My Inquiry
My Account
Texas Instruments ISO7342CQDWRQ1
- Part No.:
- ISO7342CQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7342CQDWRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 4CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:675
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISO7342CQDWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad-channel digital isolator with two forward and two reverse signal paths, 25 Mbps signaling rate, 31 ns typical propagation delay (5-V), and integrated noise filtering for harsh industrial environments. It provides 3000 VRMS isolation per UL 1577 and 4242 VPK basic insulation per VDE V 0884-10, used in servo control interfaces and battery pack monitoring systems.
For engineers reviewing the ISO7342CQDWRQ1 datasheet, ISO7342CQDWRQ1 pinout, ISO7342CQDWRQ1 application, or ISO7342CQDWRQ1 equivalent, key selection criteria include channel directionality (2F/2R), fail-safe default output behavior, CMTI of 70 kV/μs (5-V), dual 3.3-V/5-V supply support, and SOIC-16 wide-body package with reinforced creepage/clearance >8 mm.
Technical Context
The ISO7342CQDWRQ1 implements galvanic isolation using a silicon dioxide (SiO₂) barrier separating input-side (VCCI/GNDI) and output-side (VCCO/GNDO) domains. Its dual enable pins (EN1, EN2) independently control side-1 and side-2 outputs, supporting asymmetric power management in safety-critical automotive subsystems.
It features TTL-compatible input thresholds, 450 mV input hysteresis (3.3-V), and failsafe operation: loss of input power forces outputs to high state (no "F" suffix). The device meets system-level ESD, EFT, and surge immunity requirements per IEC 61000-4 standards without external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS for 1 min (UL 1577); 4242 VPK basic (VDE V 0884-10) |
| Signaling Rate | 25 Mbps - supports high-speed CAN FD, SENT, or SPI isolation in automotive ECUs |
| Propagation Delay | 31 ns typical (5-V) - enables tight timing budgets in motor control PWM feedback loops |
| CMTI | 70 kV/μs typical (5-V) - suppresses fast transients in high-di/dt power stages like inverters |
| Supply Range | 3.0–5.5 V on both sides - allows direct interfacing with 3.3-V microcontrollers and 5-V analog sensors |
| Channel Configuration | 2 forward + 2 reverse - enables bidirectional communication across isolation barrier (e.g., UART with RTS/CTS) |
| Fail-Safe Default | Output high on input power loss - ensures safe shutdown state in battery management systems |
Pinout & Package
ISO7342CQDWRQ1 uses a wide-body 16-pin SOIC (DW) package measuring 10.30 mm × 7.50 mm, with ≥8 mm creepage and clearance for reinforced insulation in automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Input-side and output-side power supplies | Independent 3.3-V/5-V rails enable level translation between disparate logic domains |
| GND1, GND2 | Input-side and output-side ground references | Galvanically isolated grounds prevent ground-loop noise coupling in motor drives |
| INA, INB, INC, IND | Digital input channels A–D | TTL-input thresholds (VIH = 2 V, VIL = 0.8 V) ensure compatibility with legacy microcontrollers |
| OUTA, OUTB, OUTC, OUTD | Digital output channels A–D | CMOS outputs drive 4 mA loads; VOH/VOL specified at ±4 mA for robust logic-level margin |
| EN1, EN2 | Side-1 and side-2 output enable controls | Independent gating allows dynamic power reduction on isolated bus segments during sleep modes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in engine bay and battery modules |
| Integrated input noise filter | Suppresses <40 ns glitches - eliminates need for external RC filters in noisy 12-V vehicle harnesses |
| Dual supply voltage support | Operates with VCCI = 3.3 V and VCCO = 5 V simultaneously - simplifies interface to mixed-voltage ECUs |
| High CMTI (70 kV/μs) | Withstands rapid common-mode transients from IGBT switching in traction inverters |
| Low power at 1 Mbps | 0.9 mA per channel (3.3-V) - extends battery life in always-on telematics modules |
Applications
| Industrial Fieldbus Isolation | Servo Control Interface |
|---|---|
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 across galvanic barrier while maintaining 25 Mbps data throughput. Use Value: Eliminates ground-loop errors and prevents controller damage during 4 kV EFT bursts per IEC 61000-4-4. | Use Scenario: Isolating position encoder feedback (A/B/Z quadrature) and PWM command signals between servo drive and motion controller. IC Role / Device Role / Timing Role: Bidirectional isolator with 2F/2R channel mapping enabling full-duplex encoder interface with sub-31 ns timing skew. Use Value: Maintains closed-loop control stability under 70 kV/μs motor switching noise, preventing position drift. |
| Battery Pack Monitoring | Automotive Power Supply Control |
Use Scenario: Isolating cell voltage and temperature sensor data from high-voltage battery stacks (400–800 VDC) to low-voltage BMS MCU. IC Role / Device Role / Timing Role: Fail-safe isolator asserting high-level outputs on input power loss to trigger emergency disconnect. Use Value: Ensures ASIL-B functional safety compliance by guaranteeing known state during supply brownout. | Use Scenario: Isolating enable/disable commands and fault feedback between 12-V body controller and 48-V DC-DC converter in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Dual-enable (EN1/EN2) isolator allowing independent control of primary and secondary side power sequencing. Use Value: Prevents shoot-through during startup/shutdown by enforcing strict power-up order across isolation boundary. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7342CDWQ1 | No automotive qualification (non-Q1); same pinout, electrical specs, and 2F/2R channel configuration | Not suitable for AEC-Q100-compliant automotive designs; intended for industrial use only | Select ISO7342CDWQ1 only for cost-sensitive non-automotive applications where Grade 1 temperature range is not required |
| SI8642ED-B-IS | 4-channel, 2F/2R, 150 Mbps max rate; higher CMTI (100 kV/μs); different pinout (SOIC-16 but incompatible mapping) | Requires PCB redesign due to non-pin-compatible layout; better for ultra-high-noise EV inverter gate drivers | Choose SI8642ED-B-IS when >25 Mbps bandwidth or >70 kV/μs CMTI is mandatory, accepting layout change effort |
Compared with ISO7342CDWQ1, ISO7342CQDWRQ1 adds AEC-Q100 qualification and extended temperature validation; compared with SI8642ED-B-IS, it offers drop-in replacement for existing TI-based designs but trades off peak speed and CMTI for automotive compliance and supply chain continuity.
