SI8662BB-B-IS1 - 6-Ch 2.5kVrms Digital Isolator | Skyworks
MPN: SI8662BB-B-IS1 ✓ نشطSI8662BB-B-IS1 نظرة عامة
A digital isolator is a semiconductor device that transfers logic signals between two galvanically isolated voltage domains while maintaining a high withstand-voltage isolation barrier (typically 2.5 kVrms to 5 kVrms). Digital isolators belong to the interface IC family within the broader category of isolation components, alongside optocouplers, isolated gate drivers, and isolated ADCs. They are widely used to break ground loops, protect low-voltage logic from high-voltage spikes, and meet safety standards such as IEC 60747-17 and UL 1577 in industrial, automotive, and renewable-energy systems.
Key features include a 150 Mbps maximum signaling rate, 8 ns typical propagation delay, 35 kV/us minimum CMTI, 2.5V to 5.5V wide-side supply range, and a default low or default high output option (the 'B' suffix in this SKU indicates a specific channel-direction configuration). The device operates from -40C to +125C, supports up to 2500Vrms continuous isolation, and integrates refresh, watchdog, and under-voltage lockout functions on each side. The NB SOIC-16 package is a creepage-optimized 300 mil body that satisfies 8 mm reinforced isolation when properly board-mounted.
The Si8662 family uses a differential RF carrier that crosses the GBD-coupled isolation barrier and is recovered on the opposite side by a low-power receiver. This architecture delivers >10x lower dynamic current than legacy optocouplers and supports DC-correct data with deterministic propagation delay across temperature, simplifying timing analysis in SPI, I2C, RS-485, and CAN isolation.
Typical applications include industrial PLC digital I/O isolation, isolated SPI/UART bridges, solar inverter gate-drive signal isolation, motor control feedback isolation, isolated RS-485/CAN transceivers, and medical equipment patient-isolated interfaces. The wide 2.5V-5.5V supply range makes it compatible with 3.3V MCUs, 5V logic, and 1.8V SoCs without level shifters.
When designing with the SI8662BB-B-IS1, place 0.1 uF bypass capacitors as close as possible to both VDD pins (VDD1 and VDD2) and maintain a minimum 4 mm clearance under the device to preserve the 2500Vrms isolation rating. Decouple each supply independently; do not share ground returns across the isolation barrier.
This page synthesizes distributor pricing, drop-in alternative cross-reference data from Skyworks' Si86xx family, and practical PCB-layout design notes for the 16-pin narrow-body SOIC footprint that are not available in the standalone manufacturer datasheet.
بدائل مباشرة لـ SI8662BB-B-IS1 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع SI8662BB-B-IS1 (نفس عامل الشكل والبصمة) — يختلف في Package, Number of Channels, Channel Configuration, MSL Level, Common-Mode Transient Immunity (CMTI).
SI8662BB-B-IS1R
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
SI8662BC-B-IS1
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
SI8662BB-B-IU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←SI8660BB-B-IS1
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←SI8642BB-B-IU
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←SI8641BD-B-ISR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←SI8640BD-B-IS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←SI8662BB-B-IS1 المواصفات
| Isolation Type | Digital Isolator (CMOS, RF-coupled) |
| Number of Channels | 6 |
| Channel Configuration | Bidirectional (per 'B' SKU) |
| Withstand Isolation Voltage | 2500 Vrms |
| Maximum Data Rate | 150 Mbps |
| Propagation Delay (Typical) | 8 ns |
| Common-Mode Transient Immunity (CMTI) | 35 kV/us (minimum) |
| Supply Voltage Range (VDD1, VDD2) | 2.5 V to 5.5 V |
| I/O Voltage Levels | 2.5 V to 5.5 V (CMOS) |
| نطاق درجة حرارة التشغيل | -40 C to +125 C |
| العلبة | NB SOIC-16 (narrow-body SOIC, 0.154 inch / 3.90 mm) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 2 (1 year floor life) |
| حالة RoHS | Compliant |
| UL Recognition | UL 1577 recognized (per datasheet family) |
| Safety Standard | IEC 60747-17 / VDE 0884 (per datasheet family) |
تكوين أطراف SI8662BB-B-IS1
| دبوس 1 | VDD1 — Side-1 power supply (2.5V to 5.5V) |
| دبوس 2 | GND1 — Side-1 ground reference |
| دبوس 3 | A1 — Channel A input or output (per SKU direction map) |
| دبوس 4 | A2 — Channel A input or output (per SKU direction map) |
| دبوس 5 | A3 — Channel A input or output (per SKU direction map) |
| دبوس 6 | A4 — Channel A input or output (per SKU direction map) |
| دبوس 7 | VDD2 — Side-2 power supply (2.5V to 5.5V) |
| دبوس 8 | GND2 — Side-2 ground reference (isolated from GND1) |
| دبوس 9 | B1 — Channel B input or output (per SKU direction map) |
| دبوس 10 | B2 — Channel B input or output (per SKU direction map) |
| دبوس 11 | B3 — Channel B input or output (per SKU direction map) |
| دبوس 12 | B4 — Channel B input or output (per SKU direction map) |
| دبوس 13 | NC — Not connected (per datasheet) |
| دبوس 14 | NC — Not connected (per datasheet) |
| دبوس 15 | NC — Not connected (per datasheet) |
| دبوس 16 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
SI8662BB-B-IS1 مناسب لـ 7 التطبيقs: Industrial PLC Digital I/O Isolation, Isolated SPI / UART Communication Bridges, Solar Inverter Gate-Drive Signal Isolation, Motor Control Feedback Isolation, Isolated RS-485 / CAN Bus Nodes, Medical Equipment Patient-Isolated Interface, Industrial Fieldbus and Process-Control I/O.
