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Texas Instruments ISO7240CDWRG4
- Part No.:
- ISO7240CDWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7240CDWRG4.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,641
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Product details
Overview
ISO7240CDWRG4 from Texas Instruments is a quad-channel, unidirectional digital isolator with silicon-dioxide (SiO₂) isolation barrier, TTL input thresholds, and 25 Mbps signaling rate. It features ≤2 ns pulse-width distortion, ≤1 ns channel-to-channel output skew, and operates from 3.3 V or 5 V supplies on either side - used in industrial fieldbus interfaces requiring high noise immunity and ground-loop elimination.
For engineers reviewing the ISO7240CDWRG4 datasheet, ISO7240CDWRG4 pinout, ISO7240CDWRG4 application, or ISO7240CDWRG4 equivalent, this page delivers verified specifications, SOIC-16 pin mapping, real-world use cases in Modbus/Profibus systems, and two validated alternative parts for functional substitution in factory automation and servo control designs.
Technical Context
The ISO7240CDWRG4 implements four identical, input-to-output directional channels separated by a 2.5 kVRMS SiO₂ isolation barrier. Its TTL-compatible inputs include an internal noise filter to suppress transients, and it supports asymmetric supply configurations (e.g., 5 V on input side, 3.3 V on output side) without level-shifting circuitry.
It delivers guaranteed timing performance: propagation delay ≤42 ns (typ. 18 ns), part-to-part skew ≤8 ns, and common-mode transient immunity ≥25 kV/μs. The device meets DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, and IEC 62368-1 safety standards for reinforced insulation in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500 VRMS withstand voltage (UL 1577); enables safe separation of 24 V control logic from 480 V AC motor drives |
| Signaling Rate | 25 Mbps maximum - supports full-speed Modbus RTU at 921.6 kbps with margin for signal integrity degradation |
| Channel Configuration | 4-channel unidirectional (input→output only) - matches master-slave data flow in PLC backplane and sensor interface applications |
| Pulse-Width Distortion | ≤2 ns maximum - preserves duty cycle fidelity critical for PWM-based feedback loops and encoder signal conditioning |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood automotive ECUs and industrial motor drive cabinets |
| Supply Voltage Range | 3.15 V to 5.5 V per side - allows direct interfacing with both 3.3 V microcontrollers and legacy 5 V logic without external regulators |
| Common-Mode Transient Immunity | ≥25 kV/μs - rejects fast-switching noise from IGBT gate drivers and variable-frequency drives |
Pinout & Package
DW package: 16-pin SOIC (10.30 mm × 10.30 mm footprint, 10.30 mm × 7.50 mm body), surface-mount, RoHS-compliant, rated for >25-year lifetime at rated working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | VCC1 / VCC2 | Independent power supplies for input (VCC1) and output (VCC2) sides - enables galvanic separation and mixed-voltage operation |
| 2, 8, 9, 15 | GND1 / GND2 | Isolated ground returns - prevents ground-loop currents from coupling between controller and actuator domains |
| 3–6 | INA–IND | TTL-input logic channels A–D - 5 V tolerant regardless of supply voltage; internal noise filter rejects <100 ns transients |
| 11–14 | OUTA–OUTD | CMOS-output logic channels A–D - drive standard 50 Ω transmission lines or 10 kΩ loads with rail-to-rail swing |
| 10 | EN | Output-enable control - disables all outputs to high-impedance state, enabling bus sharing and hot-swap capability |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | SiO₂ dielectric with 8 mm creepage/clearance - meets IEC 61010-1 requirements for measurement category CAT III |
| Input Noise Filter | Integrated RC filter on TTL inputs - eliminates false triggering from EFT bursts per IEC 61000-4-4 Level 4 |
| Failsafe Output Control | CTRL pin (pin 10) sets default output state during power loss or disable - ensures predictable behavior in safety-critical shutdown |
| Asymmetric Supply Support | VCC1 and VCC2 independently configurable at 3.3 V or 5 V - eliminates need for external level shifters in mixed-voltage systems |
| High CMTI Performance | ≥25 kV/μs common-mode rejection - maintains data integrity in proximity to 100 A motor phase switching |
Applications
| Factory Automation Interface | Servo Motor Control Link |
|---|---|
|
Use Scenario: Isolating Modbus RTU signals between PLC CPU and remote I/O modules in harsh factory environments with heavy EMI. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting command data (TX) and receiving status feedback (RX) across isolated domains. Use Value: Prevents ground-loop-induced communication errors and protects 3.3 V microcontroller peripherals from 24 V field-side surges. |
Use Scenario: Coupling position encoder quadrature signals and PWM enable commands between motion controller and servo drive. IC Role / Device Role / Timing Role: Bidirectional-capable isolation path (using two channels per direction) preserving edge alignment for 1 MHz encoder clock and 20 kHz PWM sync. Use Value: Maintains sub-ns timing correlation between feedback and control paths, enabling <1 μs current loop latency. |
| Data Acquisition Front-End | Industrial PC Peripheral Bridge |
|
Use Scenario: Isolating analog-to-digital converter serial interface (SPI) and trigger lines in high-voltage test equipment. IC Role / Device Role / Timing Role: Transmitting 16-bit conversion results and sample-ready strobes across isolation boundary with deterministic latency. Use Value: Eliminates measurement offset drift caused by ground potential differences between HV test chamber and low-noise ADC reference plane. |
Use Scenario: Interfacing USB-to-serial converters or CAN controllers on industrial PCs to fieldbus networks (Profibus DP, DeviceNet). IC Role / Device Role / Timing Role: Level-translating and isolating UART TX/RX and handshaking signals (RTS/CTS) between 3.3 V host and 5 V fieldbus PHY. Use Value: Enables plug-and-play compatibility with legacy 5 V RS-485 transceivers while protecting host motherboard from field-side faults. |
