SI8710AD-B-IS - 5kV Digital Isolator, 15Mbps, SDIP-6 | Skyworks
MPN: SI8710AD-B-IS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.12 | $1,060.00 |
| 1,000 | $1.89 | $1,890.00 |
SI8710AD-B-IS Overview
A digital isolator is a semiconductor device that transfers logic signals across a galvanic isolation barrier using high-voltage capacitors or RF/transformer coupling rather than an optocoupler's LED + photodiode path. Compared to optocouplers, CMOS-based digital isolators offer higher speed, tighter timing, lower power, and significantly better aging and temperature behavior. Digital isolators sit within the interface IC category of mixed-signal semiconductors and are the modern building block for safe signal transfer across high-voltage domains in industrial, automotive, and renewable-energy systems.
The SI8710AD-B-IS integrates Skyworks' proprietary CMOS isolation technology in a wide-body SDIP-6 footprint, achieving 5000 Vrms reinforced isolation per VDE 0884-10 / UL 1577. The LED-emulator input eliminates the current-transfer-ratio (CTR) degradation that plagues optocouplers over time, while the open-collector output supports legacy 3.3 V to 30 V logic rails and bus-side pull-ups up to 30 V, simplifying system retrofits where the user is migrating away from a 6-pin DIP optocoupler.
The Si87xx family is qualified to AEC-Q100 for automotive designs, supports up to 15 Mbps NRZ signaling, and delivers typical propagation delay of 60 ns with channel-to-channel matching suited to high-speed GPIO, SPI isolation, and serial communications lines. Because it is pin-compatible with industry-standard 6-pin DIP optocouplers, the SI8710AD-B-IS is often used as a modernization upgrade that improves speed, power, and reliability simultaneously.
Typical applications include isolated GPIO interfaces, industrial fieldbus isolation (RS-232/RS-485, CAN, SPI), PLC I/O modules, solar inverter gate drivers, motor-control feedback paths, and battery-management system (BMS) communications. Designers also use it as a drop-in optocoupler replacement in SMPS feedback loops and digital input modules where 5 kV isolation is required.
When replacing an optocoupler, verify the LED-emulator input current range matches the legacy LED forward current and confirm the open-collector output's rated voltage supports the new bus voltage. The wide-body SDIP-6 footprint matches standard 6-pin DIP optocoupler PCB land patterns, but creepage and clearance at the system level must still be reviewed for end-equipment safety certification.
This page synthesizes distributor pricing, drop-in alternatives from the Si87xx family, and practical design guidance not found in the manufacturer datasheet alone.
Drop-in alternatives for SI8710AD-B-IS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SI8710AD-B-IS (same form factor and footprint) — differing in Common-Mode Transient Immunity (CMTI), Package, Data Rate, Output Type, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SI8710AD-B-ISR
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →SI8711AD-B-IS
✅ Drop-In📋 Reference alternative (not in catalog)
SI8710AC-B-IS
✅ Drop-In✓ In Stock
$1.71 / Unit
View Datasheet →SI8710AD-IS
✅ Drop-In📋 Reference alternative (not in catalog)
ACPL-W60L-000E
✅ Drop-In📋 Reference alternative (not in catalog)
TLP2766A(TP,E
✅ Drop-In📋 Reference alternative (not in catalog)
SI8710AD-B-IS Specifications
| Manufacturer | Skyworks Solutions Inc. |
| Part Series | Si87xx |
| Function | Digital Isolator, Single-Channel |
| Isolation Voltage (rms) | 5000 Vrms |
| Number of Channels | 1 |
| Data Rate | Up to 15 Mbps |
| Propagation Delay (typ) | 60 ns |
| Common-Mode Transient Immunity (CMTI) | 20 kV/µs (min) |
| Input Type | LED Emulator (current-driven input) |
| Output Type | Open Collector |
| Supply Voltage (VDD / VBUS) | 3 V to 30 V |
| Package | SDIP-6 (6-SOIC, 0.295" / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C |
| Automotive Qualification | AEC-Q100 (per family) |
| Safety Standards | UL 1577, VDE 0884-10 |
| RoHS Status | Compliant |
SI8710AD-B-IS Pin Configuration
| Pin 1 | VDD1 — Input-side supply (LED emulator bias) |
| Pin 2 | IN+ — LED emulator anode (forward current input) |
| Pin 3 | IN- — LED emulator cathode (ground return for input current) |
| Pin 4 | GND1 — Input-side ground reference |
| Pin 5 | OUT — Open-collector output (pull-up to VBUS externally) |
| Pin 6 | VBUS — Output-side supply rail (3 V to 30 V) |
Typical Applications
SI8710AD-B-IS is suitable for 7 applications: Industrial PLC Digital Input Module, Isolated SPI Interface for Motor Control, Solar Inverter Gate-Driver Isolation, Battery Management System (BMS) Communications, SMPS Feedback Loop Isolation, Isolated RS-232 / RS-485 Transceiver Interface, Medical Equipment Patient Isolation.
