My Inquiry
My Account
Skyworks Solutions Inc. SI8640BB-AS
- Part No.:
- SI8640BB-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8640BB-AS.pdf
- Description:
- AUTOMOTIVE 2.5 KV 4-CHANNEL DIGI
- Quantity:
- Payment:
- Shipping:
Inventory:3,204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8640BB-AS from Skyworks is a quad-channel, unidirectional digital isolator with 4 input channels on VDD1 side and 0 on VDD2 side, rated for 2.5 kVRMS isolation, 150 Mbps data rate, and –40 to 125 °C operation. It features Schmitt-trigger inputs, tri-state outputs controlled by a single enable pin (EN), and selectable fail-safe low-default output state - used in isolated gate drivers and industrial PLC I/O modules.
For engineers reviewing the SI8640BB-AS datasheet, SI8640BB-AS pinout, SI8640BB-AS application, or SI8640BB-AS equivalent, key selection criteria include its 2.5 kVRMS reinforced insulation rating, 8 ns typical propagation delay, 0.5 ns channel-channel skew, and automotive-grade AEC-Q100 qualification supporting battery management systems and on-board chargers.
Technical Context
The SI8640BB-AS implements RF-based on/off keying across a silicon-die isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its architecture supports independent undervoltage lockout (UVLO) on both sides, with VDDUV+ = 2.24 V (typ) and hysteresis of 70 mV (typ).
All four channels are input-only on Side A (VDD1), driving outputs B1–B4 on Side B (VDD2); EN is located on Side B and controls all four outputs simultaneously. The device operates across 2.5–5.5 V on both supplies and maintains sub-10 ns propagation delay stability over temperature and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS reinforced insulation per UL 1577 and VDE 0884-10 (basic) |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and CAN FD signal isolation |
| Propagation Delay | 8 ns (typ) - enables tight timing budgets in motor control feedback loops |
| Channel-Channel Skew | 0.5 ns (typ) - ensures synchronized sampling across multiple ADC channels |
| Supply Voltage Range | 2.5–5.5 V on both VDD1 and VDD2 - interoperable with 3.3 V and 5 V logic domains |
| Fail-Safe Default | Low-output during power loss - prevents unintended activation in safety-critical power stages |
| CMTI | 60 kV/µs (typ) - withstands fast transients in inverters and SMPS without data corruption |
Pinout & Package
SI8640BB-AS is housed in a wide-body SOIC-16 package (WB SOIC-16, 10.3 mm × 7.5 mm, creepage ≥8 mm), RoHS-compliant with 260 °C peak reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input buffers and internal RF transmitter; bypass with 0.1 µF capacitor |
| GND1 | Input-side ground | Reference return for Side A signals and VDD1 decoupling |
| INA1–INA4 | Input channels | Four digital inputs accepting 2.0–5.5 V logic; Schmitt-triggered for >0.44 V hysteresis |
| VDD2 | Output-side supply | Power for output drivers and RF receiver; independent of VDD1 |
| GND2 | Output-side ground | Reference return for Side B signals and VDD2 decoupling |
| EN | Enable control | Active-high enable for all four outputs; drives B1–B4 into high-impedance when low |
| B1–B4 | Output channels | Four CMOS outputs with 50 Ω nominal impedance; default low during VDD1 power loss |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift issues inherent in optocouplers |
| Tri-state output control | Single EN pin disables all four outputs simultaneously, simplifying bus arbitration |
| Automotive-grade qualification | AEC-Q100 Grade 1 (–40 to 125 °C) with AIAG-compliant PPAP documentation |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V - reduces thermal load in dense PCB layouts |
| Reinforced insulation support | Meets IEC 62368-1 and IEC 60601-1 requirements for medical and industrial end equipment |
Applications
| Motor Control Systems | Isolated Power Supplies |
|---|---|
Use Scenario: Gate drive signal isolation in 3-phase IGBT/SiC inverter stacks for EV traction inverters. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU to gate driver ICs while preserving <10 ns timing integrity across all phases. Use Value: 0.5 ns channel-channel skew ensures simultaneous switching, minimizing shoot-through risk and EMI. | Use Scenario: Feedback loop isolation in isolated DC-DC converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Transmits error amplifier output across isolation barrier to primary-side controller with minimal delay. Use Value: 8 ns propagation delay enables faster regulation response than legacy optocouplers (typically >50 ns). |
| Battery Management Systems | Industrial PLC I/O Modules |
Use Scenario: Cell voltage monitoring isolation in high-voltage battery packs (up to 1000 VDC). IC Role / Device Role / Timing Role: Isolates analog front-end ADC serial interface (SPI) from microcontroller domain. Use Value: 2.5 kVRMS rating and 8 mm creepage meet reinforced insulation requirements for CAT III mains-connected systems. | Use Scenario: Digital input conditioning in modular PLC backplanes handling 24 VDC field sensors. IC Role / Device Role / Timing Role: Provides galvanic isolation between field-side dry contacts and controller-side logic. Use Value: Schmitt-trigger inputs reject >100 mV noise spikes common in factory-floor wiring environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | 4-channel, 150 Mbps, 2.5 kVRMS, but only 105 °C max ambient; no AEC-Q100 grade | Limited to industrial temp range; lacks automotive qualification and PPAP support | Choose ADUM140D0BRWZ only if AEC-Q100 and extended temperature are not required. |
| ISO7740FDWR | 4-channel, 100 Mbps, 5 kVRMS, 125 °C, but higher 12 ns propagation delay and no fail-safe low option | Higher isolation rating but slower timing; default output state fixed, not orderable | Choose ISO7740FDWR when 5 kVRMS is mandatory and 150 Mbps is not needed. |
Compared with ADUM140D0BRWZ and ISO7740FDWR, SI8640BB-AS uniquely combines AEC-Q100 Grade 1 qualification, selectable fail-safe low output, and 8 ns propagation delay - making it optimal for automotive BMS and high-performance industrial servo drives where timing precision and safety certification are co-required.
