LTS-3403LP 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LTS-3403LP is a single-character red 7-segment LED display module in 18-DIP packaging manufactured by Lite-On Inc. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The display operates as a common cathode configuration with a 0.80-inch character size, suitable for numeric and alphanumeric display applications requiring standard DIP package compatibility.

Substiute Parts

LTS-3403LP

Lite-On Inc.In Stock: 750LTS-3403LP Datasheet

Current PartRFQ

LTS-3403JR

Lite-On Inc.In Stock: 743LTS-3403JR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTS-3403LP is determined by strict alignment of the following critical parameters:

• Display Type: 7-Segment configuration
• Number of Characters: Single character
• Common Pin Configuration: Common Cathode
• Color: Red
• Package / Case: 18-DIP (0.600", 15.24mm), 13 Leads
• Physical Dimensions: 1.090" H x 0.783" W x 0.330" D
• Character Size: 0.80" (20.32mm)

The LTS-3403JR qualifies as a manufacturer-recommended substitute. Both parts share identical mechanical specifications, packaging, pinout configuration, and functional classification. Electrical parameters including forward voltage, test current, and power dissipation remain within compatible operating ranges for standard display applications.

Parameter Comparison

Engineering Selection Recommendations

The LTS-3403JR is the manufacturer-recommended substitute for the obsolete LTS-3403LP. Both components are manufactured by Lite-On Inc. and maintain identical mechanical compatibility, pinout configuration, and package specifications.

The LTS-3403JR offers the advantage of active product status, ensuring continued availability and supply chain reliability. The substitute part is RoHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Electrical parameter variations between the two parts are within acceptable tolerances for standard 7-segment display applications. The forward voltage difference of 0.1V and the wavelength shift from 697nm to 639nm represent minor variations typical of LED manufacturing evolution. The increased maximum power dissipation specification of the LTS-3403JR (70mW versus 40mW) reflects updated thermal characterization and does not indicate incompatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the LTS-3403JR be used as a direct replacement for the LTS-3403LP in existing designs?

A: Yes. Both parts share identical package specifications (18-DIP), physical dimensions, pinout configuration, and common cathode operation. No circuit board modifications or design changes are required for substitution.

Q: What is the significance of the wavelength difference between the two parts?

A: The LTS-3403LP operates at 697nm (red) while the LTS-3403JR operates at 639nm (red-orange). Both wavelengths fall within the red spectrum classification. Visual appearance may show a slight color shift, but both parts are functionally compatible with standard red LED display applications.

Q: Why does the LTS-3403JR have a higher maximum power dissipation rating?

A: The increased power dissipation specification (70mW versus 40mW) reflects updated thermal characterization standards and manufacturing improvements. This does not indicate the part consumes more power during normal operation at the specified 20mA test current. The higher rating provides additional thermal margin for circuit design.

Q: Is the LTS-3403JR RoHS compliant?

A: Yes. The LTS-3403JR is RoHS3 compliant, meeting current environmental regulations for hazardous substance restrictions in electronic components.

Q: What is the moisture sensitivity level for both parts?

A: Both the LTS-3403LP and LTS-3403JR carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.