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Texas Instruments ISO7341CDW
- Part No.:
- ISO7341CDW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7341CDW.pdf
- Description:
- DGTL ISO 3000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,040
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Product details
Overview
ISO7341CDW from Texas Instruments is a quad-channel digital isolator with three forward and one reverse signal channels, 3000 VRMS isolation rating per UL 1577, 25 Mbps signaling rate, and integrated input noise filtering for industrial bus interfaces. It operates across 3.3-V and 5-V supplies, supports –40°C to 125°C ambient, and uses SiO₂ barrier insulation in a wide-body SOIC-16 package.
For engineers reviewing the ISO7341CDW datasheet, ISO7341CDW pinout, ISO7341CDW application, or ISO7341CDW equivalent, key selection criteria include channel directionality (3F/1R), low 1.2 mA typical ICC per channel at 1 Mbps (5 V), 31 ns propagation delay, 70 kV/μs CMTI, and safety certifications including UL 3000 VRMS, VDE 4242 VPK, and CQC GB4943.1-2011.
Technical Context
The ISO7341CDW implements galvanic isolation using a silicon dioxide (SiO₂) dielectric barrier separating input-side (VCCI/GNDI) and output-side (VCCO/GNDO) domains. Its 3-forward/1-reverse channel configuration enables bidirectional data flow control in protocols requiring asymmetric communication paths, such as fieldbus master-slave topologies.
It features TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max), integrated noise filtering on all inputs, dual independent enable controls (EN1 for side-1 outputs, EN2 for side-2 outputs), and robust EMC performance including system-level ESD/EFT/surge immunity and low emissions - validated per IEC 61000-4-x and CISPR standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS for 1 minute (UL 1577); 4242 VPK basic insulation (DIN V VDE V 0884-10) |
| Signaling Rate | 25 Mbps - supports high-speed industrial serial protocols including Profibus DP and Modbus RTU |
| Propagation Delay | 31 ns typical (5 V) - enables tight timing budgets in servo control and real-time motor drives |
| Supply Voltage | 3.0 V to 5.5 V on both sides - allows level translation between 3.3-V microcontrollers and 5-V peripherals |
| ICC per Channel | 1.2 mA typical at 1 Mbps (5 V) - reduces thermal load and power supply sizing in multi-isolator systems |
| CMTI | 70 kV/μs typical (5 V) - ensures reliable operation in noisy motor drive and power supply environments |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive and industrial control cabinet deployment |
Pinout & Package
ISO7341CDW is housed in a wide-body SOIC-16 (DW) package measuring 10.30 mm × 7.50 mm with creepage/clearance >8 mm and internal SiO₂ insulation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Input channels A–D | INA–INB are forward-direction inputs; INC is forward; IND is reverse-direction input |
| OUTA, OUTB, OUTC, OUTD | Output channels A–D | OUTA–OUTB–OUTC are forward outputs; OUTD is reverse-direction output |
| VCCI, GNDI | Input-side power domain | Supplies logic for input buffers and EN1; electrically isolated from output side |
| VCCO, GNDO | Output-side power domain | Supplies logic for output buffers and EN2; enables level-shifting between domains |
| EN1, EN2 | Independent output enables | EN1 controls OUTA/OUTB; EN2 controls OUTC/OUTD - supports partial channel shutdown |
Key Features
| Feature | Design Value |
|---|---|
| 3F/1R channel architecture | Enables asymmetric bidirectional communication in master-slave fieldbus systems without external logic |
| Integrated input noise filter | Rejects short-duration transients (<40 ns) common in industrial motor control and PLC backplanes |
| Dual independent enable pins | Allows selective power gating of side-1 (OUTA/OUTB) and side-2 (OUTC/OUTD) to reduce dynamic power by up to 50% |
| TTL input thresholds | Direct interface with legacy 5-V microcontrollers and FPGAs without level-shifter circuitry |
| 70 kV/μs CMTI | Prevents data corruption during fast-switching events in IGBT gate drivers and DC-DC converters |
Applications
| Industrial Fieldbus Interface | Motor Drive Control |
|---|---|
Use Scenario: Isolating RS-485 transceivers in Profibus DP or Modbus RTU networks operating in factory automation cabinets with high EMI. IC Role / Device Role / Timing Role: Quad-channel isolator providing signal integrity across galvanically separated controller and slave nodes; 3F/1R configuration supports command-response protocol framing. Use Value: Eliminates ground loop currents and prevents bus lockup during surge events while maintaining 25 Mbps throughput for real-time diagnostics. | Use Scenario: Isolating PWM and feedback signals between MCU and three-phase inverter stage in servo drives. IC Role / Device Role / Timing Role: Forward channels carry PWM commands (OUTA–OUTC); reverse channel (OUTD) returns encoder position or current sense data - all synchronized within 31 ns skew. Use Value: Enables safe, high-fidelity closed-loop control with immunity to 70 kV/μs transients generated by IGBT switching. |
| Programmable Logic Controller (PLC) I/O Module | Isolated Power Supply Monitoring |
Use Scenario: Digital input/output isolation in modular PLC backplanes where 24-V field sensors and actuators connect to 3.3-V logic. IC Role / Device Role / Timing Role: Provides four independent isolation paths with 3.3-V/5-V level translation; EN1/EN2 allow hot-swap sequencing of I/O groups. Use Value: Supports mixed-voltage system design and reduces board space versus discrete optocoupler solutions by >60%. | Use Scenario: Monitoring isolated DC-DC converter health via voltage/current telemetry in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Reverse channel (IND→OUTD) transmits fault alerts from secondary-side monitoring ICs to primary-side controllers across reinforced insulation barrier. Use Value: Enables fast fault reporting (<100 ns latency) while maintaining 3000 VRMS working voltage compliance per UL 62368-1. |
