LTS-4301P Equivalent & Substitute Parts

Part Overview

The LTS-4301P is a single-character red 7-segment LED display module manufactured by Lite-On Inc., packaged in a 10-DIP (0.300", 7.62mm) configuration. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The display operates at 2.1V forward voltage with a 20mA test current and provides 0.8mcd brightness output at a 697nm peak wavelength.

Substiute Parts

LTS-4301P

Lite-On Inc.In Stock: 1054LTS-4301P Datasheet

Current PartRFQ

HDSP-F203

Broadcom LimitedIn Stock: 1425HDSP-F203 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTS-4301P is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Display Type: 7-Segment configuration
• Number of Characters: Single character
• Common Pin Configuration: Common Cathode
• Color: Red
• Package / Case: 10-DIP (0.300", 7.62mm)

Allowable Parameter Variance:

• Digit/Alpha Size: ±0.01" tolerance (0.39" nominal)
• Voltage - Forward (Vf): ±0.1V variance (2.1V nominal)
• Current - Test: Fixed at 20mA
• Millicandela Rating: Higher values acceptable
• Wavelength - Peak: Red spectrum range (635nm–697nm)
• Power Dissipation: Higher ratings acceptable
• Physical Dimensions: Minor variations within package constraints

The HDSP-F203 manufactured by Broadcom Limited meets all mandatory matching criteria and falls within allowable parameter variance ranges, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The HDSP-F203 is the qualified substitute for the obsolete LTS-4301P based on the following engineering criteria:

Product Status Alignment: The LTS-4301P is obsolete, while the HDSP-F203 maintains active product status with confirmed inventory availability (1382 pcs), ensuring long-term supply chain viability for new designs and system replacements.

Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements. The HDSP-F203 additionally carries REACH Unaffected status, providing expanded compliance documentation for regulated applications.

Electrical Compatibility: The HDSP-F203 operates within the specified electrical envelope of the LTS-4301P. The 0.1V forward voltage reduction (2.1V to 2V) and increased brightness output (0.8mcd to 1.2mcd) represent performance improvements rather than deviations, with no adverse impact on circuit operation.

Mechanical Compatibility: Both components utilize identical 10-DIP packaging with matching pin spacing (0.300", 7.62mm). Physical dimension variations remain within acceptable tolerance ranges for PCB mounting and mechanical clearance.

Wavelength Consideration: The HDSP-F203 operates at 635nm (pure red) compared to the LTS-4301P at 697nm (deep red). Both wavelengths fall within the red spectrum; however, visual color perception may differ slightly in applications requiring specific hue matching.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-F203 be used as a direct replacement for the LTS-4301P in existing designs?

A: Yes. The HDSP-F203 is electrically and mechanically compatible with the LTS-4301P. Both components share identical 10-DIP packaging, common cathode configuration, and operate at the same 20mA test current. No circuit modifications are required for substitution.

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

A: The HDSP-F203 provides 1.2mcd brightness compared to the LTS-4301P at 0.8mcd. This represents a 50% increase in light output, which may be beneficial for visibility in high-ambient-light environments but should be considered if the original design relied on specific brightness levels for optical filtering or user interface consistency.

Q: Why does the wavelength differ between the two parts?

A: The LTS-4301P operates at 697nm (deep red), while the HDSP-F203 operates at 635nm (pure red). Both wavelengths are within the red spectrum. The difference reflects manufacturing process variations between Lite-On and Broadcom. In applications where specific color matching is critical (such as indicator panels with color-coded displays), this wavelength shift should be evaluated.

Q: Are there any thermal or power dissipation concerns when substituting the HDSP-F203?

A: The HDSP-F203 has a maximum power dissipation rating of 105mW compared to the LTS-4301P at 40mW. This higher rating reflects the increased brightness capability and does not indicate higher actual power consumption under standard 20mA operation. Thermal management remains equivalent to the original design.

Q: What is the packaging difference between these components?

A: Both components use 10-DIP (0.300", 7.62mm) packaging. The LTS-4301P ships in standard packaging, while the HDSP-F203 is supplied in tube packaging. This difference affects handling and storage but does not impact electrical or mechanical compatibility.

Q: Is the HDSP-F203 suitable for new product designs?

A: Yes. The HDSP-F203 maintains active product status with confirmed inventory availability, making it the appropriate choice for new designs requiring single-character red 7-segment displays in 10-DIP configuration. The LTS-4301P, being obsolete, should not be specified for new designs.