MAX1771CSA-T Equivalent & Substitute Parts

Part Overview

The MAX1771CSA-T is a Boost and Buck-Boost Regulator Controller IC manufactured by Analog Devices Inc./Maxim Integrated. This device functions as a transistor driver for positive output step-up and step-up/step-down DC-DC conversion applications. The part is classified as obsolete, which necessitates identification of active equivalent alternatives to ensure continued design support and procurement availability. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement capability in existing designs.

Substiute Parts

MAX1771CSA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 2790MAX1771CSA-T Datasheet

Current PartRFQ

MAX1771CSA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 17074MAX1771CSA+T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The MAX1771CSA+T qualifies as a parametric equivalent to the MAX1771CSA-T based on the following substitution criteria:

Electrical Parameters Match:

• Voltage supply range: 3V ~ 16.5V (identical)
• Switching frequency: 300kHz (identical)
• Maximum duty cycle: 92% (identical)
• Output type, function, configuration, and topology (all identical)
• Operating temperature range: 0°C ~ 70°C (identical)

Package Compatibility:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) (identical)
• Mounting type: Surface Mount (identical)
• Supplier device package: 8-SOIC (identical)

Compliance & Certification:

• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)
• REACH Status: REACH Unaffected (identical)

Distinction: The primary difference is product status: MAX1771CSA-T is obsolete, while MAX1771CSA+T is active. The packaging format differs (standard tube vs. Cut Tape & Digi-Reel), but electrical and mechanical specifications are fully equivalent.

Parameter Comparison

Engineering Selection Recommendations

The MAX1771CSA+T is the direct active equivalent for the obsolete MAX1771CSA-T. Selection of the substitute part is based on:

Product Status: The MAX1771CSA-T is classified as obsolete, making the active MAX1771CSA+T the appropriate choice for new designs and ongoing production support.

Electrical Equivalence: All electrical parameters, including supply voltage range, switching frequency, duty cycle, output configuration, and operating temperature, are identical between the two parts.

Package Compatibility: Both parts use the 8-SOIC package with identical physical dimensions (0.154", 3.90mm width), ensuring direct PCB compatibility without layout modifications.

Compliance Alignment: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels, ensuring regulatory and environmental compliance requirements are met.

Procurement Consideration: The MAX1771CSA+T is available in Cut Tape and Digi-Reel packaging formats with significantly higher inventory availability (17,041 pieces in stock versus 2,700 pieces for the obsolete variant), supporting reliable supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MAX1771CSA+T be used as a direct replacement for MAX1771CSA-T in existing designs?

A: Yes. The MAX1771CSA+T is a parametric equivalent with identical electrical specifications, package dimensions, and pin configuration. No circuit modifications or PCB layout changes are required for direct substitution.

Q: What is the difference between MAX1771CSA-T and MAX1771CSA+T?

A: The primary difference is product status and packaging format. MAX1771CSA-T is obsolete, while MAX1771CSA+T is active. The electrical and mechanical specifications are fully equivalent. MAX1771CSA+T is supplied in Cut Tape and Digi-Reel formats.

Q: Are the pin configurations identical between these parts?

A: Yes. Both parts use the 8-SOIC package with identical pin assignments and electrical characteristics. Direct pin-for-pin replacement is supported.

Q: Do both parts meet the same compliance standards?

A: Yes. Both MAX1771CSA-T and MAX1771CSA+T are ROHS3 compliant, REACH unaffected, and have identical moisture sensitivity levels (MSL 1 - Unlimited).

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of 0°C to 70°C (TA).

Q: Are there any supply voltage or switching frequency differences?

A: No. Both parts support the same supply voltage range (3V ~ 16.5V) and switching frequency (300kHz), with identical maximum duty cycle specifications (92%).