ISD202 Equivalent & Substitute Parts

Part Overview

The ISD202 is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation with a single channel, rated for 7.5Vpk isolation voltage, and is housed in an 8-DIP package. The ISD202 is currently in active production status with 4900 units in stock. Alternative components may be required due to supply constraints, design optimization, or application-specific performance requirements.

Substiute Parts

ISD202

Isocom Components 2004 LTDIn Stock: 5008ISD202 Datasheet

Current PartRFQ

ILD5

Isocom Components 2004 LTDIn Stock: 1802ILD5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The ILD5 qualifies as a substitute for the ISD202 based on the following matching parameters:

• Single channel configuration (1 channel)
• Identical isolation voltage rating (7.5Vpk)
• Transistor output type
• Maximum output voltage (70V)
• Maximum output current per channel (50mA)
• Identical Vce saturation specification (400mV)
• Matching operating temperature range (-25°C ~ 100°C)
• Identical package type and dimensions (8-DIP, 0.300", 7.62mm)
• Through-hole mounting compatibility
• Equivalent compliance certifications (ROHS3, REACH Unaffected, EAR99)

The primary difference lies in the Current Transfer Ratio specification, where the ILD5 exhibits a wider range (50% to 400% @ 10mA) compared to the ISD202 (125% to 250% @ 10mA). This difference reflects design variations in the input-output coupling efficiency but does not preclude substitution in applications where the ILD5's broader CTR range is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Both the ISD202 and ILD5 maintain active product status and are manufactured by the same supplier. Both components satisfy ROHS3 compliance requirements and carry identical export classification (EAR99) and REACH status designations.

Selection between these components should be based on Current Transfer Ratio requirements specific to the application. The ISD202 provides a narrower, higher minimum CTR specification (125% minimum), suitable for applications requiring consistent coupling efficiency. The ILD5 accommodates a broader CTR range with a lower minimum threshold (50%), providing flexibility in applications where input signal variation is expected or where lower coupling efficiency is acceptable.

Both components are pin-compatible and functionally equivalent in terms of isolation voltage, output voltage rating, output current capacity, and thermal operating range. Substitution is electrically and mechanically viable when application requirements align with the respective Current Transfer Ratio specifications.

Frequently Asked Questions (FAQ)

Q: Can the ILD5 be used as a direct replacement for the ISD202 in existing designs?

A: Yes, the ILD5 is pin-compatible and mechanically interchangeable with the ISD202 in 8-DIP socket applications. Both components share identical package dimensions, isolation voltage, output voltage rating, output current capacity, and operating temperature range. Electrical compatibility depends on whether the application can tolerate the ILD5's broader Current Transfer Ratio range (50% to 400% @ 10mA) compared to the ISD202's narrower specification (125% to 250% @ 10mA).

Q: What is the significance of the Current Transfer Ratio difference between these parts?

A: Current Transfer Ratio (CTR) defines the ratio of output current to input current. The ISD202 guarantees a minimum CTR of 125%, while the ILD5 minimum is 50%. In applications where consistent output current response to input current is critical, the ISD202's higher minimum CTR provides tighter performance bounds. The ILD5's wider range accommodates greater design margin but may require circuit compensation if precise coupling efficiency is required.

Q: Are both components suitable for industrial temperature applications?

A: Both the ISD202 and ILD5 operate across the identical temperature range of -25°C to 100°C, making them suitable for standard industrial applications within this specification window.

Q: Do both components meet the same regulatory and compliance standards?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. They are equivalent in terms of environmental and export compliance requirements.

Q: What is the package compatibility between these optoisolators?

A: Both components use the 8-DIP package with identical dimensions (0.300", 7.62mm). They are mechanically and pin-compatible for through-hole PCB mounting applications.