LTS-5501AC 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LTS-5501AC is a single-character red 7-segment LED display module manufactured by Lite-On Inc. in a 10-DIP package configuration. This display is designed for numeric and alphanumeric applications requiring a 0.56-inch character height with common anode configuration. The part is currently in active production status with 686 units available in inventory. Alternative equivalent parts may be required due to supply availability, lead time considerations, or specific application requirements within the defined electrical and mechanical parameters.

Substiute Parts

LTS-5501AC

Lite-On Inc.In Stock: 709LTS-5501AC Datasheet

Current PartRFQ

HDSP-H151

Broadcom LimitedIn Stock: 1764HDSP-H151 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTS-5501AC is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Display Type: 7-Segment LED
• Number of Characters: 1
• Character Height: 0.56" (14.22mm)
• Common Pin Configuration: Common Anode
• Color: Red
• Forward Voltage (Vf): 1.8V
• Test Current: 20mA
• Package Type: 10-DIP (0.600", 15.24mm)
• Physical Dimensions: Compatible within tolerance to 0.673" H x 0.488" W x 0.315" D

Allowable Variation Parameters:

• Millicandela Rating: May vary based on application brightness requirements
• Wavelength - Peak: May vary within red spectrum (645nm to 660nm range)
• Power Dissipation (Max): May vary within acceptable thermal design limits
• Inventory availability and packaging format

The HDSP-H151 manufactured by Broadcom Limited meets all mandatory matching parameters and is classified as a manufacturer-recommended equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the LTS-5501AC and HDSP-H151 are active production components with ROHS3 compliance certification, ensuring regulatory compliance for current and future applications. The HDSP-H151 is designated as the manufacturer-recommended equivalent substitute and maintains full electrical and mechanical compatibility with the LTS-5501AC within the 10-DIP package footprint.

Selection between these parts should be based on:

• Supply Chain Availability: Current inventory levels (LTS-5501AC: 686 units; HDSP-H151: 1690 units)
• Lead Time Requirements: Broadcom HDSP-H151 availability may provide shorter procurement cycles
• Brightness Requirements: HDSP-H151 provides higher luminous intensity (16mcd vs. 7.5mcd), suitable for applications requiring enhanced visibility
• Thermal Design Considerations: HDSP-H151 maximum power dissipation of 96mW versus 75mW for LTS-5501AC requires verification within circuit design thermal budgets
• Wavelength Specification: Peak wavelength variation (645nm vs. 660nm) remains within red spectrum and is acceptable for standard numeric display applications

Both parts maintain identical forward voltage, test current, and package specifications, ensuring direct PCB footprint compatibility and driver circuit interchangeability.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-H151 be used as a direct replacement for the LTS-5501AC on existing PCBs?

A: Yes. The HDSP-H151 maintains identical 10-DIP package dimensions, pin spacing (0.600", 15.24mm), forward voltage (1.8V), and test current (20mA) specifications. Physical dimensions are compatible within manufacturing tolerance. No PCB redesign is required.

Q: What is the difference in brightness between these two displays?

A: The HDSP-H151 provides 16mcd luminous intensity compared to 7.5mcd for the LTS-5501AC. This represents a higher brightness output suitable for applications requiring enhanced visibility in ambient light conditions. Circuit current limiting resistor values may require adjustment to maintain consistent brightness perception.

Q: Are there differences in wavelength that affect color appearance?

A: The LTS-5501AC operates at 660nm peak wavelength while the HDSP-H151 operates at 645nm. Both wavelengths fall within the red spectrum and produce visually equivalent red color appearance in standard numeric display applications. Wavelength differences are not perceptible in typical end-user applications.

Q: What are the thermal design implications of the power dissipation difference?

A: The HDSP-H151 maximum power dissipation is 96mW compared to 75mW for the LTS-5501AC. This 21mW difference is negligible in most circuit designs. Thermal design verification is required only in high-density display arrays or applications with severe thermal constraints.

Q: Are both parts RoHS compliant?

A: Yes. Both the LTS-5501AC and HDSP-H151 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What packaging formats are available for these parts?

A: The LTS-5501AC is available in standard DIP packaging. The HDSP-H151 is supplied in tube packaging format. Both maintain identical component specifications and electrical characteristics.