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ISO7241MDWRG4 Equivalent & Substitute Parts
Part Overview
The ISO7241MDWRG4 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 active equivalent and substitute components that maintain functional compatibility within system designs. Substitute parts are selected based on matching or exceeding critical electrical parameters including isolation voltage, channel configuration, data rate, and common mode transient immunity.
Substiute Parts
Key Parameters
| Parameter | ISO7241MDWRG4 |
|---|---|
| Manufacturer | Texas Instruments |
| Technology | Capacitive Coupling |
| Number of Channels | 4 |
| Inputs - Side 1/Side 2 | 3/1 |
| 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) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following critical parameters:
Primary Matching Criteria:
- Isolation voltage: 2500Vrms minimum
- Number of channels: 4 channels
- Package type: 16-SOIC form factor
- Channel configuration: Unidirectional
- Operating temperature range: Must encompass -40°C to 125°C or be compatible with application requirements
Secondary Compatibility Factors:
- Data rate: 150Mbps or higher
- Common mode transient immunity: 25kV/µs or higher
- Supply voltage range: Must overlap with 3.15V ~ 5.5V
- Propagation delay: Lower values acceptable
- RoHS compliance: ROHS3 preferred for regulatory alignment
Substitutes are grouped into two categories: direct manufacturer equivalents (same base part number, different packaging or temperature rating) and parametric equivalents (different manufacturers or technologies meeting or exceeding electrical specifications).
Parameter Comparison
| Part Number | Manufacturer | Technology | Channels | Inputs (1/2) | Isolation (Vrms) | CMTI (kV/µs) | Data Rate (Mbps) | tpLH/tpHL (ns) | Supply (V) | Temp (°C) | Package | RoHS | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISO7241MDWRG4 | Texas Instruments | Capacitive | 4 | 3/1 | 2500 | 25 | 150 | 23, 23 | 3.15-5.5 | -40 to 125 | 16-SOIC (7.50mm) | ROHS3 | Discontinued |
| ISO7241MDWR | Texas Instruments | Capacitive | 4 | 3/1 | 2500 | 25 | 150 | 23, 23 | 3.15-5.5 | -40 to 125 | 16-SOIC (7.50mm) | ROHS3 | Active |
| ISO7230MDWR | Texas Instruments | Capacitive | 3 | 3/0 | 2500 | 25 | 150 | 23, 23 | 3.15-5.5 | -40 to 125 | 16-SOIC (7.50mm) | ROHS3 | Last Time Buy |
| IL 715 | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (7.50mm) | Non-compliant | Active |
| IL 715-3 | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (3.90mm) | Non-compliant | Active |
| IL 715-3E | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (3.90mm) | ROHS3 | Active |
| IL 715-3ETR7 | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (3.90mm) | ROHS3 | Active |
| IL 715ETR13 | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (7.50mm) | ROHS3 | Active |
| IL 715T | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 125 | 16-SOIC (7.50mm) | Non-compliant | Active |
| IL 715T-3E | NVE Corp | GMR | 4 | 4/0 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 125 | 16-SOIC (3.90mm) | ROHS3 | Active |
| IL 716 | NVE Corp | GMR | 4 | 2/2 | 2500 | 100 | 110 | 15, 15 | 3-5.5 | -40 to 100 | 16-SOIC (7.50mm) | Non-compliant | Active |
Engineering Selection Recommendations
Tier 1 - Direct Equivalent (Recommended Primary Choice):
ISO7241MDWR is the direct functional equivalent to ISO7241MDWRG4. Both parts share identical electrical specifications, channel configuration (3/1 input distribution), and operating parameters. ISO7241MDWR is currently active with 25,200 units in stock, providing supply continuity. Both maintain ROHS3 compliance and identical package dimensions (16-SOIC, 7.50mm width). This substitution requires no design modification.
Tier 2 - Parametric Equivalent (Channel Reduction):
ISO7230MDWR is a parametric equivalent with reduced channel count (3 channels vs. 4 channels). This part is suitable only for applications requiring 3 or fewer isolated channels. It maintains identical isolation voltage, data rate, CMTI, and supply specifications. Product status is Last Time Buy, indicating limited future availability.
