LDS-A354RI 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The LDS-A354RI is a single-character, 0.30-inch red 7-segment LED display manufactured by Lumex Opto/Components Inc. This common anode display module operates at 2V forward voltage with a 10mA test current and is housed in a 10-DIP package. The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits electrical parameter variations within acceptable operating ranges. The substitute parts listed maintain functional compatibility through matching display type, character count, common pin configuration, package form factor, and digit size specifications.

Substiute Parts

LDS-A354RI

Lumex Opto/Components Inc.In Stock: 1065LDS-A354RI Datasheet

Current PartRFQ

HDSP-A101

Broadcom LimitedIn Stock: 1648HDSP-A101 Datasheet

SimilarRFQ

HDSP-A151

Broadcom LimitedIn Stock: 2385HDSP-A151 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LDS-A354RI is determined by strict adherence to the following core parameters:

Mandatory Matching Parameters:

• Display Type: 7-Segment (required for functional equivalence)
• Number of Characters: 1 (required for form factor compatibility)
• Digit/Alpha Size: 0.30 inches / 7.62mm (required for visual consistency)
• Common Pin Configuration: Common Anode (required for circuit compatibility)
• Color: Red (required for optical specification)
• Package / Case: 10-DIP (0.200", 5.08mm) (required for PCB footprint compatibility)

Allowable Parameter Variations: Substitute parts may differ in the following electrical parameters while maintaining functional compatibility:

• Voltage - Forward (Vf): Range 1.7V to 2.0V (within typical LED forward voltage tolerance)
• Current - Test: Range 5mA to 20mA (within standard LED operating current range)
• Millicandela Rating: 2.5mcd to 14mcd (brightness variation acceptable for display applications)
• Wavelength - Peak: 635nm to 645nm (within red spectrum range)
• Power Dissipation (Max): 37mW to 105mW (within thermal design margins)
• Physical Depth Dimension: 0.240" to 0.390" (within PCB clearance tolerance for 10-DIP package)

Compliance Requirements: All substitute parts must maintain RoHS3 compliance and MSL 1 rating to ensure environmental and reliability standards equivalence.

Parameter Comparison

Engineering Selection Recommendations

HDSP-A101 Substitution Considerations:

The HDSP-A101 (Broadcom Limited) maintains full functional compatibility with the LDS-A354RI across all mandatory parameters. This substitute operates at a lower forward voltage (1.7V versus 2.0V) and reduced test current (5mA versus 10mA), resulting in significantly lower power dissipation (37mW versus 105mW). The HDSP-A101 exhibits higher brightness per unit current (3.6mcd at 5mA) compared to the LDS-A354RI (2.5mcd at 10mA). The wavelength peak shifts from 635nm to 645nm, remaining within the red spectrum range. Physical depth increases from 0.240" to 0.390", requiring verification of available PCB clearance in the vertical direction. Both parts maintain RoHS3 compliance and MSL 1 rating. Product status is Active for both manufacturers.

HDSP-A151 Substitution Considerations:

The HDSP-A151 (Broadcom Limited) maintains full functional compatibility with the LDS-A354RI across all mandatory parameters. This substitute operates at a slightly lower forward voltage (1.8V versus 2.0V) and elevated test current (20mA versus 10mA), resulting in comparable power dissipation (96mW versus 105mW). The HDSP-A151 exhibits significantly higher brightness (14mcd at 20mA) compared to the LDS-A354RI (2.5mcd at 10mA). The wavelength peak shifts from 635nm to 645nm, remaining within the red spectrum range. Physical dimensions match the LDS-A354RI in height and depth (0.500" x 0.240"), with width increasing marginally from 0.299" to 0.300". Both parts maintain RoHS3 compliance and MSL 1 rating. Product status is Active for both manufacturers.

Compliance and Certification Equivalence:

All three parts (LDS-A354RI, HDSP-A101, HDSP-A151) are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. All parts are classified as Active product status. REACH status is Unaffected for all three parts. ECCN classification is EAR99 for all three parts. HTSUS code is 8541.41.0000 for all three parts.

Frequently Asked Questions (FAQ)

Q1: Can the HDSP-A101 be used as a direct replacement for the LDS-A354RI in all applications?

A: The HDSP-A101 is functionally compatible with the LDS-A354RI for 7-segment display applications requiring common anode configuration, 0.30-inch digit size, and 10-DIP package form factor. The primary design consideration is the increased physical depth (0.390" versus 0.240"), which requires verification of available vertical clearance on the PCB. The lower forward voltage (1.7V) and reduced test current (5mA) may require circuit design adjustments if the original design relied on specific current-limiting resistor values. The higher brightness per unit current (3.6mcd at 5mA) may result in increased display visibility.

Q2: What are the key differences between HDSP-A101 and HDSP-A151?

A: Both HDSP-A101 and HDSP-A151 are Broadcom Limited products with identical display type, character count, digit size, common pin configuration, color, and package specifications. The HDSP-A101 operates at 1.7V with 5mA test current and 3.6mcd brightness. The HDSP-A151 operates at 1.8V with 20mA test current and 14mcd brightness. The HDSP-A151 provides approximately 4 times greater brightness output. Physical depth differs: HDSP-A101 is 0.390" deep, while HDSP-A151 is 0.240" deep (matching the LDS-A354RI). Selection between these two substitutes depends on brightness requirements and available PCB clearance.

Q3: Are there any packaging differences between the substitute parts?

A: The LDS-A354RI is supplied in standard packaging (not specified). The HDSP-A101 is supplied in Tube packaging. The HDSP-A151 is supplied in Bulk packaging. These packaging differences affect handling, storage, and quantity per container but do not affect the electrical or mechanical specifications of the individual components.

Q4: Do all three parts meet the same environmental and compliance standards?

A: Yes. The LDS-A354RI, HDSP-A101, and HDSP-A151 all maintain RoHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, REACH Unaffected status, EAR99 ECCN classification, and 8541.41.0000 HTSUS code. All three parts are classified as Active product status.

Q5: What is the wavelength difference between the LDS-A354RI and the Broadcom substitutes?

A: The LDS-A354RI has a peak wavelength of 635nm. Both HDSP-A101 and HDSP-A151 have peak wavelengths of 645nm. Both wavelengths fall within the red spectrum range. The 10nm difference may result in a slightly different shade of red, but both are classified as red LEDs for display applications.

Q6: Which substitute part is most suitable for low-power applications?

A: The HDSP-A101 is the most suitable for low-power applications, with a maximum power dissipation of 37mW (compared to 105mW for the LDS-A354RI and 96mW for the HDSP-A151). The HDSP-A101 operates at the lowest forward voltage (1.7V) and test current (5mA), making it ideal for battery-powered or energy-constrained designs.

Q7: Which substitute part provides the highest brightness?

A: The HDSP-A151 provides the highest brightness at 14mcd (compared to 2.5mcd for the LDS-A354RI and 3.6mcd for the HDSP-A101). The HDSP-A151 is suitable for applications requiring high visibility or operation in bright ambient light conditions.

Q8: Are there any circuit design considerations when substituting these parts?

A: Yes. The forward voltage differences (1.7V to 2.0V) may require adjustment of current-limiting resistor values in the circuit design. The test current range (5mA to 20mA) affects power supply requirements and thermal design. The brightness variation (2.5mcd to 14mcd) may impact visual performance. All three parts maintain the same 10-DIP package pinout and common anode configuration, ensuring PCB footprint compatibility. Physical depth variations (0.240" to 0.390") require verification of available vertical clearance.