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Texas Instruments ISO7242MDW
- Part No.:
- ISO7242MDW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7242MDW.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
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Product details
Overview
ISO7242MDW from Texas Instruments is a quad-channel digital isolator with two input-to-output and two output-to-input signal paths, built on silicon-dioxide (SiO₂) isolation barrier technology. It supports 150 Mbps signaling rate, exhibits ≤1 ns channel-to-channel output skew and ≤2 ns pulse-width distortion, and operates across –40°C to +125°C for industrial factory automation interfaces requiring bidirectional data isolation.
For engineers reviewing the ISO7242MDW datasheet, ISO7242MDW pinout, ISO7242MDW application, or ISO7242MDW equivalent, this page delivers verified electrical specs, SOIC-16 pin mapping, safety certifications (VDE 0884-17, UL 1577), dual-supply operation (3.3 V/5 V), and real-world use cases in Modbus/Profibus bus isolation and servo control interfaces.
Technical Context
The ISO7242MDW implements a 2×2 bidirectional channel configuration-channels A/B flow input-to-output, while C/D flow output-to-input-enabling full-duplex isolated communication without external direction control logic. Its CMOS VCC/2 input thresholds (M-suffix) eliminate input noise filtering and associated propagation delay, delivering faster edge response than C-suffix variants.
It features independent enable controls (EN1 on pin 7, EN2 on pin 10), allowing selective activation of each side's outputs, and achieves ≥25-year lifetime at rated working voltage per IEC 60747-17 lifetime projection models. Common-mode transient immunity exceeds 25 kV/μs, supporting robust operation in noisy motor-drive and PLC environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 150 Mbps maximum - enables high-speed serial links such as isolated RS-485 transceiver control or real-time encoder feedback. |
| Channel Configuration | 2 forward + 2 reverse channels - supports bidirectional protocols like Modbus RTU or half-duplex SPI over isolation barrier. |
| Propagation Delay | 8–23 ns (typ/max) - ensures tight timing alignment in servo position loops and time-critical industrial Ethernet PHY isolation. |
| Channel-to-Channel Skew | ≤1 ns maximum - preserves phase integrity across multi-bit parallel interfaces (e.g., isolated GPIO banks). |
| Isolation Voltage | 2500 VRMS withstand (UL 1577), 560 VPK repetitive peak (VDE 0884-17) - meets reinforced insulation requirements for 250 VRMS mains-connected equipment. |
| Supply Flexibility | 3.3 V or 5 V on either side, independently - allows interfacing with mixed-voltage systems (e.g., 3.3 V MCU + 5 V sensor bus). |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood automotive ECUs, motor drives, and industrial PLC backplanes. |
Pinout & Package
DW package: 16-pin SOIC (10.30 mm × 10.30 mm body size, 10.30 mm × 7.50 mm footprint), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | VCC1 / VCC2 | Independent power supplies for input-side (VCC1) and output-side (VCC2); each accepts 3.15–5.5 V. |
| 2, 8, 9, 15 | GND1 / GND2 | Separate ground returns for isolation barrier sides; mandatory physical separation on PCB to maintain creepage/clearance. |
| 3, 4, 12, 11 | INA / INB / OUTC / IND | Input A/B (side 1), Output C/D (side 2) - defines 2×2 bidirectional signal flow per ISO7242x family architecture. |
| 5, 6, 13, 14 | OUTA / OUTB / INC / OUTD | Output A/B (side 2), Input C/D (side 1) - completes full 4-channel cross-bar routing across isolation barrier. |
| 7, 10 | EN1 / EN2 | Active-high output enables for side-1 (pins 11–14) and side-2 (pins 3–6); open-drain compatible with pull-up resistors. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS input thresholds | VCC/2 switching point with no input noise filter - reduces propagation delay by ~3 ns vs. TTL-threshold C-suffix parts, critical for high-frequency clock forwarding. |
| Dual independent output enables | EN1 (pin 7) and EN2 (pin 10) allow per-side output disable - enables dynamic power gating and safe state management during system reset sequences. |
| High CMTI | ≥25 kV/μs common-mode transient immunity - suppresses false triggering in high-di/dt environments like IGBT gate drivers and VFDs. |
| Reinforced isolation certification | VDE 0884-17 (DIN EN IEC 60747-17) and UL 1577 - qualifies for safety-critical applications up to 250 VRMS working voltage with single-barrier reliability. |
| Low power consumption | ICC1 = 6–10 mA / ICC2 = 6–10 mA (quiescent, 3.3 V/3.3 V) - enables thermally constrained designs in sealed enclosures or multi-isolator modules. |
Applications
| Modbus/Profibus Bus Isolation | Servo Motor Control Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in programmable logic controllers to prevent ground loop currents between field devices and control cabinets. IC Role / Device Role / Timing Role: Bidirectional signal translator across isolation barrier, handling both command (master→slave) and response (slave→master) traffic on same physical bus. Use Value: Eliminates communication errors caused by >1 V ground potential differences while maintaining 150 Mbps timing margins for fast polling cycles. |
Use Scenario: Isolating PWM and feedback signals (encoder A/B/Z, Hall sensors) between microcontroller and motor gate driver stage. IC Role / Device Role / Timing Role: Low-skew, bidirectional isolator preserving edge alignment between position feedback and PWM update timing. Use Value: Enables sub-microsecond synchronization of current-loop updates and position capture, improving torque ripple suppression. |
| Data Acquisition System Front-End | Industrial Ethernet PHY Isolation |
|
