 10.3 mm × 6.4 mm footprint, and 2.35 mm max height - compatible with standard automated assembly and IPC-7351B land patterns.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5	Input channels A1–A5	Primary-side digital inputs accepting CMOS/TTL logic levels; each independently isolated to corresponding output.
6	VDD1	Primary-side supply (2.7–5.5 V); bypass capacitor required between Pin 6 and Pin 8 (GND1).
7	GND1	Primary-side ground reference; must be separated from secondary-side ground by isolation barrier.
8	EN1	Primary-side enable input - pulls all A-side outputs low when asserted low; open-drain compatible.
9, 10, 11, 12, 13	Output channels B1–B5	Secondary-side isolated outputs driving CMOS loads; output impedance ~85 Ω for controlled-impedance trace matching.
14	VDD2	Secondary-side supply (2.7–5.5 V); bypass capacitor required between Pin 14 and Pin 16 (GND2).
15	GND2	Secondary-side ground reference; galvanically isolated from GND1.
16	EN2	Secondary-side enable input - controls B-side outputs; independent of EN1 for asymmetric enable control.

Key Features

Feature	Design Value
Five-channel integration	Reduces component count and board area vs. discrete single-channel isolators - lowers BOM cost and layout complexity in multi-signal isolation applications.
Sub-10 ns propagation delay	Enables tight-tolerance timing in closed-loop motor control and synchronous rectification where phase alignment is critical.
0.5 ns typical channel-channel skew	Preserves signal integrity across parallel data paths (e.g., 3-phase PWM), minimizing timing mismatch-induced torque ripple or EMI.
2.7–5.5 V dual-supply flexibility	Supports mixed-voltage system interfacing - e.g., 3.3 V MCU on primary side and 5 V gate driver on secondary side - without external level shifters.
RoHS-compliant SOIC-16 NB	Meets global environmental compliance requirements and fits legacy SOIC footprints, easing migration from optocouplers or older isolators.

Applications

Industrial Motor Control	Isolated ADC Interface
Use Scenario: Isolating PWM gate signals and fault feedback between MCU and three-phase IGBT/SiC inverter stage. IC Role / Device Role / Timing Role: Five-channel isolator providing independent, low-skew isolation for three PWM outputs, one enable, and one fault signal. Use Value: Enables precise dead-time control and fast overcurrent shutdown response (<10 ns propagation) while maintaining 2500 V_RMS working voltage.	Use Scenario: Transmitting serial data (SPI) and clock from isolated ADC to host processor across high-noise power domains. IC Role / Device Role / Timing Role: Isolating SCLK, MOSI, MISO, CS, and DRDY lines between ADC and controller at up to 150 Mbps. Use Value: Preserves signal integrity at high sampling rates (e.g., >1 MSPS) with <2.5 ns pulse width distortion and 25 kV/µs CMTI.
Hybrid Electric Vehicle Inverter	Isolated Switch-Mode Power Supply
Use Scenario: Isolating high-side gate drive signals and current sense feedback in traction inverter modules operating at 400–800 V DC bus. IC Role / Device Role / Timing Role: Providing reinforced insulation for gate drive and analog monitoring signals in ASIL-B–capable subsystems. Use Value: Certified to UL, CSA, and VDE standards for 2500 V_RMS, supporting functional safety requirements without additional certification overhead.	Use Scenario: Isolating feedback signals (voltage, current, temperature) and control commands between primary-side controller and secondary-side sensing circuitry. IC Role / Device Role / Timing Role: Replacing optocouplers in TL431-based feedback loops and digital PMIC communication links. Use Value: Delivers 10× lower power consumption than optocouplers at 1 Mbps and eliminates LED aging-related drift in long-life power supplies.

Industrial Motor Control

Isolated ADC Interface

Use Scenario: Isolating PWM gate signals and fault feedback between MCU and three-phase IGBT/SiC inverter stage.

IC Role / Device Role / Timing Role: Five-channel isolator providing independent, low-skew isolation for three PWM outputs, one enable, and one fault signal.

Use Value: Enables precise dead-time control and fast overcurrent shutdown response (<10 ns propagation) while maintaining 2500 V_RMS working voltage.

Use Scenario: Transmitting serial data (SPI) and clock from isolated ADC to host processor across high-noise power domains.

IC Role / Device Role / Timing Role: Isolating SCLK, MOSI, MISO, CS, and DRDY lines between ADC and controller at up to 150 Mbps.

Use Value: Preserves signal integrity at high sampling rates (e.g., >1 MSPS) with <2.5 ns pulse width distortion and 25 kV/µs CMTI.

Hybrid Electric Vehicle Inverter

Isolated Switch-Mode Power Supply

Use Scenario: Isolating high-side gate drive signals and current sense feedback in traction inverter modules operating at 400–800 V DC bus.

IC Role / Device Role / Timing Role: Providing reinforced insulation for gate drive and analog monitoring signals in ASIL-B–capable subsystems.

Use Value: Certified to UL, CSA, and VDE standards for 2500 V_RMS, supporting functional safety requirements without additional certification overhead.

