HDSP-K123 Equivalent & Substitute Parts

Part Overview

The HDSP-K123 is a red 7-segment LED display module manufactured by Broadcom Limited, featuring a 2-character common cathode configuration in an 18-DIP package. This component is classified as Active product status and is widely used in numeric and alphanumeric display applications requiring compact form factors and standard DIP packaging. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for this display module category.

Substiute Parts

HDSP-K123

Broadcom LimitedIn Stock: 2165HDSP-K123 Datasheet

Current PartRFQ

LTD-6940HR

Lite-On Inc.In Stock: 2056LTD-6940HR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HDSP-K123 is determined by the following critical parameters:

• Display Configuration: 7-segment, 2-character, common cathode architecture
• Physical Compatibility: 0.56" digit size and 18-DIP package footprint
• Electrical Characteristics: Forward voltage (Vf), test current, and wavelength specifications
• Regulatory Compliance: RoHS3 compliance and MSL rating

The LTD-6940HR qualifies as a substitute based on matching display type, character count, common cathode configuration, digit size, and package format. Variations in forward voltage, test current, millicandela rating, and wavelength are within acceptable ranges for this component category.

Parameter Comparison

Engineering Selection Recommendations

Both the HDSP-K123 and LTD-6940HR maintain Active product status and ROHS3 compliance with unlimited moisture sensitivity ratings. The HDSP-K123 operates at lower forward voltage (1.7V) and test current (5mA) with higher brightness output (4.2mcd). The LTD-6940HR operates at higher forward voltage (2V) and test current (20mA) with lower brightness output (2.4mcd). Selection between these parts depends on circuit design requirements for voltage supply, current sourcing capability, and brightness specifications. Both parts are mechanically compatible with 18-DIP footprints and maintain the same digit size and display configuration.

Frequently Asked Questions (FAQ)

Q: Can the LTD-6940HR directly replace the HDSP-K123 in existing designs?

A: Mechanical and functional compatibility exists due to matching 18-DIP package format, 0.56" digit size, 2-character configuration, and common cathode architecture. However, electrical parameter differences require circuit verification. The LTD-6940HR requires higher forward voltage (2V vs. 1.7V) and higher test current (20mA vs. 5mA), with lower brightness output (2.4mcd vs. 4.2mcd).

Q: What are the key electrical differences between these parts?

A: The HDSP-K123 operates at 1.7V forward voltage with 5mA test current and 4.2mcd brightness. The LTD-6940HR operates at 2V forward voltage with 20mA test current and 2.4mcd brightness. Wavelength differs slightly (645nm vs. 635nm). Power dissipation is higher in the LTD-6940HR (75mW vs. 37mW).

Q: Are both parts RoHS compliant?

A: Yes, both the HDSP-K123 and LTD-6940HR are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the physical size difference?

A: The HDSP-K123 measures 0.670" H x 0.990" W x 0.315" D. The LTD-6940HR measures 0.750" H x 0.984" W x 0.315" D. Height and width differ slightly; depth is identical.

Q: Does packaging format affect substitution?

A: The HDSP-K123 is supplied in Bulk packaging, while the LTD-6940HR is supplied in Tube packaging. This affects handling and storage but does not impact electrical or mechanical compatibility.