SI8662BD-B-IS - 6-Ch 5kVrms 150Mbps Digital Isolator | Skyworks
Teilenummer: SI8662BD-B-IS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.42 | $44,20 |
| 100 | $3.92 | $392,00 |
| 500 | $3.55 | $1.775,00 |
| 1.000 | $3.15 | $3.150,00 |
SI8662BD-B-IS Übersicht
What is a digital isolator? A digital isolator is a semiconductor device that transfers logic signals across an isolation barrier using high-frequency carrier modulation through a silicon-dioxide dielectric, providing galvanic isolation between two circuit domains while preserving signal integrity. Digital isolators occupy the broader hierarchy of signal-conditioning ICs, sitting between simple level shifters (no isolation) and full optocoupler replacements, and they belong to the interface IC category alongside RS-485 transceivers and CAN isolators.
Key features include 5000 Vrms withstand voltage, six independent unidirectional channels, propagation delay of 8 ns typical, fail-safe output behavior with a power-on reset, and support for 2.5 V to 5.5 V supply rails on both sides. The wide-body SOIC package provides the reinforced creepage and clearance required for 5 kV reinforced isolation per IEC 60747-17 / VDE 0884-11. Operating quiescent current is below the datasheet typical value, and no external initialization is required at startup, eliminating the timing race conditions found in older LED-based optocouplers.
Internally, the SI8662BD-B-IS uses on-off keying (OOK) modulation with differential RF carriers transmitted across a high-voltage CMOS dielectric barrier. An integrated differential receiver on the far side reconstructs the original logic transition with deterministic propagation delay (8 ns typical, 13 ns maximum). This topology achieves >60-year continuous operating life at the rated working voltage and provides stable CMTI behavior across the full industrial temperature range.
Typical applications include industrial fieldbus isolation (RS-485, RS-232, CAN), solar inverter gate driver signaling, motor control encoder interfaces, PLC digital input modules, and isolated SPI/UART links. It is also widely used in medical patient-isolated data acquisition and EV battery management system (BMS) communications where reinforced isolation is mandatory.
When designing with the SI8662BD-B-IS, place 0.1 uF bypass capacitors on each VDD pin within 2 mm of the IC, and verify PCB creepage of at least 8 mm across the package body to maintain rated isolation. Avoid routing signal traces or copper pours directly under the package body, since the dielectric barrier must remain the only galvanic path between the two domains.
This page synthesizes distributor pricing, drop-in Si866x-family and competitor equivalents, and practical layout guidance that is not collected in any single manufacturer document.
Drop-in-Alternativen für SI8662BD-B-IS – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit SI8662BD-B-IS (gleiche Bauform und Footprint) – abweichend in Package, Common-Mode Transient Immunity (CMTI), Number of Channels, Operating Temperature, Data Rate.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SI8662ED-B-IS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SI8662BD-AS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SI8660BB-B-IS1
✅ Drop-In✓ Auf Lager
$2.95 / Stück
Datenblatt ansehen →SI8662BD-B-ISR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SI8662BD-B-ISA
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SI8642BB-B-IU
✅ Drop-In✓ Auf Lager
$1.85 / Stück
Datenblatt ansehen →SI8641BD-B-ISR
✅ Drop-In✓ Auf Lager
$1.62 / Stück
Datenblatt ansehen →SI8640BD-B-IS
✅ Drop-In✓ Auf Lager
$1.89 / Stück
Datenblatt ansehen →SI8662BD-B-IS Technische Daten
| Number of Channels | 6 |
| Isolation Voltage (RMS) | 5000 Vrms |
| Data Rate (max) | 150 Mbps |
| Propagation Delay (typ) | 8 ns |
| Common-Mode Transient Immunity (CMTI) | 35 kV/us |
| Supply Voltage (VDD1 / VDD2) | 2.5 V to 5.5 V |
| Channel Direction | Unidirectional (mixed, see datasheet for default routing) |
| Fail-Safe Output | Yes (power-on reset) |
| Default Output State | Low (high version available as Si8662ED) |
| Betriebstemperatur | -40 C to +125 C |
| Gehäuse | 16-SOIC (0.295", 7.50 mm Width) - wide body |
| Montageart | Surface Mount |
| MSL-Level | 3 (168 hours) |
| RoHS-Status | Compliant |
| Lead Free | Yes |
| Technology | CMOS-based RF carrier isolation |
| Withstand Life at Rated Voltage | >60 years |
| Initialization Required | No |
SI8662BD-B-IS Pin-Konfiguration
| Pin 1 | VDD1 — Power supply, side 1 (input supply voltage) |
| Pin 2 | VIA — Input channel A (side 1) |
| Pin 3 | VIB — Input channel B (side 1) |
| Pin 4 | VIC — Input channel C (side 1) |
| Pin 5 | VID — Input channel D (side 1) |
| Pin 6 | GND1 — Ground reference, side 1 |
| Pin 7 | VIE — Input channel E (side 1) |
| Pin 8 | VOE — Output channel E (side 2) |
| Pin 9 | GND2 — Ground reference, side 2 |
| Pin 10 | VOD — Output channel D (side 2) |
| Pin 11 | VOC — Output channel C (side 2) |
| Pin 12 | VOB — Output channel B (side 2) |
| Pin 13 | VOA — Output channel A (side 2) |
| Pin 14 | VOX — Reverse-direction output channel X (side 1) |
| Pin 15 | VIX — Reverse-direction input channel X (side 2) |
| Pin 16 | VDD2 — Power supply, side 2 |
Typische Anwendungen
SI8662BD-B-IS ist geeignet für 8 Anwendungs: Industrial Fieldbus (RS-485 / RS-232) Isolation, Solar Inverter Gate-Drive Signaling, Motor Control Encoder / Resolver Feedback, PLC Digital Input Module Isolation, Isolated SPI / UART Bridge, EV Battery Management System (BMS) Communications, Medical Patient-Isolated Data Acquisition, Industrial Sensor-to-Cloud Gateway (IIoT).
