LTC-4624Y Equivalent & Substitute Parts

Part Overview

The LTC-4624Y is a 3-character, 7-segment LED display module manufactured by Lite-On Inc. with a 0.39" digit height and yellow color output. This component features a common anode configuration with a forward voltage of 2.1V and operates at 20mA test current. The product is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

LTC-4624Y

Lite-On Inc.In Stock: 983LTC-4624Y Datasheet

Current PartRFQ

LTC-4624JS

Lite-On Inc.In Stock: 816LTC-4624JS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTC-4624Y is determined by the following critical parameters:

• Display Configuration: 3-character, 7-segment format with common anode topology
• Physical Compatibility: Digit height of 0.39" (10.00mm) and overall dimensions of 0.504" H x 1.182" W x 0.276" D
• Electrical Characteristics: Forward voltage range, test current of 20mA, and wavelength in the yellow spectrum (585nm nominal)
• Package Type: DIP package with lead count and pitch compatibility

The LTC-4624JS qualifies as a manufacturer-recommended substitute based on matching the core display configuration, physical dimensions, character count, digit size, common anode topology, and yellow color specification. Both parts share the same base product number (LTC-4624) and are manufactured by Lite-On Inc.

Parameter Comparison

Engineering Selection Recommendations

The LTC-4624JS is the manufacturer-recommended substitute for the obsolete LTC-4624Y. Selection of the LTC-4624JS provides the following advantages:

• Active Product Status: The LTC-4624JS maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete LTC-4624Y.
• Regulatory Compliance: The LTC-4624JS carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic components.
• Electrical Compatibility: Both parts operate at 20mA test current with forward voltages within 0.05V of each other (2.1V vs. 2.05V), maintaining functional compatibility in most circuit applications.
• Physical Interchangeability: Identical physical dimensions and digit height ensure mechanical fit within existing PCB layouts and mechanical assemblies.
• Display Configuration Match: Both parts feature identical 3-character, 7-segment common anode architecture with yellow color output.

The primary differences between the parts are package pin count (15-DIP vs. 16-DIP), brightness rating (2.2mcd vs. 0.65mcd), and power dissipation (60mW vs. 40mW). Circuit design must account for the reduced brightness of the LTC-4624JS and verify PCB footprint compatibility with the 16-DIP package.

Frequently Asked Questions (FAQ)

Q: Can the LTC-4624JS directly replace the LTC-4624Y without circuit modifications?

A: The LTC-4624JS shares identical electrical operating parameters (20mA test current, common anode configuration, 2.05V forward voltage) and physical dimensions with the LTC-4624Y. However, the package differs from 15-DIP to 16-DIP, requiring PCB footprint verification. The reduced brightness (0.65mcd vs. 2.2mcd) may require circuit adjustments to maintain display visibility in the target application.

Q: What is the significance of the wavelength difference between 585nm and 588nm?

A: Both wavelengths fall within the yellow spectrum and are visually indistinguishable to the human eye. The 3nm difference represents normal manufacturing variation within the yellow LED color specification and does not affect functional compatibility.

Q: Why does the LTC-4624JS have lower brightness than the LTC-4624Y?

A: The millicandela rating difference (0.65mcd vs. 2.2mcd) reflects different LED die specifications or optical design between the two parts. This is a characteristic difference between the product variants and must be evaluated against application brightness requirements.

Q: Is the 16-DIP package compatible with a 15-DIP PCB footprint?

A: No. The 15-DIP and 16-DIP packages have different pin counts and pitch configurations. PCB layout and footprint must be verified and potentially redesigned to accommodate the 16-DIP package of the LTC-4624JS.

Q: What does ROHS3 compliance mean for the LTC-4624JS?

A: ROHS3 compliance indicates the LTC-4624JS meets the Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. This certification is required for products sold in regulated markets and ensures environmental compliance.

Q: Are there any other substitute parts available for the LTC-4624Y?

A: Based on the provided data, the LTC-4624JS is the manufacturer-recommended substitute. No additional substitute parts are listed in the available technical documentation.