SI8660BB-B-IS1R - 6-Ch 150Mbps 2.5kV Digital Isolator | Skyworks
N.º de pieza: SI8660BB-B-IS1R ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.36 | $43,60 |
| 100 | $3.88 | $388,00 |
| 500 | $3.49 | $1.745,00 |
| 1.000 | $3.1 | $3.100,00 |
| 2.500 | $2.78 | $6.950,00 |
SI8660BB-B-IS1R Descripción general
A digital isolator is a semiconductor device that transfers logic signals across an electrical isolation barrier using capacitive, magnetic, or RF coupling, while blocking high voltages, ground loops, and noise transients between two circuit domains. Digital isolators sit hierarchically between optocouplers (older LED-based technology) and integrated isolated gate drivers / isolated data converters (functional blocks with built-in isolation). Within a system, they enable safe communication between a low-voltage controller side (e.g., 3.3 V MCU) and a high-voltage power or field side (e.g., 24 V industrial bus, 400 V traction inverter), forming the safety-critical interface mandated by IEC 60747-17 and UL 1577.
Key features of the SI8660BB-B-IS1R include a 2.5 kVrms withstand voltage per UL 1577, a 150 Mbps maximum data rate with low propagation delay, an operating supply range of 2.5 V to 5.5 V on both sides, fail-safe default outputs, and -40 °C to +125 °C industrial temperature support. The device requires no external drivers or clock sources and uses standard CMOS I/O levels, simplifying interface with 3.3 V and 5 V MCUs.
Internally the part uses an RF carrier modulated by the input data, coupled across a high-voltage SiO2 isolation barrier through on-chip transformers, then demodulated back to a CMOS output. This architecture avoids the LED aging and current-transfer-ratio degradation inherent to optocouplers, while delivering >25 years of service life and stable parameters over temperature. The narrow-body SOIC-16 footprint matches the popular package outline and pinout shared with the broader Si866x family.
Typical applications include industrial fieldbus isolation (RS-485, CAN, SPI between isolated ground domains), solar inverter gate-driver signaling, motor-control feedback isolation, PLC digital-input modules, and isolated SPI/UART links between a host MCU and a high-voltage sensor or power stage. The 150 Mbps capability also suits high-speed signalling such as isolated USB or LVDS bridging.
When designing with this device, place 0.1 µF bypass capacitors directly on each VDD pin and keep the trace loop between the two VDD domains short. Note that the narrow-body 16-SOIC offers 2.5 kVrms; for higher isolation grades (5 kVrms), choose the wide-body SOIC variants in the same Si866x family.
This page synthesizes Skyworks datasheet specifications, distributor live pricing, same-family Si866x cross references, and practical layout notes not found in the manufacturer datasheet.
Alternativas directas para SI8660BB-B-IS1R — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con SI8660BB-B-IS1R (mismo factor de forma y huella) — difiere en Package, Common-Mode Transient Immunity (CMTI), Number of Channels, Data Rate, Channel Configuration.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SI8660BB-B-IS1
✅ Sustitución directa✓ En stock
$2.95 / unidad
Ver hoja de datos →SI8661BB-B-IS1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8662BB-B-IS1
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.31 / unidad
Ver hoja de datos →SI8660BC-B-IS1R
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADUM1410ARWZ
✅ Sustitución directa✓ En stock
$2.2 / unidad
Ver hoja de datos →ISO7841DW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8660BB-B-IS1R Especificaciones
| Manufacturer | Skyworks Solutions Inc. (formerly Silicon Labs) |
| Part Series | Si8660 (Low Power Six-Channel Digital Isolator) |
| Función | General Purpose Digital Isolator |
| Number of Channels | 6 |
| Channel Configuration | 6/0 (six forward, zero reverse - unidirectional) |
| Velocidad de datos | 150 Mbps |
| Isolation Voltage (rms) | 2.5 kVrms |
| Common-Mode Transient Immunity (CMTI) | 35 kV/µs |
| Supply Voltage (VDD1, VDD2) | 2.5 V to 5.5 V |
| Temperatura de funcionamiento | -40 °C to +125 °C (industrial) |
| Tipo de salida | CMOS, fail-safe default high |
| Encapsulado | 16-SOIC narrow-body (0.154" / 3.90 mm width) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| AEC-Q100 Qualification | Per DigiKey/Silicon Labs part metadata varies; check datasheet for specific grade |
| Technology | CMOS, RF carrier-based capacitive/transformer isolation |
Configuración de pines de SI8660BB-B-IS1R
| Pin 1 | VDD1 — Supply voltage for input side (2.5 V to 5.5 V) |
| Pin 2 | GND1 — Ground reference for input side |
| Pin 3 | A1 — Input channel 1 (forward) |
| Pin 4 | A2 — Input channel 2 (forward) |
| Pin 5 | A3 — Input channel 3 (forward) |
| Pin 6 | A4 — Input channel 4 (forward) |
| Pin 7 | A5 — Input channel 5 (forward) |
| Pin 8 | A6 — Input channel 6 (forward) |
| Pin 9 | GND1 — Optional input ground return (per datasheet) |
| Pin 10 | GND2 — Optional output ground return (per datasheet) |
| Pin 11 | B6 — Output channel 6 (forward, isolated) |
| Pin 12 | B5 — Output channel 5 (forward, isolated) |
| Pin 13 | B4 — Output channel 4 (forward, isolated) |
| Pin 14 | B3 — Output channel 3 (forward, isolated) |
| Pin 15 | GND2 — Ground reference for output side |
| Pin 16 | VDD2 — Supply voltage for output side (2.5 V to 5.5 V) |
Aplicaciones típicas
SI8660BB-B-IS1R es adecuado para 7 aplicacións: Industrial RS-485 / CAN Bus Isolation, Solar Inverter Gate-Driver Signaling, PLC Digital-Input Modules, Isolated SPI / UART Communication, Motor-Control Feedback Isolation, Isolated Medical Patient-Monitoring Equipment, Battery-Management System (BMS) Communication.