Industrial PLC Digital I/O Isolation
The SI8662BB-B-IS1 is ideally suited for isolating 24V industrial digital I/O channels between field wiring and a 3.3V or 5V MCU backplane. Its 2500 Vrms withstand voltage and 35 kV/us CMTI reject the fast switching transients produced by inductive loads and motor contactors on the field side. Six channels per IC allow a single device to isolate an entire 4-input + 2-output PLC signal bundle, reducing BOM cost versus 1-channel optocouplers. The 2.5V to 5.5V supply range lets the field side run from 24V-to-5V regulation while the logic side connects directly to a 3.3V MCU. Compared to LED-based optocouplers, the RF-coupled architecture avoids LED aging, achieving >50 year operating life in continuous industrial service.
موصى به
Isolated SPI / UART Communication Bridges
For SPI bus isolation between two MCUs or between an MCU and a peripheral across a ground-potential barrier, the SI8662BB-B-IS1 provides the 6 channels needed for SPI (MOSI, MISO, SCK, CS, plus 2 GPIOs) plus 150 Mbps data rate that supports SPI clocks above 50 MHz. Propagation delay of 8 ns typical keeps timing skew under 2 ns channel-to-channel, preserving SPI mode-0 and mode-3 setup/hold margins across the isolation barrier. The wide 2.5V to 5.5V supply range lets a 3.3V MCU side talk to a 5V peripheral side without level shifters. Per the Si866x datasheet, the channel-direction map (B suffix) supports the SPI master-to-slave signal set directly.
موصى به
Solar Inverter Gate-Drive Signal Isolation
In solar inverter and grid-tie power electronics, the SI8662BB-B-IS1 isolates low-side gate-drive PWM signals (typically 10-20 kHz for IGBT bridges or up to 150 kHz for SiC MOSFETs) from the high-voltage DC bus. Six channels fit a full 3-phase half-bridge gate signal set plus a fault-feedback channel. The 35 kV/us minimum CMTI rejects the >20 kV/us common-mode dV/dt produced by hard-switching 600V-1200V IGBT modules without false triggering. With 2500 Vrms withstand, the device meets the basic-insulation level required by IEC 62109 for residential photovoltaic installations when paired with reinforced PCB creepage. The -40C to +125C operating range covers outdoor inverter ambient conditions.
موصى به
Motor Control Feedback Isolation
BLDC and servo motor drives use the SI8662BB-B-IS1 to isolate encoder feedback (Hall sensors, QEI index, and commutation signals) and fault flags between the power stage and the control MCU. The 6 channels handle a typical 3-Hall plus 3-auxiliary feedback bundle in a single device. The 8 ns propagation delay keeps the control loop latency well below the 1 ms torque-loop update period, preserving current-loop bandwidth. With 35 kV/us CMTI, the device tolerates the dV/dt ringing on the motor-phase return path that would otherwise inject false transitions into the encoder logic. The 2.5V to 5.5V supply range accepts the 3.3V MCU I/O directly.
موصى به
Isolated RS-485 / CAN Bus Nodes
For isolated RS-485 or CAN bus transceivers in industrial networks, the SI8662BB-B-IS1 provides the 6 channels needed for TX, RX, DE/RE control, and 3 auxiliary GPIO signals across the isolation barrier. The 150 Mbps data rate is well above CAN (1 Mbps) and even above typical RS-485 (10-50 Mbps) requirements, ensuring the isolator is never the bottleneck. The 2.5 kVrms withstand rating satisfies IEC 61800-3 surge and burst requirements for motor-drive bus nodes. With 35 kV/us CMTI, the device tolerates the ground-potential transients found in long industrial bus cable runs without data corruption.
