LTD-5250WC 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LTD-5250WC is a 2-character red 7-segment LED display module manufactured by Lite-On Inc. in 18-DIP packaging. This common anode display operates at 2V forward voltage with a 20mA test current and features 0.52" digit height. The component is actively produced and RoHS3 compliant, making it suitable for legacy and new design applications requiring dual-character numeric or alphanumeric display functionality.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design requirements permit operation within alternative electrical or mechanical specifications. The parts listed below maintain functional compatibility through matching package type, display configuration, and core electrical characteristics.

Substiute Parts

LTD-5250WC

Lite-On Inc.In Stock: 735LTD-5250WC Datasheet

Current PartRFQ

HDSP-521A

Broadcom LimitedIn Stock: 6099HDSP-521A Datasheet

MFR RecommendedRFQ

HDSP-K111

Broadcom LimitedIn Stock: 2166HDSP-K111 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTD-5250WC is determined by the following mandatory parameters:

• Package Type: Must be 18-DIP (0.600", 15.24mm) for PCB footprint compatibility
• Display Configuration: Must be 2-character, 7-segment, common anode
• Color: Must be red wavelength (630nm–660nm range)
• Common Pin Type: Must be common anode to maintain circuit compatibility
• RoHS Compliance: Must meet RoHS3 standard for regulatory alignment

The substitute parts HDSP-521A and HDSP-K111, both manufactured by Broadcom Limited, satisfy all mandatory substitution criteria. Both parts maintain the 18-DIP package footprint, 2-character 7-segment common anode configuration, and red LED color specification. Electrical parameters including forward voltage, test current, and power dissipation vary within acceptable ranges for typical display driver circuit designs.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and RoHS3 compliance, ensuring regulatory and supply chain continuity. Selection between LTD-5250WC and its substitutes depends on circuit-level electrical requirements:

HDSP-521A operates at 1.85V forward voltage with 20mA test current, producing 6.5mcd brightness at 660nm wavelength. This part closely matches the original part's current specification while reducing forward voltage by 0.15V and power dissipation to 30mW. The 0.56" digit height represents a 0.04" increase over the LTD-5250WC.

HDSP-K111 operates at 1.7V forward voltage with 5mA test current, producing 4.2mcd brightness at 645nm wavelength. This part significantly reduces power dissipation to 37mW and current draw to 5mA, suitable for low-power applications. The reduced brightness and current specifications require circuit design verification for visibility and driver compatibility.

Both Broadcom substitutes are available in higher inventory quantities (6052 and 2100 units respectively) compared to the LTD-5250WC (679 units).

Frequently Asked Questions (FAQ)

Q: Can HDSP-521A and HDSP-K111 be used interchangeably with LTD-5250WC?

A: Both parts share the same 18-DIP package footprint and common anode 2-character 7-segment configuration, enabling direct PCB socket compatibility. However, electrical parameter differences require circuit validation. HDSP-521A maintains the 20mA test current specification, while HDSP-K111 operates at 5mA, necessitating driver circuit adjustment.

Q: What is the impact of digit height variation?

A: LTD-5250WC features 0.52" digit height, while both Broadcom substitutes provide 0.56" height. This 0.04" difference affects visual display size and may impact enclosure fit or viewing angle characteristics. Mechanical integration must be verified for applications with tight dimensional constraints.

Q: How do forward voltage differences affect circuit design?

A: LTD-5250WC operates at 2V, HDSP-521A at 1.85V, and HDSP-K111 at 1.7V. Lower forward voltages reduce power dissipation but require driver circuit verification to ensure adequate segment illumination. Current-limiting resistor values may require adjustment based on the selected substitute.

Q: Are there brightness differences between the parts?

A: LTD-5250WC produces 7.5mcd at 630nm, HDSP-521A produces 6.5mcd at 660nm, and HDSP-K111 produces 4.2mcd at 645nm. Brightness perception varies with wavelength and application lighting conditions. HDSP-K111's reduced brightness may require circuit design consideration for low-light visibility.

Q: What packaging options are available?

A: LTD-5250WC is supplied in standard packaging. HDSP-521A is available in Tube packaging, while HDSP-K111 is available in Bulk packaging. Packaging selection affects handling, storage, and assembly process compatibility.