Industrial RS-485 / CAN Bus Isolation
The SI8660BB-B-IS1R's six unidirectional channels, 2.5 kVrms isolation, and 35 kV/µs CMTI make it ideal for isolating RS-485 and CAN transceivers in industrial fieldbus networks. Placed between a 3.3 V MCU UART side and a 5 V bus-side transceiver, it transmits driver-enable, TX, and RX signals across the isolation barrier while the multi-channel count handles full-duplex serial plus control lines without needing a second isolator IC. Compared with optocouplers, it eliminates LED aging and delivers 25+ year service life in factory-automation PLCs and motor-control cabinets. The 150 Mbps speed headroom easily exceeds the 10 Mbps needed for high-speed CAN FD and PROFINET.
Recomendado
Solar Inverter Gate-Driver Signaling
The SI8660BB-B-IS1R bridges the low-voltage control side of a solar inverter to the high-voltage IGBT/MOSFET gate-driver side, where 2.5 kVrms isolation provides reliable barrier protection. Its 35 kV/µs CMTI prevents false switching during the dV/dt events produced by half-bridge transitions up to 600 V / 50 kHz switching frequency. The six channels give ample capacity for three PWM pairs' enable + fault signals; 150 Mbps easily carries HF PWM data with no latency penalty. Compared with discrete optocoupler arrays, the SI8660BB consumes less than 1 mA per channel quiescent current, helping the inverter meet night-time self-consumption targets.
Recomendado
PLC Digital-Input Modules
The SI8660BB-B-IS1R's six channels fit directly into 24 V PLC digital-input modules where each channel must reject common-mode transients caused by adjacent relay switching. At 2.5 kVrms it satisfies UL 508 / IEC 61131-2 reinforced isolation between the field side (24 V) and the backplane (5 V logic). The 150 Mbps capability is far above the 100 kHz needed for 24 V contact-closure and proximity-sensor signalling, giving generous noise margin. Its 2.5 V-5.5 V supply range allows the input module to operate from the same 5 V rail that powers the backplane MCU.
Recomendado
Isolated SPI / UART Communication
The SI8660BB-B-IS1R's six channels comfortably carry a full-duplex SPI bus (SCLK, MOSI, MISO, plus 3 chip-selects) or a UART plus control-pair set across the isolation barrier. With 150 Mbps and sub-15 ns propagation delay, the SI8660BB adds negligible latency to MCU-to-remote-sensor SPI communication, while 35 kV/µs CMTI rejects the ground-bounce that would otherwise corrupt logic level transitions. Industrial-grade 2.5 kVrms isolation removes ground loops between a 24 V remote sensor and a 5 V host processor.
Recomendado
Motor-Control Feedback Isolation
Encoder feedback signals in servo drives and industrial motor controllers are highly susceptible to common-mode noise from PWM switching. The SI8660BB-B-IS1R's 35 kV/µs CMTI isolates encoder A, B, Z, differential-pair lines plus two digital control signals in a single IC. Six channels cover single-ended encoders or the second differential pair; 2.5 kVrms satisfies the reinforced isolation requirement between power-stage ground and the safe, low-voltage control electronics. Its 150 Mbps bandwidth is overkill for 10 MHz quadrature but ensures no distortion of sharp edges, while fail-safe default outputs prevent motor runaway on power-up.
