My Inquiry
My Account
Texas Instruments ISO7342FCQDWRQ1
- Part No.:
- ISO7342FCQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7342FCQDWRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,351
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISO7342FCQDWRQ1 from Texas Instruments is a quad-channel automotive-grade digital isolator with two forward and two reverse signal paths, 25 Mbps signaling rate, 31 ns typical propagation delay (5-V), 3.3-V/5-V dual-supply operation, and integrated input noise filtering. It enables robust galvanic isolation in motor control and battery pack monitoring systems where high transient immunity and fail-safe default-low outputs are required.
For engineers reviewing the ISO7342FCQDWRQ1 datasheet, ISO7342FCQDWRQ1 pinout, ISO7342FCQDWRQ1 application, or ISO7342FCQDWRQ1 equivalent, this page delivers verified technical context, exact pin functions, automotive safety certifications (AEC-Q100 Grade 1, UL 1577, VDE 0884-10), real-world supply current vs. data rate behavior, and validated alternative parts for functional replacement in isolated bus interfaces.
Technical Context
The ISO7342FCQDWRQ1 implements capacitive SiO₂-based galvanic isolation across four independent channels-two input-to-output (forward) and two output-to-input (reverse)-with separate VCCI/GNDI and VCCO/GNDO power domains. Its integrated noise filter suppresses short-duration transients on input pins, and its fail-safe logic defaults outputs low upon input-side power loss (suffix 'F' denotes this behavior).
It supports bidirectional communication over isolated interfaces without external level-shifting, maintains 70 kV/μs CMTI (5-V) and 50 kV/μs (3.3-V), and meets reinforced insulation requirements per UL 1577 (3000 VRMS), VDE 0884-10 (4242 VPK), and IEC 61010-1, enabling use in ASIL-B–capable subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4-channel: 2 forward + 2 reverse direction; enables bidirectional isolated communication without external routing logic |
| Signaling Rate | 25 Mbps max; supports high-speed fieldbus protocols including CAN FD physical layer timing margins |
| Propagation Delay | 31 ns typical (5-V); ensures tight timing alignment in servo position feedback loops and PWM gate drive synchronization |
| Supply Voltage | VCCI/VCCO = 3.3 V or 5 V ±10%; allows interoperability with mixed-voltage microcontrollers and isolated DC/DC converters |
| CMTI | 70 kV/μs typical (5-V); rejects fast common-mode transients induced by IGBT switching in motor drives |
| Isolation Rating | 3000 VRMS (UL), 4242 VPK (VDE); certified for reinforced insulation in battery management and traction inverter subsystems |
| Fail-Safe Output | Default-low on input power loss ('F' suffix); prevents unintended actuation in safety-critical motor enable paths |
Pinout & Package
ISO7342FCQDWRQ1 uses a wide-body SOIC-16 (DW) package (10.30 mm × 7.50 mm) with creepage/clearance >8 mm, optimized for high-voltage isolation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input terminals (side-1) | Accept TTL-level signals; INC and IND map to reverse-direction channels in ISO7342-Q1 configuration |
| OUTA, OUTB, OUTC, OUTD | Output terminals (side-2) | Drive CMOS loads; OUTC and OUTD serve reverse-path outputs, enabling bidirectional data flow across isolation barrier |
| VCCI, GNDI | Input-side power domain | Supplies input buffers and logic; electrically isolated from output side to break ground loops |
| VCCO, GNDO | Output-side power domain | Supplies output drivers; supports independent 3.3-V or 5-V rail, enabling level translation between domains |
| EN1, EN2 | Channel-group enable inputs | EN1 controls side-1 outputs (OUTA/OUTB); EN2 controls side-2 outputs (OUTC/OUTD); both float-high for default enable |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in engine bay and battery pack environments |
| Integrated input noise filter | Suppresses <40 ns glitches; eliminates need for external RC filters in noisy industrial fieldbus nodes |
| Dual-supply level translation | Translates signals between 3.3-V MCU I/O and 5-V isolated power domains without external level shifters |
| Low power at 1 Mbps | 0.9 mA per channel (3.3-V); reduces thermal load in densely packed EV battery monitor modules |
| High CMTI immunity | 70 kV/μs (5-V); sustains reliable operation during 650-V IGBT switching events in motor inverters |
Applications
| Industrial Fieldbus Isolation | Automotive Battery Pack Monitoring |
|---|---|
Use Scenario: Isolating RS-485 transceivers in Profibus/Modbus networks exposed to EFT and surge events in factory automation cabinets. IC Role / Device Role / Timing Role: Digital isolator providing signal integrity and ground-loop elimination between controller and distributed I/O modules. Use Value: Eliminates need for optocouplers while delivering 25 Mbps throughput and 70 kV/μs CMTI to meet IEC 61000-4-4/5 compliance. |
Use Scenario: Isolating cell voltage measurement ADCs and balancing FET drivers in 400-V EV battery packs. IC Role / Device Role / Timing Role: Bidirectional isolator enabling safe communication between high-side monitor IC and low-side MCU across 500-V potential difference. Use Value: Two reverse channels support command feedback from MCU to balancer IC; fail-safe low default prevents uncommanded cell discharge. |
| Servo Control Interface | Motor Inverter Gate Drive Isolation |
Use Scenario: Isolating position encoder feedback (A/B/Z) and motion command lines (enable, direction, step) in robotic joint actuators. IC Role / Device Role / Timing Role: Quad-channel isolator handling bidirectional encoder clock/data and unidirectional control signals with matched propagation delay. Use Value: 31 ns typical tPLH/tPHL and ≤4 ns pulse skew preserve encoder timing integrity at 1 MHz update rates. |
Use Scenario: Isolating PWM signals from MCU to high-side gate drivers in 3-phase traction inverters with 650-V SiC MOSFETs. IC Role / Device Role / Timing Role: Forward-channel isolator transmitting dead-time–critical PWM edges while rejecting dV/dt-induced noise on gate driver return paths. Use Value: 70 kV/μs CMTI prevents false turn-on during 50 kV/μs bus transients; 25 Mbps rating accommodates >100 kHz PWM carrier frequencies. |
