SI8602AD-B-ISR - 5kVrms I2C Isolator 2CH | Skyworks
MPN: SI8602AD-B-ISR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.15 | $3.15 |
| 10 | $2.83 | $28.30 |
| 100 | $2.52 | $252.00 |
| 500 | $2.26 | $1,130.00 |
| 1,000 | $1.98 | $1,980.00 |
SI8602AD-B-ISR Overview
A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier while blocking high voltages and ground potential differences between two circuit domains. Within the signal-chain hierarchy, digital isolators sit alongside optocouplers as galvanic isolation elements, but unlike optocouplers they are CMOS devices built on capacitive coupling technology, delivering shorter propagation delays, lower power consumption, smaller installed size, and more stable operation over temperature and age.
Key features include 5000 Vrms withstand isolation, open-drain outputs with 35 mA sink current that natively support I2C wired-AND buses, and independent bidirectional SDA and unidirectional SCL isolation channels. The 35 kV/us CMTI rating keeps the isolation barrier intact in the presence of fast-switching ground bounce, which is essential in motor-drive and power-converter environments. Supply operation spans 2.5 V to 5.5 V on both sides, allowing 3.3 V to 5 V level-independent connection.
The device is based on Silicon Labs proprietary RF isolation technology, now manufactured and sold by Skyworks Solutions. The capacitor-based isolation barrier avoids the LED aging mechanisms inherent to optocouplers, so propagation delay and CMTI remain stable over lifetime. The -40C to +125C operating range and AEC-Q100 qualification support automotive-grade deployments.
Typical applications include isolated I2C bus segments in automotive battery management systems, industrial PMBus power supplies, and isolation of I2C peripherals in motor drives and renewable-energy inverters. The open-drain architecture means the isolator can sit directly in an I2C bus line without direction-control logic, simplifying multi-master designs.
A key design consideration is pull-up resistor sizing: because the 35 mA open-drain sink governs bus fall times, choose pull-ups that keep rise time within I2C specification at the intended bus speed and bus capacitance.
This page synthesizes distributor pricing, drop-in alternatives within the Si86xx family, and practical I2C design notes not found in the manufacturer datasheet.
Drop-in alternatives for SI8602AD-B-ISR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SI8602AC-B-ISR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8602AB-B-ISR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8602BD-B-ISR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8602AD-B-IS
✅ Drop-In📋 Reference alternative (not in catalog)
SI8602AD-B-IS1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8605AD-B-ISR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8602AD-B-ISR Maximum Ratings & Electrical Characteristics
| Isolation Type | I2C digital isolator |
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 |
| Channel Configuration | Bidirectional SDA, unidirectional SCL |
| Data Rate | 1.7 Mb/s |
| CMTI | 35 kV/us |
| Technology | Capacitive coupling (CMOS) |
| Supply Voltage Range | 2.5 V to 5.5 V (both sides) |
| Minimum Supply Voltage | 2.5 V |
| Maximum Supply Voltage | 5.5 V |
| Output Type | Open drain, 35 mA sink current |
| Operating Temperature Range | -40C to +125C |
| Package | 16-SOIC (0.295 inch, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 automotive |
| Packaging | Reel (Tape & Reel) |
| Series | Automotive |
SI8602AD-B-ISR 16-soic (0.295 inch, 7.50 mm width) Pin Configuration Guide
Pin configuration for SI8602AD-B-ISR (16-soic (0.295 inch, 7.50 mm width) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for SI8602AD-B-ISR.
Refer to the datasheet for full pin configuration.
Typical Applications
SI8602AD-B-ISR is suitable for 6 applications: Automotive Battery Management Systems, Isolated PMBus Power Supplies, Industrial Motor Drives, Solar Inverters and Renewable Energy, Medical Patient-Connected Equipment, Industrial Sensor Networks and IoT Gateways.
