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Skyworks Solutions Inc. SI8450BA-A-IS1R
- Part No.:
- SI8450BA-A-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8450BA-A-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,415
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Product details
Overview
SI8450BA-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, 25 kV/µs CMTI, and 2.5 kVRMS reinforced isolation-designed for isolated ADC interfaces in industrial motor drives.
For engineers reviewing the SI8450BA-A-IS1R datasheet, SI8450BA-A-IS1R pinout, SI8450BA-A-IS1R application, or SI8450BA-A-IS1R equivalent, key selection criteria include channel count (5), supply voltage range (2.7–5.5 V), isolation rating (2.5 kVRMS), timing precision (<1.5 ns pulse width distortion), and RoHS-compliant narrow SOIC packaging.
Technical Context
The SI8450BA-A-IS1R implements capacitive isolation with on-chip RF modulation/demodulation, enabling high-speed signal transfer across galvanic barriers without magnetic coupling or optoelectronic components. It features independent enable control per side and supports bidirectional data flow across all five channels.
Its architecture delivers stable timing performance over –40°C to +125°C at full 150 Mbps, with channel-to-channel skew ≤1.8 ns and propagation delay skew ≤3.0 ns-critical for synchronized sampling in isolated analog front-ends and real-time control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent unidirectional isolation channels-enables full isolation of multi-signal interfaces like SPI + GPIO or ADC clock/data lines. |
| Max Data Rate | 150 Mbps-supports high-resolution, high-sample-rate isolated ADCs and fast serial communication links. |
| Propagation Delay | 3.0–9.5 ns (typ/max)-ensures sub-10 ns latency for time-critical feedback paths in servo and inverter control. |
| Isolation Voltage | 2.5 kVRMS (UL/CSA/VDE certified)-meets reinforced insulation requirements for 300 VRMS working voltage in industrial mains-connected systems. |
| Supply Voltage | 2.7–5.5 V on both sides-allows interoperability with 3.3 V microcontrollers and 5 V legacy logic without level shifters. |
| CMTI | 25 kV/µs-prevents data corruption during fast transients in motor drive switching nodes and power supply noise environments. |
| Power @ 100 Mbps | 4.6–24 mA per side (5 V) / 4.4–16.8 mA per side (3.3 V)-enables low-power operation in battery-backed or thermally constrained modules. |
Pinout & Package
SI8450BA-A-IS1R is housed in a 16-pin narrow-body SOIC (SOIC-16NB) package with 1.27 mm pitch, 10.3 mm × 7.5 mm footprint, and 2.35 mm max height-compatible with standard automated PCB assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | Primary-side input channels (IN1–IN5) | Digital inputs referenced to VDD1; accept 2.0–5.5 V logic levels with ±10 µA leakage. |
| 6, 7, 8 | Primary-side ground and supply (GND1, VDD1, EN1) | VDD1 powers primary-side logic; EN1 enables/disables all primary outputs (low = tri-state). |
| 9, 10, 11, 12, 13 | Secondary-side output channels (OUT1–OUT5) | CMOS-compatible outputs referenced to VDD2; drive 4 mA sink/source with 85 Ω nominal impedance. |
| 14, 15, 16 | Secondary-side supply and ground (VDD2, GND2, EN2) | VDD2 powers secondary-side logic; EN2 controls secondary outputs (low = tri-state); independent of EN1. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Valid output within 40 µs of power application-eliminates boot-time delays in safety-critical power-on sequences. |
| Precision timing | ≤1.5 ns pulse width distortion and ≤0.5 ns typical channel-channel skew-preserves signal integrity in high-speed synchronous interfaces. |
| Ultra-low-power operation | <1.6 mA per channel at 1 Mbps (5 V), <6 mA per channel at 100 Mbps-reduces thermal load in dense isolation stacks. |
| High EMI immunity | 25 kV/µs common-mode transient immunity-maintains data integrity near IGBT gate drivers and DC-link capacitors. |
| Safety certification | UL 1577 (2500 VRMS), CSA Component Notice 5A, VDE IEC 60747-5-2-enables single-component compliance for reinforced insulation in IEC 61800-5-1 systems. |
Applications
| Industrial Motor Drives | Isolated ADC Interfaces |
|---|---|
|
Use Scenario: Isolating PWM gate signals and current-sense feedback between MCU and three-phase inverter stage. IC Role / Device Role / Timing Role: Five-channel isolator separates control logic (VDD1) from high-voltage power domain (VDD2), transmitting gate enable, fault flags, and analog monitor signals with <10 ns latency. Use Value: Enables safe, high-bandwidth closed-loop control while meeting IEC 61800-5-1 reinforced insulation requirements for 690 VAC drives. |
Use Scenario: Isolating serial interface (SPI) and conversion-ready signals between isolated ADC (e.g., AD7403) and host processor. IC Role / Device Role / Timing Role: Transmits SCLK, MOSI, MISO, CS, and BUSY across isolation barrier with matched propagation delay to preserve sampling timing accuracy. Use Value: Maintains <1.5 ns pulse width distortion to prevent SPI setup/hold violations at 20+ MSPS sample rates. |
| Hybrid Electric Vehicle Battery Management | Isolated Switch-Mode Power Supplies |
|
Use Scenario: Isolating cell voltage monitoring and balancing commands in high-voltage battery packs (up to 800 VDC). IC Role / Device Role / Timing Role: Provides five independent isolation paths for voltage sense lines, temperature sensors, and FET control signals across multiple stacked BMS ICs. Use Value: 2.5 kVRMS rating and 60-year lifetime at rated voltage ensure long-term reliability under continuous high-potential stress. |
