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Texas Instruments ISO7340FCDW
- Part No.:
- ISO7340FCDW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7340FCDW.pdf
- Description:
- DGTL ISO 3000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
ISO7340FCDW from Texas Instruments is a quad-channel digital isolator with galvanic isolation up to 3000 VRMS (1 min, UL 1577) and 4242 VPK (DIN V VDE V 0884-10), featuring four unidirectional forward channels, 25 Mbps signaling rate, 31 ns typical propagation delay at 5-V supplies, and dual 3.3-V/5-V supply capability (VCCI/VCCO). It serves as an optocoupler replacement in industrial fieldbus interfaces requiring robust noise immunity and level translation.
For engineers reviewing the ISO7340FCDW datasheet, ISO7340FCDW pinout, ISO7340FCDW application, or ISO7340FCDW equivalent, key selection criteria include channel directionality (4× forward), default-low output behavior (suffix 'F'), integrated input noise filtering, 70 kV/μs CMTI, and SOIC-16 wide-body package compliance with safety certifications including UL 1577, VDE 0884-10, CSA 5A, and GB4943.1-2011.
Technical Context
The ISO7340FCDW implements capacitive SiO₂-based isolation with separate input-side (VCCI/GNDI) and output-side (VCCO/GNDO) power domains, enabling bidirectional level translation between 3.3-V and 5-V logic systems. Its architecture includes TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V), integrated noise filter on all inputs, and independent enable control per side (EN1/EN2).
It operates across –40°C to +125°C ambient temperature with low power consumption: 0.9 mA/channel typical at 1 Mbps with 5-V supplies, and 0.7 mA/channel at 3.3-V supplies. Safety isolation is certified for basic insulation per DIN V VDE V 0884-10 and reinforced per UL 1577, with 2.4 pF barrier capacitance and >10¹² Ω isolation resistance at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS (1 min, UL 1577); 4242 VPK (DIN V VDE V 0884-10) - enables safe separation of high-noise industrial bus domains from sensitive control logic |
| Signaling Rate | 25 Mbps - supports high-speed serial protocols like Profibus DP and Modbus RTU without timing bottlenecks |
| Propagation Delay | 31 ns typical (5-V supplies) - ensures tight timing budgets in servo control feedback loops and real-time motor drives |
| Supply Voltage Range | VCCI/VCCO: 3 V to 5.5 V - allows flexible integration with mixed-voltage systems without external level shifters |
| Input Noise Filter | Integrated on all INx pins - suppresses sub-40 ns transients common in factory-floor EFT and surge environments |
| Default Output State | Low (suffix 'F') - provides fail-safe behavior during input power loss in safety-critical power supply monitoring |
| CMTI | 70 kV/μs typical (5-V supplies) - prevents data corruption during fast-switching events in inverters and motor drives |
Pinout & Package
ISO7340FCDW uses a wide-body 16-pin SOIC (DW) package measuring 10.30 mm × 7.50 mm, optimized for creepage/clearance >8 mm and internal insulation gap >13 µm to meet reinforced isolation standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA–IND (Pins 3–6) | Input channels A–D | TTL-compatible digital inputs referenced to VCCI/GNDI; accept 0–5.5 V signals with 480 mV hysteresis |
| OUTA–OUTD (Pins 11–14) | Output channels A–D | CMOS outputs referenced to VCCO/GNDO; drive ±4 mA with VOH ≥ VCCO – 0.5 V and VOL ≤ 0.4 V |
| VCCI (Pin 1), GNDI (Pins 2,8) | Input-side power domain | Supplies input buffers and logic; decoupling required near Pin 1 to minimize noise coupling into isolation barrier |
| VCCO (Pin 16), GNDO (Pins 9,15) | Output-side power domain | Supplies output drivers independently; enables ground-loop elimination between controller and actuator subsystems |
| EN1 (Pin 7), EN2 (Pin 10) | Side-selectable output enables | EN1 controls OUTA/OUTB; EN2 controls OUTC/OUTD; low disables outputs to high-impedance state |
Key Features
| Feature | Design Value |
|---|---|
