My Inquiry
My Account
Skyworks Solutions Inc. SI8641BT-AS2R
- Part No.:
- SI8641BT-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8641BT-AS2R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8641BT-AS2R from Skyworks is a quad-channel, 3-input/1-output digital isolator with reinforced 5 kVRMS isolation (VDE 0884-10), 150 Mbps data rate, <10 ns propagation delay, and selectable fail-safe low-default output state. It operates from 2.5–5.5 V on both sides and supports automotive-grade applications including battery management systems and on-board chargers.
For engineers reviewing the SI8641BT-AS2R datasheet, SI8641BT-AS2R pinout, SI8641BT-AS2R application, or SI8641BT-AS2R equivalent, this page delivers verified electrical specs, package mapping to WB SOIC-16 (IS2), tri-state enable control logic, and AEC-Q100-qualified performance across –40 to 125 °C.
Technical Context
The SI8641BT-AS2R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) on both VDD1 and VDD2 sides, with thresholds of 2.24 V (rising) and 2.16 V (falling).
It features two enable inputs (EN1 on Side A, EN2 on Side B) for independent channel-group control: EN1 governs output A4; EN2 governs outputs B1–B3. Fail-safe default-low behavior activates during input-side power loss while output-side supply remains active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced (VDE 0884-10), 10 kV surge capable - enables use in high-voltage battery systems requiring reinforced insulation per IEC 62368-1 and IEC 60601-1. |
| Data Rate | DC to 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated ADC/DAC timing. |
| Propagation Delay | 5–13 ns (typ. 8 ns) - ensures tight timing alignment in motor control gate drivers and real-time feedback loops. |
| Channel-Channel Skew | 0.4–2.5 ns (typ. 0.5 ns) - maintains phase coherence across isolated signal groups in multi-phase inverters. |
| Supply Voltage Range | 2.5–5.5 V on both VDD1 and VDD2 - interoperates with 3.3 V microcontrollers and 5 V analog subsystems without level shifters. |
| Common-Mode Transient Immunity | 60 kV/µs (min. 35 kV/µs) - sustains reliable operation in noisy power electronics environments with fast-switching SiC/GaN FETs. |
| Fail-Safe Default | Low-output during VDD1 loss - prevents undefined states in safety-critical shutdown sequences for traction inverters. |
Pinout & Package
SI8641BT-AS2R uses a 16-pin wide-body SOIC package (IS2 variant) with 8 mm creepage, RoHS-compliant, and JEDEC-standard 260 °C peak reflow profile. The IS2 design eliminates tie bars while retaining standard WB SOIC-16 land pattern compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies side A (inputs A1–A3, EN1); must be ≥2.5 V for valid operation; UVLO triggers below 2.16 V. |
| GND1 | Input-side ground reference | Return path for VDD1; requires local 0.1 µF bypass capacitor; separates primary-side noise domain. |
| A1–A3 | Digital input channels (Side A) | 3 unidirectional CMOS inputs with Schmitt trigger thresholds (VT+ = 1.67 V, VT– = 1.23 V) for noise rejection. |
| EN1 | Enable control for output A4 | Active-high; when low, forces A4 into high-impedance; internally pulled up to VDD1 - may float or tie to logic level. |
| VDD2 | Output-side power supply | Supplies side B (outputs B1–B3, EN2, A4); independent UVLO monitoring ensures safe output behavior during asymmetrical power loss. |
| GND2 | Output-side ground reference | Return path for VDD2; isolated from GND1; requires separate 0.1 µF bypass capacitor. |
| B1–B3 | Digital output channels (Side B) | 3 unidirectional CMOS outputs; 50 Ω nominal impedance; support 15 pF loads at 150 Mbps with <4 ns rise/fall times. |
| EN2 | Enable control for outputs B1–B3 | Active-high; when low, places B1–B3 in high-impedance; internally pulled up to VDD2 - used for output gating or multiplexing. |
| A4 | Output channel (Side A) | Unidirectional output driven by input A4 logic state; default-low fail-safe behavior applies when VDD1 is unpowered. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; provides stable timing and >60 kV/µs CMTI over full –40 to 125 °C range. |
| Tri-state enable architecture | Independent EN1/EN2 pins allow selective disabling of A4 or B1–B3 groups - enables dynamic power gating and bus arbitration. |
| Selectable fail-safe mode | Factory-configured low-default output ensures defined logic state during VDD1 brownout - critical for ASIL-B system fault responses. |
| Reinforced VDE 0884-10 certification | Validated for 5 kVRMS working voltage and 10 kV surge - meets requirements for reinforced insulation in EV battery packs and OBCs. |
| Ultra-low power at 100 Mbps | 7.3 mA (VDD1) / 14.3 mA (VDD2) typical at 100 Mbps - reduces thermal load in compact automotive modules. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
Use Scenario: Isolating cell voltage monitor signals and pack contactor control lines between high-voltage battery stack and MCU. IC Role / Device Role / Timing Role: SI8641BT-AS2R provides galvanic separation for 3x analog front-end status signals and 1x contactor drive command, with fail-safe low ensuring open-contact state during MCU reset. Use Value: Reinforced 5 kVRMS rating and AEC-Q100 qualification enable direct integration into ISO 26262-compliant BMS hardware without additional safety components. |
Use Scenario: Isolating digital control signals between AC/DC controller and DC/DC stage in bidirectional OBC topologies. IC Role / Device Role / Timing Role: SI8641BT-AS2R isolates 3x PWM enable signals and 1x fault feedback line across the isolation barrier, maintaining <13 ns propagation delay for precise timing coordination. Use Value: 150 Mbps capability supports high-frequency SiC gate driver modulation; 60 kV/µs CMTI prevents false triggering during fast dv/dt switching events. |
| Traction Inverter Control | Industrial Motor Drive |
