MM5452N/NOPB Equivalent & Substitute Parts

Part Overview

The MM5452N/NOPB is a 7-segment LCD driver IC manufactured by Texas Instruments, designed to drive 4.5-digit alphanumeric and bar graph displays. This 40-DIP through-hole component operates across a 3V to 10V supply range and supports serial interface communication. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design considerations where legacy compatibility is required.

Substiute Parts

MM5452N/NOPB

Texas InstrumentsIn Stock: 1115MM5452N/NOPB Datasheet

Current PartRFQ

MM5452V/NOPB

Texas InstrumentsIn Stock: 1705MM5452V/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM5452N/NOPB is determined by the following critical parameters:

• Functional Equivalence: Display configuration (7 Segment + DP, Alphanumeric and Bar Graph), digit count (4.5 Digits), and serial interface must remain identical
• Electrical Compatibility: Supply voltage range (3V ~ 10V) and operating temperature range (-40°C ~ 85°C) must be maintained or exceeded
• Base Product Number: Both parts share the MM5452 base designation, confirming functional equivalence
• Compliance Requirements: RoHS3 compliance and REACH unaffected status must be preserved

The MM5452V/NOPB qualifies as a direct functional substitute based on these parameters. The primary difference is the transition from through-hole DIP packaging to surface-mount PLCC packaging, which represents a design evolution within the same product family rather than a functional deviation.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs: The MM5452N/NOPB remains the appropriate choice where existing board layouts and assembly processes are optimized for 40-DIP through-hole components. Current inventory of 1083 pieces supports ongoing production requirements.

For Surface-Mount PCB Designs: The MM5452V/NOPB is the functional equivalent for new designs or board revisions utilizing surface-mount assembly. The 44-PLCC package provides equivalent electrical performance with improved manufacturing efficiency. Inventory of 1599 pieces is available; however, the Last Time Buy status indicates limited future availability.

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards.

Moisture Sensitivity: The MM5452V/NOPB carries MSL 3 (168 Hours) compared to MSL 1 (Unlimited) for the MM5452N/NOPB. This difference requires appropriate handling and storage protocols during surface-mount assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the MM5452V/NOPB directly replace the MM5452N/NOPB in existing designs?

A: Electrical and functional replacement is direct. However, PCB layout and assembly process modifications are required due to the transition from 40-DIP through-hole to 44-PLCC surface-mount packaging. Footprint redesign and reflow soldering processes are necessary.

Q: What are the key differences between these two parts?

A: The primary differences are packaging format (through-hole DIP versus surface-mount PLCC), pin count (40 versus 44), and moisture sensitivity level (MSL 1 versus MSL 3). All electrical parameters, display configuration, and interface specifications remain identical.

Q: Are both parts still available for procurement?

A: The MM5452N/NOPB is classified as obsolete with 1083 pieces in current inventory. The MM5452V/NOPB is designated Last Time Buy with 1599 pieces available. Both parts have limited future availability.

Q: Do these parts require different handling procedures?

A: The MM5452V/NOPB requires moisture sensitivity level 3 handling (168-hour floor life after moisture exposure). The MM5452N/NOPB has unlimited floor life. Surface-mount assembly of the MM5452V/NOPB requires standard reflow soldering procedures and appropriate moisture control during storage and handling.

Q: What is the pin configuration difference between the 40-DIP and 44-PLCC packages?

A: The 40-DIP package contains 40 pins in a dual in-line configuration. The 44-PLCC package contains 44 pins in a plastic leaded chip carrier J-lead configuration. Pin assignments differ; complete datasheet reference is required for accurate PCB layout design.