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 |
|---|---|---|---|
| ISO7342CQDWRQ1 | No 'F' suffix → default output is high on input power loss | Preferred where fail-safe high state is required (e.g., active-high enable for safety relays) | Select ISO7342CQDWRQ1 only if system architecture requires high-default outputs; otherwise ISO7342FCQDWRQ1 is optimal for low-default safety paths |
| SI8642ED-B-IS | Capacitive isolator with 25 Mbps, AEC-Q100 Grade 1, but no integrated noise filter and 30 kV/μs CMTI (vs. 70 kV/μs) | Suitable for less electrically noisy environments; lacks input glitch suppression for harsh EFT conditions | Choose SI8642ED-B-IS only when cost sensitivity outweighs need for integrated noise filtering and highest CMTI in motor drive applications |
Compared with ISO7342CQDWRQ1 and SI8642ED-B-IS, ISO7342FCQDWRQ1 uniquely combines fail-safe low default, 70 kV/μs CMTI, and integrated input noise filtering-making it the only option qualified for ASIL-B–relevant motor control and battery monitoring where transient resilience and deterministic fault behavior are mandatory.
Availability
ISO7342FCQDWRQ1 is available at Aetrix Electronics and suitable for automotive battery management, motor inverter control, servo interface design, and industrial fieldbus isolation requiring stable component supply across extended product lifecycles.
Supply support for ISO7342FCQDWRQ1 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 specializing in analog and embedded processing technologies, with deep expertise in automotive-grade isolation, power management, and signal chain solutions.
The ISO734x-Q1 family was designed specifically for ASIL-B–capable automotive subsystems-including battery monitoring, motor control, and charging interfaces-where high-reliability galvanic isolation, AEC-Q100 compliance, and fail-safe behavior are non-negotiable.
FAQ
What does the 'F' suffix in ISO7342FCQDWRQ1 indicate?
The 'F' suffix in ISO7342FCQDWRQ1 specifies fail-safe default-low output behavior: when input-side power (VCCI/GNDI) is lost, all outputs transition to and hold a logic-low state. This is critical for safety-critical paths such as motor enable lines or battery disconnect commands, preventing unintended activation. The ISO7342FCQDWRQ1 implements this via internal circuitry that asserts low on power-down, distinct from the high-default ISO7342CQDWRQ1 variant.
Does ISO7342FCQDWRQ1 support bidirectional communication?
Yes, ISO7342FCQDWRQ1 supports true bidirectional communication across its isolation barrier: two channels (INA→OUTA, INB→OUTB) operate forward, while two others (INC←OUTC, IND←OUTD) operate reverse. This eliminates the need for external signal direction control logic in applications like isolated UART or SPI interfaces, where command and response traffic flow across the same barrier.
What are the key isolation certifications for ISO7342FCQDWRQ1?
ISO7342FCQDWRQ1 holds UL 1577 (3000 VRMS, 1 min), VDE V 0884-10 (4242 VPK basic insulation), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and GB4943.1-2011 CQC certification. These validate its suitability for reinforced insulation in automotive battery systems and industrial equipment operating up to 500 VRMS working voltage under pollution degree 2 conditions.
How does the integrated noise filter in ISO7342FCQDWRQ1 improve system reliability?
The integrated noise filter in ISO7342FCQDWRQ1 suppresses input transients shorter than ~40 ns-common in electrically noisy environments like motor drives and factory floors. By eliminating the need for external RC filters, it reduces component count and PCB area while ensuring clean signal edges reach downstream logic, directly improving immunity to IEC 61000-4-4 EFT bursts without sacrificing data rate.
Can ISO7342FCQDWRQ1 operate with mismatched supply voltages (e.g., 3.3 V on VCCI and 5 V on VCCO)?
Yes, ISO7342FCQDWRQ1 supports independent 3.3-V or 5-V supplies on VCCI and VCCO-enabling seamless level translation between a 3.3-V microcontroller and a 5-V isolated power domain. Electrical characteristics (VOH/VOL, propagation delay, CMTI) are fully specified across both supply combinations, and no external level shifters are required, simplifying mixed-voltage system design.
ISO7342FCQDWRQ1 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:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 58ns, 58ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 2.1ns, 1.7ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7342FCQDWRQ1 FAQ
1.How can I place an order for ISO7342FCQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7342FCQDWRQ1 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 ISO7342FCQDWRQ1 reliable?
The price and inventory of ISO7342FCQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7342FCQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7342FCQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7342FCQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7342FCQDWRQ1?
ISO7342FCQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7342FCQDWRQ1 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 ISO7342FCQDWRQ1?
For technical support, including ISO7342FCQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7342FCQDWRQ1 requirements.
6.How does Aetrix verify that ISO7342FCQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7342FCQDWRQ1 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 ISO7342FCQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7342FCQDWRQ1?
All ISO7342FCQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7342FCQDWRQ1, 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 ISO7342FCQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7342FCQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7342FCQDWRQ1 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
