SI8631EC-B-IS1 Silicon Labs Integrated Circuit (Small Outline Packages) In Stock
Silicon Labs SI8631EC-B-IS1 is a 3-channel digital isolator rated at 3.75 kV RMS isolation with 2 forward and 1 reverse channels in a small-outline SOIC package. It operates at data rates up to 150 Mbps and supports 2.5 V to 5.5 V supply voltage. Available from stock with worldwide shipping.
- Manufacturer
- Silicon Labs
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SI8631EC-B-IS1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.5100(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SI8631EC-B-IS1?
- 3.75 kV RMS galvanic isolation with 2 forward and 1 reverse channels enabling bidirectional communication across isolated power domains
- Up to 150 Mbps data rate per channel supporting high-speed SPI, CAN, and RS-485 interface isolation in industrial systems
- 2.5 V to 5.5 V wide supply voltage range enabling direct interfacing between 3.3 V microcontrollers and 5 V industrial logic without level translators
What is SI8631EC-B-IS1 used for?
The SI8631EC-B-IS1 is designed for galvanic isolation of SPI, UART, and general-purpose digital interfaces in industrial automation, motor drive controllers, and grid-tied inverters where high-voltage transients must be blocked from control-side electronics. Its 3.75 kV RMS isolation rating meets IEC 60747-17 safety requirements for reinforced insulation in medical and industrial equipment. The bidirectional channel topology with 2 forward and 1 reverse paths suits MISO/MOSI/CLK SPI bus isolation in a single-chip solution.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SI8631EC-B-IS1 datasheet?
SI8631EC-B-IS1 Datasheet DownloadOfficial datasheet from Silicon Labs
What are equivalent replacements for SI8631EC-B-IS1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What isolation voltage does the SI8631EC-B-IS1 provide and which safety standards does it meet?
The SI8631EC-B-IS1 is rated at 3.75 kV RMS continuous working isolation, meeting IEC 60747-17 and UL 1577 requirements for basic or reinforced insulation in industrial and medical applications. This isolation level protects microcontrollers and DSPs from high-voltage transients of 5 kV or more that may appear on motor drive power buses during switching events.
How does the 2-forward-1-reverse channel configuration of the SI8631EC-B-IS1 map to common serial interfaces?
The 2 forward and 1 reverse channel layout directly maps to a 3-wire SPI bus: 2 forward channels carry SPI clock and MOSI signals from master to slave, and 1 reverse channel carries MISO data back to the master. This lets a single SI8631EC-B-IS1 isolate an entire SPI link at up to 150 Mbps without requiring a second isolator device for the return path.
What supply voltage range does the SI8631EC-B-IS1 support and how does this simplify mixed-voltage designs?
The SI8631EC-B-IS1 accepts 2.5 V to 5.5 V on both the input-side and output-side supply pins independently. This allows direct connection between a 3.3 V microcontroller on the primary side and a 5 V industrial fieldbus transceiver on the secondary side without external voltage translators, reducing the component count by 2 to 4 discrete level-shifter ICs in a typical design.
At what maximum data rate does the SI8631EC-B-IS1 operate and what propagation delay should designers plan for?
The SI8631EC-B-IS1 supports up to 150 Mbps per channel with a typical propagation delay of approximately 10 ns, which is far below the timing margins of SPI at 10 MHz or CAN at 1 Mbps. This low latency allows the isolator to be inserted into existing interface timing budgets without reclocking or extending SPI transaction windows, even in designs with tight 50 ns cycle constraints.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.3100 | $4.31 |
| 3+ | $3.8100 | $11.43 |
| 10+ | $3.4200 | $34.20 |
| 19+ | $1.9100 | $36.29 |
| 288+ | $1.8420 | $530.50 |
| 500+ | $1.5100 | $755.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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