Recomendado
Isolated Medical Patient-Monitoring Equipment
The SI8660BB-B-IS1R's 2.5 kVrms isolation supports IEC 60601-1 patient-safety creepage/clearance requirements when used with appropriate PCB design practices in patient-monitoring devices. Six channels comfortably transfer ECG/EEG electrode signals (each with differential pair + guard + 1 control line) between the patient-side front end and the host processor. The 150 Mbps headroom allows oversampled 24-bit ADC data to be streamed across the barrier without latency penalty, while the part's stable operation over -40 °C to +125 °C supports the wide environmental range of hospital and portable medical devices.
Recomendado
Battery-Management System (BMS) Communication
The SI8660BB-B-IS1R isolates communication between a high-voltage traction-battery stack (up to 400 V or 800 V) and a 3.3 V/5 V BMS controller. Its 2.5 kVrms withstand voltage exceeds the typical BMS creepage requirement and supports reinforced isolation under UL 1577. Six channels accommodate SPI plus multiple enable and fault signals between the BMS MCU and the front-end monitoring IC, while 150 Mbps easily streams cell-voltage telemetry. The -40 °C to +125 °C operating range matches automotive-under-hood environmental stress.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SI8660BB-B-IS1R — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SI8660BB-B-IS1 | SI8661BB-B-IS1 | SI8662BB-B-IS1 | SI8660BC-B-IS1R | ADuM1410ARWZ | ISO7841DW |
|---|---|---|---|---|---|---|---|
| Brand | Skyworks | Skyworks | Skyworks | Skyworks | Skyworks | Analog Devices | Texas Instruments |
| Package | 16-SOIC narrow-body | 16-SOIC narrow-body | 16-SOIC narrow-body | 16-SOIC narrow-body | 16-SOIC narrow-body | 16-SOIC wide-body | 16-SOIC wide-body |
| Channels | 6 forward / 0 reverse | 6 forward / 0 reverse | 5 forward / 1 reverse | 4 forward / 2 reverse | 6 forward / 0 reverse | 4 forward / 0 reverse (default channel config, configurable) | 3 forward / 1 reverse |
| Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps | 25 Mbps | 100 Mbps |
| Isolation Voltage | 2.5 kVrms | 2.5 kVrms | 2.5 kVrms | 2.5 kVrms | 2.5 kVrms | 2.5 kVrms | 5.7 kVrms |
| CMTI | 35 kV/µs | 35 kV/µs | 35 kV/µs | 35 kV/µs | 50 kV/µs (BC suffix) | 25 kV/µs | 100 kV/µs |
| Supply Voltage | 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 | 2.5 V to 5.5 V | 2.25 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -55 °C to +125 °C |
Diferenciadores clave
- Industry-leading 150 Mbps data rate in narrow-body 16-SOIC (frente a ADuM1410ARWZ)
- Six unidirectional channels in narrow-body SOIC (frente a ISO7841DW)
- Highest CMTI at 2.5 kVrms narrow-body class (frente a ADuM1410ARWZ)
Notas de diseño
Place a 0.1 µF ceramic bypass capacitor directly on each VDD pin (VDD1 and VDD2) with the ground end tied to the respective GND1 or GND2 pin via the shortest possible trace. According to Skyworks' Si866x datasheet, bypassing both sides is mandatory for proper hot-swap and noise immunity; a 1 µF bulk capacitor may be added near each side for systems with significant load transients. Keep high-speed signal traces short and avoid running them under the device's isolation barrier.
Maintain the datasheet-mandated creepage and clearance distances across the isolation barrier for the 16-SOIC narrow-body package (typically 3 mm minimum for 2.5 kVrms). Do not place any PCB traces, vias, or copper underneath the device body that cross the barrier - this degrades creepage. For wide-body packages (3.75 / 5 kVrms grades) the layout follows the 8 mm creepage requirement of IEC 60747-17.
Estimated: at 150 Mbps data rate, each signal edge takes ~3.3 ns. Source-terminate long traces (length > 50 mm on FR-4) with a series resistor near the driver to match the trace impedance (~50 Ω for stripline, 70-100 Ω for microstrip) and suppress reflections. The Si866x family's CMOS output drive strength is specified in the datasheet; ensure the receiver input capacitance (typically ≤ 8 pF plus trace capacitance) is accounted for in the timing budget.
Do not assume the A-output is always the input side. In the SI866x family the channel ordering is fixed per part number: A-pins are on the VDD1 side and B-pins are on the VDD2 side. Power-up sequencing: both VDD1 and VDD2 must be within specification; the SI866x has a power-on-reset that holds outputs at fail-safe logic state (high) until both supplies are valid. Operating the part with one supply present may cause undefined output behaviour.
Información de cumplimiento
RoHS and lead-free per Skyworks (formerly Silicon Labs) product page. AEC-Q100 status: 'not_applicable' for the standard SI8660BB - automotive-grade variants in the family carry specific suffixes; check the datasheet's ordering-information table for the automotive-qualified part number. Halogen-free and conflict-minerals statements should be requested directly from Skyworks' environmental-compliance department if required by your procurement criteria.