Automotive Battery Management Systems
In automotive BMS architectures, the cell-monitoring and pack-management domains must be galvanically isolated from the vehicle CAN/LIN domain. The SI8602AD-B-ISR fits because its 5000 Vrms barrier exceeds typical 12 V-to-high-voltage-bus creepage needs, its 35 kV/us CMTI survives inverter switching transients, and its AEC-Q100 qualification plus -40C to +125C range meets automotive module ambient requirements. The isolator is inserted directly in the I2C/PMBus lines between the pack MCU and battery-monitor AFEs. Because the SDA side uses open-drain bidirectional channels with 35 mA sink, no external direction-control logic is needed. Performance consideration: keep each isolated bus segment capacitance low and select pull-ups for the 400 kHz fast-mode rise-time budget, since the isolator adds tens of ns of propagation delay on top of the I2C timing margin.
Recommended
Isolated PMBus Power Supplies
Server and telecom power supplies isolate the PMBus management interface between the controller ground and the low-voltage system ground. The SI8602AD-B-ISR suits this role because its 2.5 V to 5.5 V per-side supply range matches both 3.3 V PMBus masters and 5 V hot-swap controllers without level shifting, and its 1.7 Mb/s rate covers 100-400 kHz PMBus with comfortable timing margin. The isolator is placed in series on SDA (bidirectional) and SCL (master-driven, so unidirectional SCL isolation is exactly matched to the protocol), reducing component count versus dual-channel generic isolators plus direction logic. Performance consideration: the open-drain 35 mA sink allows low-value pull-ups to speed up edges on heavily loaded PMBus backplanes; verify total propagation delay stays within the PMBus tHD;DAT timing window.
Recommended
Industrial Motor Drives
Motor-drive systems isolate low-voltage controller electronics from power-stage ground domains where dv/dt from PWM switching reaches tens of kV/us. The SI8602AD-B-ISR's 35 kV/us common-mode transient immunity is the deciding parameter here: it keeps the isolation barrier logic intact during IGBT or SiC switching events that would corrupt slower optocouplers. The capacitive-coupling CMOS architecture also avoids optocoupler LED aging, so CMTI and delay remain stable over the drive's service life. The device is used to pass I2C-connected sensors, EEPROM configuration, or gate-monitor data across the barrier. Performance consideration: position the isolator close to the connector or shunt region, route a low-impedance chassis ground around the barrier to steer displacement currents, and keep side-A/side-B ground pours separated per the datasheet layout guidance.
Recommended
Solar Inverters and Renewable Energy
Grid-tied solar inverters isolate the MPPT controller domain from the grid-monitoring and communication domain, with isolation voltages of several kVrms mandated by safety standards. The SI8602AD-B-ISR provides 5000 Vrms withstand, so it covers typical string-inverter I2C isolation needs between the panel-MPPT MCU and metering/monitoring AFEs. Its 1.7 Mb/s data rate easily handles 100-400 kHz I2C traffic to energy-metering ICs, and the -40C to +125C range covers outdoor NEMA enclosure environments. Using an I2C-specific isolator means SDA bidirectionality is native and SCL unidirectionality matches protocol direction, so no GPIO-based direction pins are required. Performance consideration: inverters impose continuous high dv/dt; confirm the system-level creepage and clearance of the 16-SOIC 7.50 mm package against the applicable safety standard for the final insulation coordination.
Recommended
Medical Patient-Connected Equipment
Patient-connected diagnostic equipment requires galvanic isolation between applied-part front ends and the mains-powered processing domain. The SI8602AD-B-ISR's 5000 Vrms isolation supports defibrillator-proof design targets when used within a certified isolation scheme, and its CMOS capacitive barrier provides deterministic propagation delay, valuable for sampled biosignal timing chains. The device is inserted in the I2C lines between the analog front-end ADCs and the host MCU, carrying configuration writes and conversion reads at 400 kHz. The 2.5 V to 5.5 V supply flexibility lets low-power AFE rails on the patient side interface a 3.3 V host. Performance consideration: total channel delay must be added to the I2C read timing of slow biosignal ADCs; the 35 mA open-drain sink allows pull-ups low enough to keep edges sharp on shielded cable-connected bus segments.
