LTS-4640AE 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LTS-4640AE is a single-character 7-segment LED display module manufactured by Lite-On Inc., designed for numeric and alphanumeric display applications. This component features a 0.40-inch orange-red display with common cathode configuration, operating at 2V forward voltage with 20mA test current. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LTS-4640AE

Lite-On Inc.In Stock: 1020LTS-4640AE Datasheet

Current PartRFQ

SC04-11EWA

KingbrightIn Stock: 2304SC04-11EWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTS-4640AE is determined by strict alignment of the following critical parameters:

• Display Type: 7-Segment configuration
• Character Count: Single character only
• Digit Size: 0.40" (10.16mm)
• Common Pin Type: Common Cathode
• Voltage Rating: 2V forward voltage
• Current Specification: 20mA test current
• Package Type: 14-DIP form factor
• Physical Envelope: 0.738" H x 0.386" W x 0.200" D maximum

The SC04-11EWA from Kingbright meets all substitution criteria. While the color specification differs (red versus orange-red) and wavelength varies slightly (627nm versus 630nm), these parameters remain within the functional tolerance for 7-segment display applications and do not prevent direct substitution in circuit implementations.

Parameter Comparison

Engineering Selection Recommendations

The SC04-11EWA serves as a direct functional substitute for the obsolete LTS-4640AE. The Kingbright component maintains active product status and carries RoHS3 compliance certification, providing long-term availability and regulatory alignment for new designs and legacy system replacements.

The SC04-11EWA is packaged in tube format with confirmed inventory availability of 2262 units. Both components share identical electrical specifications (2V forward voltage, 20mA test current, 75mW maximum power dissipation) and mechanical form factors (14-DIP package, 0.40-inch display size, common cathode configuration).

The primary technical difference is the color specification: the SC04-11EWA produces red light at 627nm peak wavelength with 5.6mcd brightness, compared to the LTS-4640AE orange-red at 630nm with 2.2mcd. This brightness increase and slight wavelength shift must be evaluated against specific application requirements for visual perception and optical filtering.

Frequently Asked Questions (FAQ)

Q: Can the SC04-11EWA replace the LTS-4640AE in existing circuit designs?

A: Yes. Both components share identical electrical ratings (2V forward voltage, 20mA test current), common cathode configuration, and 14-DIP package form factor. Direct pin-for-pin substitution is supported without circuit modification.

Q: What is the significance of the color difference between orange-red and red?

A: The LTS-4640AE produces orange-red light at 630nm wavelength, while the SC04-11EWA produces red light at 627nm wavelength. This 3nm difference represents a minor shift in the visible spectrum. The choice between these colors depends on application-specific requirements for visual appearance and any optical filtering in the system design.

Q: Why is the millicandela rating different between the two parts?

A: The SC04-11EWA (5.6mcd) provides higher brightness than the LTS-4640AE (2.2mcd). This increased luminous intensity may affect visibility in high-ambient-light environments or applications with specific brightness requirements. System design must account for this difference in optical output.

Q: Are there package dimension differences between these components?

A: Both components maintain the same physical envelope (0.738" H x 0.386" W x 0.200" D). The 14-DIP package pitch differs slightly (0.300" versus 0.295"), but this variation remains within standard PCB design tolerances for DIP socket compatibility.

Q: What compliance certifications apply to the SC04-11EWA?

A: The SC04-11EWA carries RoHS3 compliance certification and is REACH unaffected. Both components share MSL Level 1 (Unlimited) moisture sensitivity rating and EAR99 export classification.

Q: Why is the LTS-4640AE classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SC04-11EWA from Kingbright provides active product availability with confirmed inventory stock, ensuring supply continuity for replacement and new design applications.