LTS-5503AE 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LTS-5503AE is a single-character 7-segment LED display module manufactured by Lite-On Inc. This common cathode display is designed for numeric and alphanumeric applications requiring a 0.56-inch character size. The part is currently active in production with full inventory availability. Equivalent and substitute parts may be required due to supply chain considerations, design optimization, or application-specific performance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

LTS-5503AE

Lite-On Inc.In Stock: 736LTS-5503AE Datasheet

Current PartRFQ

SC56-21EWA

KingbrightIn Stock: 1691SC56-21EWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTS-5503AE is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Display Type: 7-Segment (single character)
• Common Pin Configuration: Common Cathode
• Digit/Alpha Size: 0.56" (14.22mm)
• Package / Case: 10-DIP (0.600", 15.24mm)
• Voltage - Forward (Vf) Typical: 2V
• Current - Test: 20mA
• Power Dissipation (Max): 75mW

Allowable Variation Parameters:

• Color: Orange-Red to Red (wavelength range 627nm–630nm)
• Millicandela Rating: Brightness variations within the same product category
• Physical Dimensions: Minor height and width variations within standard tolerance (0.673"–0.750" H; 0.488"–0.500" W)

The SC56-21EWA qualifies as a direct substitute based on matching all critical parameters while exhibiting allowable variations in color specification and brightness rating.

Parameter Comparison

Engineering Selection Recommendations

Both the LTS-5503AE and SC56-21EWA are active production parts with ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance for industrial and commercial applications.

The SC56-21EWA presents a higher brightness output (6.4mcd versus 2.4mcd) while maintaining identical electrical specifications. This brightness differential results from the shift from orange-red (630nm) to red (627nm) wavelength, which is a standard variation within the 7-segment LED display category. Both parts operate at identical forward voltage (2V) and test current (20mA), with matching power dissipation limits (75mW).

Physical dimension variations between the two parts (height difference of 0.077 inches, width difference of 0.012 inches) fall within standard mechanical tolerance ranges for 10-DIP package displays and do not affect electrical interchangeability or PCB footprint compatibility.

Selection between these parts should be based on application-specific brightness requirements and color preference rather than electrical or mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can the SC56-21EWA directly replace the LTS-5503AE in existing designs?

A: Yes. Both parts share identical electrical specifications (2V forward voltage, 20mA test current, 75mW maximum power dissipation), common cathode configuration, 0.56-inch character size, and 10-DIP package format. The primary difference is brightness output and color specification, which do not affect circuit-level compatibility.

Q: What is the significance of the brightness difference (2.4mcd vs. 6.4mcd)?

A: The SC56-21EWA provides approximately 2.7 times higher brightness than the LTS-5503AE. This difference is inherent to the color specification (red versus orange-red) and does not indicate a defect or incompatibility. Applications requiring specific brightness levels should select accordingly.

Q: Are there any PCB layout or footprint considerations when substituting these parts?

A: Both parts use the 10-DIP (0.600", 15.24mm) package format with identical pin spacing. Minor physical dimension variations (0.077 inches in height, 0.012 inches in width) do not affect standard DIP socket compatibility or PCB footprint design. No layout modifications are required.

Q: Do both parts meet the same regulatory and environmental standards?

A: Yes. Both the LTS-5503AE and SC56-21EWA are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring equivalent compliance for regulated applications.

Q: What wavelength difference exists between these parts, and does it affect functionality?

A: The LTS-5503AE operates at 630nm (orange-red), while the SC56-21EWA operates at 627nm (red). This 3nm difference is within the standard color specification range for LED displays and does not affect electrical performance or circuit operation. The difference is visually perceptible as a slight color shift toward pure red.