HDSP-316H 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The HDSP-316H is a single-character red 7-segment LED display manufactured by Broadcom Limited, housed in a 10-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The display operates at 1.8V forward voltage with a 1mA test current and provides 0.65mcd brightness output at a 645nm peak wavelength. Substitutes must maintain mechanical compatibility with the 10-DIP (0.300", 7.62mm) package and preserve the common cathode configuration while accommodating variations in electrical performance parameters.

Substiute Parts

HDSP-316H

Broadcom LimitedIn Stock: 1337HDSP-316H Datasheet

Current PartRFQ

HDSP-303A

Broadcom LimitedIn Stock: 749HDSP-303A Datasheet

MFR RecommendedRFQ

LDS-C3905RI

Lumex Opto/Components Inc.In Stock: 1007LDS-C3905RI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HDSP-316H is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

• Package / Case: 10-DIP (0.300", 7.62mm) — physical footprint must match for PCB mounting
• Display Type: 7-Segment — functional configuration requirement
• Number of Characters: 1 — single character display
• Common Pin Configuration: Common Cathode — electrical interface requirement
• Color: Red — optical specification
• Digit/Alpha Size: 0.40" (10.16mm) — visual size tolerance

Allowable Variation Parameters:

• Voltage - Forward (Vf) Typical: 1.8V to 2.0V — acceptable range for common cathode red LEDs
• Current - Test: 1mA to 20mA — operational current may vary based on brightness and design
• Millicandela Rating: 0.45mcd to 0.65mcd — brightness variation acceptable within application tolerance
• Wavelength - Peak: 645nm to 700nm — red spectrum variation acceptable
• Power Dissipation (Max): 37mW to 105mW — thermal performance variation acceptable

Substitute parts must satisfy all mandatory parameters while remaining within allowable variation ranges for electrical and optical characteristics.

Parameter Comparison

Engineering Selection Recommendations

HDSP-303A (Broadcom Limited)

The HDSP-303A is the manufacturer-recommended substitute for the obsolete HDSP-316H. Both components are manufactured by Broadcom Limited and share identical package, physical dimensions, and forward voltage specifications. The HDSP-303A maintains active product status, ensuring ongoing availability and supply chain continuity. The primary electrical difference is the increased test current (20mA versus 1mA), which results in lower brightness output (0.45mcd versus 0.65mcd) and a wavelength shift to 660nm. This substitute is suitable for applications where the original brightness specification can be accommodated through circuit design adjustments. RoHS3 compliance provides environmental regulatory alignment for new designs.

LDS-C3905RI (Lumex Opto/Components Inc.)

The LDS-C3905RI provides an alternative substitute from a different manufacturer with active product status. Physical dimensions show minor variations (0.512" H x 0.394" W versus 0.504" H x 0.382" W), and the digit size is slightly smaller at 0.39" compared to 0.40". The forward voltage is elevated to 2.0V, and the test current is 10mA. Peak wavelength extends to 700nm, and maximum power dissipation increases to 105mW. This substitute is suitable for applications where the minor dimensional and electrical variations are acceptable and where alternative sourcing from Lumex is preferred. RoHS3 compliance is provided.

Both substitutes maintain the 10-DIP package footprint, common cathode configuration, and single-character 7-segment display type required for mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-303A be used as a direct replacement for the HDSP-316H without circuit modifications?

A: The HDSP-303A shares the same package, physical dimensions, and forward voltage as the HDSP-316H. However, the test current specification increases from 1mA to 20mA, which affects brightness output. Circuit design adjustments to current-limiting resistors may be necessary to achieve desired brightness levels in the application.

Q: What is the primary reason for substituting the HDSP-316H?

A: The HDSP-316H is classified as obsolete. Substitution is necessary to ensure component availability for new designs and ongoing production support. Both recommended substitutes maintain active product status.

Q: Are there dimensional differences between the HDSP-316H and LDS-C3905RI?

A: Yes. The LDS-C3905RI has slightly larger overall dimensions (0.512" H x 0.394" W versus 0.504" H x 0.382" W) and a marginally smaller digit size (0.39" versus 0.40"). These variations are minor but should be evaluated for PCB layout and visual display requirements in the specific application.

Q: Do all substitute parts maintain the same package footprint?

A: Yes. Both HDSP-303A and LDS-C3905RI use the 10-DIP (0.300", 7.62mm) package, ensuring PCB mounting compatibility with the original HDSP-316H.

Q: What is the wavelength difference between the main part and substitutes?

A: The HDSP-316H operates at 645nm peak wavelength. The HDSP-303A shifts to 660nm, and the LDS-C3905RI extends to 700nm. All three remain within the red spectrum. Wavelength differences may be perceptible in applications where color consistency is critical.

Q: Are both substitutes RoHS compliant?

A: Yes. Both HDSP-303A and LDS-C3905RI are RoHS3 compliant. The original HDSP-316H does not specify RoHS status, but both substitutes provide environmental regulatory alignment for new designs.

Q: What is the brightness difference between the main part and substitutes?

A: The HDSP-316H provides 0.65mcd brightness. The HDSP-303A provides 0.45mcd, and the LDS-C3905RI provides 0.5mcd. Brightness variations are determined by test current and LED design. Circuit design adjustments may be necessary to achieve desired brightness levels.

Q: Can the LDS-C3905RI be used interchangeably with the HDSP-303A?

A: Both parts are mechanically and electrically compatible substitutes for the HDSP-316H. However, they differ in forward voltage (1.8V versus 2.0V), test current (20mA versus 10mA), brightness (0.45mcd versus 0.5mcd), and power dissipation (37mW versus 105mW). Selection between these two substitutes depends on specific application requirements for brightness, power consumption, and voltage tolerance.