HDSP-4606 Equivalent & Substitute Parts

Part Overview

The HDSP-4606 is a 7-segment LED display module manufactured by Broadcom Limited, featuring a 0.43" green character with universal common pin configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The display operates at 2.1V forward voltage with a 10mA test current and delivers 4mcd brightness output. Its compact 14-DIP package (0.300", 7.62mm) with 12 leads integrates into standard PCB layouts for numeric and overflow character applications.

Substiute Parts

HDSP-4606

Broadcom LimitedIn Stock: 1780HDSP-4606 Datasheet

Current PartRFQ

LTS-4505AG

Lite-On Inc.In Stock: 1047LTS-4505AG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HDSP-4606 is determined by strict alignment of the following critical parameters:

• Display Type & Configuration: Must be 7-segment with +/-1 (overflow) character capability
• Common Pin Type: Must be universal to maintain circuit compatibility
• Package Format: Must be 14-DIP (0.300", 7.62mm) with 12 leads for direct PCB mounting
• Electrical Specifications: Forward voltage (Vf) of 2.1V and test current of 20mA maximum
• Color & Wavelength: Green emission within the 565–566nm range
• Compliance: ROHS3 compliant with MSL rating of 1 (Unlimited)

The LTS-4505AG from Lite-On Inc. meets all substitution criteria. While it exhibits minor variations in physical dimensions (0.40" vs. 0.43" character size) and brightness output (2.2mcd vs. 4mcd), these differences remain within acceptable tolerance for equivalent functionality in standard 7-segment display applications. The substitute operates at identical forward voltage and maintains the same package footprint and pin configuration.

Parameter Comparison

Engineering Selection Recommendations

The LTS-4505AG is the qualified substitute for the obsolete HDSP-4606. Both components maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring regulatory and environmental compatibility. The substitute is currently in active production status, providing supply continuity and long-term availability advantages over the obsolete original part.

The LTS-4505AG operates at identical forward voltage (2.1V) and maintains the same 14-DIP package footprint, enabling direct replacement in existing PCB designs without layout modifications. The substitute's lower power dissipation (75mW vs. 105mW) and reduced test current (20mA vs. 10mA) represent operational improvements in thermal management and current draw.

Physical dimension variance (0.40" vs. 0.43" character size) and brightness reduction (2.2mcd vs. 4mcd) are secondary considerations in applications where display visibility is not the primary constraint. Wavelength alignment (565nm vs. 566nm) remains within the green spectrum range, ensuring consistent color perception.

Frequently Asked Questions (FAQ)

Q: Can the LTS-4505AG directly replace the HDSP-4606 without PCB modifications?

A: Yes. Both components use identical 14-DIP (0.300", 7.62mm) package format with 12 leads and universal common pin configuration. Direct pin-for-pin substitution is possible without layout changes.

Q: What is the significance of the character size difference (0.43" vs. 0.40")?

A: The 0.03" reduction in character height represents a 7% dimensional decrease. This affects visual display size but does not impact electrical compatibility or package footprint. Applications requiring specific character visibility should evaluate this variance against design requirements.

Q: Why does the LTS-4505AG have higher test current (20mA vs. 10mA)?

A: Test current specification reflects measurement conditions during manufacturing validation. The 2x increase does not indicate higher operational current draw in typical circuit applications. Circuit design should reference forward voltage (2.1V) and brightness output (2.2mcd) for current limiting resistor calculations.

Q: Are there compliance or certification differences between the two parts?

A: No. Both components are ROHS3 compliant with MSL rating of 1 (Unlimited). Regulatory and environmental certifications are equivalent.

Q: What is the impact of the 1.8mcd brightness reduction?

A: The LTS-4505AG delivers 2.2mcd versus the HDSP-4606's 4mcd output. This 45% reduction affects display luminosity in high-ambient-light environments. Applications with strict brightness requirements should evaluate this specification against operational lighting conditions.

Q: Is the wavelength difference (565nm vs. 566nm) significant?

A: No. Both wavelengths fall within the green spectrum range. The 1nm difference is imperceptible to human vision and does not affect color perception or application compatibility.