SI8380P-IU - 8-Ch 24V Digital Isolator 2.5kV | Skyworks
N.º de pieza: SI8380P-IU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $13.8 | $13,80 |
| 10 | $12.42 | $124,20 |
| 100 | $11.05 | $1.105,00 |
| 500 | $9.95 | $4.975,00 |
| 1.000 | $8.85 | $8.850,00 |
SI8380P-IU Descripción general
A digital isolator is an integrated circuit that transfers logic signals between two galvanically isolated domains using capacitive, inductive, or optical coupling while blocking DC and low-frequency voltages up to the rated isolation voltage. Isolators sit between the field side (24 V sensors, switches, actuators) and the logic side (microcontroller, SoC) to protect downstream circuitry from transients, ground loops, and fault voltages on the field wiring. Within the broader IC taxonomy, digital isolators belong to interface ICs, which in turn sit under signal conditioning and inter-domain connectivity.
Key features of the SI8380P-IU include eight channels in a single package, low 1 mA typical input current per channel, integrated safety-rated isolation eliminating the need for external optocouplers, CMOS-based LED emulator technology enabling bipolar (sinking or sourcing) capability, and no isolated-side VDD required because power is harvested from the input current. The device provides logic-level outputs on the controller side that interface directly with 2.25 V to 5.5 V MCU I/O rails.
Architecturally, the SI8380P-IU combines an input-side current-limiting front end, a CMOS-LED emulator that generates an optically-equivalent modulation signal, an integrated isolation barrier using Silicon Labs' proprietary capacitive or transformer coupling, and an output-side demodulator. This topology replaces legacy optocoupler-based designs that required external current-limit resistors, discrete photodiodes, and bulky isolation components, while improving speed, CMTI, and aging behavior.
Typical applications include 24 V PLC digital input modules, industrial sensor interfaces (proximity sensors, limit switches, push-buttons), motor-drive digital I/O isolation, building automation input cards, and any system requiring IEC 61131-2 type 1/2/3 input compliance. The wide input voltage range and bipolar capability allow the same part to handle both sourcing (PNP-style) and sinking (NPN-style) field wiring without redesign.
When designing with this part, verify that the field-side input current meets the 1 mA typical requirement through proper resistor selection at the input pin. The QSOP-20 footprint is pin-compatible with other Si838x family variants, allowing easy migration to higher channel count or different polarity configurations. Always observe creepage and clearance requirements for the 2.5 kVRMS isolation rating per IEC 60747-17 in the PCB layout.
This page synthesizes distributor pricing, drop-in Si838x family alternatives, IEC 61131-2 application context, and PCB layout guidance not consolidated on any single manufacturer or distributor page.
Alternativas directas para SI8380P-IU — 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 SI8380P-IU (mismo factor de forma y huella) — difiere en Common-Mode Transient Immunity (CMTI), Number of Channels, Package, Propagation Delay.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SI8382P-IU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8384P-IU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8380P-IUR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8380IS-IU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI8273AB-IM
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.62 / unidad
Ver hoja de datos →SI8380P-IU Especificaciones
| Isolation Voltage | 2500 Vrms |
| Number of Channels | 8 |
| Data Rate (max) | 2 Mbps |
| Data Rate (typical guaranteed) | 250 kbps |
| Common-Mode Transient Immunity (CMTI) | 200 kV/µs |
| Propagation Delay | 84 ns |
| Input Voltage Range (field side) | 24 V nominal |
| Input Current (per channel, typical) | 1 mA |
