MAX861ISA Equivalent & Substitute Parts

Part Overview

The MAX861ISA is a charge pump switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power management applications requiring positive or negative fixed voltage outputs. This device operates as a ratiometric regulator with a single output capable of delivering 50mA, housed in an 8-SOIC surface mount package.

The MAX861ISA is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

MAX861ISA

Analog Devices Inc./Maxim IntegratedIn Stock: 6828MAX861ISA Datasheet

Current PartRFQ

MAX861ISA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2503MAX861ISA+ Datasheet

DirectRFQ

LMC7660IM/NOPB

Texas InstrumentsIn Stock: 366686LMC7660IM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX861ISA are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Topology: Charge Pump
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Output Configuration: Positive or Negative (or Negative only)
• Output Type: Fixed
• Number of Outputs: 1
• Voltage - Input Range: Minimum 1.5V to 5.5V maximum
• Current - Output: 50mA or greater
• Operating Temperature: -25°C ~ 85°C or compatible range

Substitute parts must maintain electrical compatibility within these parameters while offering active product status and improved compliance certifications where applicable.

Parameter Comparison

Engineering Selection Recommendations

MAX861ISA+ (Direct Substitute): The MAX861ISA+ is the primary equivalent for the obsolete MAX861ISA. Both parts share identical electrical specifications, including input voltage range (1.5V to 5.5V), output configuration (positive or negative), output current (50mA), and switching frequency options (13kHz, 100kHz, 250kHz). The MAX861ISA+ maintains active product status and achieves ROHS3 compliance, addressing regulatory requirements while preserving full functional compatibility. Packaging and mounting specifications are identical. This part is recommended as the direct replacement for new designs and production continuity.

LMC7660IM/NOPB (Alternative Substitute): The LMC7660IM/NOPB from Texas Instruments is a charge pump regulator in the same 8-SOIC package with active product status and ROHS3 compliance. This part is suitable for applications requiring negative output voltage generation (-Vin). Key differences include a wider input voltage range (1.5V to 10V maximum) and a lower switching frequency (10kHz). The LMC7660IM/NOPB does not support positive output voltage generation (2Vin configuration) and does not specify output current rating. This part is applicable only for designs requiring negative voltage output within the specified input range and is not suitable for applications requiring positive voltage generation or the full 50mA output current specification.

Frequently Asked Questions (FAQ)

Q: Can MAX861ISA+ be used as a direct replacement for MAX861ISA? A: Yes. The MAX861ISA+ is electrically and mechanically identical to the MAX861ISA, with identical input voltage range (1.5V to 5.5V), output configuration (positive or negative), output current (50mA), and switching frequency options. The primary difference is product status (active versus obsolete) and improved RoHS compliance.

Q: What are the key differences between MAX861ISA+ and LMC7660IM/NOPB? A: The MAX861ISA+ supports both positive and negative output configurations, while the LMC7660IM/NOPB supports negative output only. The LMC7660IM/NOPB has a wider input voltage range (up to 10V) and operates at a lower switching frequency (10kHz). The LMC7660IM/NOPB does not specify output current rating. Selection depends on whether positive voltage generation is required.

Q: Are all substitute parts in the same package? A: Yes. All parts listed—MAX861ISA, MAX861ISA+, and LMC7660IM/NOPB—use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring identical PCB footprint compatibility.

Q: Is the LMC7660IM/NOPB suitable for all MAX861ISA applications? A: No. The LMC7660IM/NOPB is suitable only for applications requiring negative voltage output (-Vin). It does not support positive voltage generation (2Vin) and does not specify output current capability. Verify application requirements before selection.

Q: What compliance improvements are available in substitute parts? A: Both MAX861ISA+ and LMC7660IM/NOPB achieve ROHS3 compliance, compared to the non-compliant status of the obsolete MAX861ISA. Both parts maintain REACH Unaffected status and EAR99 export classification.