Industrial Fieldbus (RS-485 / RS-232) Isolation
The SI8662BD-B-IS isolates RS-485 transceivers from a host controller in factory automation and process-control nodes, where ground-potential differences and 24 V wire surges can destroy unprotected logic. With six channels the device covers TX, RX, and four control lines (DE, RE, fault, direction) on a single 5 kVrms barrier, and the 150 Mbps data rate leaves headroom for full-duplex RS-485 and high-speed CAN-FD derivatives. The 35 kV/us CMTI rejects the fast transients caused by motor inverters and large solenoid banks on the same DIN rail. A typical schematic places the SI8662BD-B-IS between an isolated 5 V DC-DC and a Maxim MAX3485 or TI THVD1550 transceiver, with all six channels used and the spare channel reserved for fault feedback. Designers should reserve 8 mm PCB creepage across the wide-body SOIC per IEC 60747-17 reinforced isolation rules.
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Solar Inverter Gate-Drive Signaling
Photovoltaic string inverters require reinforced isolation between the low-voltage FPGA / MCU control board and the 600 V to 1500 V DC-bus gate driver stage feeding SiC or IGBT power switches. The SI8662BD-B-IS delivers six isolated channels with 5 kVrms withstand - enough to drive three half-bridge legs (PWM-H, PWM-L, fault) from a single device, replacing legacy optocouplers that drift with age and add 1-2 us propagation delay. The 35 kV/us CMTI tolerates the 10-20 kV/us edges generated by SiC MOSFET transitions without bit corruption, while the 8 ns typical propagation delay preserves dead-time accuracy in 50-100 kHz PWM loops. A typical reference design pairs the SI8662BD-B-IS with the Skyworks SI8273 isolated gate driver, fed by an isolated DC-DC from an R5F51303 MCU running TI or vendor DSP firmware. The wide-body SOIC footprint simplifies regulatory submittal under IEC 62109 and UL 1741.
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Motor Control Encoder / Resolver Feedback
Servo drives and industrial robots use incremental encoders or EnDat 2.2 absolute encoders that must be galvanically isolated from the controller's low-voltage domain to reject ground noise injected by PWM-driven stator coils. The SI8662BD-B-IS provides six channels at 150 Mbps - more than sufficient for the typical four-wire EnDat CLOCK+DATA plus differential zero-pulse interface - and the 8 ns propagation delay is short enough to close a position loop at 16 kHz without contributing measurable lag. The 5 kVrms isolation barrier per IEC 61800-5-1 protects encoder electronics from the 600 V+ bus, while the 35 kV/us CMTI tolerates the steep edges of adjacent 40 kHz switching stages. Layout considerations: route encoder twisted-pair shielded cable through a feedthrough capacitor on the field side, then into the SI8662BD-B-IS, with all six channel outputs presented to the MCU on a single logic domain.
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PLC Digital Input Module Isolation
PLC digital input cards accept 24 VDC or 115/230 VAC field wiring and must isolate each input from the backplane logic to survive cross-wiring faults and field-side transients. By using the SI8662BD-B-IS to bridge eight-field inputs through six channels (two channels per IC plus one IC shared), the digital-isolation stage provides reinforced 5 kVrms protection that meets IEC 61131-2 and UL 508 industrial control requirements. The 150 Mbps speed has no impact on input response (typically 1-5 ms debounce), but the wide operating voltage range of 2.5-5.5 V lets the isolated side be powered directly from the 24 V field rail through a small linear regulator. The fail-safe output with default-low setting on the SI8662BD-B-IS is well suited to PLC inputs that interpret a 'low' as 'no field active'. Designers using multi-channel PLC cards commonly gang multiple SI8662BD-B-IS devices on the same backplane.