Use Scenario: Protecting ADC inputs and digital control lines in isolated analog input modules used in SCADA remote terminal units. IC Role / Device Role / Timing Role: Isolating serial interface (SPI/I²C) and GPIO control lines between isolated analog front-end and host processor. Use Value: Prevents noise coupling from high-voltage sensor inputs into low-noise measurement circuits, preserving 16-bit effective resolution. |
Use Scenario: Isolating MDIO/MDC and RGMII signals between Ethernet MAC and PHY in DIN-rail mounted IoT gateways. IC Role / Device Role / Timing Role: High-speed, low-jitter isolator for clock and data lanes in 100BASE-TX PHY interfaces. Use Value: Maintains <1 ns eye jitter at 125 MHz, ensuring compliance with IEEE 802.3u timing budgets and link stability. |
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 |
|---|---|---|---|
| ISO7242CDW | TTL input thresholds with input noise filter; 18–42 ns propagation delay; 25 Mbps max rate. | Better noise immunity in EMI-heavy environments but unsuitable for >25 Mbps timing-critical links. | Select ISO7242CDW when system noise exceeds 25 kV/μs or when legacy 25 Mbps Modbus RTU dominates. |
| ADUM2402BRWZ | 2/2 bidirectional configuration; 25 Mbps; 50 kV/μs CMTI; 2.5 kVRMS isolation; different pinout (SOIC-16, but non-compatible). | Larger timing margin for ultra-noisy applications but lower speed limits performance in high-throughput data acquisition. | Choose ADUM2402BRWZ only if CMTI >40 kV/μs is required and 25 Mbps suffices; verify PCB layout rework for pin mismatch. |
Compared with ISO7242CDW and ADUM2402BRWZ, ISO7242MDW uniquely balances 150 Mbps speed, 1 ns skew, and CMOS threshold responsiveness-making it optimal for next-generation servo drives and isolated high-speed serial buses where latency and bandwidth are co-constrained.
Availability
ISO7242MDW is available at Aetrix Electronics and suitable for factory automation, servo control interfaces, and data acquisition systems requiring stable component supply, long-lifecycle assurance, and certified reinforced isolation.
Supply support for ISO7242MDW 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 components for industrial, automotive, and communications markets.
The ISO724x family was designed specifically for high-speed, safety-certified digital signal isolation in harsh industrial environments-emphasizing low skew, high CMTI, and long-term reliability under continuous voltage stress.
FAQ
What is the maximum signaling rate supported by ISO7242MDW?
The ISO7242MDW supports up to 150 Mbps signaling rate under recommended operating conditions. This is validated for both 3.3 V and 5 V supply configurations, with typical eye-pattern jitter of 1 ns peak-to-peak at 150 Mbps NRZ input. The M-suffix denotes the high-speed variant optimized for this performance tier, distinct from the 25 Mbps C-suffix versions.
Does ISO7242MDW support mixed-voltage operation between input and output sides?
Yes, ISO7242MDW supports independent 3.3 V or 5 V supplies on VCC1 (input side) and VCC2 (output side) simultaneously. For example, it can interface a 3.3 V microcontroller (VCC1 = 3.3 V) to a 5 V RS-485 transceiver (VCC2 = 5 V), with all I/O pins tolerant to 5 V regardless of supply level-enabling seamless level-shifting without external circuitry.
What safety certifications apply to ISO7242MDW?
ISO7242MDW carries DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, and IEC 62368-1 certifications. These validate its reinforced insulation barrier for working voltages up to 250 VRMS, with 2500 VRMS withstand voltage (1 minute) and 560 VPK repetitive peak isolation rating-meeting requirements for industrial equipment safety standards including IEC 61010-1.
How does the ISO7242MDW pinout differ from ISO7240x or ISO7241x variants?
ISO7242MDW uses a 2×2 bidirectional pinout: INA/INB (pins 3/4) and OUTC/IND (pins 12/11) on side 1; OUTA/OUTB (pins 14/13) and INC/OUTD (pins 5/6) on side 2. This differs from ISO7240x (all 4 channels unidirectional) and ISO7241x (3+1 asymmetric), requiring specific PCB layout to match the cross-bar signal routing defined in Figure 4-4 of the datasheet.
What is the purpose of EN1 and EN2 pins on ISO7242MDW?
EN1 (pin 7) and EN2 (pin 10) are active-high output enable terminals controlling side-1 (pins 11–14) and side-2 (pins 3–6) outputs respectively. When pulled low, they place corresponding outputs in high-impedance state-enabling safe hot-swap sequencing, power-down isolation, and dynamic channel gating without disrupting the isolation barrier integrity.
ISO7242MDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 23ns, 23ns
- Pulse Width Distortion (Max):
- 2ns
- 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
ISO7242MDW FAQ
1.How can I place an order for ISO7242MDW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7242MDW 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 ISO7242MDW reliable?
The price and inventory of ISO7242MDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7242MDW is usually 5 days.
3.What payment methods are accepted for ISO7242MDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7242MDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7242MDW?
ISO7242MDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7242MDW 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 ISO7242MDW?
For technical support, including ISO7242MDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7242MDW requirements.
6.How does Aetrix verify that ISO7242MDW is sourced from the original manufacturer or authorized distributors?
All ISO7242MDW 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 ISO7242MDW meets industry standards.
7.What is the process for return or replacement of ISO7242MDW?
All ISO7242MDW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7242MDW, 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 ISO7242MDW part is unused and in its original packaging.
Return procedure for ISO7242MDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7242MDW Tags
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