HDSP-B42G Equivalent & Substitute Parts

Part Overview

The HDSP-B42G is a 4-character 7-segment LED display module manufactured by Broadcom Limited. It features a 0.56" green display with common anode configuration, designed for numeric and alphanumeric applications. The device operates at 2.2V forward voltage with a 20mA test current and delivers 3.2mcd brightness at 565nm peak wavelength.

This part is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this display module.

Substiute Parts

HDSP-B42G

Broadcom LimitedIn Stock: 891HDSP-B42G Datasheet

Current PartRFQ

LDQ-M512RI

Lumex Opto/Components Inc.In Stock: 5710LDQ-M512RI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HDSP-B42G is determined by strict alignment of the following critical parameters:

• Display Configuration: 4-character, 7-segment format with common anode architecture
• Physical Compatibility: 12-DIP package footprint (0.600", 15.24mm pitch) and mechanical envelope dimensions
• Electrical Characteristics: Forward voltage of 2.2V and wavelength of 565nm (green spectrum)
• Color and Brightness: Green LED with millicandela rating suitable for the application
• Pin Configuration: Common anode topology ensuring direct circuit compatibility

The LDQ-M512RI from Lumex Opto/Components Inc. meets all substitution criteria. Both parts share identical package specifications, electrical operating voltage, wavelength, and common anode configuration. Dimensional variations are within acceptable tolerances for PCB mounting and visual integration.

Parameter Comparison

Engineering Selection Recommendations

The LDQ-M512RI is a direct functional substitute for the HDSP-B42G. The Lumex part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete Broadcom device.

Both parts comply with REACH regulations and carry EAR99 ECCN classification. The LDQ-M512RI holds RoHS3 compliance, providing additional environmental and regulatory alignment for modern manufacturing standards.

The test current differential (10mA for LDQ-M512RI versus 20mA for HDSP-B42G) reflects improved LED efficiency in the Lumex design. The higher millicandela rating (3.9mcd versus 3.2mcd) indicates enhanced brightness performance. These characteristics make the LDQ-M512RI suitable for direct replacement in existing circuit designs without modification to drive circuitry, provided the application tolerates the lower current draw and increased brightness.

Frequently Asked Questions (FAQ)

Q: Can the LDQ-M512RI replace the HDSP-B42G in existing PCB designs?

A: Yes. Both parts use identical 12-DIP package footprints with 0.600" (15.24mm) pitch. Pin-to-pin compatibility is maintained through matching common anode configuration. Physical dimensions are within acceptable tolerances for standard PCB mounting.

Q: What is the impact of the 10mA test current in the LDQ-M512RI versus the 20mA in the HDSP-B42G?

A: The LDQ-M512RI operates at half the test current while delivering higher brightness (3.9mcd versus 3.2mcd). This reflects superior LED efficiency. Existing drive circuits designed for 20mA operation will function with the LDQ-M512RI; the substitute will draw less current and produce brighter output.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are REACH compliant and carry EAR99 ECCN classification. The LDQ-M512RI additionally holds RoHS3 compliance, meeting current environmental standards. The HDSP-B42G, being obsolete, may not meet modern regulatory requirements for new designs.

Q: What are the dimensional differences between these displays?

A: Height and width differ slightly (HDSP-B42G: 0.752" H x 2.016" W; LDQ-M512RI: 0.748" H x 1.980" W). Depth is identical at 0.315". These variations are within standard PCB layout tolerances and do not affect functional compatibility or visual integration in typical applications.

Q: Why is the HDSP-B42G classified as obsolete?

A: Broadcom has discontinued this product line. The LDQ-M512RI from Lumex maintains active production status, making it the appropriate choice for new designs and ongoing supply requirements.