| Four forward-direction channels | Enables full-duplex isolation of command and status lines in PLC I/O modules without reverse-path latency |
| Default-low output ('F' suffix) | Guarantees safe shutdown state during brownout or MCU reset in battery pack BMS and power supply supervision |
| Integrated input noise filter | Rejects <40 ns pulses from EFT bursts per IEC 61000-4-4, eliminating need for external RC filters in industrial gate drivers |
| 3.3-V/5-V level translation | Allows direct interface between 3.3-V microcontrollers and 5-V fieldbus transceivers (e.g., RS-485) without discrete level shifters |
| 70 kV/μs CMTI | Maintains data integrity during rapid dV/dt events in SiC/GaN inverter switching nodes adjacent to isolated gate drivers |
Applications
| Industrial Fieldbus Interface | Motor Drive Control |
|---|---|
Use Scenario: Isolating PROFIBUS DP or Modbus RTU communication lines between PLC master and remote I/O stations in noisy factory environments. IC Role / Device Role / Timing Role: Quad-channel forward isolator separating RS-485 transceiver grounds from controller logic, preserving signal integrity at 12 Mbps. Use Value: Eliminates ground loop currents that cause packet errors and bus lockups, while meeting IEC 61000-4-5 surge immunity requirements via 6000 VPK surge rating. | Use Scenario: Providing isolated gate-drive enable signals and fault feedback paths in three-phase servo inverters with integrated current sensing. IC Role / Device Role / Timing Role: Forward-channel isolator delivering PWM enable commands from MCU to isolated gate driver ICs and returning overcurrent flags. Use Value: 31 ns propagation delay ensures <100 ns total enable-to-fault-response latency, critical for IGBT short-circuit protection within 10 µs window. |
| Power Supply Monitoring | Battery Management System |
Use Scenario: Isolating voltage/current measurement ADC outputs and enable signals in AC/DC and DC/DC power supplies with secondary-side regulation. IC Role / Device Role / Timing Role: Forward isolator transmitting analog-to-digital conversion results and soft-start commands across isolation barrier. Use Value: Default-low output ensures PWM disable upon primary-side power failure, preventing uncontrolled output voltage rise during brownout conditions. | Use Scenario: Isolating cell voltage monitoring and balancing control signals between high-voltage battery stack (up to 1000 V) and low-voltage MCU in EV traction packs. IC Role / Device Role / Timing Role: Forward isolator conveying cell voltage readings and balancing switch commands across reinforced insulation barrier. Use Value: 4242 VPK transient rating withstands common-mode surges induced by high-di/dt switching in adjacent traction inverters. |
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 |
|---|---|---|---|
| ISO7340CDW | Same pinout and specs, but default output is high (no 'F' suffix) | Suitable where fail-safe requires active-high enable or status reporting during power loss | Select ISO7340CDW when system logic expects asserted-high fault indicators or startup-ready signals after reset |
| ADUM1400ARWZ | 4-channel, 25 Mbps, but uses magnetic coupling; no integrated noise filter; 25 kV/μs CMTI | Limited to lower-noise environments; lacks built-in EFT suppression for harsh industrial settings | Choose ADUM1400ARWZ only if board-level filtering is already implemented and VDE certification is not required |
Compared with ISO7340CDW, ISO7340FCDW provides fail-safe low-default behavior critical for power-supply shutdown sequencing; compared with ADUM1400ARWZ, it delivers superior 70 kV/μs CMTI and integrated noise filtering essential for unfiltered industrial bus interfaces.
Availability
ISO7340FCDW is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, motor drive control systems, power supply monitoring circuits, and battery management systems requiring stable component supply and long-term lifecycle support.
Supply support for ISO7340FCDW 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 isolation, power management, and signal chain solutions.
