LTS4840AY Equivalent & Substitute Parts

Part Overview

The LTS4840AY is a 7-segment LED display module manufactured by Lite-On Inc., featuring a single 0.4" yellow character in common cathode configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and new design implementations. The display operates at 2.1V forward voltage with a 20mA test current and is housed in a 14-DIP package measuring 0.738" H x 0.386" W x 0.200" D (18.75mm x 9.80mm x 5.08mm).

Substiute Parts

LTS4840AY

Lite-On Inc.In Stock: 1026LTS4840AY Datasheet

Current PartRFQ

SC04-11YWA

KingbrightIn Stock: 720SC04-11YWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTS4840AY are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or remain within acceptable operating ranges:

• Display Type: 7-Segment (single character)
• Digit/Alpha Size: 0.40" (10.16mm)
• Color: Yellow
• Common Pin Configuration: Common Cathode
• Voltage - Forward (Vf) (Typ): 2.1V
• Current - Test: 20mA
• Package / Case: 14-DIP
• Physical Dimensions: 0.738" H x 0.386" W x 0.200" D (18.75mm x 9.80mm x 5.08mm)

The SC04-11YWA from Kingbright meets all mandatory electrical and mechanical parameters, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The SC04-11YWA is a direct functional equivalent to the LTS4840AY. Both components share identical electrical specifications (2.1V forward voltage, 20mA test current), mechanical dimensions, and package configuration (14-DIP). The SC04-11YWA is currently in active production status, whereas the LTS4840AY is obsolete.

The SC04-11YWA carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. The substitute part exhibits higher luminous intensity (6.3mcd versus 2.2mcd) and slightly elevated peak wavelength (590nm versus 585nm), both within acceptable tolerances for yellow 7-segment display applications. Maximum power dissipation is 75mW compared to 60mW for the original part, representing a minor increase within typical design margins.

Frequently Asked Questions (FAQ)

Q: Can the SC04-11YWA be used as a direct replacement for the LTS4840AY?

A: Yes. Both components share identical electrical parameters (2.1V forward voltage, 20mA test current), common cathode configuration, 0.40" digit size, and 14-DIP package. Physical dimensions are identical at 0.738" H x 0.386" W x 0.200" D (18.75mm x 9.80mm x 5.08mm). No circuit modifications are required.

Q: What are the differences between these two parts?

A: The SC04-11YWA has higher luminous intensity (6.3mcd versus 2.2mcd), a slightly different peak wavelength (590nm versus 585nm), and marginally higher maximum power dissipation (75mW versus 60mW). These differences do not affect functional compatibility in standard applications.

Q: Why is the LTS4840AY obsolete?

A: The LTS4840AY is classified as obsolete by the manufacturer. The SC04-11YWA from Kingbright is an active production equivalent that fulfills the same functional role.

Q: Are there any compliance or certification differences?

A: The SC04-11YWA carries RoHS3 compliance and REACH unaffected status. Both components have MSL rating of 1 (Unlimited) and ECCN classification of EAR99.

Q: Will the SC04-11YWA fit in the same PCB footprint?

A: Yes. Both components use the 14-DIP package with identical physical dimensions and pin spacing. PCB layouts designed for the LTS4840AY require no modification for the SC04-11YWA.