LTC-571E Equivalent & Substitute Parts Reference

Part Overview

The LTC-571E is a 3-character 7-segment LED display module manufactured by Lite-On Inc., featuring a 0.56" digit size in orange color with common anode configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The display operates at 2V forward voltage with 20mA test current and is housed in a 12-DIP package measuring 0.600" (15.24mm) pitch.

Substiute Parts

LTC-571E

Lite-On Inc.In Stock: 1109LTC-571E Datasheet

Current PartRFQ

BC56-12EWA

KingbrightIn Stock: 1352BC56-12EWA Datasheet

MFR RecommendedRFQ

ELT-511USOWA/S530-A4

Everlight Electronics Co LtdIn Stock: 1023ELT-511USOWA/S530-A4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTC-571E are selected based on the following critical parameters that determine functional compatibility:

• Display Type & Character Count: All substitutes maintain 3-character 7-segment configuration
• Digit Size: All substitutes use 0.56" (14.22mm) digit size for form-factor compatibility
• Package / Case: All substitutes use 12-DIP (0.600", 15.24mm) pitch for PCB footprint compatibility
• Electrical Parameters: Forward voltage (2V) and test current (20mA) are maintained across all substitutes
• Physical Dimensions: Substitutes maintain comparable overall dimensions within tolerance ranges

Note on Configuration Differences: The substitute parts listed feature common cathode configuration, which differs from the LTC-571E common anode design. This requires circuit-level modifications to the driver logic and is not a direct pin-compatible replacement without redesign.

Parameter Comparison

Engineering Selection Recommendations

BC56-12EWA (Kingbright): This substitute is actively manufactured and RoHS3 compliant with REACH unaffected status. It provides higher brightness (5.8mcd vs 2.4mcd) and maintains identical electrical specifications. The common cathode configuration requires driver circuit modification. Packaging is standard tube format with established supply chain availability.

ELT-511USOWA/S530-A4 (Everlight Electronics Co Ltd): This substitute offers the highest brightness rating (17.6mcd) and lowest power dissipation (60mW vs 75mW). It is actively manufactured with RoHS3 compliance. The common cathode configuration requires driver circuit modification. The 11-lead variant requires verification of lead configuration compatibility with existing PCB layouts.

Both substitutes are active products with established compliance certifications, addressing the obsolescence of the LTC-571E. Selection between them depends on brightness requirements and circuit redesign capacity for common cathode operation.

Frequently Asked Questions (FAQ)

Q: Can BC56-12EWA or ELT-511USOWA/S530-A4 be used as direct pin-compatible replacements for LTC-571E?

A: No. While all three parts share the same 12-DIP package and digit size, the LTC-571E uses common anode configuration while both substitutes use common cathode configuration. This requires modification to the driver circuit logic and cannot be treated as a direct socket replacement.

Q: What are the key differences between the two substitute options?

A: BC56-12EWA provides 5.8mcd brightness with 75mW maximum power dissipation. ELT-511USOWA/S530-A4 provides higher brightness at 17.6mcd with lower power dissipation at 60mW. Both maintain 2V forward voltage and 20mA test current. Color differs slightly: BC56-12EWA is red (627nm peak wavelength) while ELT-511USOWA/S530-A4 is orange-red (621nm peak wavelength).

Q: Are both substitutes RoHS compliant?

A: Yes. BC56-12EWA is RoHS3 compliant. ELT-511USOWA/S530-A4 is RoHS3 compliant with REACH unaffected status.

Q: What is the significance of the 11-lead variant notation for ELT-511USOWA/S530-A4?

A: The ELT-511USOWA/S530-A4 is specified as 12-DIP with 11 leads. This indicates one pin position is not used. Verification of lead configuration against existing PCB layouts is required before implementation.

Q: How do the brightness ratings compare?

A: LTC-571E provides 2.4mcd, BC56-12EWA provides 5.8mcd (2.4x brighter), and ELT-511USOWA/S530-A4 provides 17.6mcd (7.3x brighter). Higher brightness may require current limiting adjustments in the driver circuit.