The ISO734x family was designed specifically for robust industrial automation applications demanding high EMC immunity, extended temperature operation (–40°C to +125°C), and safety-certified galvanic isolation in compact SOIC packages.
FAQ
What is the default output state of the ISO7340FCDW during power-up or input loss?
The ISO7340FCDW features a default-low output configuration due to the 'F' suffix. When VCCI or input signals are absent or invalid, all four output channels (OUTA–OUTD) drive low. This behavior is confirmed in the Device Functional Modes section of the datasheet and ensures fail-safe operation in power-supply supervision and motor-control enable paths. The ISO7340FCDW maintains this state until valid input transitions occur and both VCCI and VCCO are within operating range.
Does the ISO7340FCDW support level translation between 3.3-V and 5-V logic domains?
Yes, the ISO7340FCDW supports bidirectional level translation: VCCI can operate from 3 V to 5.5 V independently of VCCO, which also accepts 3 V to 5.5 V. This allows direct interfacing between a 3.3-V microcontroller and a 5-V RS-485 transceiver without external level shifters. Input thresholds remain TTL-compatible across both supply ranges, and output drive strength (±4 mA) is maintained regardless of VCCI/VCCO combination. This capability is explicitly verified in Section 7.3 (Recommended Operating Conditions) and Figure 14 of the ISO7340FCDW datasheet.
What safety certifications apply to the ISO7340FCDW?
The ISO7340FCDW holds multiple internationally recognized safety certifications: UL 1577 (3000 VRMS reinforced isolation), DIN V VDE V 0884-10 (4242 VPK basic isolation), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and CQC GB4943.1-2011. These cover working voltage ratings up to 250 VRMS (reinforced) and transient overvoltage tolerance up to 4242 VPK. Certification documentation, including file numbers E181974 and 40016131, is published in Section 7.7 of the official TI datasheet for ISO7340FCDW.
How does the integrated noise filter in the ISO7340FCDW improve system reliability?
The ISO7340FCDW includes a factory-configured input noise filter that rejects transient pulses shorter than 40 ns-common in EFT events per IEC 61000-4-4. This eliminates the need for external RC filters on each input line, reducing PCB area and component count while improving immunity to fast transients in motor drives and factory automation. The filter is enabled by default and does not affect propagation delay or signaling rate. Its effectiveness is validated in system-level EMC testing documented in the ISO7340FCDW datasheet's EMC performance section.
Can the ISO7340FCDW be used in automotive applications?
The ISO7340FCDW is not AEC-Q200 qualified and is specified for industrial temperature range (–40°C to +125°C), not automotive-grade (–40°C to +150°C). While its electrical specs and isolation ratings meet many automotive subsystem requirements, TI does not endorse or guarantee its use in safety-critical automotive applications such as ADAS or powertrain control. For automotive designs, TI recommends the ISO774x-Q1 series, which undergoes full AEC-Q100 qualification and includes automotive-specific test reports. The ISO7340FCDW remains appropriate for non-safety automotive test equipment and charging infrastructure.
ISO7340FCDW 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:
- 4/0
- 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):
- 4.1ns
- 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
ISO7340FCDW FAQ
1.How can I place an order for ISO7340FCDW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7340FCDW 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 ISO7340FCDW reliable?
The price and inventory of ISO7340FCDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7340FCDW is usually 5 days.
3.What payment methods are accepted for ISO7340FCDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7340FCDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7340FCDW?
ISO7340FCDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7340FCDW 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 ISO7340FCDW?
For technical support, including ISO7340FCDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7340FCDW requirements.
6.How does Aetrix verify that ISO7340FCDW is sourced from the original manufacturer or authorized distributors?
All ISO7340FCDW 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 ISO7340FCDW meets industry standards.
7.What is the process for return or replacement of ISO7340FCDW?
All ISO7340FCDW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7340FCDW, 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 ISO7340FCDW part is unused and in its original packaging.
Return procedure for ISO7340FCDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7340FCDW Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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