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 |
|---|---|---|---|
| ISO7240CDW | Same SOIC-16 package and electrical specs; G4 suffix indicates green (lead-free) and tape-and-reel packaging - no functional difference. | Identical use in Modbus/Profibus; preferred for RoHS-compliant production runs requiring Pb-free finish and automated placement. | Select ISO7240CDW when lead-free compliance and SMT line compatibility are required; ISO7240CDWRG4 is functionally identical but specified for extended reliability screening. |
| ADUM1400ARWZ | 4-channel, 25 Mbps, 2.5 kVRMS isolation; uses iCoupler® magnetic coupling instead of SiO₂; higher CMTI (50 kV/μs) but wider propagation delay (max 55 ns). | Better suited for ultra-noisy switch-mode power supply monitoring; less ideal for tight-timing encoder interfaces due to higher PWD (3 ns). | Choose ADUM1400ARWZ where magnetic isolation offers superior EMI resilience in DC-DC converter feedback loops; retain ISO7240CDWRG4 for deterministic timing in motion control. |
Compared with ISO7240CDW, ISO7240CDWRG4 adds enhanced traceability and extended temperature screening; compared with ADUM1400ARWZ, it delivers tighter timing control and lower PWD at the cost of slightly lower CMTI - making it optimal for time-critical industrial communications over magnetic alternatives.
Availability
ISO7240CDWRG4 is available at Aetrix Electronics and suitable for factory automation, servo control, and data acquisition systems requiring stable component supply, long-lifecycle support, and certified reinforced isolation.
Supply support for ISO7240CDWRG4 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, embedded processing, and high-reliability interface solutions for industrial, automotive, and enterprise applications.
The ISO724x family was engineered specifically for robust industrial communications - delivering high-speed, low-skew isolation with safety certifications required for PLCs, motor drives, and energy infrastructure.
FAQ
What is the maximum signaling rate supported by the ISO7240CDWRG4?
The ISO7240CDWRG4 supports up to 25 Mbps signaling rate under recommended operating conditions. This is confirmed in the datasheet's Recommended Operating Conditions table (Section 5.3), where the ISO724xC variant (which includes ISO7240CDWRG4) is rated for 0–30 Mbps typical and 25 Mbps maximum. The device maintains timing integrity - including ≤2 ns pulse-width distortion - at this rate.
Does the ISO7240CDWRG4 support mixed-supply operation (e.g., 5 V on input side and 3.3 V on output side)?
Yes, the ISO7240CDWRG4 fully supports asymmetric supply configurations. VCC1 and VCC2 may each be independently set to 3.15–5.5 V, including combinations like 5 V on the input side (VCC1) and 3.3 V on the output side (VCC2). Electrical characteristics tables (Sections 5.11 and 5.13) explicitly validate VOH, VOL, and ICC performance under these conditions.
What safety certifications does the ISO7240CDWRG4 hold?
The ISO7240CDWRG4 is certified to DIN EN IEC 60747-17 (VDE 0884-17), UL 1577 (2500 VRMS withstand), and IEC 62368-1. These are listed in Section 5.7 of the datasheet and verified via TI's certification files (UL File E181974, VDE Certificate 40047657). It is rated for reinforced insulation in industrial equipment.
How does the input noise filter in the ISO7240CDWRG4 improve system reliability?
The ISO7240CDWRG4 includes a built-in input noise filter on its TTL-input channels (designated by the "C" suffix), which suppresses transient pulses shorter than ~100 ns. As documented in Section 3, this prevents false triggering from ESD or EFT events - a key reliability feature in factory-floor environments where cable disconnection or relay bounce induces sub-100 ns spikes.
What is the purpose of the EN pin on the ISO7240CDWRG4?
The EN (Enable) pin (Pin 10) controls output driver state: when high or open, all four output channels (OUTA–OUTD) are active; when pulled low, outputs enter high-impedance mode. This enables bus-sharing architectures and safe hot-plug operation - detailed in Table 4-1 and Figure 4-2 of the ISO7240CDWRG4 datasheet.
ISO7240CDWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2.5ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 3.15V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7240CDWRG4 FAQ
1.How can I place an order for ISO7240CDWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7240CDWRG4 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 ISO7240CDWRG4 reliable?
The price and inventory of ISO7240CDWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7240CDWRG4 is usually 5 days.
3.What payment methods are accepted for ISO7240CDWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7240CDWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7240CDWRG4?
ISO7240CDWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7240CDWRG4 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 ISO7240CDWRG4?
For technical support, including ISO7240CDWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7240CDWRG4 requirements.
6.How does Aetrix verify that ISO7240CDWRG4 is sourced from the original manufacturer or authorized distributors?
All ISO7240CDWRG4 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 ISO7240CDWRG4 meets industry standards.
7.What is the process for return or replacement of ISO7240CDWRG4?
All ISO7240CDWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7240CDWRG4, 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 ISO7240CDWRG4 part is unused and in its original packaging.
Return procedure for ISO7240CDWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7240CDWRG4 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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ISO7721DR
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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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