Industrial PLC Digital Input Module
The SI8710AD-B-IS is a strong fit for industrial PLC digital input modules that interface 24 V field signals to a 3.3 V or 5 V controller across an isolation barrier. Its 5 kVrms isolation, 20 kV/µs CMTI, and open-collector output rated up to 30 V allow direct connection to 24 V field wiring with a single pull-up resistor. The Si87xx datasheet IEC 61131-2 type-1/type-3 input compatibility makes it a drop-in replacement for legacy 6-pin DIP optocouplers that have aged out of CTR specification on long-running production lines.
Recommended
Isolated SPI Interface for Motor Control
Motor-control designs frequently require galvanic isolation between a low-voltage MCU and gate-driver or feedback circuitry referenced to a high-voltage bus. The SI8710AD-B-IS supports SPI signaling up to 15 Mbps with 60 ns typical propagation delay, fast enough to keep the control loop stable. The 20 kV/µs CMTI prevents logic errors during IGBT switching transients. The SDIP-6 wide-body footprint preserves creepage and clearance required by IEC 61800-5-1, while the open-collector output lets the designer pull up to a 15 V or 24 V gate-driver logic rail.
Recommended
Solar Inverter Gate-Driver Isolation
In string-inverter designs, gate-drive signals for the high-side IGBT/MOSFET must cross a 600 V to 1500 V DC bus with reinforced isolation. The SI8710AD-B-IS provides 5 kVrms isolation in a wide-body SDIP-6 package that fits standard optocoupler PCB land patterns, simplifying retrofits. The 20 kV/µs CMTI ensures robust operation during the fast dV/dt transitions of a 50 kHz to 100 kHz inverter stage. The 3 V to 30 V open-collector output supports gate-driver bias rails from 12 V to 24 V without level shifters.
Recommended
Battery Management System (BMS) Communications
Lithium-ion BMS architectures isolate each cell-monitoring IC from the pack controller to break ground loops and protect the low-voltage logic from high-voltage pack transients. The SI8710AD-B-IS isolates daisy-chain UART, isoSPI, or SPI traffic at up to 15 Mbps, matching the bandwidth of common cell-monitor devices. The AEC-Q100 qualification of the Si87xx family supports automotive traction-battery designs. The wide-body SDIP-6 footprint delivers 8 mm of creepage, sufficient for 400 V and 800 V EV battery packs per ISO 6469-3.
Recommended
SMPS Feedback Loop Isolation
Switched-mode power supplies with primary-side regulation often require an isolated error-amplifier feedback path to comply with safety standards. The SI8710AD-B-IS can replace the legacy optocoupler in TL431-style feedback loops, delivering the 5 kVrms isolation and 15 Mbps bandwidth needed to support high-frequency primary-side controllers. Because the LED-emulator input does not age like a real LED, the SMPS output voltage remains stable across the product lifetime, eliminating field returns due to optocoupler CTR drift.
Recommended
Isolated RS-232 / RS-485 Transceiver Interface
Industrial serial links frequently require isolation to break ground loops between nodes on long cable runs. The SI8710AD-B-IS isolates the UART lines of an RS-232 or RS-485 transceiver from the host MCU at 5 kVrms. The 15 Mbps data rate supports both RS-232 (115.2 kbps typical) and high-speed RS-485 (up to 10 Mbps). The wide-body SDIP-6 footprint matches the standard 6-pin DIP optocoupler pads in legacy interface modules, enabling direct upgrades without PCB rework.
Recommended
Medical Equipment Patient Isolation
Patient-monitoring equipment such as ECG, infusion pumps, and blood-pressure modules require reinforced isolation between the patient-connected circuitry and the mains-referenced host. The SI8710AD-B-IS provides 5 kVrms isolation in a wide-body SDIP-6 package that meets IEC 60601-1 creepage requirements. The 15 Mbps bandwidth preserves signal integrity for high-resolution digital SpO2 and ECG front-ends. The CMOS isolation channel eliminates the aging concerns of optocouplers, supporting long-life medical device certifications.
