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Texas Instruments ISO7240CFQDWRQ1
- Part No.:
- ISO7240CFQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7240CFQDWRQ1.pdf
- Description:
- DGTL ISO 4000VPK 4CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
ISO7240CFQDWRQ1 from Texas Instruments is a quad-channel, unidirectional digital isolator with silicon-dioxide isolation barrier, TTL input thresholds, input noise filter, and selectable failsafe output via CTRL pin. It supports 25Mbps signaling, ≤1ns channel-to-channel output skew, ≤2ns pulse-width distortion, and operates from 3.3V or 5V supplies across –40°C to +125°C for automotive factory automation interfaces.
For engineers reviewing the ISO7240CFQDWRQ1 datasheet, ISO7240CFQDWRQ1 pinout, ISO7240CFQDWRQ1 application, or ISO7240CFQDWRQ1 equivalent, key selection criteria include failsafe output control logic, input disable function, 4kV ESD rating, VDE/UL/IEC safety certifications, and compatibility with Modbus/Profibus isolated data buses in high-noise industrial environments.
Technical Context
The ISO7240CFQDWRQ1 implements four identical unidirectional channels with independent input-side (VCC1/GND1) and output-side (VCC2/GND2) power domains. Its SiO₂ isolation barrier provides reinforced insulation rated to 2500 VRMS per UL 1577 and 560 VPK per VDE 0884-17, with CMTI ≥25 kV/μs and >10¹² Ω isolation resistance at 25°C.
It features a dedicated DISABLE pin (Pin 7) that blocks all input signals across the barrier, and a CTRL pin (Pin 10) that sets output state (high or low) during input disable or VCC1 power-down-enabling deterministic failsafe behavior critical for functional safety in automotive and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 25 Mbps maximum - supports high-speed serial bus protocols including Modbus RTU and Profibus DP without timing violation. |
| Channel-to-Channel Output Skew | ≤1 ns maximum - ensures synchronized edge alignment across all four outputs for time-critical sampling or parallel data transfer. |
| Pulse-Width Distortion | ≤2 ns maximum - preserves duty cycle integrity of clock or PWM signals crossing isolation boundary. |
| Common-Mode Transient Immunity | ≥25 kV/μs - maintains signal integrity in presence of fast-switching noise from motor drives or power converters. |
| Isolation Withstand Voltage | 2500 VRMS (60 s) - certified per UL 1577 for reinforced insulation in automotive and industrial safety-critical applications. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and factory-floor deployment without derating. |
| Supply Voltage Range | 3.15 V to 5.5 V on either side - enables mixed-voltage system interfacing (e.g., 3.3V MCU to 5V PLC I/O). |
Pinout & Package
ISO7240CFQDWRQ1 uses a 16-pin SOIC (DW) package with 10.30 mm × 7.50 mm body size and 10.30 mm × 10.30 mm overall footprint, optimized for automated assembly and thermal performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, GND1 (Pins 1, 2, 8) | Input-side power domain | Supplies logic buffers on input side; dual GND1 pins reduce ground impedance and improve noise rejection. |
| VCC2, GND2 (Pins 16, 9, 15) | Output-side power domain | Supplies output drivers independently; dual GNDO pins support clean return paths for isolated peripherals. |
| INA–IND (Pins 3–6) | Unidirectional input channels A–D | TTL-compatible inputs with 150 mV hysteresis and 5V tolerance - accept logic from legacy 5V controllers without level shifters. |
| OUTA–OUTD (Pins 11–14) | Unidirectional output channels D–A | CMOS outputs drive 4 mA high/low - interface directly with 3.3V or 5V receivers across isolation barrier. |
| DISABLE (Pin 7) | Input disable control | Active-high assertion forces all outputs into failsafe state determined by CTRL pin - enables safe shutdown during fault conditions. |
| CTRL (Pin 10) | Failsafe output selector | Open/high = logic-high failsafe; low = logic-low failsafe - defines deterministic output state when input side is powered down or disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable failsafe output | CTRL pin configures output state (high/low) during input disable or VCC1 loss - eliminates undefined states in safety-critical power-loss scenarios. |
