ISP844G Equivalent & Substitute Parts

Part Overview

The ISP844G is a quad optocoupler with transistor output manufactured by Isocom Components 2004 LTD. This 16-pin DIP component provides AC/DC input isolation with 7.5Vpk isolation voltage and is designed for applications requiring galvanic isolation between input and output circuits. The part is currently active in production with 1116 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product category and packaging specification.

Substiute Parts

ISP844G

Isocom Components 2004 LTDIn Stock: 1133ISP844G Datasheet

Current PartRFQ

ISP844XG

Isocom Components 2004 LTDIn Stock: 818ISP844XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP844G is determined by strict equivalence across the following critical parameters:

• Number of Channels: 4
• Voltage - Isolation: 7.5Vpk
• Current Transfer Ratio range: 20% (Min) to 300% (Max) @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 35V
• Current - Output / Channel: 50mA
• Package / Case: 16-DIP (0.400", 10.16mm)
• Input Type: AC, DC
• Operating Temperature: -30°C ~ 100°C
• RoHS Status: ROHS3 Compliant

The ISP844XG meets all these criteria and is classified as a parametric equivalent within the ISP844 series.

Parameter Comparison

Engineering Selection Recommendations

Both the ISP844G and ISP844XG are active products from Isocom Components 2004 LTD within the ISP844 series. Selection between these parts should be based on availability and inventory status. The ISP844G currently has 1116 units in stock, while the ISP844XG has 742 units available. Both parts maintain identical electrical specifications, mechanical packaging, and regulatory compliance certifications including ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Either part is suitable for direct substitution in applications designed for the ISP844G.

Frequently Asked Questions (FAQ)

Q: Can ISP844XG replace ISP844G in existing designs? A: Yes. The ISP844XG is a parametric equivalent with identical electrical characteristics, isolation voltage, channel configuration, output specifications, and 16-DIP package dimensions. Direct substitution is supported.

Q: Are there differences in isolation voltage between these parts? A: No. Both parts provide 7.5Vpk isolation voltage with identical current transfer ratio specifications of 20% to 300% @ 1mA.

Q: Do both parts support AC and DC input? A: Yes. Both ISP844G and ISP844XG accept AC and DC input signals with identical rise and fall time characteristics of 4µs and 3µs respectively.

Q: Are the package dimensions identical? A: Yes. Both parts use 16-DIP (0.400", 10.16mm) through-hole packaging with identical pin configurations and mechanical specifications.

Q: What is the maximum output current per channel? A: Both parts support 50mA maximum output current per channel with 35V maximum output voltage rating.

Q: Are both parts RoHS compliant? A: Yes. Both ISP844G and ISP844XG are ROHS3 compliant with MSL rating of 1 (Unlimited) and REACH unaffected status.