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ISO7241ADWR Equivalent & Substitute Parts
Part Overview
The ISO7241ADWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 4000Vpk isolation voltage, 4 channels, and 1Mbps data rate in a 16-SOIC package. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring digital isolation functionality.
Substiute Parts
Key Parameters
| Parameter | ISO7241ADWR |
|---|---|
| Manufacturer | Texas Instruments |
| Technology | Capacitive Coupling |
| Number of Channels | 4 |
| Isolation Voltage | 4000Vpk |
| Common Mode Transient Immunity (Min) | 25kV/µs |
| Data Rate | 1Mbps |
| Propagation Delay (Max) | 95ns |
| Supply Voltage Range | 3.15V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following critical parameters:
- Channel Configuration: 4 channels with 3/1 input-output split
- Isolation Technology: Capacitive coupling or equivalent isolation method
- Isolation Voltage: Minimum 4000Vpk or equivalent Vrms rating
- Common Mode Transient Immunity: Minimum 25kV/µs
- Data Rate: Minimum 1Mbps
- Package Type: 16-SOIC form factor
- Supply Voltage Compatibility: Overlapping operating range with 3.15V ~ 5.5V
- Temperature Range: Support for -40°C ~ 125°C operation
- Compliance: RoHS3 compliance preferred for regulatory alignment
Substitutes are grouped into two categories:
Category 1 - MFR Recommended (Enhanced Performance): Parts with superior electrical characteristics while maintaining backward compatibility.
Category 2 - Parametric Equivalents (Same Performance Class): Parts with matching core specifications and same isolation technology.
Category 3 - Alternative Technology (GMR-Based): Parts using different isolation technology (Giant Magnetoresistive) with comparable or superior performance metrics.
Parameter Comparison
| Part Number | Manufacturer | Technology | Channels | Isolation Voltage | CMTI (Min) | Data Rate | Prop. Delay (Max) | Supply Voltage | Temp Range | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ISO7241ADWR | Texas Instruments | Capacitive Coupling | 4 | 4000Vpk | 25kV/µs | 1Mbps | 95ns | 3.15V ~ 5.5V | -40°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| ISO6741DWR | Texas Instruments | Capacitive Coupling | 4 | 5000Vrms | 100kV/µs | 50Mbps | 18ns | 2.25V ~ 5.5V | -40°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| ISO7231ADWR | Texas Instruments | Capacitive Coupling | 3 | 4000Vpk | 25kV/µs | 1Mbps | 95ns | 3.15V ~ 5.5V | -40°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| IL 715 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.295", 7.50mm) | RoHS non-compliant |
| IL 715-3 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.154", 3.90mm) | RoHS non-compliant |
| IL 715-3E | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| IL 715-3ETR7 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| IL 715E | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| IL 715ETR13 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 100°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| IL 715T | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | RoHS non-compliant |
| IL 715T-3 | NVE Corp/Isolation Products | GMR | 4 | 2500Vrms | 100kV/µs | 110Mbps | 15ns | 3V ~ 5.5V | -40°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | RoHS non-compliant |
Engineering Selection Recommendations
ISO6741DWR (MFR Recommended - Texas Instruments)
This part is the primary recommended substitute. It maintains the same manufacturer, capacitive coupling technology, and 16-SOIC package footprint. The ISO6741DWR exceeds the ISO7241ADWR in isolation voltage (5000Vrms vs. 4000Vpk), common mode transient immunity (100kV/µs vs. 25kV/µs), data rate (50Mbps vs. 1Mbps), and propagation delay performance (18ns vs. 95ns). Both parts are ROHS3 compliant and support the full -40°C to 125°C temperature range. The lower minimum supply voltage (2.25V) provides additional design flexibility. Active product status ensures long-term availability.
