ISO7240MDWRG4 Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7240MDWRG4 is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation, 4 channels, and 150Mbps data rate in a 16-SOIC package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and production requirements. Alternative parts must maintain functional compatibility across isolation voltage, channel configuration, data rate, and package specifications.

Key Parameters

Parameter	ISO7240MDWRG4
Manufacturer	Texas Instruments
Technology	Capacitive Coupling
Number of Channels	4
Voltage - Isolation	2500Vrms
Common Mode Transient Immunity (Min)	25kV/µs
Data Rate	150Mbps
Propagation Delay tpLH / tpHL (Max)	23ns / 23ns
Voltage - Supply	3.15V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation Voltage: Must equal or exceed 2500Vrms
Number of Channels: Must provide minimum 4 channels with unidirectional configuration
Package Type: Must be 16-SOIC form factor (mechanical compatibility with PCB layout)
Data Rate: Must support minimum 150Mbps operation
Common Mode Transient Immunity: Must meet or exceed 25kV/µs
Supply Voltage Range: Must accommodate 3.15V ~ 5.5V operation
Operating Temperature: Must support -40°C ~ 125°C range

Substitute parts are grouped into three categories: parametric equivalents (identical specifications), manufacturer-recommended alternatives (different technology platforms with equivalent functional performance), and compatible variants (same base product with different packaging or temperature ratings).

Parameter Comparison

Part Number	Manufacturer	Technology	Channels	Isolation (Vrms)	CMTI (kV/µs)	Data Rate (Mbps)	tpLH/tpHL (ns)	Supply (V)	Temp Range (°C)	Package	Status
ISO7240MDWRG4	Texas Instruments	Capacitive	4	2500	25	150	23/23	3.15-5.5	-40 to 125	16-SOIC (7.50mm)	Discontinued
ISO7240MDWR	Texas Instruments	Capacitive	4	2500	25	150	23/23	3.15-5.5	-40 to 125	16-SOIC (7.50mm)	Active
ISO7230MDWR	Texas Instruments	Capacitive	3	2500	25	150	23/23	3.15-5.5	-40 to 125	16-SOIC (7.50mm)	Last Time Buy
ADUM1400CRWZ-RL	Analog Devices Inc.	Magnetic	4	2500	25	90	32/32	2.7-5.5	-40 to 105	16-SOIC (7.50mm)	Active
IL 715	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 100	16-SOIC (7.50mm)	Active
IL 715-3	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 100	16-SOIC (3.90mm)	Active
IL 715-3E	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 100	16-SOIC (3.90mm)	Active
IL 715-3ETR7	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 100	16-SOIC (3.90mm)	Active
IL 715ETR13	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 100	16-SOIC (7.50mm)	Active
IL 715T	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 125	16-SOIC (7.50mm)	Active
IL 715T-3E	NVE Corp	GMR	4	2500	100	110	15/15	3-5.5	-40 to 125	16-SOIC (3.90mm)	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent)

ISO7240MDWR is the primary direct replacement. This part maintains identical electrical specifications, isolation voltage, channel count, data rate, and operating temperature range. The part is currently in active production status with 6413 units in stock, ensuring supply continuity. Both parts use capacitive coupling technology and are ROHS3 compliant.

Alternative with Channel Reduction

ISO7230MDWR provides 3-channel isolation instead of 4 channels. This part is suitable only for applications requiring fewer isolated channels. It maintains equivalent isolation voltage, data rate, and operating temperature. Product status is Last Time Buy, indicating limited future availability.

Cross-Manufacturer Alternatives

ADUM1400CRWZ-RL (Analog Devices iCoupler series) uses magnetic coupling technology and provides 4-channel isolation at 2500Vrms. Data rate is reduced to 90Mbps, and maximum operating temperature is limited to 105°C. This part is ROHS3 compliant with MSL 1 rating. Supply voltage range extends to 2.7V minimum, providing broader compatibility.

IL 715 series (NVE Corp IsoLoop) uses GMR (Giant Magnetoresistive) technology with superior common mode transient immunity (100kV/µs versus 25kV/µs). Data rate is 110Mbps. Operating temperature maximum is 100°C for standard variants, with IL 715T and IL 715T-3E extending to 125°C. Package width variants exist: 7.50mm (standard SOIC) and 3.90mm (narrow SOIC). RoHS compliance varies by variant. MSL rating is 1 (Unlimited).

Compliance Considerations

All Texas Instruments parts (ISO7240MDWR, ISO7230MDWR) are ROHS3 compliant. Analog Devices ADUM1400CRWZ-RL is ROHS3 compliant. NVE IL 715 variants show mixed RoHS status: IL 715 and IL 715T are non-compliant; IL 715-3E, IL 715-3ETR7, IL 715ETR13, and IL 715T-3E are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can ISO7230MDWR replace ISO7240MDWRG4 in all applications?

A: No. ISO7230MDWR provides only 3 isolated channels versus 4 channels in the original part. Use this substitute only if your application requires 3 or fewer isolated channels. All other electrical parameters remain equivalent.

Q: What is the primary difference between capacitive and magnetic coupling technologies in these isolators?

A: The ISO7240MDWRG4 uses capacitive coupling (Texas Instruments), while ADUM1400CRWZ-RL uses magnetic coupling (Analog Devices). Both achieve 2500Vrms isolation. Capacitive coupling typically offers higher data rates (150Mbps vs 90Mbps in this case). Magnetic coupling provides lower supply voltage operation (2.7V minimum).

Q: Why do NVE IL 715 variants show different package widths (7.50mm vs 3.90mm)?

A: Package width affects PCB footprint and board layout compatibility. The 7.50mm width matches standard SOIC spacing; the 3.90mm width is a narrow variant. Electrical performance is identical. Verify your PCB layout supports the selected package width before substitution.

Q: Which substitute offers the best common mode transient immunity?

A: NVE IL 715 series parts specify 100kV/µs CMTI, compared to 25kV/µs for the original ISO7240MDWRG4. This superior performance is beneficial in high-noise environments with fast voltage transitions across the isolation barrier.

Q: Are all substitute parts currently available?

A: Texas Instruments ISO7240MDWR is active with 6413 units in stock. NVE IL 715 variants are active with inventory ranging from 658 to 8807 units. Analog Devices ADUM1400CRWZ-RL is active with 35832 units in stock. ISO7230MDWR is Last Time Buy status with 1319 units available.

Q: What is the temperature operating range limitation for NVE IL 715 standard variants?

A: Standard IL 715, IL 715-3, IL 715-3E, and IL 715ETR13 operate to 100°C maximum. IL 715T and IL 715T-3E extend operation to 125°C, matching the original ISO7240MDWRG4 specification. Select the -T variant if your application requires the full 125°C upper temperature limit.

Q: Does RoHS compliance affect substitution decisions?

A: Yes, if your application or supply chain requires RoHS3 compliance. ISO7240MDWR, ISO7230MDWR, ADUM1400CRWZ-RL, IL 715-3E, IL 715-3ETR7, IL 715ETR13, and IL 715T-3E are ROHS3 compliant. IL 715 and IL 715T are non-compliant. Verify compliance requirements before final part selection.

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