LDS-A5645RI Equivalent & Substitute Parts

Part Overview

The LDS-A5645RI is a single-character 7-segment LED display module manufactured by Lumex Opto/Components Inc. This common anode red display operates at 2V forward voltage with a 10mA test current and features a 0.56" digit height in a 10-DIP package. The device is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent functional performance can be achieved within the constraints of common anode configuration, 7-segment display architecture, 10-DIP packaging, and compatible electrical operating parameters. The substitute parts listed maintain compatibility with existing circuit designs while offering alternative sourcing options.

Substiute Parts

LDS-A5645RI

Lumex Opto/Components Inc.In Stock: 1147LDS-A5645RI Datasheet

Current PartRFQ

LAP-601VB

Rohm SemiconductorIn Stock: 913LAP-601VB Datasheet

SimilarRFQ

XDMR14A

SunLEDIn Stock: 829XDMR14A Datasheet

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XDUR14A

SunLEDIn Stock: 6986XDUR14A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LDS-A5645RI is determined by the following mandatory parameters:

Fixed Requirements (No Deviation Permitted):

• Display Type: 7-Segment LED
• Common Pin Configuration: Common Anode
• Number of Characters: 1
• Package Type: 10-DIP (0.600", 15.24mm)
• Color: Red

Allowable Parameter Variance:

• Digit Height: 0.56" ± 0.01" (14.22mm ± 0.25mm)
• Voltage - Forward (Typ): 1.8V to 2.0V
• Current - Test: 10mA (fixed)
• Millicandela Rating: Variable (brightness differences acceptable)
• Wavelength - Peak: 627nm to 700nm (red spectrum)
• Power Dissipation: Variable within device thermal limits

All substitute parts must maintain RoHS3 compliance and 10-DIP package compatibility to ensure direct circuit board integration without redesign.

Parameter Comparison

Engineering Selection Recommendations

LAP-601VB (Rohm Semiconductor): This substitute maintains active product status and RoHS3 compliance. The forward voltage of 1.9V falls within acceptable operating range. The digit height of 0.57" is within tolerance of the original 0.56" specification. Brightness is significantly higher at 36mcd compared to 1.5mcd of the original part. Power dissipation is elevated at 448mW maximum, requiring verification of thermal design margins in the application circuit. Moisture sensitivity level of 3 (168 hours) is more restrictive than the original unlimited rating and may impact storage and handling procedures.

XDMR14A (SunLED): This part is marked as obsolete and should not be selected for new designs or long-term production applications. Although electrical parameters are compatible (1.8V forward voltage, 34mcd brightness), the obsolete status creates supply chain risk and potential unavailability for future production runs.

XDUR14A (SunLED): This substitute is in active production status with RoHS3 compliance and unlimited moisture sensitivity rating matching the original part. Forward voltage of 1.9V is within specification. Digit height of 0.56" matches the original exactly. Brightness at 6.4mcd is closer to the original 1.5mcd than other substitutes, providing more consistent visual performance. Power dissipation of 75mW is lower than the original 105mW, reducing thermal load on the circuit. This part offers the most direct functional equivalence for active production applications.

Frequently Asked Questions (FAQ)

Q: Can the LAP-601VB be used as a direct replacement for the LDS-A5645RI?

A: The LAP-601VB is electrically compatible as a substitute within the 10-DIP common anode 7-segment architecture. However, the significantly higher brightness (36mcd vs. 1.5mcd) and elevated power dissipation (448mW vs. 105mW) require circuit verification. The moisture sensitivity level of 3 (168 hours) is more restrictive than the original unlimited rating and may affect storage conditions.

Q: Why is the XDMR14A listed if it is obsolete?

A: The XDMR14A is included in the substitute list to document historical equivalence and support legacy system maintenance. For new designs and ongoing production, the XDUR14A or LAP-601VB are preferred alternatives with active product status.

Q: What is the impact of different forward voltages among the substitute parts?

A: The substitute parts operate at 1.8V to 1.9V compared to the original 2V. This 0.1V to 0.2V difference is within typical LED operating tolerances and does not require circuit redesign. Current-limiting resistor values may require minor adjustment to maintain the 10mA test current specification, but the change is negligible for most applications.

Q: Are all substitute parts available in the same packaging format?

A: Yes, all substitute parts use the 10-DIP (0.600", 15.24mm) package format, ensuring direct pin-compatible installation on existing printed circuit boards without layout modifications.

Q: How do brightness differences affect circuit design?

A: The LAP-601VB provides significantly higher brightness (36mcd) compared to the original (1.5mcd), which may alter visual perception in the application. The XDUR14A provides intermediate brightness (6.4mcd), closer to the original specification. If consistent brightness is critical, the XDUR14A is the preferred substitute. If increased brightness is acceptable or beneficial, the LAP-601VB can be used with circuit verification.

Q: What are the moisture sensitivity implications for storage?

A: The original LDS-A5645RI and XDUR14A have MSL 1 (unlimited storage without baking). The LAP-601VB has MSL 3 (168 hours), requiring moisture control during storage and handling. Components must be stored in dry conditions and may require baking before reflow soldering if exposed to humidity.

Q: Can these parts be used interchangeably in production?

A: The XDUR14A offers the most direct interchangeability with active product status, matching moisture sensitivity and providing comparable brightness. The LAP-601VB requires circuit verification due to higher power dissipation and brightness. The XDMR14A should not be used for new production due to obsolete status.