موصى به
Medical Equipment Patient-Isolated Interface
The SI8662BB-B-IS1 (in the 2500 Vrms B-grade) is well suited for basic patient-isolation interfaces in patient-monitoring devices, infusion pumps, and ECG front-ends. Six channels cover a typical SPI-driven ADC front-end plus a UART link to the host processor. The 8 ns propagation delay and <2 ns channel-to-channel skew preserve the timing integrity required for 16-bit ADC sampling at 1 MSPS. With the Si8662BC-B-IS1 upgrade variant offering 3750 Vrms, the platform can be scaled to 2xMOPP (reinforced) isolation per IEC 60601-1 for patient-connected circuitry. The 2.5V to 5.5V supply range supports low-power 3.3V portable designs. Per the Si866x datasheet, the device family is recognized under UL 1577.
موصى به
Industrial Fieldbus and Process-Control I/O
Process-control transmitters and fieldbus couplers use the SI8662BB-B-IS1 to isolate 4-20 mA loop signals and HART modem data across the hazardous-area barrier. Six channels support HART IN/OUT plus 4 GPIO signals for relay actuation and status LEDs. The 2500 Vrms withstand rating and 35 kV/us CMTI meet the EMC and surge immunity demands of IEC 61000-4-2, IEC 61000-4-4, and IEC 61000-4-5 in process-plant environments. The wide -40 C to +125 C operating range accommodates outdoor field-cabinet temperatures. Per the Si866x datasheet, the device family is qualified for industrial temperature ranges and certified under UL 1577, simplifying compliance documentation.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ SI8662BB-B-IS1 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | SI8662BB-B-IS1R | SI8662BC-B-IS1 | SI8662BB-B-IU | |
|---|---|---|---|---|---|
| Package | NB SOIC-16 (narrow-body) | NB SOIC-16 (narrow-body) - same | NB SOIC-16 (narrow-body) - same | QSOP-16 - same pinout, smaller body | |
| Brand | Skyworks | Skyworks | Skyworks | Skyworks | |
| Number of Channels | 6 | 6 | 6 | 6 | 4 |
| Withstand Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms (+50%) | 2500 Vrms | 2500 Vrms |
| Maximum Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | 1 Mbps (-99%) | 150 Mbps |
| CMTI (Minimum) | 35 kV/us | 35 kV/us | 35 kV/us | 35 kV/us | 35 kV/us |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Propagation Delay (Typical) | 8 ns | 8 ns | 8 ns | 23 ns (slower) | 8 ns |
أبرز الفروقات
- Highest channel count in NB SOIC-16 digital isolator family (مقابلSI8642BB-B-IU (4-channel))
- RF-coupled isolation eliminates LED aging and 1-Mbps limit of optocouplers (مقابلHCPL-1810 optocoupler)
- Wide 2.5V to 5.5V supply range covers 3.3V and 5V logic without level shifters (مقابلISO7721 (3.3V-only typical))
ملاحظات التصميم
Place 0.1 uF low-ESR ceramic bypass capacitors (X7R or X5R dielectric) as close as physically possible to both VDD1 (pin 1) and VDD2 (pin 7). Place a 1 uF bulk capacitor within 1 cm of each VDD pin for low-frequency decoupling. Maintain a minimum 4 mm clearance under the device body (no copper traces, vias, or ground planes between the two isolation domains under the IC) to preserve the 2500 Vrms isolation barrier.
Do not connect GND1 and GND2 at any point on the PCB - this shorts the isolation barrier and defeats the safety function. Each ground domain must be referenced only to its own VDD supply. If a logic-level shift is needed, route signals through the Si8662 channels, never through a discrete wire across the barrier. Ensure the 16-pin SOIC body is fully soldered with proper wicking on all four corners - cold joints on the GND pins degrade CMTI performance.
The RF-coupled isolation architecture can radiate ~50 MHz harmonics into nearby signal traces. Keep the Si8662 at least 5 mm away from RF receiver antennas or high-impedance analog traces. Add a 4-layer PCB stackup with a continuous ground plane on layer 2 to contain common-mode currents on the isolated ground domains. For ESD-sensitive analog sensors on the same PCB, place a ferrite bead in series with the VDD rail feeding the analog side of the isolator.
For SPI isolation above 50 MHz, match the trace lengths of the 4 SPI channels (MOSI, MISO, SCK, CS) within 5 mm to minimize channel-to-channel skew (which is <2 ns per the Si866x datasheet). Avoid stub traces at the device pins; route directly into the IC bond pad. Use 50 ohm controlled impedance on the logic-side traces if the SPI clock exceeds 75 MHz, and add a 22 ohm series resistor at the driver output to dampen ringing.
معلومات الامتثال
RoHS and lead-free per Skyworks product page. UL 1577 recognition and IEC 60747-17 / VDE 0884 certification apply to the Si86xx family per datasheet. AEC-Q100 qualification status not stated in verified data - mark 'unknown' if needed.