Use Scenario: Transmitting phase current sense enable, DC-link voltage monitor, and IGBT gate driver enable signals from MCU to high-side driver ICs. IC Role / Device Role / Timing Role: SI8641BT-AS2R routes 3x isolated control signals (A1–A3 → B1–B3) and one dedicated gate driver enable (A4), with EN2 allowing synchronized disable of all three B outputs during fault conditions. Use Value: Channel-channel skew ≤2.5 ns ensures simultaneous gate drive activation across phases; 125 °C ambient rating supports under-hood placement near power modules. |
Use Scenario: Isolating encoder interface, current sense amplifier output, and brake control signals in servo drives operating in factory EMI environments. IC Role / Device Role / Timing Role: SI8641BT-AS2R delivers 3x isolated feedback paths and 1x safety interlock output, with Schmitt-trigger inputs rejecting >100 mV of coupled noise on long encoder cables. Use Value: 2.5–5.5 V dual-supply flexibility allows direct interfacing with 3.3 V FPGAs and 5 V analog sensors; no external level shifters required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2401ARWZ | 2.5 kVRMS basic isolation; 25 Mbps max data rate; no selectable fail-safe mode; 16-pin SOIC wide body. | Limited to industrial automation where 5 kVRMS and 150 Mbps are not required; lacks AEC-Q100 qualification. | Choose ADUM2401ARWZ only if cost sensitivity outweighs need for automotive qualification, reinforced insulation, or high-speed serial links. |
| ISO6741QDWR | 5 kVRMS reinforced isolation; 50 Mbps max data rate; 16-pin SOIC wide body; fails high by default; TI's CMTI = 85 kV/µs. | Suitable for lower-bandwidth BMS communication but cannot support 150 Mbps SPI or fast PWM enable signaling. | Prefer ISO6741QDWR when ultra-high CMTI is prioritized over data rate, and fail-high default aligns with system architecture. |
Compared with ADUM2401ARWZ and ISO6741QDWR, SI8641BT-AS2R uniquely combines AEC-Q100 qualification, VDE-reinforced 5 kVRMS, 150 Mbps speed, and factory-configurable fail-low behavior - making it the only option qualified for high-speed, safety-critical automotive power conversion stages.
Availability
SI8641BT-AS2R is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, traction inverters, and industrial motor drives requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8641BT-AS2R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
The Si864x family was designed specifically for high-reliability, high-speed digital isolation in automotive electrification and industrial power systems - emphasizing AEC-Q100 compliance, reinforced safety certification, and sub-10 ns timing precision.
FAQ
What is the isolation rating and safety certification status of SI8641BT-AS2R?
SI8641BT-AS2R provides 5 kVRMS reinforced isolation certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1. It meets IEC 62368-1 and IEC 60601-1 requirements for reinforced insulation and is rated for 10 kV surge. This certification is validated for the WB SOIC-16 IS2 package variant used in SI8641BT-AS2R.
Does SI8641BT-AS2R support fail-safe operation, and how is it configured?
Yes, SI8641BT-AS2R has factory-configured fail-safe behavior: outputs default to logic low when VDD1 is unpowered but VDD2 remains active. This is fixed at manufacturing (not user-programmable) and applies to all four channels. The "T" in the part number denotes the reinforced 5 kVRMS version with this low-default mode.
What are the enable pin functions for SI8641BT-AS2R, and how do they operate?
SI8641BT-AS2R has two enable inputs: EN1 controls output A4; EN2 controls outputs B1–B3. Both are active-high, internally pulled up to their respective supplies (VDD1 for EN1, VDD2 for EN2), and drive associated outputs into high-impedance when low. EN1 and EN2 may be left floating, tied to VDD, or driven externally - no external pull-up required.
What is the maximum data rate and propagation delay specification for SI8641BT-AS2R?
SI8641BT-AS2R supports up to 150 Mbps data rate with a typical propagation delay of 8 ns and a maximum of 13 ns over –40 to 125 °C. Minimum pulse width is 5 ns. These values are guaranteed across the full operating voltage range (2.5–5.5 V) and apply to all four channels simultaneously.
Is SI8641BT-AS2R qualified for automotive applications, and what does the "A" suffix indicate?
Yes, SI8641BT-AS2R is AEC-Q100 qualified (Grade 1, –40 to 125 °C). The "A" in the suffix confirms automotive-grade manufacturing - full automotive process flows, AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect methodology throughout design and production. The "R" denotes tape-and-reel packaging.
SI8641BT-AS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8641BT-AS2R FAQ
1.How can I place an order for SI8641BT-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8641BT-AS2R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI8641BT-AS2R reliable?
The price and inventory of SI8641BT-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8641BT-AS2R is usually 5 days.
3.What payment methods are accepted for SI8641BT-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8641BT-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8641BT-AS2R?
SI8641BT-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8641BT-AS2R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI8641BT-AS2R?
For technical support, including SI8641BT-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8641BT-AS2R requirements.
6.How does Aetrix verify that SI8641BT-AS2R is sourced from the original manufacturer or authorized distributors?
All SI8641BT-AS2R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8641BT-AS2R meets industry standards.
7.What is the process for return or replacement of SI8641BT-AS2R?
All SI8641BT-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8641BT-AS2R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI8641BT-AS2R part is unused and in its original packaging.
Return procedure for SI8641BT-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8641BT-AS2R Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
