MAX640ESA-T Equivalent & Substitute Parts

Part Overview

The MAX640ESA-T is a buck switching regulator IC from Analog Devices Inc./Maxim Integrated, classified as a Power Management (PMIC) component. This device functions as a step-down converter with positive output configuration, delivering adjustable or fixed output voltage at 225mA maximum current. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The MAX640ESA-T operates across an input voltage range of 4V to 11.5V and supports output configurations from 1.3V to 11.5V, making it suitable for various embedded and portable power applications.

Substiute Parts

MAX640ESA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1149MAX640ESA-T Datasheet

Current PartRFQ

MAX640ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 57247MAX640ESA+T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX640ESA-T is determined by strict equivalence across the following critical parameters:

• Topology & Function: Buck switching regulator with step-down conversion
• Output Configuration: Single positive output, adjustable or fixed voltage
• Electrical Specifications: Input voltage range 4V to 11.5V; output current capability of 225mA; output voltage range 1.3V to 11.5V
• Package Compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount package
• Operating Temperature Range: -40°C to 85°C (TA)
• Manufacturer Consistency: Same manufacturer (Analog Devices Inc./Maxim Integrated) ensures design compatibility and pin-level equivalence

The substitute part MAX640ESA+T maintains identical electrical and mechanical specifications while differing in product status (active vs. obsolete) and packaging format (Cut Tape & Digi-Reel vs. standard tape).

Parameter Comparison

Engineering Selection Recommendations

The MAX640ESA+T serves as the direct functional equivalent to the MAX640ESA-T. Both parts share identical electrical performance specifications and package geometry, ensuring pin-level compatibility and circuit-level interchangeability.

The primary distinction lies in product lifecycle status and regulatory compliance. The MAX640ESA-T is classified as obsolete, whereas the MAX640ESA+T maintains active production status with ROHS3 compliance certification. For new designs or production continuity, the MAX640ESA+T is the appropriate selection due to its active availability and enhanced environmental compliance posture. The MAX640ESA-T remains suitable only for legacy system maintenance where existing inventory is available and regulatory requirements do not mandate RoHS compliance.

Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), confirming equivalent regulatory treatment for export and supply chain purposes.

Frequently Asked Questions (FAQ)

Q: Are MAX640ESA-T and MAX640ESA+T pin-compatible?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pin assignments. Direct PCB substitution is possible without layout modification.

Q: What is the difference between MAX640ESA-T and MAX640ESA+T?

A: The parts are electrically and mechanically identical. The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and packaging format (standard vs. Cut Tape & Digi-Reel). The suffix designation (-T vs. +T) reflects packaging and compliance variations from the same manufacturer.

Q: Can I use MAX640ESA+T as a direct replacement for MAX640ESA-T in existing designs?

A: Yes. The MAX640ESA+T provides full functional equivalence with improved compliance status. No circuit redesign or component requalification is required for substitution.

Q: Why is MAX640ESA-T listed as obsolete?

A: Obsolescence reflects the manufacturer's discontinuation of this specific part variant. The MAX640ESA+T represents the current production equivalent, maintaining all electrical and mechanical specifications while offering enhanced regulatory compliance.

Q: Are there inventory considerations when selecting between these parts?

A: The MAX640ESA-T has limited inventory (1100 pcs), while MAX640ESA+T maintains significantly higher stock levels (57230 pcs). For production planning, MAX640ESA+T offers superior supply chain availability.

Q: Do both parts support the same output voltage configurations?

A: Yes. Both parts support adjustable or fixed output voltage configurations ranging from 1.3V to 11.5V with identical input voltage specifications (4V to 11.5V minimum/maximum).