ISD204 Equivalent & Substitute Parts

Part Overview

The ISD204 is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. It provides galvanic isolation with a 7.5Vpk isolation voltage rating and single-channel configuration in an 8-DIP package. The device is currently in Active product status with 5550 units in stock. Finding equivalent parts may be necessary due to supply constraints, design optimization requirements, or application-specific performance needs.

Substiute Parts

ISD204

Isocom Components 2004 LTDIn Stock: 5572ISD204 Datasheet

Current PartRFQ

ILD2

Vishay Semiconductor Opto DivisionIn Stock: 2805ILD2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD204 is determined by the following critical parameters:

• Package compatibility: 8-DIP (0.300", 7.62mm) form factor
• Output type: Transistor output configuration
• Maximum output voltage: 70V
• Maximum output current per channel: 50mA
• Vce saturation: 400mV maximum
• Input type: DC
• RoHS3 compliance and REACH unaffected status

The ILD2 from Vishay Semiconductor Opto Division meets these core mechanical and electrical compatibility criteria. While the ILD2 features dual channels and higher isolation voltage (5300Vrms), it maintains the same package footprint, output voltage/current ratings, and saturation characteristics required for direct substitution in applications where single-channel operation is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The ISD204 is the primary choice for new designs due to its Active product status and current availability of 5550 units in stock. The ILD2 is classified as Last Time Buy, indicating limited future availability. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection between these parts should be based on channel requirements: the ISD204 provides single-channel isolation, while the ILD2 offers dual-channel capability in the same package footprint. The ILD2's faster turn-on time (1.2µs versus 3µs) may provide performance advantages in timing-critical applications, though both devices maintain identical maximum output voltage and current specifications.

Frequently Asked Questions (FAQ)

Q: Can the ILD2 directly replace the ISD204 in existing designs?

A: The ILD2 is mechanically compatible due to identical 8-DIP packaging and maintains the same maximum output voltage (70V) and current (50mA) ratings. However, the ILD2 features dual channels versus the ISD204's single channel. Designs utilizing only one channel can accommodate this substitution without circuit modification.

Q: What are the key differences in isolation voltage between these parts?

A: The ISD204 specifies 7.5Vpk isolation voltage, while the ILD2 provides 5300Vrms isolation. These are measured using different standards (peak voltage versus RMS voltage) and represent different isolation capabilities. The ILD2 offers significantly higher isolation performance.

Q: Are both parts suitable for new production designs?

A: The ISD204 is recommended for new designs as it maintains Active product status. The ILD2 is designated Last Time Buy, meaning production will cease and future availability cannot be guaranteed.

Q: How do the current transfer ratios compare?

A: The ISD204 specifies 200-400% CTR at 10mA, while the ILD2 specifies 100-500% CTR at 10mA. The ILD2 offers a wider range with lower minimum performance but higher maximum performance.

Q: Are there any temperature range considerations?

A: The ILD2 operates across -40°C to 100°C, providing a 15°C lower minimum operating temperature compared to the ISD204's -25°C to 100°C range. Applications requiring extended low-temperature operation should specify the ILD2.