ILQ74-X009 Equivalent & Substitute Parts

Part Overview

The ILQ74-X009 is a 4-channel optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation voltage in a 16-SMD surface mount package. The product is designated as Last Time Buy, indicating end-of-life status. Equivalent and substitute parts are necessary to ensure design continuity and procurement flexibility for applications requiring 4-channel optoisolation with high voltage isolation ratings.

Substiute Parts

ILQ74-X009

Vishay Semiconductor Opto DivisionIn Stock: 1892ILQ74-X009 Datasheet

Current PartRFQ

ILQ74SM

Isocom Components 2004 LTDIn Stock: 999ILQ74SM Datasheet

MFR RecommendedRFQ

ILQ74SMT&R

Isocom Components 2004 LTDIn Stock: 1040ILQ74SMT&R Datasheet

MFR RecommendedRFQ

ILQ74XSM

Isocom Components 2004 LTDIn Stock: 831ILQ74XSM Datasheet

MFR RecommendedRFQ

ILQ74XSMT&R

Isocom Components 2004 LTDIn Stock: 1227ILQ74XSMT&R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ILQ74-X009 are grouped based on isolation voltage rating, which is the primary parameter determining functional equivalence in optoisolator applications.

Group 1: 5300Vrms Isolation Voltage (Direct Functional Equivalents)

• ILQ74XSM (Tube packaging)
• ILQ74XSMT&R (Tape & Reel packaging)

These parts maintain the same 5300Vrms isolation voltage as the main part, ensuring equivalent performance in high-voltage isolation applications. Both are available in active product status from Isocom Components 2004 LTD.

Group 2: 7.5Vpk Isolation Voltage (Lower Isolation Rating)

• ILQ74SM (Tube packaging)
• ILQ74SMT&R (Tape & Reel packaging)

These parts feature a lower isolation voltage rating of 7.5Vpk and are suitable only for applications where reduced isolation voltage is acceptable. Both are available in active product status from Isocom Components 2004 LTD.

All substitute parts share the following critical parameters with the main part: 4-channel configuration, transistor output type, DC input type, 16-SMD Gull Wing package, ROHS3 compliance, and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement (5300Vrms Isolation): Select ILQ74XSM or ILQ74XSMT&R when isolation voltage rating must remain at 5300Vrms. Both parts are in active product status and carry ROHS3 compliance. Choose ILQ74XSM for tube packaging or ILQ74XSMT&R for tape and reel packaging based on assembly requirements. These parts are functionally equivalent to the ILQ74-X009 across all critical isolation parameters.

For Applications Accepting Lower Isolation Voltage (7.5Vpk): Select ILQ74SM or ILQ74SMT&R only when application requirements permit reduced isolation voltage. Both parts are in active product status and carry ROHS3 compliance. Choose ILQ74SM for tube packaging or ILQ74SMT&R for tape and reel packaging based on assembly requirements.

Packaging Considerations: Tube packaging (ILQ74XSM, ILQ74SM) is suitable for lower-volume production and manual assembly. Tape and reel packaging (ILQ74XSMT&R, ILQ74SMT&R) is required for automated pick-and-place assembly processes.

Temperature Range Consideration: The ILQ74-X009 operates from -55°C to 100°C. All substitute parts operate from -25°C to 100°C. Applications requiring operation below -25°C cannot use these substitutes.

Frequently Asked Questions (FAQ)

Q: Can ILQ74SM or ILQ74SMT&R be used as direct replacements for ILQ74-X009? A: ILQ74SM and ILQ74SMT&R have a lower isolation voltage rating of 7.5Vpk compared to the ILQ74-X009's 5300Vrms. They are functionally equivalent only in applications where the reduced isolation voltage is acceptable. For applications requiring 5300Vrms isolation, use ILQ74XSM or ILQ74XSMT&R.

Q: What is the difference between tube and tape & reel packaging options? A: Tube packaging (ILQ74XSM, ILQ74SM) is used for manual handling and lower-volume assembly. Tape and reel packaging (ILQ74XSMT&R, ILQ74SMT&R) is required for automated surface mount assembly equipment. Both packaging types contain identical components.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The ILQ74-X009 and all substitute parts (ILQ74XSM, ILQ74XSMT&R, ILQ74SM, ILQ74SMT&R) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the impact of the lower maximum output voltage in substitute parts? A: Substitute parts from Isocom have a maximum output voltage of 50V compared to the ILQ74-X009's 20V. This higher rating provides greater design margin and is compatible with applications designed for the original part.

Q: Can substitute parts be used in applications requiring -55°C operation? A: No. All substitute parts operate from -25°C to 100°C. The ILQ74-X009 operates from -55°C to 100°C. Applications requiring operation below -25°C cannot use these substitutes.

Q: Why is the ILQ74-X009 designated as Last Time Buy? A: Last Time Buy status indicates the product is being discontinued by the manufacturer. Substitute parts in active status (ILQ74XSM, ILQ74XSMT&R, ILQ74SM, ILQ74SMT&R) provide long-term design continuity and procurement availability.