MDA6340C Equivalent & Substitute Parts

Part Overview

The MDA6340C is a 14-segment alphanumeric LED display module manufactured by onsemi, designed for applications requiring dual-character yellow numeric and alphabetic display capability. This component features a common cathode configuration with a 0.54" character size and 18-DIP packaging. The product is currently classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

MDA6340C

onsemiIn Stock: 1136MDA6340C Datasheet

Current PartRFQ

LDD-F5403RI

Lumex Opto/Components Inc.In Stock: 1063LDD-F5403RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the MDA6340C are identified based on strict alignment with the following critical parameters:

• Display Configuration: 2-character, 14-segment alphanumeric format
• Character Size: 0.54" (13.72mm) digit/alpha size
• Common Pin Type: Common cathode architecture
• Color: Yellow LED emission
• Forward Voltage: 2.1V typical operation
• Package Type: 18-DIP (0.600", 15.24mm) pin spacing
• Physical Form Factor: Dimensions within acceptable tolerance for PCB mounting compatibility

The LDD-F5403RI from Lumex Opto/Components Inc. meets all critical substitution criteria. While minor variations exist in test current (10mA vs. 20mA), millicandela rating (2.5mcd vs. 4mcd), and wavelength peak (585nm vs. 590nm), these parameters remain within acceptable operational ranges for equivalent functional performance in standard display applications. The LDD-F5403RI maintains active product status and full compliance with current regulatory standards.

Parameter Comparison

Engineering Selection Recommendations

The LDD-F5403RI qualifies as a direct functional substitute for the MDA6340C based on matching display architecture, electrical interface, and physical form factor. The substitute component offers the following advantages:

• Active Product Status: The LDD-F5403RI maintains active manufacturing and distribution status, ensuring long-term availability and supply chain continuity compared to the obsolete MDA6340C.

• Regulatory Compliance: The LDD-F5403RI is RoHS3 compliant and maintains REACH unaffected status, meeting current environmental and regulatory requirements equivalent to the original component.

• Electrical Compatibility: Identical forward voltage (2.1V) and common cathode configuration ensure direct circuit compatibility without modification to driver circuitry or control logic.

• Package Compatibility: Identical 18-DIP package and pin spacing enable direct PCB footprint compatibility with minimal mechanical redesign.

• Power Efficiency: The lower test current (10mA vs. 20mA) in the substitute component results in reduced power dissipation during standard operation, providing thermal and efficiency benefits.

Selection of the LDD-F5403RI is appropriate for new designs, system updates, and replacement applications where the MDA6340C is no longer available. Applications with specific brightness requirements above 2.5mcd should evaluate the reduced millicandela rating of the substitute component against system specifications.

Frequently Asked Questions (FAQ)

Q: Can the LDD-F5403RI be used as a direct replacement for the MDA6340C without PCB modifications?

A: Yes. Both components share identical 18-DIP package geometry, pin spacing (0.600", 15.24mm), forward voltage (2.1V), and common cathode configuration. Direct PCB footprint compatibility is maintained. No circuit modifications are required.

Q: What is the impact of the lower millicandela rating (2.5mcd vs. 4mcd) in the LDD-F5403RI?

A: The substitute component has approximately 37.5% lower brightness. Applications requiring high-visibility display output in bright ambient light conditions should evaluate whether the reduced brightness meets system requirements. Standard indoor display applications typically accommodate this brightness level.

Q: Are there differences in wavelength between these components?

A: The MDA6340C has a peak wavelength of 590nm while the LDD-F5403RI operates at 585nm. Both wavelengths fall within the yellow spectrum (570–590nm range). The 5nm difference is not perceptible to human vision and does not affect functional compatibility.

Q: How do the power dissipation specifications compare?

A: The MDA6340C specifies 70mW maximum dissipation while the LDD-F5403RI specifies 105mW maximum. The substitute component has higher maximum dissipation despite lower test current, reflecting different measurement conditions. Actual operating dissipation depends on applied current and duty cycle in the specific application.

Q: Is the LDD-F5403RI available for immediate procurement?

A: The LDD-F5403RI maintains active product status with current manufacturing. Availability should be confirmed with authorized distributors. The MDA6340C is obsolete and no longer manufactured by onsemi.

Q: What certifications and compliance standards apply to the LDD-F5403RI?

A: The LDD-F5403RI is RoHS3 compliant and REACH unaffected. Both components share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications for export and tariff purposes.