| Logic-Side Supply Voltage (VDD) | 2.25 V to 5.5 V |
| Input Type | Bipolar (sinking or sourcing) |
| IEC 61131-2 Compliance | Type 1, 2, 3 |
| Output Polarity | Unidirectional |
| Technology | CMOS LED emulator |
| Encapsulado | 20-SSOP (QSOP, 0.154" / 3.90 mm width) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de SI8380P-IU
| Pin 1 | IN1 — Field-side input channel 1 (24 V bipolar) |
| Pin 2 | IN2 — Field-side input channel 2 (24 V bipolar) |
| Pin 3 | IN3 — Field-side input channel 3 (24 V bipolar) |
| Pin 4 | IN4 — Field-side input channel 4 (24 V bipolar) |
| Pin 5 | IN5 — Field-side input channel 5 (24 V bipolar) |
| Pin 6 | IN6 — Field-side input channel 6 (24 V bipolar) |
| Pin 7 | IN7 — Field-side input channel 7 (24 V bipolar) |
| Pin 8 | IN8 — Field-side input channel 8 (24 V bipolar) |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | GND — Ground reference for logic side |
| Pin 11 | OUT8 — Logic-side output channel 8 |
| Pin 12 | OUT7 — Logic-side output channel 7 |
| Pin 13 | OUT6 — Logic-side output channel 6 |
| Pin 14 | OUT5 — Logic-side output channel 5 |
| Pin 15 | OUT4 — Logic-side output channel 4 |
| Pin 16 | OUT3 — Logic-side output channel 3 |
| Pin 17 | OUT2 — Logic-side output channel 2 |
| Pin 18 | OUT1 — Logic-side output channel 1 |
| Pin 19 | VDD — Logic-side supply voltage (2.25 V to 5.5 V) |
| Pin 20 | NC — Not connected (per datasheet) |
Aplicaciones típicas
SI8380P-IU es adecuado para 6 aplicacións: 24V PLC Digital Input Module, Industrial Sensor Interface, Motor Drive Digital I/O Isolation, Building Automation Input Card, Process Control I/O Module, Renewable Energy Inverter Interface.
24V PLC Digital Input Module
The SI8380P-IU integrates eight 24 V digital input channels with 2.5 kVRMS isolation in a single QSOP-20 package, making it ideal for compact PLC input modules that must meet IEC 61131-2 switch types 1, 2, and 3. The bipolar sinking/sourcing input capability supports both PNP and NPN field sensors with the same BOM, eliminating the need for two board variants. The 200 kV/µs CMTI prevents output glitches from motor-drive transients on adjacent wiring, while the 1 mA typical input current matches IEC 61131-2 type-3 sensor requirements without external current-limit resistors.
Recomendado
Industrial Sensor Interface
Proximity sensors, limit switches, and photoelectric sensors output 24 V digital signals that must be safely isolated from the 3.3 V or 5 V microcontroller domain. The SI8380P-IU's 2500 Vrms barrier and 84 ns propagation delay preserve signal integrity while protecting the MCU from field-side transients. Each channel consumes only 1 mA typical, allowing eight sensors to share one part without thermal stress, and the 2 Mbps data rate supports high-speed encoder feedback or fast-switching sensor arrays in factory automation.
Recomendado
Motor Drive Digital I/O Isolation
Variable-frequency drives (VFDs) and servo amplifiers generate fast dv/dt transients on the field wiring that can corrupt unprotected logic signals. The SI8380P-IU's 200 kV/µs CMTI exceeds typical VFD transient specifications, ensuring clean logic-level outputs to the motion controller. Eight channels in a single QSOP package handle enable, fault, brake, and limit-switch signals from the motor-drive chassis, while the integrated isolation replaces eight discrete optocouplers plus their bias resistors, shrinking PCB area by approximately 70%.
Recomendado
Building Automation Input Card
Building automation systems use 24 V digital inputs for occupancy sensors, door contacts, smoke detectors, and HVAC control signals. The SI8380P-IU's IEC 61131-2 type-1/2/3 compliance ensures reliable detection across the full range of building-automation field devices. The QSOP-20 footprint allows 8 channels to fit on a 25 mm by 25 mm PCB segment, supporting compact BACnet or Modbus input modules installed in ceiling plenums or electrical closets with limited space.