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 |
|---|---|---|---|
| ISO7341CDWR | Same electrical specs and pinout; tape-and-reel packaging instead of tube | No functional difference; selected for automated SMT assembly | Preferred for volume production with pick-and-place equipment |
| ADUM1401ARWZ | 4-channel, 100 Mbps, 2.5 kV RMS isolation; CMOS input; no integrated noise filter | Lacks built-in transient filtering and has lower CMTI (25 kV/μs); requires external RC filtering for harsh environments | Consider only in low-noise lab or test equipment where cost sensitivity outweighs EMC robustness |
Compared with ISO7341CDW, ISO7341CDWR offers identical performance in tape-and-reel form for manufacturing scalability, while ADUM1401ARWZ trades isolation robustness and integrated noise immunity for higher speed and lower cost - making it unsuitable for industrial fieldbus or motor control without additional protection circuitry.
Availability
ISO7341CDW is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, motor drive control systems, and programmable logic controller (PLC) I/O modules requiring stable component supply, long-term lifecycle support, and certified safety isolation.
Supply support for ISO7341CDW 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The ISO734x family was designed specifically for robust galvanic isolation in harsh industrial environments - emphasizing EMC resilience, wide temperature operation, and safety certification compliance over raw speed or ultra-low power.
FAQ
What is the channel configuration of the ISO7341CDW?
The ISO7341CDW features a fixed 3-forward / 1-reverse channel configuration: inputs INA, INB, and INC drive forward-direction outputs OUTA, OUTB, and OUTC respectively, while input IND drives reverse-direction output OUTD. This architecture is optimized for asymmetric bidirectional protocols like Profibus and Modbus, and is distinct from the 4F (ISO7340x) and 2F/2R (ISO7342x) variants in the same family.
Does the ISO7341CDW support level translation between 3.3-V and 5-V domains?
Yes, the ISO7341CDW supports true bidirectional level translation: VCCI and VCCO can be independently powered from 3.0 V to 5.5 V, enabling direct interfacing between 3.3-V microcontrollers and 5-V peripheral circuits without external level shifters. Input thresholds remain TTL-compatible across both supply ranges, and output drive strength is maintained per specification (VOH ≥ VCCO – 0.5 V at –4 mA).
What safety certifications does the ISO7341CDW hold?
The ISO7341CDW holds UL 1577 (3000 VRMS, 1 minute), DIN V VDE V 0884-10 (4242 VPK basic insulation), CSA Component Acceptance Notice 5A (IEC 60950-1 and IEC 61010-1), and CQC GB4943.1-2011 certification. These cover reinforced insulation requirements for industrial end equipment, including working voltage ratings up to 250 VRMS and surge immunity to 6000 VPK per IEC 61000-4-5.
How does the integrated noise filter in the ISO7341CDW improve system reliability?
The ISO7341CDW's integrated input noise filter rejects short-duration transients (<40 ns pulse width) commonly induced by switching noise in motor drives and power supplies. This eliminates the need for external RC filters or Schmitt-trigger buffers, reducing BOM count and PCB area while ensuring deterministic signal edge detection - critical for error-free operation in Modbus ASCII frames or Profibus DP cyclic data exchange.
Can the ISO7341CDW replace optocouplers in existing designs?
Yes, the ISO7341CDW is explicitly designed as a drop-in optocoupler replacement in industrial fieldbus, servo control, and power supply applications. Its SOIC-16 footprint matches common optocoupler packages, and its 25 Mbps speed, low propagation delay (31 ns), and TTL-compatible I/O eliminate redesign requirements. Unlike optocouplers, it delivers stable timing over temperature and lifetime, with no LED aging or CTR degradation.
ISO7341CDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7341CDW FAQ
1.How can I place an order for ISO7341CDW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7341CDW 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 ISO7341CDW reliable?
The price and inventory of ISO7341CDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7341CDW is usually 5 days.
3.What payment methods are accepted for ISO7341CDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7341CDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7341CDW?
ISO7341CDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7341CDW 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 ISO7341CDW?
For technical support, including ISO7341CDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7341CDW requirements.
6.How does Aetrix verify that ISO7341CDW is sourced from the original manufacturer or authorized distributors?
All ISO7341CDW 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 ISO7341CDW meets industry standards.
7.What is the process for return or replacement of ISO7341CDW?
All ISO7341CDW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7341CDW, 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 ISO7341CDW part is unused and in its original packaging.
Return procedure for ISO7341CDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7341CDW Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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