ISD74G Equivalent & Substitute Parts

Part Overview

The ISD74G is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation with a 5300Vrms rating across 2 channels in an 8-DIP package. The ISD74G is classified as an active product with full inventory availability. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the specifications of this product category, ensuring functional interchangeability in circuit applications requiring dual-channel isolation.

Substiute Parts

ISD74G

Isocom Components 2004 LTDIn Stock: 1076ISD74G Datasheet

Current PartRFQ

ISD74XG

Isocom Components 2004 LTDIn Stock: 1271ISD74XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD74G is determined by strict equivalence across the following critical parameters:

• Number of Channels: 2 channels required
• Voltage - Isolation: 5300Vrms minimum
• Output Type: Transistor output configuration
• Voltage - Output (Max): 50V or greater
• Current - Output / Channel: 50mA or greater
• Package / Case: 8-DIP (0.400", 10.16mm) form factor
• Current Transfer Ratio (Min): 12.5% @ 16mA or greater
• Operating Temperature Range: -25°C ~ 100°C or wider
• Product Status: Active
• RoHS Compliance: ROHS3 Compliant

The ISD74XG meets all substitution criteria as a parametric equivalent within the ISD series optoisolator family.

Parameter Comparison

Engineering Selection Recommendations

The ISD74XG is a direct parametric equivalent to the ISD74G. Both components are manufactured by Isocom Components 2004 LTD and maintain identical electrical and mechanical specifications. Selection between these parts may be based on inventory availability: ISD74G has 983 pieces in stock, while ISD74XG has 1184 pieces in stock. Both parts carry active product status, ROHS3 compliance, and REACH unaffected designation, meeting current regulatory requirements for industrial and commercial applications. The 8-DIP through-hole package ensures compatibility with existing PCB layouts designed for either variant.

Frequently Asked Questions (FAQ)

Q: Can ISD74XG replace ISD74G in existing designs? A: Yes. The ISD74XG is a parametric equivalent with identical electrical ratings, isolation voltage, channel configuration, output characteristics, and package form factor. Direct substitution is supported without circuit modification.

Q: Are there differences in isolation voltage between ISD74G and ISD74XG? A: No. Both parts provide 5300Vrms isolation voltage across 2 channels, meeting the same safety and performance requirements.

Q: Do both parts support the same operating temperature range? A: Yes. Both ISD74G and ISD74XG operate across -25°C to 100°C, ensuring compatibility in equivalent thermal environments.

Q: Is the 8-DIP package identical for both parts? A: Yes. Both components use the 8-DIP (0.400", 10.16mm) through-hole package with identical pin configuration and mechanical dimensions.

Q: Are both parts RoHS compliant? A: Yes. Both ISD74G and ISD74XG are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the current transfer ratio specification for these parts? A: Both parts specify a minimum current transfer ratio of 12.5% at 16mA input current, ensuring consistent optical coupling efficiency.

Q: Can these parts be used interchangeably in PCB assembly? A: Yes. Identical package specifications, pin assignments, and electrical characteristics allow direct PCB layout reuse without design changes.