MAX7231CFI/D Equivalent & Substitute Parts

Part Overview

The MAX7231CFI/D is an LCD driver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, designed to drive 7-segment displays with 8 digits and 2 annunciators using a parallel interface. This component is classified as a Power Management PMIC and operates with a supply voltage range of 4.5V to 5.5V at a supply current of 30 µA.

The MAX7231CFI/D is currently listed as obsolete. Due to its discontinued status, sourcing original dice components may present supply chain challenges. Identifying equivalent substitute parts ensures design continuity and maintains production schedules for applications requiring 7-segment LCD display drivers with identical electrical and functional specifications.

Substiute Parts

MAX7231CFI/D

Analog Devices Inc./Maxim IntegratedIn Stock: 813MAX7231CFI/D Datasheet

Current PartRFQ

MAX7231BFIQH+D

Analog Devices Inc./Maxim IntegratedIn Stock: 790MAX7231BFIQH+D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX7231CFI/D is based on strict electrical and functional equivalence. The following parameters determine valid substitution:

• Display Driver Functionality: Both parts must drive 7-segment displays with 8 digits and 2 annunciators
• Interface Type: Parallel interface requirement must be maintained
• Supply Voltage: 4.5V to 5.5V operating range
• Supply Current: 30 µA specification
• Base Product Number: MAX7231 series maintains functional compatibility
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status required

The MAX7231BFIQH+D qualifies as a manufacturer-recommended substitute. While it differs in packaging format (44-PLCC surface mount versus dice), it maintains identical electrical specifications, display configuration, and interface characteristics. The substitute part is currently in active production status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The MAX7231BFIQH+D is the manufacturer-recommended substitute for the obsolete MAX7231CFI/D. Selection of this substitute is justified on the following engineering grounds:

Functional Equivalence: Both parts share identical electrical specifications for LCD driver operation, including supply voltage, supply current, display configuration, and parallel interface protocol.

Regulatory Compliance: The substitute part maintains ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements.

Product Availability: The MAX7231BFIQH+D is in active production status with documented inventory availability, eliminating supply chain risk associated with the obsolete main part.

Packaging Consideration: The substitute is supplied in 44-PLCC surface mount packaging rather than dice form. Design integration requires PCB layout modification and surface mount assembly capability. The expanded operating temperature range (-20°C to 85°C) provides additional thermal margin compared to the main part specification (0°C to 70°C).

Frequently Asked Questions (FAQ)

Q: Can the MAX7231BFIQH+D directly replace the MAX7231CFI/D in existing designs?

A: Electrical and functional replacement is direct. However, the packaging format differs: the main part is supplied as dice, while the substitute is a 44-PLCC surface mount component. PCB redesign and assembly process modification are required.

Q: What are the key electrical parameters that confirm substitution compatibility?

A: Supply voltage (4.5V to 5.5V), supply current (30 µA), display configuration (7 segment + 2 annunciators), 8-digit capacity, and parallel interface are identical between both parts.

Q: Does the substitute part have a wider operating temperature range?

A: Yes. The MAX7231BFIQH+D operates from -20°C to 85°C, compared to the main part's 0°C to 70°C range. This provides additional thermal operating margin in applications requiring extended temperature performance.

Q: Are both parts compliant with current environmental regulations?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the primary reason for substitution?

A: The MAX7231CFI/D is obsolete. The MAX7231BFIQH+D is the manufacturer-recommended active production equivalent, ensuring long-term supply availability and design continuity.