ISP845 Optoisolator Darlington Output Equivalent & Substitute Parts

Part Overview

The ISP845 is a quad-channel optoisolator with Darlington output configuration, rated for 5300Vrms isolation voltage. This component is designed for applications requiring high-voltage isolation with DC input and Darlington output stages. The ISP845 maintains active product status with 5670 units in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters.

Substiute Parts

ISP845

Isocom Components 2004 LTDIn Stock: 5684ISP845 Datasheet

Current PartRFQ

ISP845X

Isocom Components 2004 LTDIn Stock: 3088ISP845X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP845 are qualified based on strict equivalence across the following critical parameters:

• Number of channels: 4
• Isolation voltage: 5300Vrms
• Current transfer ratio range: 600% to 7500% @ 1mA
• Output type: Darlington configuration
• Maximum output voltage: 35V
• Output current per channel: 80mA
• Package type: 16-DIP (0.300", 7.62mm)
• Operating temperature range: -30°C ~ 100°C
• Compliance certifications: ROHS3, REACH Unaffected

The ISP845X is classified as a parametric equivalent based on identical electrical specifications and mechanical compatibility across all listed parameters.

Parameter Comparison

Engineering Selection Recommendations

Both ISP845 and ISP845X maintain active product status and are ROHS3 compliant with REACH unaffected classification. Selection between these parts is based on inventory availability and supply chain requirements. The ISP845 currently has 5670 units in stock, while the ISP845X has 3050 units available. Both components are suitable for direct substitution in applications requiring quad-channel Darlington optoisolation at 5300Vrms isolation voltage with identical electrical and thermal performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can ISP845X be used as a direct replacement for ISP845?

A: Yes. The ISP845X is a parametric equivalent with identical electrical specifications, output characteristics, isolation voltage, current transfer ratio, and 16-DIP package configuration. No circuit modifications are required.

Q: Are there differences in isolation voltage between ISP845 and ISP845X?

A: No. Both parts are rated for 5300Vrms isolation voltage with identical current transfer ratio specifications of 600% to 7500% @ 1mA.

Q: Do both parts support the same operating temperature range?

A: Yes. Both ISP845 and ISP845X operate across -30°C to 100°C with identical Darlington output characteristics and maximum output current of 80mA per channel.

Q: Are there any package or pinout differences?

A: No. Both components use 16-DIP (0.300", 7.62mm) through-hole packaging with identical mechanical and electrical pin configurations.

Q: What compliance certifications apply to both parts?

A: Both ISP845 and ISP845X are ROHS3 compliant, REACH unaffected, with Moisture Sensitivity Level 1 (unlimited). ECCN classification is EAR99 for both parts.