Recommended
Recommended Products Summary
Engineering reference data for SI8710AD-B-IS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI8710AD-B-ISR | SI8711AD-B-IS | SI8710AC-B-IS | SI8710AD-IS | ACPL-W60L-000E | TLP2766A(TP,E |
|---|---|---|---|---|---|---|---|
| Package | SDIP-6 (0.295", 7.50 mm) | SDIP-6 (0.295", 7.50 mm) - same | SDIP-6 (0.295", 7.50 mm) - same | SDIP-6 (0.295", 7.50 mm) - same | SDIP-6 (0.295", 7.50 mm) - same | SDIP-6 (stretched SO-6) - same footprint | SDIP-6 - same |
| Brand | Skyworks | Skyworks | Skyworks | Skyworks | Skyworks | Broadcom | Toshiba |
| Isolation Voltage (rms) | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate (max) | 15 Mbps | 15 Mbps | 15 Mbps | 15 Mbps | 15 Mbps | 10 Mbps | 10 Mbps |
| CMTI (min) | 20 kV/µs | 20 kV/µs | 20 kV/µs | 20 kV/µs | 20 kV/µs | 15 kV/µs | 20 kV/µs |
| Output Type | Open Collector | Open Collector | Open Collector | CMOS Push-Pull | Open Collector | Open Collector | Open Collector |
| Output Voltage (max) | 30 V | 30 V | 30 V | 5 V (VDD-limited) | 30 V | 6 V | 30 V |
| Propagation Delay (typ) | 60 ns | 60 ns | 60 ns | 60 ns | 60 ns | 100 ns | 80 ns |
| Automotive Grade | AEC-Q100 (family) | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Pricing (1k qty, USD, as of 2026-10-10) | $1.89 | $1.89 | $1.95 | $1.95 | $1.85 | $2.10 | $1.99 |
Key Differentiators
- 15 Mbps data rate vs 10 Mbps for cross-brand optocouplers (vs ACPL-W60L-000E)
- 30 V open-collector output vs 5 V CMOS push-pull (vs SI8710AC-B-IS)
- CMOS LED-emulator input eliminates CTR aging (vs PS2801A-1-A (legacy optocoupler))
Design Notes
The SDIP-6 wide-body package provides 8 mm of creepage, which is sufficient for reinforced isolation per IEC 60747-5-2 and VDE 0884-10. Do not place any PCB traces, vias, or solder pads under the isolation barrier (between pins 1-3 and pins 4-6) - this would reduce the effective creepage. Keep the input-side and output-side ground planes separated; tie them only at the PCB edge connector or a single-point ground near the connector to maintain the isolation barrier.
Drive the LED-emulator input with a stable forward current between the IF(on) minimum (typically 3 mA) and the absolute maximum (typically 50 mA) per the Si87xx datasheet. A series resistor between the driving logic and the LED emulator input is required: at 5 V VDD1, a 1 kOhm resistor sets approximately 5 mA. Add a 0.1 uF bypass capacitor directly across VDD1 and GND1 (and again across VBUS and GND2) to filter high-frequency noise that could couple across the isolation barrier.
Do not exceed the 30 V open-collector output rating; the SI8710AD-B-IS output is rated for pull-up voltages up to 30 V. Designers migrating from 5 V optocoupler circuits must verify that any new pull-up rail does not exceed this rating. The open-collector structure means rise time is determined by the external pull-up resistor and the load capacitance - use 4.7 kOhm or smaller for high-speed signals above 1 Mbps to keep the rise time under 20 ns.
Estimated: at 25 C ambient, the SI8710AD-B-IS dissipates approximately 50 mW typical (input-side LED emulator + output-side bias). The wide-body SDIP-6 package has a theta_JA of approximately 100 C/W, yielding a junction temperature rise of 5 C above ambient - well within the -40 C to +125 C operating range. No external heatsink is required for normal operation, but designers should still provide adequate copper pour on both VDD1 and VBUS pins to spread heat away from the package body.
Compliance Information
AEC-Q100 qualification per the Si87xx family datasheet. UL 1577 and VDE 0884-10 reinforced isolation certifications referenced in the datasheet. RoHS and REACH compliance per the Skyworks product page.