Availability
ISO7342CQDWRQ1 is available at Aetrix Electronics and suitable for automotive battery management, servo motor control, and industrial fieldbus isolation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISO7342CQDWRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade isolation solutions.
The ISO734x-Q1 product line was designed specifically for functional safety-critical automotive subsystems requiring reinforced isolation, including battery monitoring, motor control, and domain controllers operating from –40°C to +125°C.
FAQ
What is the default output state of ISO7342CQDWRQ1 during input power loss?
The ISO7342CQDWRQ1 defaults to high output state when input-side power (VCCI/GNDI) is lost. This fail-safe behavior is inherent to the part number's lack of "F" suffix and ensures predictable shutdown in battery pack monitoring systems. The output remains high until VCCI is restored or EN1/EN2 are actively driven low. This behavior is verified per the Device Functional Modes section of the datasheet and applies across the full –40°C to +125°C operating range.
Does ISO7342CQDWRQ1 support level translation between 3.3-V and 5-V logic domains?
Yes, ISO7342CQDWRQ1 supports true bidirectional level translation: VCCI can be powered from 3.3 V while VCCO operates at 5 V (or vice versa), with TTL-compatible inputs and CMOS outputs referenced to their respective supplies. Input thresholds (VIH = 2 V, VIL = 0.8 V) remain valid across 3.0–5.5 V supply range, and output drive strength (±4 mA) is guaranteed at both voltages. This capability is confirmed in Sections 7.3 and 7.9–7.12 of the datasheet.
What is the maximum common-mode transient immunity (CMTI) of ISO7342CQDWRQ1?
The ISO7342CQDWRQ1 delivers 70 kV/μs typical CMTI at 5-V supply, as measured per Figure 17 in the datasheet. This value is validated under VI = VCC or 0 V conditions and represents immunity to fast-rising noise on the isolation barrier - critical for reliability in IGBT-driven motor inverters. At 3.3-V supply, CMTI is 50 kV/μs typical. Both values exceed automotive EMC requirements and eliminate need for external transient suppression components.
How many enable pins does ISO7342CQDWRQ1 have, and what do they control?
ISO7342CQDWRQ1 has two independent enable pins: EN1 controls outputs on side-1 (OUTA, OUTB), and EN2 controls outputs on side-2 (OUTC, OUTD). Each enables high-impedance state when pulled low, allowing selective channel shutdown without affecting the other side. This dual-enable architecture supports asymmetric power management in automotive domain controllers, and is distinct from single-EN devices like ISO7340-Q1. Pin functions are defined in Table 6.1 of the datasheet.
What safety certifications does ISO7342CQDWRQ1 hold?
ISO7342CQDWRQ1 is certified to UL 1577 (3000 VRMS, 1 min), VDE V 0884-10 (4242 VPK basic), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and GB4943.1-2011 (CQC certified). These cover reinforced insulation for automotive applications up to 250 VRMS working voltage, with altitude derating ≤5000 m. Certification documentation numbers (e.g., E181974 for UL, 40016131 for VDE) are listed in Section 7.7 of the datasheet.
ISO7342CQDWRQ1 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
ISO7342CQDWRQ1 FAQ
1.How can I place an order for ISO7342CQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7342CQDWRQ1 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 ISO7342CQDWRQ1 reliable?
The price and inventory of ISO7342CQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7342CQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7342CQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7342CQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7342CQDWRQ1?
ISO7342CQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7342CQDWRQ1 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 ISO7342CQDWRQ1?
For technical support, including ISO7342CQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7342CQDWRQ1 requirements.
6.How does Aetrix verify that ISO7342CQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7342CQDWRQ1 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 ISO7342CQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7342CQDWRQ1?
All ISO7342CQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7342CQDWRQ1, 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 ISO7342CQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7342CQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7342CQDWRQ1 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…