| Input noise filter | Integrated filter rejects transients <40 ns - prevents false triggering from EFT bursts or switching noise in industrial environments. |
| 25-year life at rated voltage | Insulation lifetime modeled per IEC 60664-1 using VIORM = 560 VPK - validated for long-term reliability in automotive ECUs and PLC modules. |
| 4 kV ESD protection | HBM rating per ANSI/ESDA/JEDEC JS-001 - withstands handling and board-level ESD events without latch-up or parametric shift. |
| Reinforced safety certification | DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1 - meets ASIL-B functional safety requirements for automotive and industrial equipment. |
Applications
| Factory Automation Interface | Servo Motor Control |
|---|---|
Use Scenario: Isolating Modbus RTU or Profibus DP communication between PLC master and field devices in noisy factory environments. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator separating controller-side UART signals from bus transceivers while maintaining precise timing alignment. Use Value: Enables reliable 25 Mbps data exchange with ≤1 ns channel skew and ≥25 kV/μs CMTI - preventing communication errors caused by ground loops or motor-drive noise. | Use Scenario: Isolating position feedback (e.g., encoder quadrature A/B) and motion command signals (PWM, direction) in servo amplifier modules. IC Role / Device Role / Timing Role: Bidirectional-capable isolation for command path (input) and feedback path (output), with failsafe output ensuring safe stop on input loss. Use Value: Maintains sub-ns timing fidelity for encoder edges and PWM edges - preserving closed-loop control accuracy and enabling SIL2-compliant safe torque off (STO). |
| Data Acquisition System | Automotive Battery Management |
Use Scenario: Isolating analog front-end ADC digital control lines (CS, SCLK, SDATA) and status signals from microcontroller in high-voltage battery monitoring units. IC Role / Device Role / Timing Role: Unidirectional isolator for SPI interface clock and data lines, with DISABLE pin enabling synchronous shutdown during fault detection. Use Value: Guarantees ≤2 ns pulse-width distortion on SCLK - preventing setup/hold violations in 16-bit SAR ADCs operating at 1 MSPS. | Use Scenario: Isolating cell voltage measurement IC (e.g., BQ769x0) digital interface and fault reporting lines from main MCU in 400V+ EV battery packs. IC Role / Device Role / Timing Role: Safety-certified isolator providing reinforced insulation between high-voltage domain and low-voltage control domain per ISO 26262 ASIL-B. Use Value: Delivers 2500 VRMS UL rating and 560 VPK working voltage - meeting creepage/clearance requirements for 400V DC systems without additional spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7240CDWQ1 | No DISABLE or CTRL pins; fixed-output logic without failsafe control. | Lacks input disable and programmable failsafe - unsuitable for ASIL-B or SIL2 systems requiring defined safe states. | Select ISO7240CFQDWRQ1 when deterministic failsafe behavior and input disable are required for functional safety compliance. |
| SI8640BB-B-IS | CMOS input thresholds (no noise filter); different pinout; lower CMTI (20 kV/μs). | Not certified to VDE 0884-17; lacks automotive AEC-Q100 qualification; no failsafe output configuration. | Choose ISO7240CFQDWRQ1 for automotive-grade safety certification, noise immunity, and failsafe configurability in harsh environments. |
Compared with ISO7240CDWQ1 and SI8640BB-B-IS, ISO7240CFQDWRQ1 uniquely combines programmable failsafe output, input disable, VDE/UL/IEC triple safety certification, and ≥25 kV/μs CMTI - making it the only option qualified for ASIL-B automotive isolation where safe state definition and noise resilience are mandatory.
Availability
ISO7240CFQDWRQ1 is available at Aetrix Electronics and suitable for factory automation interfaces, servo motor control systems, and automotive battery management requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant isolation performance.
Supply support for ISO7240CFQDWRQ1 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
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in isolation technology, automotive electronics, and industrial system design.
