MST6111C Equivalent & Substitute Parts

Part Overview

The MST6111C is a 3-character red 7-segment LED display module manufactured by onsemi in a 12-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The display operates at 2.1V forward voltage with a 20mA test current and features common anode configuration suitable for multiplexed or direct-drive applications in numeric display systems.

Substiute Parts

MST6111C

onsemiIn Stock: 990MST6111C Datasheet

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LDT-A514RI

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

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LTC-561HR

Lite-On Inc.In Stock: 696LTC-561HR Datasheet

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LTC-561P

Lite-On Inc.In Stock: 1092LTC-561P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MST6111C is determined by the following critical parameters: character count (3 characters), digit size (0.56"), display type (7-segment), common anode configuration, red color, forward voltage range (2.1V nominal), test current (20mA), and package type (12-DIP). Parts meeting all these criteria are considered direct functional equivalents. The LTC-561P from Lite-On Inc. matches all primary electrical and mechanical specifications. The LDT-A514RI and LTC-561HR are listed as alternatives but present trade-offs in character count, package configuration, or electrical performance that require design evaluation.

Parameter Comparison

Engineering Selection Recommendations

LTC-561P is the primary substitute for MST6111C. Both parts share identical character count (3), digit size (0.56"), package type (12-DIP), forward voltage (2.1V), and test current (20mA). LTC-561P carries active product status and ROHS3 compliance, providing long-term availability and regulatory alignment.

LDT-A514RI presents a package incompatibility (28-DIP versus 12-DIP) and reduced test current (10mA versus 20mA), requiring PCB redesign and circuit recalculation. This part is suitable only when package footprint changes are acceptable.

LTC-561HR maintains 12-DIP package compatibility and 20mA test current but provides only 2 characters instead of 3, making it unsuitable for applications requiring 3-character display capability.

Frequently Asked Questions (FAQ)

Q: Can LTC-561P directly replace MST6111C without circuit modification? A: Yes. LTC-561P matches all critical electrical parameters (2.1V forward voltage, 20mA test current) and mechanical specifications (12-DIP package, 0.56" digit size, 3-character configuration, common anode). No circuit redesign is required.

Q: Why is LDT-A514RI listed as a substitute if the package differs? A: LDT-A514RI is functionally equivalent in display characteristics (3 characters, 0.56" size, 7-segment, common anode, red color, 2.1V forward voltage) but requires PCB redesign due to 28-DIP packaging. It is suitable only for new designs or when board layout changes are feasible.

Q: What is the impact of LDT-A514RI's 10mA test current versus MST6111C's 20mA? A: The reduced test current affects brightness and power dissipation calculations. Designs must recalculate current-limiting resistor values and verify brightness adequacy for the intended application.

Q: Is LTC-561HR a viable substitute? A: LTC-561HR is not recommended as a direct substitute due to 2-character limitation versus the 3-character requirement of MST6111C. It is suitable only for applications where display capacity can be reduced.

Q: What compliance certifications should I verify for long-term supply? A: LTC-561P and LTC-561HR both carry ROHS3 compliance, ensuring regulatory alignment with current environmental standards. Verify REACH compliance status with your supplier for specific end-market requirements.

Q: Are there package footprint considerations when switching from MST6111C to LTC-561P? A: Both parts use 12-DIP (0.600", 15.24mm) package configuration. Verify pin pitch and lead spacing with component datasheets to confirm PCB footprint compatibility, as minor dimensional variations may exist between manufacturers.