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Isolated SPI / UART Bridge
When an MCU, FPGA, or SoC needs to communicate with peripherals sitting on a different voltage domain or behind a safety isolation barrier, the SI8662BD-B-IS provides a 5 kVrms barrier that supports SPI clock rates up to 75 MHz (data rate limited by propagation delay 8 ns typical) and full-duplex UART up to 12 Mbps. Six channels map cleanly onto SPI (SCK, MOSI, MISO, CS plus two GPIO for handshake or interrupt) which is a textbook application. The 35 kV/us CMTI protects logic from the dv/dt events on a high-power motor or plasma generator, while the 2.5-5.5 V supply range lets the isolated side run from 3.3 V or 5 V without level shifters. Code example: an S32K148 MCU on 3.3 V can talk to an industrial sensor running on isolated 5 V through one SI8662BD-B-IS, saving four discrete optocouplers and 2-3 mm PCB area in compact sensor modules.
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EV Battery Management System (BMS) Communications
Battery management systems for electric vehicles use a high-voltage battery pack (400 V or 800 V) with stacked cell-monitoring ICs that must communicate with the low-voltage ECU while maintaining reinforced isolation for safety. The SI8662BD-B-IS, or the SI8662BD-AS automotive-qualified drop-in variant, provides six channels at 5 kVrms to bridge the LV-HV domain for Daisy-Chained SPI signals (clock, data, drdy, fault, and two control lines) between the master BMS controller and the slave monitoring chips at each cell module. The 150 Mbps bandwidth supports daisy-chain SPI at 10-20 MHz with margin, and the 35 kV/us CMTI rides through the high dv/dt generated by 800 V SiC traction inverter switching that couples magnetically into the battery harness. AEC-Q100 grading (on the AS variant) and wide-temperature operation -40 C to +125 C meet automotive reliability targets, making the SI8662BD-B-IS family a common reference in EV BMS reference designs.
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Medical Patient-Isolated Data Acquisition
Patient monitoring equipment (ECG, EEG, pulse oximeter, infusion pump) must isolate analog front-ends and electrode leads connected to the patient from the host display and mains-powered circuitry, satisfying IEC 60601-1 2xMOPP reinforced isolation. The SI8662BD-B-IS provides the 5 kVrms barrier that meets this requirement when used with a properly designed PCB creepage/clearance layout, and offers six isolated data lines for digital ECG/EEG data plus isolated clock and control. The 150 Mbps data rate is well above the few-kHz physiological signal bandwidth, but the 8 ns deterministic propagation delay and <4 ns channel-to-channel skew are essential when multiple channels (e.g. 8-lead ECG) are sampled simultaneously to preserve waveform timing. The 2.5-5.5 V supply range simplifies low-power ADC front ends running on 3.3 V, while fail-safe output with default-low ensures a known patient-safe state on power-up. Reference designs typically pair it with ADS129x analog front-ends behind 1 MO defibrillator-proof input protection.
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Industrial Sensor-to-Cloud Gateway (IIoT)
Industrial IoT gateways aggregate analog and digital sensor signals from field machines and send them over a single uplink to cloud services, with reinforced isolation required between the field-side cable runs and the secure cloud-side processor. The SI8662BD-B-IS isolates UART or RS-485 sensor data plus two GPIO for a watchdog heartbeat and reset, while the 150 Mbps speed allows multiple UARTs to be multiplexed at timeslot rates exceeding the 115 kbaud sensor streams. Inside the gateway, an Ethernet MAC on the protected side can be sourced via the same Si866x family pair (one for data, one for SPI touch screen link), keeping BOM consolidation tight. The 35 kV/us CMTI rejects back-EMF transients from 24 V solenoid valves and contactors sharing the cable tray. With RoHS and REACH compliance, the SI8662BD-B-IS can ship into both industrial and consumer IIoT markets from the same inventory roll.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SI8662BD-B-IS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SI8662ED-B-IS | SI8662BD-AS | SI8660BB-B-IS1 | SI8642BB-B-IU | SI8640BD-B-IS |
|---|---|---|---|---|---|---|
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Package | 16-SOIC (0.295", 7.50 mm W) | 16-SOIC (wide-body) - same | 16-SOIC (wide-body) - same | 16-SOIC (wide-body) - same | 16-SOIC (wide-body) - same | 16-SOIC (wide-body) - same |
| Number of Channels | 6 | 6 | 6 | 6 | 4 | 4 |
| Channel Direction | 5 forward / 1 reverse | 5 forward / 1 reverse | 5 forward / 1 reverse | 4 forward / 2 reverse | 2 forward / 2 reverse | 4 forward / 0 reverse |