Tier 3 - Alternative Technology (GMR-Based Isolators):
IL 715 series parts (NVE Corp IsoLoop) provide 4-channel isolation with superior CMTI (100kV/µs vs. 25kV/µs) and faster propagation delay (15ns vs. 23ns). These parts use GMR technology instead of capacitive coupling. Key considerations:
- IL 715, IL 715T, IL 716: Standard 7.50mm package width, compatible with ISO7241MDWRG4 footprint
- IL 715-3, IL 715-3E, IL 715-3ETR7, IL 715T-3E: Narrow 3.90mm package width, requires PCB layout verification
- IL 715T and IL 715T-3E: Extended temperature range (-40°C to 125°C) matches original part
- IL 715-3E, IL 715-3ETR7, IL 715ETR13, IL 715T-3E: ROHS3 compliant variants available
- IL 715, IL 715T, IL 716: RoHS non-compliant; verify regulatory requirements before selection
- IL 716: Different input distribution (2/2 vs. 3/1); verify channel routing compatibility
Compliance Considerations:
For applications requiring ROHS3 compliance, select ISO7241MDWR, ISO7230MDWR, IL 715-3E, IL 715-3ETR7, IL 715ETR13, or IL 715T-3E. Non-compliant variants (IL 715, IL 715T, IL 716) are suitable only where regulatory exemptions apply.
Temperature Range:
Original part and ISO7241MDWR support -40°C to 125°C. Most NVE IL 715 variants support -40°C to 100°C. IL 715T and IL 715T-3E extend to -40°C to 125°C for full temperature compatibility.
Frequently Asked Questions (FAQ)
Q: Can ISO7241MDWR directly replace ISO7241MDWRG4 without design changes?
A: Yes. ISO7241MDWR is the direct equivalent with identical electrical specifications, channel configuration, package dimensions, and operating temperature range. No PCB layout or firmware modifications are required.
Q: What is the difference between ISO7241MDWR and ISO7230MDWR?
A: ISO7230MDWR has 3 channels instead of 4, with input distribution of 3/0 versus 3/1. Use ISO7230MDWR only if your application requires 3 or fewer isolated channels. All other electrical parameters remain identical.
Q: Why do NVE IL 715 series parts have higher CMTI than the original ISO7241MDWRG4?
A: IL 715 series uses GMR (Giant Magnetoresistive) isolation technology, which inherently provides superior common mode transient immunity (100kV/µs) compared to capacitive coupling (25kV/µs). This is a technology advantage, not a limitation.
Q: Are IL 715-3 and IL 715-3E interchangeable?
A: IL 715-3 and IL 715-3E are functionally identical but differ in RoHS compliance. IL 715-3E is ROHS3 compliant; IL 715-3 is not. Select IL 715-3E for applications requiring regulatory compliance.
Q: What is the significance of the package width difference (7.50mm vs. 3.90mm) in IL 715 variants?
A: Package width affects PCB footprint and board layout. IL 715-3 series (3.90mm) has a narrower footprint than IL 715 standard variants (7.50mm). Verify PCB layout compatibility before substitution. The 7.50mm width variants (IL 715, IL 715T, IL 715ETR13) maintain footprint compatibility with the original ISO7241MDWRG4.
Q: Can I use IL 716 as a substitute for ISO7241MDWRG4?
A: IL 716 is electrically compatible but has different channel input distribution (2/2 vs. 3/1). Substitution is possible only if your circuit design can accommodate bidirectional channel routing on both sides of the isolator. Verify signal flow requirements before selection.
Q: Which substitute part offers the best long-term availability?
A: ISO7241MDWR has the highest inventory (25,200 units) and active product status, ensuring long-term availability. NVE IL 715 series variants are also active. ISO7230MDWR is in Last Time Buy status, indicating limited future supply.
Q: Do all substitute parts support the same supply voltage range?
A: ISO7241MDWR supports 3.15V ~ 5.5V (identical to original). NVE IL 715 series supports 3V ~ 5.5V, which overlaps but has a slightly lower minimum. Verify your power supply specifications for compatibility.
Q: What is the temperature rating difference between IL 715 and IL 715T variants?
A: IL 715 standard variants support -40°C to 100°C. IL 715T variants extend to -40°C to 125°C, matching the original ISO7241MDWRG4 temperature range. Select IL 715T for applications requiring full temperature coverage.
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