IL 715-3E or IL 715E (Alternative Technology - NVE Corp)
These GMR-based isolators provide superior performance in CMTI (100kV/µs), data rate (110Mbps), and propagation delay (15ns). Both are ROHS3 compliant and support the required temperature range. IL 715-3E uses a narrower 3.90mm package width, while IL 715E matches the 7.50mm width of the original part. The lower isolation voltage (2500Vrms) is acceptable for applications not requiring 4000Vpk isolation. Active product status ensures availability.
IL 715T-3 (Alternative Technology - Extended Temperature)
This part extends the operating temperature range to -40°C to 125°C, matching the original specification. It uses GMR technology with superior CMTI and data rate performance. The narrower 3.90mm package width differs from the original. RoHS non-compliance may be a consideration for regulated applications.
ISO7231ADWR (Parametric Equivalent - Texas Instruments)
This part matches the ISO7241ADWR in isolation voltage, CMTI, data rate, and temperature range. The primary difference is the reduced channel count (3 channels vs. 4 channels with 2/1 input-output split). This part is suitable only for applications requiring 3-channel isolation. ROHS3 compliance and active product status are maintained.
Frequently Asked Questions (FAQ)
Q: Can ISO6741DWR directly replace ISO7241ADWR in existing designs?
A: Yes, with design verification. Both parts use capacitive coupling technology, maintain the same 16-SOIC package footprint, and support identical temperature ranges. The ISO6741DWR provides superior electrical performance across all key metrics. PCB layout compatibility should be confirmed, as the parts are pin-compatible but may have different internal characteristics affecting signal integrity.
Q: What is the key difference between capacitive coupling and GMR technology?
A: Capacitive coupling (ISO7241ADWR, ISO6741DWR) and GMR technology (IL 715 series) are different isolation methods. Both achieve electrical isolation but use different physical mechanisms. GMR-based parts typically offer higher data rates and faster propagation delays. Selection depends on application requirements for isolation voltage, data rate, and EMI performance.
Q: Why do IL 715 series parts have lower isolation voltage than ISO7241ADWR?
A: The IL 715 series uses 2500Vrms isolation, which is lower than the ISO7241ADWR's 4000Vpk. However, 2500Vrms is equivalent to approximately 3536Vpk, making it suitable for most general-purpose applications. Applications requiring 4000Vpk isolation should use ISO6741DWR or remain with ISO7241ADWR equivalents.
Q: What is the significance of package width differences (0.295" vs. 0.154")?
A: Package width affects PCB layout and board density. The 0.295" (7.50mm) width is the standard 16-SOIC package. The 0.154" (3.90mm) width is a narrower variant (IL 715-3 series) that reduces board footprint. Substitution between these widths requires PCB redesign and layout verification.
Q: Are IL 715 series parts suitable for high-isolation-voltage applications?
A: No. The IL 715 series provides 2500Vrms isolation, which is lower than ISO7241ADWR's 4000Vpk. For applications requiring 4000Vpk or higher isolation, use ISO6741DWR (5000Vrms) or equivalent Texas Instruments parts. Verify isolation voltage requirements before substitution.
Q: What does RoHS compliance status mean for part selection?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, required for many regulated markets and OEM applications. ISO7241ADWR and ISO6741DWR are ROHS3 compliant. IL 715-3E, IL 715E, IL 715-3ETR7, and IL 715ETR13 are ROHS3 compliant. IL 715, IL 715-3, IL 715T, and IL 715T-3 are RoHS non-compliant and may not be acceptable for regulated applications.
Q: Can I use IL 715T-3 if my application requires -40°C to 125°C operation?
A: IL 715T-3 supports -40°C to 125°C operation, matching the original specification. However, it is RoHS non-compliant. If RoHS compliance is required, use IL 715-3E or IL 715E instead, which are ROHS3 compliant but limited to -40°C to 100°C operation.
Q: What is the inventory status of these substitute parts?
A: ISO6741DWR has 86,571 units in stock. IL 715-3E has 8,807 units. IL 715E has 4,460 units. IL 715T-3 has 849 units. IL 715-3ETR7 has 658 units. All substitute parts have adequate inventory for production use.
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