The ISO724xC-Q1 family targets automotive and industrial applications demanding reinforced isolation, functional safety compliance (ASIL-B), and robust operation across extended temperature ranges - specifically designed for CAN, LIN, Modbus, and servo control interfaces.
FAQ
What is the failsafe output behavior of ISO7240CFQDWRQ1 when VCC1 is powered down?
When VCC1 is powered down or the DISABLE pin is asserted high, the outputs of ISO7240CFQDWRQ1 enter a failsafe state determined solely by the CTRL pin: logic high if CTRL is open or driven high, logic low if CTRL is driven low. This behavior is guaranteed across –40°C to +125°C and ensures deterministic system response during input-side faults - a core requirement for ISO 26262 ASIL-B compliance. The ISO7240CFQDWRQ1 datasheet specifies tfs ≤18 μs for this transition.
Does ISO7240CFQDWRQ1 support mixed-voltage operation between input and output sides?
Yes, ISO7240CFQDWRQ1 supports independent 3.3V or 5V supplies on VCC1 and VCC2 - including combinations like VCC1 = 3.3V / VCC2 = 5V or vice versa. Input pins are 5V-tolerant regardless of VCC1 level, enabling direct connection to 5V controllers even when powered from 3.3V. This flexibility is verified across all switching and electrical specifications in the ISO7240CFQDWRQ1 datasheet sections 5.11 and 5.12.
How does the input noise filter in ISO7240CFQDWRQ1 improve system reliability?
The integrated input noise filter in ISO7240CFQDWRQ1 rejects transients shorter than 40 ns, preventing false triggering from EFT bursts, relay contact bounce, or switching noise in industrial settings. Unlike unfiltered isolators (e.g., ISO7240CDWQ1), this feature eliminates need for external RC filters or Schmitt triggers - reducing BOM count and PCB area while maintaining 25 Mbps throughput. The ISO7240CFQDWRQ1 specification confirms this filter is active only in "C-option" devices with TTL thresholds.
What safety certifications apply to ISO7240CFQDWRQ1 and what do they cover?
ISO7240CFQDWRQ1 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, UL 1577 for 2500 VRMS withstand voltage, and IEC 61010-1 / IEC 62368-1 for end-equipment safety. These certifications validate its suitability for automotive (AEC-Q100 Grade 1), industrial, and medical auxiliary power applications requiring basic or reinforced isolation. The ISO7240CFQDWRQ1 certificate numbers are listed in section 5.6 of its official datasheet.
Can ISO7240CFQDWRQ1 replace ISO7240CDWQ1 on an existing PCB layout?
No, ISO7240CFQDWRQ1 cannot be used as a drop-in replacement for ISO7240CDWQ1 due to pinout differences: Pin 7 is DISABLE (not NC) and Pin 10 is CTRL (not NC) in ISO7240CFQDWRQ1, whereas those pins are no-connect in ISO7240CDWQ1. Using ISO7240CFQDWRQ1 on a board designed for ISO7240CDWQ1 would cause unintended disable or failsafe activation unless the PCB is modified to route and control these pins appropriately.
ISO7240CFQDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 4000Vpk
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 3.15V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7240CFQDWRQ1 FAQ
1.How can I place an order for ISO7240CFQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7240CFQDWRQ1 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 ISO7240CFQDWRQ1 reliable?
The price and inventory of ISO7240CFQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7240CFQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7240CFQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7240CFQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7240CFQDWRQ1?
ISO7240CFQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7240CFQDWRQ1 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 ISO7240CFQDWRQ1?
For technical support, including ISO7240CFQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7240CFQDWRQ1 requirements.
6.How does Aetrix verify that ISO7240CFQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7240CFQDWRQ1 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 ISO7240CFQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7240CFQDWRQ1?
All ISO7240CFQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7240CFQDWRQ1, 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 ISO7240CFQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7240CFQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7240CFQDWRQ1 Tags
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