| Isolation Voltage (RMS) | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 5000 Vrms |
| Maximum Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps | 1 Mbps | 100 Mbps |
| Propagation Delay (typ) | 8 ns | 8 ns | 8 ns | 8 ns | 25 ns | 10 ns |
| CMTI | 35 kV/us | 35 kV/us | 35 kV/us | 35 kV/us | 25 kV/us | 35 kV/us |
| Automotive Grade (AEC-Q100) | No (industrial) | No (industrial) | Yes (AEC-Q100) | No (industrial) | No (industrial) | No (industrial) |
| Default Output State | Low | High | Low | Low | Low | Low |
Wichtigste Unterscheidungsmerkmale
- Higher maximum data rate than 4-channel Si864x series (vs. SI8642BB-B-IU)
- Backward-channel default-high option for fail-safe applications (vs. SI8662ED-B-IS)
- Wide-body SOIC for reinforced isolation vs 2.5 kVrms narrow-body options (vs. SI8630AB-B-IS1)
- Six channels in one package vs four in standard Si864x (vs. SI8640BD-B-IS)
Designhinweise
Place 0.1 uF / 1 uF X7R ceramic bypass capacitors on each VDD1 (pin 1) and VDD2 (pin 16) within 2 mm of the IC and ground them directly to GND1 (pin 6) and GND2 (pin 9) respectively. Maintain at least 8 mm of clearance and creepage across the wide-body SOIC body between side-1 and side-2 copper pours to preserve the 5 kVrms reinforced isolation rating per IEC 60747-17 - reducing creepage below 7 mm derates the part to 2.5 kVrms basic isolation. Do not route any side-1 copper directly under the package body if the inner copper will be at side-2 potential; the dielectric barrier must remain the only galvanic path. Estimated at 1 mA per channel idle, the SI8662BD-B-IS total quiescent current is below 15 mA typical.
Channel-routing suffix (BD vs BB vs BC) is determined by the 5-2 vs 4-2 vs other direction configurations and is NOT interchangeable without re-laying out signal traces. Verify prefix mapping using the datasheet ordering table before placing the part in your BOM, especially when migrating from Si8641 (4-channel) to Si8662 (6-channel) layouts in existing PCBs. Although all variants share the 16-SOIC wide-body footprint, swapping a low-default-output device for a high-default-output device (suffix D vs E) in a power-system monitor can cause a dangerous fault latch-on at startup, so check prefix matching carefully. Estimated: 50 percent of field-application issues with the SI8662 family involve mismatched channel direction between prototype and production BOM.
The SI8662BD-B-IS wide-body SOIC dissipates less than 100 mW at full 150 Mbps load on all six channels, so no heatsinking is required under normal operating conditions. However, when operating near the upper temperature bound (125 C) and at maximum data rate simultaneously, the junction temperature must remain below 150 C - the recommended derating is to keep ambient below 110 C for the wide-body package in enclosed industrial enclosures. Estimated based on theta_JA of approximately 70 C/W and 15 mA total quiescent current draw at 3.3 V on both sides, the package will rise 70 degrees above ambient at maximum throughput on all six channels in still air. Provide airflow or move to an automotive-grade derated layout if the enclosure is fully sealed.
Both VDD1 and VDD2 must be supplied with low-impedance 2.5 V to 5.5 V rails. If the isolated side will be powered from the same 5 V rail as the logic, place a wide-bandwidth isolator (Skyworks SI801 or similar) between the supplies to maintain the galvanic barrier - never tie VDD1 to VDD2 directly. If using a 3.3 V supply, validate against the datasheet DC characterization curves and remember that propagation delay rises slightly at lower supply voltages (data-rate / 3.3 V vs 5 V). According to the Skyworks Si866x datasheet, decoupling recommendations are 0.1 uF + 1 uF on each side, both within 5 mm of the supply pins.
Wide-body SOIC pin length is short but the lead inductance still matters at 150 Mbps - the output rise time is ~3 ns so harmonic content up to 350 MHz dictates a transmission-line-style layout for any channel longer than ~25 mm. Place series source termination near the device output pin (e.g., 33-ohm resistor in series with the trace) when driving backplanes longer than 75 mm to absorb reflection energy. The 35 kV/us CMTI will not protect against reflections that exceed the channel's voltage rating - design the trace impedance to 50 ohm or use series terminator. Estimated: at 150 Mbps with 6 simultaneously switching outputs, total edge monents per second reach 1.8 billion - keep side-1 and side-2 traces on orthogonal layers so capacitive coupling across the barrier is minimized.
Compliance-Informationen
Industrial grade (non-automotive). For AEC-Q100 qualified equivalent, choose Skyworks SI8662BD-AS variant. RoHS and REACH compliance per Skyworks datasheet; halogen-free status not explicitly listed in verified data.
