LDS-A355RI 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The LDS-A355RI is a single-character, 0.30-inch red 7-segment LED display manufactured by Lumex Opto/Components Inc. in a 10-DIP package configuration. This display module operates as a common anode device with a typical forward voltage of 2V and test current of 10mA, designed for numeric and alphanumeric display applications. The product maintains Active status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified based on matching display type, character count, common anode configuration, package format, and electrical operating parameters within acceptable tolerance ranges for direct circuit board replacement.

Substiute Parts

LDS-A355RI

Lumex Opto/Components Inc.In Stock: 667LDS-A355RI Datasheet

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HDSP-A101

Broadcom LimitedIn Stock: 1648HDSP-A101 Datasheet

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HDSP-A151

Broadcom LimitedIn Stock: 2385HDSP-A151 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Equivalent and substitute parts for the LDS-A355RI are identified based on the following critical parameters that must match or fall within acceptable operating ranges:

Mandatory Matching Parameters:

• Display Type: 7-Segment (numeric and alphanumeric capable)
• Number of Characters: 1 (single character display)
• Common Pin Configuration: Common Anode (identical circuit interface)
• Package Type: 10-DIP (0.200", 5.08mm) (identical PCB footprint and pin count)
• Color: Red (visual and wavelength compatibility)
• Character Size: 0.30 inches (7.62mm) (form factor compatibility)

Acceptable Parameter Variation Ranges:

• Voltage - Forward (Vf): 1.7V to 2.0V (within typical LED forward voltage tolerance for red LEDs)
• Current - Test: 5mA to 20mA (acceptable operating current range for common anode 7-segment displays)
• Power Dissipation: 37mW to 105mW (proportional to current and voltage variations)
• Millicandela Rating: 0.5mcd to 14mcd (brightness variation acceptable for equivalent substitution)
• Wavelength - Peak: 645nm to 700nm (red spectrum range for visual compatibility)
• Physical Depth Dimension: 6.09mm to 9.91mm (PCB clearance tolerance for 10-DIP package)

Compliance Requirements:

• RoHS3 Compliant (mandatory for equivalent substitution)
• Moisture Sensitivity Level 1 (Unlimited) (matching storage and handling requirements)
• REACH Unaffected status (regulatory equivalence)

The HDSP-A101 and HDSP-A151 manufactured by Broadcom Limited satisfy all mandatory matching parameters and fall within acceptable variation ranges for electrical and physical characteristics, qualifying them as direct substitutes for the LDS-A355RI in common anode 7-segment display applications.

Parameter Comparison

Engineering Selection Recommendations

LDS-A355RI (Primary Part): The LDS-A355RI remains the primary selection when original Lumex specification is required. This part is Active status with full RoHS3 compliance, MSL 1 rating, and REACH unaffected designation. The 2.0V forward voltage and 10mA test current establish the baseline electrical operating point. Power dissipation of 105mW and 0.5mcd brightness rating define the performance envelope for this device.

HDSP-A101 (Broadcom - Lower Power Alternative): The HDSP-A101 qualifies as a substitute when reduced power consumption is acceptable. This part operates at 1.7V forward voltage with 5mA test current, resulting in 37mW maximum power dissipation—approximately 35% lower than the LDS-A355RI. The HDSP-A101 provides 3.6mcd brightness, representing a 7x increase in luminous intensity. Physical depth is 9.91mm compared to 6.10mm for the LDS-A355RI; circuit board clearance must be verified for applications with space constraints. All compliance certifications (RoHS3, MSL 1, REACH unaffected) match the primary part. Packaging is supplied in Tube format.

HDSP-A151 (Broadcom - Higher Brightness Alternative): The HDSP-A151 qualifies as a substitute when increased brightness is required. This part operates at 1.8V forward voltage with 20mA test current, resulting in 96mW maximum power dissipation. The HDSP-A151 provides 14mcd brightness, representing a 28x increase in luminous intensity compared to the LDS-A355RI. Physical dimensions are 12.70 x 7.62 x 6.09mm, matching the depth profile of the LDS-A355RI (6.09mm vs. 6.10mm). All compliance certifications (RoHS3, MSL 1, REACH unaffected) match the primary part. Packaging is supplied in Bulk format. The HDSP-A151 belongs to the HDSP-A15x series designation.

Substitution Basis: All three parts share identical 10-DIP package footprint, common anode configuration, single-character 0.30-inch 7-segment display type, and red color specification. Forward voltage variations (1.7V to 2.0V) and current variations (5mA to 20mA) fall within standard operating ranges for red LED displays. Wavelength peak variations (645nm to 700nm) remain within the red spectrum. All parts maintain Active product status with equivalent regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-A101 be used as a direct replacement for the LDS-A355RI without circuit modification?

A: The HDSP-A101 shares identical 10-DIP package footprint and common anode pin configuration, enabling direct PCB placement. However, the lower forward voltage (1.7V vs. 2.0V) and reduced test current (5mA vs. 10mA) require circuit current-limiting resistor recalculation. The series resistor value must be adjusted to maintain appropriate segment brightness in the application. Physical depth of 9.91mm (vs. 6.10mm) must be verified for PCB clearance compatibility.

Q: What is the primary difference between HDSP-A101 and HDSP-A151?

A: The HDSP-A101 is optimized for low-power applications with 1.7V forward voltage, 5mA test current, and 37mW maximum power dissipation. The HDSP-A151 is optimized for high-brightness applications with 1.8V forward voltage, 20mA test current, and 96mW maximum power dissipation. The HDSP-A151 provides 14mcd brightness compared to 3.6mcd for the HDSP-A101. Both parts maintain identical 10-DIP package footprint and common anode configuration.

Q: Are all three parts RoHS3 compliant?

A: Yes. The LDS-A355RI, HDSP-A101, and HDSP-A151 are all ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status. All three parts meet equivalent regulatory requirements for substitution in applications requiring RoHS3 certification.

Q: What is the wavelength difference between the LDS-A355RI and Broadcom substitutes?

A: The LDS-A355RI has a peak wavelength of 700nm (standard red). The HDSP-A101 and HDSP-A151 have peak wavelengths of 645nm (orange-red). Both wavelengths fall within the red spectrum and are visually compatible for numeric display applications. The 645nm wavelength may appear slightly more orange-tinted compared to the 700nm standard red.

Q: Which substitute part should be selected for space-constrained applications?

A: The HDSP-A151 is recommended for space-constrained applications. Physical depth is 6.09mm, matching the LDS-A355RI depth of 6.10mm. The HDSP-A101 has a depth of 9.91mm and requires additional PCB clearance verification.

Q: Can the HDSP-A151 be used in applications originally designed for the LDS-A355RI?

A: The HDSP-A151 can be used as a substitute when the application circuit is designed to accommodate the higher test current (20mA vs. 10mA) and slightly lower forward voltage (1.8V vs. 2.0V). The series current-limiting resistor must be recalculated. The increased brightness (14mcd vs. 0.5mcd) may require optical filtering or brightness control in applications sensitive to display intensity. Physical dimensions are compatible (depth 6.09mm vs. 6.10mm).

Q: What packaging formats are available for the substitute parts?

A: The HDSP-A101 is supplied in Tube packaging. The HDSP-A151 is supplied in Bulk packaging. The LDS-A355RI packaging format is not specified in the provided data. Packaging selection should be based on production volume and inventory management requirements.

Q: Are the pin configurations identical between all three parts?

A: Yes. All three parts use 10-DIP (0.200", 5.08mm) package format with common anode configuration. Pin-to-pin compatibility is confirmed for direct PCB replacement without layout modification.