MST6910C Equivalent & Substitute Parts

Part Overview

The MST6910C is a 3-character red 7-segment LED display module manufactured by onsemi, featuring a 0.56" digit height in a 28-DIP package configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The display operates at 2V forward voltage with a 20mA test current and delivers 2.2mcd brightness output at a 635nm peak wavelength.

Substiute Parts

MST6910C

onsemiIn Stock: 1064MST6910C Datasheet

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LB-603VF

Rohm SemiconductorIn Stock: 1357LB-603VF Datasheet

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LDT-A514RI

Lumex Opto/Components Inc.In Stock: 868LDT-A514RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MST6910C are qualified based on the following electrical and mechanical parameters:

• Display Configuration: 3-character, 7-segment, common anode architecture
• Package Type: 28-DIP (0.600", 15.24mm) form factor
• Digit Height: 0.56" (14.22mm ± tolerance)
• Color: Red LED emission
• Electrical Compatibility: Forward voltage range 2V to 2.1V; test current 10mA to 20mA
• Wavelength: Red spectrum (635nm to 650nm)
• Moisture Sensitivity: MSL 1 (Unlimited)

Two active substitute parts meet these criteria: LB-603VF (Rohm Semiconductor) and LDT-A514RI (Lumex Opto/Components Inc.). Both maintain the same package footprint, display configuration, and common anode topology required for direct circuit board replacement.

Parameter Comparison

Engineering Selection Recommendations

LB-603VF (Rohm Semiconductor) is recommended for applications prioritizing lower operating current. This part operates at 10mA test current compared to the MST6910C's 20mA, reducing power dissipation in current-limited designs. The LB-603VF maintains ROHS3 compliance and carries active product status with established supply chain availability. The 650nm wavelength represents a slight shift toward the orange-red spectrum compared to the original 635nm specification.

LDT-A514RI (Lumex Opto/Components Inc.) is recommended for applications requiring closest electrical and optical alignment to the original MST6910C. This part matches the 635nm peak wavelength and maintains similar physical dimensions. The forward voltage of 2.1V and 10mA test current provide compatible operation within standard circuit designs. LDT-A514RI carries ROHS3 compliance and active product status.

Both substitute parts are available in standard packaging (Bulk for LB-603VF, Tube for LDT-A514RI) and maintain the 28-DIP footprint for direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can LB-603VF and LDT-A514RI be used interchangeably with MST6910C?

A: Both parts are electrically and mechanically compatible as direct substitutes. The 28-DIP package footprint is identical across all three parts. Circuit designs using current-limiting resistors will accommodate the voltage and current variations without modification.

Q: What is the impact of the 10mA test current in substitute parts versus the original 20mA?

A: The lower test current in LB-603VF and LDT-A514RI reduces power dissipation per segment. Existing current-limiting resistor values will continue to function; however, brightness output may differ. The LB-603VF delivers 16mcd brightness, significantly higher than the MST6910C's 2.2mcd, while LDT-A514RI delivers 0.03mcd.

Q: Are there wavelength differences between the substitute parts?

A: LB-603VF operates at 650nm (orange-red), while both MST6910C and LDT-A514RI operate at 635nm (pure red). In applications where color matching across multiple displays is critical, LDT-A514RI maintains closer spectral alignment to the original part.

Q: What compliance certifications apply to these substitute parts?

A: Both LB-603VF and LDT-A514RI carry ROHS3 compliance and REACH Unaffected status. All three parts share MSL 1 (Unlimited) moisture sensitivity classification and EAR99 export control designation.

Q: Which substitute part offers the best long-term availability?

A: Both LB-603VF and LDT-A514RI carry active product status, indicating ongoing manufacturer support and supply chain availability. The MST6910C is classified as obsolete and should not be specified for new designs.