LDS-C5645RI Equivalent & Substitute Parts

Part Overview

The LDS-C5645RI is a single-character red 7-segment LED display module manufactured by Lumex Opto/Components Inc. This display operates as a common cathode configuration and is housed in a 10-DIP package. The component is classified as Active product status and maintains full RoHS3 compliance. Substitute parts are identified when equivalent functional performance can be achieved within the mechanical and electrical constraints of the 10-DIP package form factor while maintaining common cathode architecture and red LED color specification.

Substiute Parts

LDS-C5645RI

Lumex Opto/Components Inc.In Stock: 931LDS-C5645RI Datasheet

Current PartRFQ

HDSP-H103

Broadcom LimitedIn Stock: 2171HDSP-H103 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LDS-C5645RI is determined by the following mandatory parameters:

Mechanical Compatibility:

• Package type must be 10-DIP (0.600", 15.24mm)
• Physical dimensions must accommodate PCB layout constraints
• Display character size must remain 0.56" (14.22mm)

Electrical Architecture:

• Display configuration must be 7-Segment
• Common pin type must be Common Cathode
• LED color must be Red

Regulatory Compliance:

• RoHS3 compliance required
• Moisture Sensitivity Level 1 classification

The HDSP-H103 manufactured by Broadcom Limited satisfies all mandatory substitution criteria. Both parts share identical package specifications, display architecture, and regulatory compliance status. Electrical performance parameters (forward voltage, test current, power dissipation, and luminous intensity) differ between the two parts but remain within acceptable operating ranges for typical 7-segment display applications.

Parameter Comparison

Engineering Selection Recommendations

Both the LDS-C5645RI and HDSP-H103 are Active product status components with full RoHS3 compliance and MSL Level 1 classification. Selection between these parts is based on application-specific electrical requirements and circuit design parameters.

The LDS-C5645RI operates at 2V forward voltage with 10mA test current and 105mW maximum power dissipation. The HDSP-H103 operates at 1.7V forward voltage with 5mA test current and 37mW maximum power dissipation. The HDSP-H103 exhibits higher luminous intensity (4.2mcd versus 0.8mcd) and lower power consumption characteristics.

Both components are mechanically interchangeable within 10-DIP socket applications. Physical dimensions are equivalent within manufacturing tolerances. Wavelength specifications differ (700nm versus 645nm), reflecting different red LED phosphor compositions but maintaining visual red color classification.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-H103 directly replace the LDS-C5645RI in existing PCB designs?

A: Mechanical replacement is direct due to identical 10-DIP package specifications and pin configuration. Electrical circuit parameters must be evaluated. The HDSP-H103 requires lower forward voltage (1.7V versus 2V) and lower test current (5mA versus 10mA). Existing current-limiting resistor values in the circuit design may require adjustment to accommodate these electrical differences.

Q: Are there pin-to-pin compatibility differences between these parts?

A: Both parts use 10-DIP (0.600", 15.24mm) package with common cathode configuration. Pin assignments are functionally equivalent for 7-segment display operation. Physical pin spacing and DIP package geometry are identical.

Q: What are the wavelength differences and do they affect visual appearance?

A: The LDS-C5645RI operates at 700nm peak wavelength while the HDSP-H103 operates at 645nm peak wavelength. Both wavelengths are within the red spectrum. The HDSP-H103 produces a slightly more orange-red appearance compared to the deeper red of the LDS-C5645RI. Visual color difference may be perceptible in side-by-side comparison.

Q: Which part has lower power consumption?

A: The HDSP-H103 has significantly lower maximum power dissipation (37mW versus 105mW). This results from lower operating voltage and current specifications. The HDSP-H103 is suitable for power-constrained applications.

Q: Are both parts RoHS compliant?

A: Both the LDS-C5645RI and HDSP-H103 are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity classification. Both parts meet current environmental and regulatory requirements.

Q: What is the brightness difference between these parts?

A: The HDSP-H103 has a millicandela rating of 4.2mcd compared to 0.8mcd for the LDS-C5645RI. The HDSP-H103 is approximately 5.25 times brighter. Application brightness requirements determine which part is appropriate for specific display visibility needs.