Use Scenario: Isolating feedback signals (voltage/current sense) and PWM control from primary to secondary side in LLC resonant converters. IC Role / Device Role / Timing Role: Transfers error amplifier output and overcurrent trip signals across isolation barrier with <9.5 ns delay and 25 kV/µs CMTI. Use Value: Prevents false triggering during fast dV/dt events at transformer primary, improving converter stability and efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D0BRZ | 4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; no enable pins; higher quiescent current (1.8 mA/ch @ 1 Mbps, 5 V) | Lacks independent enable control per side; unsuitable where dynamic output disabling is required for power sequencing. | Select when only four channels are needed and enable functionality is not required-lower BOM cost but reduced flexibility. |
| ISO6751QDWR | 5-channel, 50 Mbps, 5 kVRMS, SOIC-16; lower speed; higher CMTI (100 kV/µs); 1.62–5.5 V supply | Insufficient for >50 Mbps interfaces (e.g., high-speed SPI, LVDS clock distribution); better suited for slower, higher-isolation safety monitoring. | Select when 5 kVRMS isolation is mandatory and data rate ≤50 Mbps-trade speed for enhanced creepage/clearance margin. |
Compared with ADUM141D0BRZ and ISO6751QDWR, SI8450BA-A-IS1R uniquely balances five-channel count, 150 Mbps speed, 2.5 kVRMS rating, and dual-enable control-making it optimal for high-fidelity isolated data acquisition and real-time motor control where timing fidelity and configurability are critical.
Availability
SI8450BA-A-IS1R is available at Aetrix Electronics and suitable for industrial motor drives, isolated ADC interfaces, hybrid electric vehicle battery management, and isolated switch-mode power supplies requiring stable component supply and long-lifecycle support.
Supply support for SI8450BA-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 for high-reliability applications.
The Si84xx family was designed specifically for high-speed, low-power galvanic isolation in industrial automation, automotive electrification, and energy infrastructure-replacing optocouplers with CMOS-based capacitive isolation.
FAQ
What is the maximum operating temperature for SI8450BA-A-IS1R at full 150 Mbps data rate?
The SI8450BA-A-IS1R operates reliably from –40°C to +125°C ambient temperature at 150 Mbps with 15 pF load and 5 V supply. Thermal derating applies above 125°C case temperature per DIN EN 60747-5-2; full specification compliance requires maintaining junction temperature ≤150°C using the specified θJA of 105°C/W.
Does SI8450BA-A-IS1R support bidirectional communication on any channel?
No, SI8450BA-A-IS1R provides five unidirectional channels-IN1–IN5 on the primary side drive OUT1–OUT5 on the secondary side. Bidirectional operation requires external logic or pairing with a complementary isolator; the device does not implement auto-direction sensing or half-duplex arbitration.
What safety certifications apply to SI8450BA-A-IS1R and what working voltages do they support?
SI8450BA-A-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These support up to 300 VRMS reinforced insulation working voltage and 600 VRMS basic insulation working voltage-validated for use in IEC 61800-5-1 and IEC 62109 systems.
How does the enable pin (EN1/EN2) function on SI8450BA-A-IS1R?
EN1 (pin 7) and EN2 (pin 16) independently control output driver states: logic low places corresponding side's outputs (OUT1–OUT5 or IN1–IN5) into high-impedance tri-state mode; logic high enables normal operation. Enable timing adds ≤9.2 ns delay to output disable/enable transitions-critical for power sequencing in multi-rail systems.
Is SI8450BA-A-IS1R pin-compatible with other members of the Si845x family?
Yes, SI8450BA-A-IS1R shares identical pinout and package (SOIC-16NB) with all Si8450/51/52/55 variants. Channel configuration (e.g., Si8451 = 4:1, Si8452 = 3:2) and speed grade (A = 1 Mbps, B = 150 Mbps) differ internally-but mechanical and electrical interface compatibility is maintained across the family for drop-in layout reuse.
SI8450BA-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:
- 5/0
- 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
SI8450BA-A-IS1R FAQ
1.How can I place an order for SI8450BA-A-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8450BA-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 SI8450BA-A-IS1R reliable?
The price and inventory of SI8450BA-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 SI8450BA-A-IS1R is usually 5 days.
3.What payment methods are accepted for SI8450BA-A-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450BA-A-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8450BA-A-IS1R?
SI8450BA-A-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8450BA-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 SI8450BA-A-IS1R?
For technical support, including SI8450BA-A-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450BA-A-IS1R requirements.
6.How does Aetrix verify that SI8450BA-A-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8450BA-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 SI8450BA-A-IS1R meets industry standards.
7.What is the process for return or replacement of SI8450BA-A-IS1R?
All SI8450BA-A-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8450BA-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 SI8450BA-A-IS1R part is unused and in its original packaging.
Return procedure for SI8450BA-A-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8450BA-A-IS1R Tags
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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
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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