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Skyworks Solutions Inc. SI8445BB-C-ISR
- Part No.:
- SI8445BB-C-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8445BB-C-ISR.pdf
- Description:
- IC DIGITAL ISOLATOR SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
SI8445BB-C-ISR from Silicon Labs is a quad-channel, ultra-low-power digital isolator with reinforced isolation up to 2500 VRMS, supporting data rates up to 150 Mbps, worst-case propagation delay <9.5 ns, and operation from 2.70–5.5 V across –40 to +125 °C. It serves as a high-speed signal barrier in isolated power supplies and motor control interfaces.
For engineers reviewing the SI8445BB-C-ISR datasheet, SI8445BB-C-ISR pinout, SI8445BB-C-ISR application, or SI8445BB-C-ISR equivalent, key selection criteria include its 150 Mbps capability, 0.5 ns typical channel-to-channel skew, 25 kV/µs CMTI, SOIC-16 wide-body package, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The SI8445BB-C-ISR implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic timing without external clocks. Each of its four independent channels operates bidirectionally with matched input/output logic thresholds (VIH = 2.0 V, VIL = 0.8 V) and rail-to-rail CMOS-compatible outputs.
It features integrated enable control per side (EN1/EN2), supports dual supply domains (VDD1/VDD2), and maintains stable timing performance over full temperature and voltage ranges. Its 85 Ω nominal output impedance enables controlled-impedance PCB routing for high-speed signal integrity at 150 Mbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated ADC/DAC clocking. |
| Propagation Delay | 3.0–9.5 ns - enables sub-10 ns timing-critical feedback loops in isolated gate drivers and power converters. |
| Channel-Channel Skew | 0.5 ns typical - ensures precise synchronization across all four isolated signals in multi-phase motor control. |
| Common-Mode Transient Immunity | 25 kV/µs - sustains reliable operation in noisy industrial environments with fast-switching IGBTs or SiC FETs. |
| Supply Voltage Range | 2.70–5.5 V - allows direct interfacing with 3.3 V microcontrollers and 5 V legacy systems without level-shifting. |
| Isolation Withstand Voltage | 2500 VRMS - certified for reinforced insulation per UL 1577, VDE 0884-2, and CSA Component Notice 5A. |
| Power Consumption @ 100 Mbps | 3.8–24.3 mA per side - ultra-low active current enables thermally constrained designs in sealed enclosures. |
Pinout & Package
SI8445BB-C-ISR is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm creepage/clearance, optimized for reinforced insulation compliance and high-voltage spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Primary-side inputs (IN1–IN4) | Digital input signals referenced to VDD1; accept 2.0 V min VIH and 0.8 V max VIL. |
| 5, 6, 7, 8 | Primary-side outputs (OUT1–OUT4) | CMOS outputs driven from VDD1; VOH ≥ VDD1–0.4 V, VOL ≤ 0.4 V at 4 mA sink. |
| 9, 10, 11, 12 | Secondary-side outputs (OUT5–OUT8) | Isolated CMOS outputs referenced to VDD2; identical drive strength and logic thresholds as primary side. |
| 13, 14, 15, 16 | Secondary-side inputs (IN5–IN8) | Isolated digital inputs referenced to VDD2; support bidirectional signal flow across isolation barrier. |
| 10, 11 | Enable pins (EN1, EN2) | Active-high enables for primary (EN1) and secondary (EN2) sides; tri-states outputs when low. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; delivers stable timing over 60-year lifetime at rated voltage. |
| 0.5 ns typical channel-to-channel skew | Enables synchronized sampling across multiple isolated ADC channels in energy metering and power quality analyzers. |
| 25 kV/µs common-mode transient immunity | Prevents data corruption during fast dV/dt events in motor drives and inverters with SiC/GaN switches. |
| AEC-Q100 qualified | Validated for automotive applications including battery management systems and onboard chargers. |
| SOIC-16 wide-body package | Provides 8.0 mm creepage/clearance for reinforced insulation compliance in industrial safety-critical systems. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating PWM gate-drive signals and feedback from current/voltage sensors in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator providing synchronous, low-skew signal transfer between MCU and isolated gate drivers. Use Value: 0.5 ns channel skew and 9.5 ns max propagation delay ensure precise phase alignment and minimize dead-time uncertainty. |
Use Scenario: Isolating feedback signals (voltage, current, temperature) from secondary side to primary-side controller in AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: High-CMTI digital isolator transmitting error amplifier output and fault flags across isolation barrier. Use Value: 25 kV/µs CMTI prevents false triggering during transformer ringing and MOSFET switching transients. |
| Automotive Battery Management | Isolated Data Acquisition |
|
Use Scenario: Transmitting cell voltage and temperature measurements from high-voltage battery stack to MCU in EV traction batteries. IC Role / Device Role / Timing Role: AEC-Q100-qualified quad isolator delivering isolated digital sensor data with reinforced 2500 VRMS barrier. Use Value: 150 Mbps capability supports fast polling of multi-cell monitoring ICs while maintaining functional safety integrity. |
