MAX5094AASA-T Equivalent & Substitute Parts

Part Overview

The MAX5094AASA-T is a flyback and forward converter regulator controller IC manufactured by Analog Devices Inc./Maxim Integrated, designed for step-up/step-down DC-DC conversion applications with positive, isolation-capable output configuration. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The device operates as a transistor driver with frequency control capabilities across a wide supply voltage range of 7.6V to 30V.

Substiute Parts

MAX5094AASA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 817MAX5094AASA-T Datasheet

Current PartRFQ

MAX5094AASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4039MAX5094AASA+T Datasheet

DirectRFQ

UC1842AMDREP

Texas InstrumentsIn Stock: 2758UC1842AMDREP Datasheet

MFR RecommendedRFQ

UC1843AMDREP

Texas InstrumentsIn Stock: 1508UC1843AMDREP Datasheet

MFR RecommendedRFQ

UC1844AMDREP

Texas InstrumentsIn Stock: 1330UC1844AMDREP Datasheet

MFR RecommendedRFQ

UC1845AMDREP

Texas InstrumentsIn Stock: 1830UC1845AMDREP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX5094AASA-T is determined by the following critical parameters that must align across candidate parts:

Primary Substitution Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — identical physical footprint required
• Topology: Flyback, Forward Converter — functional architecture compatibility
• Function: Step-Up/Step-Down — DC-DC conversion capability
• Output Configuration: Positive, Isolation Capable — output characteristics
• Voltage - Supply Range: Minimum 7.6V to 30V overlap — operating voltage compatibility
• Frequency - Switching: 20kHz ~ 1MHz range — switching frequency capability
• Duty Cycle (Max): 96% or greater — maximum duty cycle support
• Mounting Type: Surface Mount — assembly compatibility
• RoHS Status: ROHS3 Compliant — environmental compliance

The substitute parts identified (UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, UC1845AMDREP) and the direct packaging variant (MAX5094AASA+T) meet these criteria. The MAX5094AASA+T is an active product variant of the same base part (MAX5094) with identical electrical specifications but different packaging format (Tape & Reel vs. tube). The Texas Instruments UC184x series parts are PWM controller ICs that satisfy the functional and physical requirements for substitution.

Parameter Comparison

Engineering Selection Recommendations

MAX5094AASA+T (Direct Variant): This is the recommended primary substitute. It is the active product variant of the same base part number (MAX5094) with identical electrical specifications and 8-SOIC package. The only difference is packaging format (Tape & Reel vs. tube). Product status is active with 4000 units in stock, ensuring long-term availability and supply chain stability.

UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, UC1845AMDREP (Texas Instruments PWM Controllers): These parts are functionally equivalent PWM controller ICs from Texas Instruments, all in 8-SOIC package with active product status. Selection among these variants depends on specific supply voltage requirements: UC1842AMDREP and UC1844AMDREP support 10V ~ 30V supply range, while UC1843AMDREP and UC1845AMDREP support 7.9V ~ 30V supply range. All parts meet RoHS3 compliance and MSL 1 requirements. Texas Instruments parts offer extended operating temperature range (-55°C to 125°C) compared to the MAX5094 series (-40°C to 125°C), providing additional thermal margin in demanding applications.

Frequently Asked Questions (FAQ)

Q: Why is the MAX5094AASA-T obsolete, and what are my options?

A: The MAX5094AASA-T is classified as obsolete by the manufacturer. The MAX5094AASA+T is the active variant with identical electrical performance, making it the direct replacement. Texas Instruments UC184x series parts provide functional equivalence for new designs.

Q: Can I use UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, or UC1845AMDREP interchangeably?

A: These parts are functionally equivalent but differ in supply voltage range. UC1842AMDREP and UC1844AMDREP require minimum 10V supply, while UC1843AMDREP and UC1845AMDREP operate from 7.9V minimum. Select based on your circuit's supply voltage specification.

Q: Are all substitute parts in the same 8-SOIC package?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB footprint and pin compatibility with the original MAX5094AASA-T.

Q: What is the difference between MAX5094AASA-T and MAX5094AASA+T?

A: Both parts have identical electrical specifications and 8-SOIC package. The difference is packaging format: MAX5094AASA-T is tube packaging (obsolete), while MAX5094AASA+T is Tape & Reel format (active). MAX5094AASA+T is the recommended direct replacement.

Q: Do the Texas Instruments substitutes meet the same compliance standards?

A: Yes. All UC184x variants are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the MAX5094AASA-T.

Q: What is the supply voltage compatibility range for substitution?

A: The MAX5094AASA-T operates from 7.6V to 30V. UC1843AMDREP and UC1845AMDREP support 7.9V to 30V (compatible). UC1842AMDREP and UC1844AMDREP support 10V to 30V (compatible only for circuits with minimum 10V supply).