Use Scenario: Isolating feedback signals (voltage, current, temperature) and control commands between primary-side controller and secondary-side sensing circuitry.

IC Role / Device Role / Timing Role: Replacing optocouplers in TL431-based feedback loops and digital PMIC communication links.

Use Value: Delivers 10× lower power consumption than optocouplers at 1 Mbps and eliminates LED aging-related drift in long-life power supplies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM141D1BRZ	4-channel, 150 Mbps, 2.5 kV_RMS, SOIC-16; no enable pins; higher typical supply current (14.5 mA @ 100 Mbps, 5 V)	Lacks dedicated enable control per side; unsuitable where asymmetric enable sequencing is required.	Choose ADUM141D1BRZ only if exactly four channels are needed and enable functionality is implemented externally.
ISO6751QDR	5-channel, 50 Mbps, 5000 V_RMS, SOIC-16; wider body; higher propagation delay (25 ns max); supports 1.8–5.5 V	Lower speed limits use in high-bandwidth control loops; higher isolation voltage suits medical or grid-tied applications.	Select ISO6751QDR when 5 kV_RMS isolation is mandatory and data rate ≤50 Mbps suffices - not for 150 Mbps timing-critical paths.

Compared with ADUM141D1BRZ and ISO6751QDR, SI8452BA-A-IS1R uniquely balances five-channel count, 150 Mbps speed, sub-10 ns timing, and integrated dual enable control - making it optimal for compact, high-performance motor and power converter designs requiring precise, low-latency isolation.

Availability

SI8452BA-A-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle inverters, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.

Supply support for SI8452BA-A-IS1R 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, low-power digital isolation in harsh industrial and automotive environments - emphasizing timing precision, regulatory compliance, and thermal robustness over legacy optocoupler alternatives.

FAQ

What is the maximum data rate supported by SI8452BA-A-IS1R?

The SI8452BA-A-IS1R supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40 to +125 °C, CL = 15 pF). This is confirmed in Table 3 of the Skyworks datasheet Rev. 1.6 for Si845xBx variants. The SI8452BA-A-IS1R belongs to the 'Bx' speed grade, distinguishing it from the slower 'Ax' (1 Mbps) versions in the same family.

Does SI8452BA-A-IS1R require external start-up initialization?

No, SI8452BA-A-IS1R does not require external start-up initialization. As stated in the datasheet Features section, "No start-up initialization required." Its internal oscillator and isolation circuitry achieve valid output data within 40 µs of power application (tSU), with no firmware or configuration sequence needed - simplifying system boot design.

What safety certifications apply to SI8452BA-A-IS1R?

SI8452BA-A-IS1R is certified to UL 1577 (2500 V_RMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These approvals cover reinforced insulation and are explicitly listed in Tables 6 and 7 of the datasheet. Certification applies to the 2.5 kV_RMS rated devices, with 100% production testing at 3.0 kV_RMS for 1 second.

Can SI8452BA-A-IS1R operate with different supply voltages on each side?

Yes, SI8452BA-A-IS1R supports independent supply voltages on VDD1 and VDD2, each ranging from 2.70 V to 5.5 V. Electrical Characteristics tables (Tables 3–5) specify performance across 2.7 V, 3.3 V, and 5 V combinations. This enables interfacing between 3.3 V microcontrollers and 5 V gate drivers without level-shifting components.

What is the channel configuration of SI8452BA-A-IS1R?

SI8452BA-A-IS1R provides five unidirectional channels, configured as A1–A5 inputs on the primary side (Pins 1–5) and B1–B5 outputs on the secondary side (Pins 9–13). Pin Descriptions (Section 4 of datasheet) confirm this fixed 5-channel, input-to-output mapping - no channel reconfiguration or bidirectional capability is supported in this variant.

SI8452BA-A-IS1R 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:: Not For New Designs

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 5

Inputs - Side 1/Side 2:: 3/2

Channel Type:: Unidirectional

Voltage - Isolation:: 1000Vrms

Common Mode Transient Immunity (Min):: 25kV/µs (Typ)

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 9.5ns, 9.5ns

Pulse Width Distortion (Max):: 2.5ns

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

SI8452BA-A-IS1R FAQ

1.How can I place an order for SI8452BA-A-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8452BA-A-IS1R 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 SI8452BA-A-IS1R reliable?

The price and inventory of SI8452BA-A-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8452BA-A-IS1R is usually 5 days.

3.What payment methods are accepted for SI8452BA-A-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8452BA-A-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8452BA-A-IS1R?

SI8452BA-A-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8452BA-A-IS1R 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 SI8452BA-A-IS1R?

For technical support, including SI8452BA-A-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8452BA-A-IS1R requirements.

6.How does Aetrix verify that SI8452BA-A-IS1R is sourced from the original manufacturer or authorized distributors?

All SI8452BA-A-IS1R 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 SI8452BA-A-IS1R meets industry standards.

7.What is the process for return or replacement of SI8452BA-A-IS1R?

All SI8452BA-A-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8452BA-A-IS1R, 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 SI8452BA-A-IS1R part is unused and in its original packaging.

Return procedure for SI8452BA-A-IS1R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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