Use Scenario: Isolating SPI bus between host processor and isolated ADCs in high-precision energy meters and grid monitors. IC Role / Device Role / Timing Role: Low-jitter, low-skew isolator preserving timing integrity of sampled waveform data across isolation boundary. Use Value: 1.5 ns pulse width distortion and 2 ns propagation delay skew preserve signal fidelity for 16-bit+ resolution sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | 4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16 wide-body; higher typical supply current (e.g., 12.5 mA @ 100 Mbps, 5 V). | Same isolation rating and speed, but lacks AEC-Q100 qualification and has higher power consumption. | Preferred where automotive qualification is not required and board-level thermal margin is available. |
| ISO6741QDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16 wide-body; lower speed but higher isolation rating and integrated LDO. | Supports higher working voltages (up to 800 VRMS) but insufficient for 100+ Mbps SPI or fast feedback loops. | Selected when system-level isolation requirements exceed 2500 VRMS and data rate ≤50 Mbps suffices. |
Compared with ADUM140D0BRWZ and ISO6741QDWR, SI8445BB-C-ISR delivers superior power efficiency at 150 Mbps and automotive-grade reliability, making it optimal for thermally constrained, high-speed motor control and BMS designs requiring long-term stability.
Availability
SI8445BB-C-ISR is available at Aetrix Electronics and suitable for industrial motor control, isolated power supplies, and automotive battery management systems requiring stable component supply and long-lifecycle support.
Supply support for SI8445BB-C-ISR 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
Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and wireless technologies for industrial, automotive, and IoT applications.
The Si84xx family was designed to replace optocouplers with robust, high-speed, low-power digital isolation for safety-critical power conversion and control systems.
FAQ
What is the maximum operating temperature for SI8445BB-C-ISR?
The SI8445BB-C-ISR is rated for continuous operation from –40 °C to +125 °C at 150 Mbps with 15 pF load and 2.70–5.5 V supply. This full-range specification applies to both wide-body SOIC packages and is validated per AEC-Q100 Grade 1 requirements.
Does SI8445BB-C-ISR require external components for basic operation?
No. SI8445BB-C-ISR requires only VDD bypass capacitors (0.1 µF ceramic per supply pin) for stable operation. No external resistors, pull-ups, or initialization sequences are needed-enabling immediate data transmission after power-up within 40 µs start-up time.
How does the enable function work on SI8445BB-C-ISR?
SI8445BB-C-ISR has two independent enable pins: EN1 (pin 10) controls primary-side outputs (pins 5–8), and EN2 (pin 11) controls secondary-side outputs (pins 9–12). When asserted high, outputs follow input states; when low, outputs enter high-impedance state within 9.2 ns.
Is SI8445BB-C-ISR pin-compatible with other Si844x variants?
Yes-SI8445BB-C-ISR shares identical pinout and package (WB-SOIC-16) with all Si8440/41/42/45 family members. However, channel configuration differs: SI8445BB-C-ISR provides four bidirectional channels, whereas SI8440Bx offers unidirectional 4/0 split and SI8441Bx offers 3/1 split.
What safety certifications apply to SI8445BB-C-ISR?
SI8445BB-C-ISR is certified to UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2), supporting reinforced insulation up to 560 Vpeak working voltage and 600 VRMS in industrial and automotive applications.
SI8445BB-C-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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
SI8445BB-C-ISR FAQ
1.How can I place an order for SI8445BB-C-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8445BB-C-ISR 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 SI8445BB-C-ISR reliable?
The price and inventory of SI8445BB-C-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8445BB-C-ISR is usually 5 days.
3.What payment methods are accepted for SI8445BB-C-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8445BB-C-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8445BB-C-ISR?
SI8445BB-C-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8445BB-C-ISR 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 SI8445BB-C-ISR?
For technical support, including SI8445BB-C-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8445BB-C-ISR requirements.
6.How does Aetrix verify that SI8445BB-C-ISR is sourced from the original manufacturer or authorized distributors?
All SI8445BB-C-ISR 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 SI8445BB-C-ISR meets industry standards.
7.What is the process for return or replacement of SI8445BB-C-ISR?
All SI8445BB-C-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8445BB-C-ISR, 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 SI8445BB-C-ISR part is unused and in its original packaging.
Return procedure for SI8445BB-C-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8445BB-C-ISR 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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