LDS-C5654RI 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The LDS-C5654RI is a single-character red 7-segment LED display module manufactured by Lumex Opto/Components Inc. in a 10-DIP package configuration. This display operates as a common cathode device with a 0.56-inch character height, designed for numeric and alphanumeric applications requiring compact form factors and standard DIP pinout compatibility.

The product maintains Active status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified based on matching core electrical and mechanical parameters: common cathode configuration, 0.56-inch digit size, 10-DIP package, red color, and compatible forward voltage and current specifications within acceptable operating ranges.

Substiute Parts

LDS-C5654RI

Lumex Opto/Components Inc.In Stock: 738LDS-C5654RI Datasheet

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HDSP-515A

Broadcom LimitedIn Stock: 6272HDSP-515A Datasheet

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HDSP-H153

Broadcom LimitedIn Stock: 2175HDSP-H153 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LDS-C5654RI are qualified based on the following mandatory matching criteria:

Electrical Compatibility:

• Common cathode configuration (required for pinout compatibility)
• Forward voltage (Vf) within 1.8V to 2.0V range (acceptable for standard logic-level driver circuits)
• Current rating of 10mA to 20mA (compatible with standard TTL/CMOS driver outputs)

Mechanical Compatibility:

• 0.56-inch (14.22mm) digit height (ensures visual consistency and mechanical fit in display windows)
• 10-DIP package with 0.600-inch (15.24mm) pitch (direct socket compatibility)
• Depth of 0.315 inches (8.00mm) (consistent with PCB clearance requirements)

Regulatory Compliance:

• ROHS3 compliance (environmental and hazardous substance restrictions)
• MSL 1 rating (unlimited moisture sensitivity, no special storage requirements)

The substitute parts HDSP-515A and HDSP-H153 meet all mandatory criteria. Variations in millicandela rating, wavelength, and power dissipation do not preclude substitution when the primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution: HDSP-515A

The HDSP-515A qualifies as a direct electrical substitute for the LDS-C5654RI. Both devices share identical package geometry (10-DIP, 0.600-inch pitch), common cathode configuration, and 0.56-inch digit height. The forward voltage differential (1.85V vs. 2.0V) falls within acceptable tolerance for standard logic-level driver circuits. The HDSP-515A operates at 20mA test current compared to the LDS-C5654RI's 10mA specification; however, this represents increased brightness capability rather than incompatibility. Both parts maintain ROHS3 compliance and MSL 1 rating. The HDSP-515A is currently in active production with 6203 units in stock.

Secondary Substitution: HDSP-H153

The HDSP-H153 provides an alternative substitute with identical package and pinout compatibility. Forward voltage (1.8V) and current rating (20mA) align with standard driver requirements. The HDSP-H153 exhibits higher millicandela rating (16mcd) and operates within the HDSP-H15x series designation. ROHS3 compliance and MSL 1 rating are maintained. The HDSP-H153 is in active production with 2100 units in stock.

Compliance Verification:

All three parts maintain ROHS3 compliance and unlimited moisture sensitivity (MSL 1), eliminating environmental and storage concerns. ECCN classification (EAR99) is consistent across all parts, confirming equivalent export control status.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-515A or HDSP-H153 be used as direct replacements for the LDS-C5654RI without circuit modification?

A: Yes. Both substitute parts share identical 10-DIP pinout, common cathode configuration, and 0.56-inch digit height. Forward voltage differences (1.85V and 1.8V versus 2.0V) are within acceptable tolerance for standard TTL/CMOS driver circuits. No circuit redesign is required for electrical compatibility.

Q: What is the significance of the millicandela rating differences between these parts?

A: Millicandela rating indicates display brightness. The LDS-C5654RI operates at 2.5mcd, while the HDSP-515A provides 6.5mcd and the HDSP-H153 provides 16mcd. Higher brightness may be advantageous in high-ambient-light environments but does not affect electrical compatibility or pinout functionality.

Q: Are there mechanical fit concerns when substituting these parts?

A: Mechanical fit is compatible. All three parts use 10-DIP packages with 0.600-inch (15.24mm) pitch and 0.315-inch (8.00mm) depth. Minor height variations (0.748" for LDS-C5654RI, 0.673" for HDSP-515A, 0.670" for HDSP-H153) do not affect socket compatibility or standard display window clearance.

Q: Do all substitute parts meet the same environmental and compliance standards?

A: Yes. The LDS-C5654RI, HDSP-515A, and HDSP-H153 all maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. No special storage or handling procedures are required for any of these parts.

Q: What is the difference in power dissipation between these parts?

A: Power dissipation varies: LDS-C5654RI (105mW maximum), HDSP-515A (30mW maximum), and HDSP-H153 (96mW maximum). Lower power dissipation in the HDSP-515A may reduce thermal load in high-density display applications. This parameter does not affect substitution eligibility but should be considered in thermal design analysis.

Q: Are the wavelength differences (635nm, 660nm, 645nm) significant for substitution?

A: Wavelength differences reflect variations in red color perception. The LDS-C5654RI emits at 635nm (orange-red), HDSP-515A at 660nm (deep red), and HDSP-H153 at 645nm (red). Visual color differences may be perceptible in side-by-side comparison but do not affect electrical or mechanical compatibility. Selection should consider application-specific color requirements.