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ISO7241ADW Digital Isolator Equivalent & Substitute Parts
Part Overview
The ISO7241ADW is a general-purpose digital isolator manufactured by Texas Instruments, featuring 4000Vpk isolation voltage, 4-channel unidirectional configuration, and 1Mbps data rate in a 16-SOIC package. This device is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and long-term component availability for new production runs and system updates.
Substiute Parts
Key Parameters
| Parameter | ISO7241ADW |
|---|---|
| Manufacturer | Texas Instruments |
| Technology | Capacitive Coupling |
| Number of Channels | 4 |
| Voltage - Isolation | 4000Vpk |
| Data Rate | 1Mbps |
| Common Mode Transient Immunity (Min) | 25kV/µs |
| Package / Case | 16-SOIC (0.295", 7.50mm Width) |
| Voltage - Supply | 3.15V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C |
| RoHS Status | ROHS3 Compliant |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following critical parameters: isolation voltage rating, number of channels, channel configuration (inputs per side), package type, and operating temperature range. Parts are grouped into two categories based on substitution compatibility:
Category 1: Manufacturer Recommended Substitutes (Enhanced Performance)
- ISO6741DWR: Higher isolation voltage (5000Vrms vs 4000Vpk), higher data rate (50Mbps vs 1Mbps), improved CMTI (100kV/µs vs 25kV/µs). Same 4-channel, 3/1 input configuration and 16-SOIC package. Active product status ensures long-term availability.
Category 2: Parametric Equivalents (Same Isolation Class)
- ISO7231ADW: Identical isolation voltage (4000Vpk), same technology, same operating temperature range. Reduced to 3 channels with 2/1 input configuration. Same 16-SOIC package footprint.
Category 3: Alternative Technology Substitutes (GMR-Based)
- IL 715 series (IL 715, IL 715-3, IL 715-3E, IL 715-3ETR7, IL 715E, IL 715ETR13, IL 715T, IL 715T-3): Lower isolation voltage (2500Vrms), higher data rate (110Mbps), superior CMTI (100kV/µs). GMR technology instead of capacitive coupling. 4-channel configuration with 4/0 input distribution. Multiple package variants and RoHS compliance options available.
Parameter Comparison
| Part Number | Manufacturer | Technology | Channels | Isolation Voltage | Data Rate | CMTI (Min) | Package | Temp Range | Product Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|
| ISO7241ADW | Texas Instruments | Capacitive Coupling | 4 | 4000Vpk | 1Mbps | 25kV/µs | 16-SOIC (0.295", 7.50mm) | -40°C ~ 125°C | Last Time Buy | ROHS3 |
| ISO6741DWR | Texas Instruments | Capacitive Coupling | 4 | 5000Vrms | 50Mbps | 100kV/µs | 16-SOIC (0.295", 7.50mm) | -40°C ~ 125°C | Active | ROHS3 |
| ISO7231ADW | Texas Instruments | Capacitive Coupling | 3 | 4000Vpk | 1Mbps | 25kV/µs | 16-SOIC (0.295", 7.50mm) | -40°C ~ 125°C | Last Time Buy | ROHS3 |
| IL 715-3 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 110Mbps | 100kV/µs | 16-SOIC (0.154", 3.90mm) | -40°C ~ 100°C | Active | RoHS non-compliant |
| IL 715-3E | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 110Mbps | 100kV/µs | 16-SOIC (0.154", 3.90mm) | -40°C ~ 100°C | Active | ROHS3 |
| IL 715E | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 110Mbps | 100kV/µs | 16-SOIC (0.295", 7.50mm) | -40°C ~ 100°C | Active | ROHS3 |
| IL 715T | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 110Mbps | 100kV/µs | 16-SOIC (0.295", 7.50mm) | -40°C ~ 125°C | Active | RoHS non-compliant |
| IL 715T-3 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 110Mbps | 100kV/µs | 16-SOIC (0.154", 3.90mm) | -40°C ~ 125°C | Active | RoHS non-compliant |
Engineering Selection Recommendations
For Direct Replacement (Same Isolation Class, Active Status): ISO6741DWR is the primary recommended substitute. It maintains the same 4-channel, 3/1 input configuration and 16-SOIC (0.295", 7.50mm) package footprint. The device offers superior performance with 5000Vrms isolation, 50Mbps data rate, and 100kV/µs CMTI. Both parts are ROHS3 compliant and support the full -40°C to 125°C operating temperature range. Active product status ensures long-term availability and supply chain stability.
For Applications Requiring Extended Temperature Range: IL 715T and IL 715T-3 support -40°C to 125°C operating temperature, matching the ISO7241ADW specification. These GMR-based isolators provide 110Mbps data rate and 100kV/µs CMTI. IL 715T uses the standard 0.295" package width, while IL 715T-3 uses the narrower 0.154" variant. Note that these parts are RoHS non-compliant.
For RoHS3 Compliance with Extended Temperature: IL 715-3E provides ROHS3 compliance with active product status. However, the operating temperature range is limited to -40°C to 100°C, which is 25°C below the ISO7241ADW specification.
For Isolation Voltage Equivalence: ISO7231ADW maintains the same 4000Vpk isolation voltage and 1Mbps data rate as the original part. This option is suitable only for applications where the 4-channel configuration can be reduced to 3 channels with 2/1 input distribution. Product status is Last Time Buy, similar to the original part.
Frequently Asked Questions (FAQ)
Q: Can ISO6741DWR be used as a direct pin-for-pin replacement for ISO7241ADW? A: ISO6741DWR maintains the same 16-SOIC (0.295", 7.50mm) package and 4-channel, 3/1 input configuration. Pin compatibility requires verification against device datasheets. The higher performance specifications (5000Vrms isolation, 50Mbps data rate, 100kV/µs CMTI) make it functionally superior and suitable for most applications requiring ISO7241ADW performance.
Q: What is the key difference between IL 715 variants with different package widths? A: IL 715-3 and IL 715T-3 use a narrower 16-SOIC package (0.154", 3.90mm width), while IL 715E and IL 715T use the standard width (0.295", 7.50mm). The narrower package reduces PCB footprint but requires verification of board layout compatibility. Electrical performance is identical between width variants.
Q: Are GMR-based isolators (IL 715 series) suitable replacements for capacitive coupling isolators? A: GMR technology offers superior data rate (110Mbps vs 1Mbps) and CMTI (100kV/µs vs 25kV/µs) performance. However, isolation voltage is lower (2500Vrms vs 4000Vpk). GMR substitution is appropriate only for applications where 2500Vrms isolation meets system requirements. The different isolation technology may require circuit-level validation.
Q: Which substitute part offers the best long-term availability? A: ISO6741DWR and all IL 715 variants carry Active product status, ensuring continued manufacturing and supply chain availability. ISO7231ADW shares Last Time Buy status with the original ISO7241ADW, limiting future availability.
Q: What RoHS compliance options are available? A: ISO6741DWR, ISO7231ADW, IL 715-3E, IL 715E, and IL 715ETR13 are ROHS3 compliant. IL 715, IL 715-3, IL 715T, and IL 715T-3 are RoHS non-compliant. Design requirements for RoHS compliance should guide part selection.
Q: Can I use IL 715-3E if my application requires -40°C to 125°C operation? A: IL 715-3E is rated only to 100°C maximum operating temperature, which is 25°C below the ISO7241ADW specification. Use is not recommended for applications requiring the full 125°C upper temperature limit.
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