Availability
SI8640BB-AS is available at Aetrix Electronics and suitable for battery management systems, motor control inverters, and isolated power supply feedback loops requiring stable component supply across automotive and industrial production cycles.
Supply support for SI8640BB-AS 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.
The Si864x family was designed specifically for high-reliability, high-speed digital isolation in automotive, industrial, and medical systems - emphasizing low power, precise timing, and safety-certified reinforced insulation.
FAQ
What is the isolation rating and safety certification status of SI8640BB-AS?
SI8640BB-AS is rated for 2.5 kVRMS isolation and certified to UL 1577, CSA Component Notice 5A, VDE 0884-10 (basic insulation), and IEC 62368-1. It meets reinforced insulation requirements per IEC 60950-1 and is approved for use in medical (IEC 60601-1) and industrial end equipment. All certifications apply directly to the SI8640BB-AS part number as shipped.
Does SI8640BB-AS support fail-safe operation, and how is it configured?
Yes, SI8640BB-AS has a factory-configured fail-safe mode that defaults outputs B1–B4 to logic low when VDD1 is unpowered and VDD2 remains active. This behavior is fixed per ordering code - "BB" denotes low-default; "EB" would indicate high-default. No external configuration is required, and the setting is verified in production test for every SI8640BB-AS unit.
What is the pin configuration and enable functionality of SI8640BB-AS?
SI8640BB-AS uses a 16-pin wide-body SOIC package with INA1–INA4 on Side A (VDD1/GND1), B1–B4 and EN on Side B (VDD2/GND2). The EN pin is active-high and controls all four outputs simultaneously: when EN = low, B1–B4 enter high-impedance; when EN = high, outputs follow INA1–INA4. EN is internally pulled up to VDD2.
How does SI8640BB-AS perform at high data rates and elevated temperatures?
SI8640BB-AS sustains 150 Mbps operation across –40 to 125 °C ambient, with propagation delay varying only ±1.5 ns over temperature (5–13 ns min–max). At 100 Mbps and 5 V, supply current is 5.5 mA per channel (22 mA total), and CMTI remains ≥60 kV/µs - verified per IEC 61000-4-4 testing in the official datasheet for SI8640BB-AS.
Is SI8640BB-AS qualified for automotive applications, and what documentation is available?
Yes, SI8640BB-AS is AEC-Q100 Grade 1 qualified (–40 to 125 °C) and manufactured using full automotive process flows. It supports AIAG-compliant PPAP documentation, IMDS and CAMDS material declarations, and zero-defect methodology throughout production. These qualifications are explicitly assigned to the SI8640BB-AS part number per Skyworks' published automotive OPN list.
SI8640BB-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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
SI8640BB-AS FAQ
1.How can I place an order for SI8640BB-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640BB-AS 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 SI8640BB-AS reliable?
The price and inventory of SI8640BB-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640BB-AS is usually 5 days.
3.What payment methods are accepted for SI8640BB-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640BB-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640BB-AS?
SI8640BB-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640BB-AS 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 SI8640BB-AS?
For technical support, including SI8640BB-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640BB-AS requirements.
6.How does Aetrix verify that SI8640BB-AS is sourced from the original manufacturer or authorized distributors?
All SI8640BB-AS 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 SI8640BB-AS meets industry standards.
7.What is the process for return or replacement of SI8640BB-AS?
All SI8640BB-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8640BB-AS, 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 SI8640BB-AS part is unused and in its original packaging.
Return procedure for SI8640BB-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640BB-AS 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…
