GMA2275C LED Matrix Display 5x7 Equivalent & Substitute Parts

Part Overview

The GMA2275C is a 5x7 dot matrix display module manufactured by onsemi, featuring a common anode row and common cathode column configuration with red LED elements. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The module operates at 1.8V forward voltage with a 5mcd brightness rating and is housed in a compact 1.50" L x 2.09" W x 0.33" H form factor.

Substiute Parts

GMA2275C

onsemiIn Stock: 1102GMA2275C Datasheet

Current PartRFQ

LTP-2157AKA

Lite-On Inc.In Stock: 1112LTP-2157AKA Datasheet

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LTP-2157AKY

Lite-On Inc.In Stock: 1177LTP-2157AKY Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMA2275C are identified based on the following critical parameters that determine functional compatibility:

• Configuration: Must be 5x7 dot matrix
• Internal Connection: Must be Common Anode Row, Common Cathode Column
• Size / Dimension: Physical footprint must match or be compatible with 1.50" L x 2.09" W form factor
• Moisture Sensitivity Level: MSL 1 (Unlimited) ensures equivalent handling requirements

The substitute parts listed below maintain these core parameters. Variations in color, forward voltage, and brightness rating are noted as they may require circuit design adjustments but do not prevent functional substitution in applications where the display color is not critical to system function.

Parameter Comparison

Engineering Selection Recommendations

LTP-2157AKA (Lite-On Inc.) is the primary substitute for applications requiring red or orange-red display output. This part maintains active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment. The forward voltage increase from 1.8V to 2.05V and brightness reduction from 5mcd to 4.6mcd require circuit verification but do not prevent direct substitution in most display applications.

LTP-2157AKY (Lite-On Inc.) is suitable for applications where yellow display output is acceptable. This part is active and available but carries RoHS non-compliant status, which may restrict use in regulated markets or applications with RoHS requirements.

Both Lite-On substitutes share identical mechanical dimensions within tolerance and maintain the same internal connection topology as the GMA2275C, enabling direct pinout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LTP-2157AKA directly replace the GMA2275C without circuit modification?

A: The LTP-2157AKA maintains identical pinout and internal connection configuration. However, the forward voltage increase from 1.8V to 2.05V requires verification of current-limiting resistor values in the driving circuit to ensure proper brightness and LED lifespan.

Q: What is the impact of the 0.01" height difference between the GMA2275C and LTP-2157A series?

A: The height difference (0.33" vs 0.34") is within typical mechanical tolerance for PCB-mounted display modules and does not affect electrical function or standard mounting practices.

Q: Why does the LTP-2157AKY show RoHS non-compliant status?

A: RoHS compliance status is determined by material composition and manufacturing processes. The LTP-2157AKY does not meet RoHS3 requirements and should not be used in applications subject to RoHS regulations.

Q: Are the brightness differences between parts significant?

A: The GMA2275C operates at 5mcd while both Lite-On substitutes operate at 4.6mcd. This 8% reduction in brightness may be perceptible in high-ambient-light environments and should be evaluated against application requirements.

Q: What is the MSL rating and why is it important?

A: MSL 1 (Unlimited) indicates these components have unlimited shelf life and require no special moisture control during storage or handling, simplifying supply chain management across all three parts.