Recommended
Industrial Sensor Networks and IoT Gateways
Factory sensor nodes often sit on electrically noisy grounds separated from the gateway controller. The SI8602AD-B-ISR isolates the I2C bus between remote sensor clusters and the gateway, with 5 kVrms barrier and 35 kV/us CMTI handling ground-potential differences caused by large motor loads. Its quiescent-light CMOS design suits always-on monitoring nodes better than optocoupler alternatives that waste LED current continuously. The bidirectional SDA channel supports multi-slave sensor clusters (EEPROM, temperature sensors, humidity sensors) behind the barrier, while unidirectional SCL matches the gateway-master clock direction. Performance consideration: long sensor cables add capacitance; the 35 mA sink current gives freedom to use lower pull-up values to meet fast-mode rise times, but verify per-side bus capacitance does not exceed the I2C 400 pF limit, adding an I2C buffer if needed.
Recommended
Recommended Products Summary
Engineering reference data for SI8602AD-B-ISR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI8602AC-B-ISR | SI8602BD-B-ISR | SI8602AD-B-IS | SI8605AD-B-ISR |
|---|---|---|---|---|---|
| Package | 16-SOIC (7.50 mm) | 16-SOIC (7.50 mm) - same | 16-SOIC (7.50 mm) - same | 16-SOIC (7.50 mm) - same | 16-SOIC (7.50 mm) - same |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Isolation Voltage | 5000 Vrms | 3000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| CMTI | 35 kV/us | 35 kV/us | 35 kV/us | 35 kV/us | 35 kV/us |
| Channel Configuration | SDA bidirectional + SCL unidirectional | SDA bidir + SCL unidir - same | SDA bidir + SCL unidir - same | SDA bidir + SCL unidir - same | Both channels unidirectional - differs |
| Supply Voltage Range | 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 |
| AEC-Q100 Qualification | Yes | Yes (ISR suffix) | Yes (ISR suffix) | Same die (verify grade suffix) | Yes (ISR suffix) |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Non-reel (tube/tray) | Tape & Reel |
Key Differentiators
- 5000 Vrms isolation rating (vs SI8602AC-B-ISR)
- Bidirectional SDA without direction logic (vs SI8605AD-B-ISR)
- Tape & Reel production packaging (vs SI8602AD-B-IS)
Design Notes
The SI8602's open-drain outputs (35 mA sink) require pull-up resistors on both sides of the barrier. Size pull-ups per I2C rise-time rules: for fast-mode 400 kHz the rise time must stay under 300 ns, so with total side capacitance C_bus, use R_pu <= 300 ns / (0.8473 * C_bus). The 35 mA sink allows pull-ups far lower than standard 3 mA-sink devices, enabling sharp edges on capacitive backplanes, but confirm bus current stays within sink capability at logic low.
Maintain a physical gap under the isolation barrier: keep the side-A and side-B ground pours separated by the creepage/clearance distance defined for 5 kVrms in your safety standard, with no copper, trace, or via crossing the barrier region except the isolator itself. Place 0.1 uF decoupling capacitors directly at VDDA/GNDA and VDDB/GNDB pins. Follow the Si86xx datasheet layout guidance for barrier-region board spacing.
Do not assume the SI8602 (bidirectional SDA + unidirectional SCL) can replace the SI8600 (both bidirectional) in multi-master or clock-stretching-heavy designs - SCL unidirectionality blocks slave clock stretching and multi-master arbitration on SCL. Confirm your I2C topology before selecting the family variant. Also, this 16-SOIC is NOT footprint-compatible with the 8-pin Si8600 package; package selection is a layout-time decision.
Compliance Information
AEC-Q100 qualification and Automotive series membership confirmed from distributor data (datasheet directory listing). RoHS/REACH/lead-free status not explicitly stated in the retrieved verified data - confirm from official Skyworks product page before order release.