Recomendado
Process Control I/O Module
Process control systems in chemical, oil-and-gas, and water-treatment plants require galvanic isolation between the field instrumentation and the safety-rated controller. The SI8380P-IU provides 2.5 kVRMS reinforced isolation per IEC 60747-17, suitable for SIL-rated process control input cards. Its bipolar input capability accepts both sourcing and sinking 24 V signals from field instruments, while the CMOS LED-emulator technology eliminates the aging and CTR-degradation problems of legacy optocouplers in long-lifecycle process plants.
Recomendado
Renewable Energy Inverter Interface
Solar inverters and battery energy storage systems (BESS) require reliable 24 V digital input isolation for grid-tie status signals, breaker status, and protection relay feedback. The SI8380P-IU's 2500 Vrms isolation handles the high-voltage transients present in inverter power stages, while the 200 kV/µs CMTI ensures logic integrity during IGBT switching events. Eight channels in a single QSOP-20 footprint support multiple grid-status signals in a compact inverter control board, and the no-isolated-VDD requirement simplifies the auxiliary power architecture.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SI8380P-IU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SI8382P-IU | SI8384P-IU | SI8380P-IUR | SI8380IS-IU |
|---|---|---|---|---|---|
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Package | 20-SSOP (QSOP) | 20-SSOP (QSOP) | 20-SSOP (QSOP) | 20-SSOP (QSOP) | 20-SSOP (QSOP) |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Number of Channels | 8 | 8 | 8 | 8 | 8 |
| Data Rate (max) | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| CMTI | 200 kV/µs | 200 kV/µs | 200 kV/µs | 200 kV/µs | 200 kV/µs |
| Propagation Delay | 84 ns | 84 ns | 84 ns | 84 ns | 84 ns |
| IEC 61131-2 Compliance | Type 1, 2, 3 | Type 1, 2, 3 | Type 1, 2, 3 | Type 1, 2, 3 | Type 1, 2, 3 |
Diferenciadores clave
- No isolated-side VDD required - power harvested from input current (frente a SI8382P-IU)
- Bipolar (sinking or sourcing) input capability in one part (frente a SI8384P-IU)
- 200 kV/µs CMTI exceeds IEC 61131-2 industrial transient spec (frente a SI8380P-IUR)
Notas de diseño
Maintain at least 4 mm creepage and clearance under the SI8380P-IU package between the field-side (IN1-IN8) and logic-side (OUT1-OUT8, VDD, GND) copper pour to preserve the 2.5 kVRMS isolation rating per IEC 60747-17. Route the logic-side output traces on the opposite PCB layer from the field-side input traces, with no copper crossing the isolation barrier. Refer to the manufacturer datasheet for the recommended PCB layout pattern in section 'High Voltage Layout Considerations'.
The SI8380P-IU harvests operating current from each input pin via an internal current limiter, so no isolated-side VDD supply is required. Ensure each field-side input provides at least the 1 mA typical operating current by selecting the appropriate input resistor for the 24 V nominal supply. The logic-side VDD pin (pin 19) should be decoupled with a 0.1 µF ceramic capacitor placed within 3 mm of the pin, plus a bulk 1 µF capacitor if the logic rail is shared with multiple high-speed loads.
Do not assume the Si8380P-IU is pin-compatible with Si838x family members without checking the Si838x datasheet family tables. Some variants have inverted logic polarity or different channel counts even though they share the QSOP-20 footprint. For sourcing-only or sinking-only field wiring, verify that the input-side resistor sizing matches the IEC 61131-2 type 1, 2, or 3 specification required by the end application.
Información de cumplimiento
RoHS and REACH compliance per Skyworks product page. Not AEC-Q100 qualified - this part targets industrial PLC applications, not automotive. IEC 61131-2 type 1/2/3 compliance for industrial I/O per manufacturer datasheet. UL 1577 recognition pending verification - check manufacturer datasheet safety section.
