LTC-571Y Equivalent & Substitute Parts

Part Overview

The LTC-571Y is a 0.56" yellow 7-segment LED display module manufactured by Lite-On Inc., configured as a 3-character common cathode unit in 12-DIP packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The display operates at 2.1V forward voltage with 20mA test current and delivers 2.4mcd brightness at 585nm wavelength peak.

Substiute Parts

LTC-571Y

Lite-On Inc.In Stock: 1115LTC-571Y Datasheet

Current PartRFQ

BC56-12YWA

KingbrightIn Stock: 1052BC56-12YWA Datasheet

MFR RecommendedRFQ

LDT-N513RI

Lumex Opto/Components Inc.In Stock: 898LDT-N513RI Datasheet

MFR RecommendedRFQ

XDMYK14C3

SunLEDIn Stock: 1039XDMYK14C3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTC-571Y is determined by the following mandatory parameters:

• Display Type & Configuration: 7-Segment, 3-character, common cathode architecture
• Physical Package: 12-DIP (0.600", 15.24mm) form factor
• Color: Yellow LED emission
• Digit Size: 0.56" (14.22mm) character height
• Electrical Compatibility: Forward voltage within acceptable operating range (1.95V–2.1V), common cathode pin configuration

All three substitute parts meet these core substitution criteria. Variations in current draw, brightness output, and wavelength peak represent performance differences within the yellow LED spectrum and do not preclude functional substitution in common cathode 7-segment display applications.

Parameter Comparison

Engineering Selection Recommendations

BC56-12YWA (Kingbright): Active product status with ROHS3 compliance and REACH unaffected certification. Electrical parameters match the LTC-571Y exactly (2.1V, 20mA). Brightness output is elevated at 6.5mcd. Suitable for direct substitution in designs where increased luminous intensity is acceptable or beneficial.

LDT-N513RI (Lumex Opto/Components Inc.): Active product with ROHS3 compliance and REACH unaffected certification. Operates at reduced current (10mA vs. 20mA) and lower brightness (1.4mcd). Forward voltage remains at 2.1V. Packaging note indicates 11 leads instead of standard 12-DIP configuration; verify pinout compatibility before selection. Appropriate for low-power applications where reduced current draw is required.

XDMYK14C3 (SunLED): Active product with ROHS3 compliance and REACH unaffected certification. Lowest forward voltage at 1.95V with 10mA test current. Highest brightness output at 39mcd. Wavelength peak at 590nm (vs. 585nm for LTC-571Y). Suitable for applications requiring maximum luminous intensity or lower operating voltage. Packaged in tube format.

All three substitutes maintain common cathode configuration, 12-DIP package footprint, and MSL 1 rating, ensuring mechanical and electrical compatibility with the LTC-571Y in standard PCB applications.

Frequently Asked Questions (FAQ)

Q: Can BC56-12YWA replace LTC-571Y directly without circuit modification?

A: Yes. Both parts operate at identical forward voltage (2.1V) and test current (20mA) with common cathode configuration and 12-DIP packaging. The increased brightness of BC56-12YWA (6.5mcd vs. 2.4mcd) does not require circuit changes but will produce a brighter display.

Q: What is the significance of the 11 Leads notation on LDT-N513RI?

A: The LDT-N513RI is specified as 12-DIP with 11 leads, indicating one pin position is not used. Verify the pinout diagram against the LTC-571Y to confirm functional compatibility before board layout finalization.

Q: Is XDMYK14C3 suitable for designs with strict power budget constraints?

A: XDMYK14C3 operates at 10mA test current (vs. 20mA for LTC-571Y) and 1.95V forward voltage, making it suitable for lower-power applications. However, the significantly higher brightness (39mcd) may require current-limiting resistor adjustment to match the original display intensity if that is a design requirement.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. BC56-12YWA, LDT-N513RI, and XDMYK14C3 are all ROHS3 compliant and REACH unaffected. The LTC-571Y compliance status is not specified in available documentation.

Q: What is the wavelength difference between 585nm and 590nm?

A: Both wavelengths fall within the yellow LED spectrum. The 585nm peak (LTC-571Y, LDT-N513RI) and 590nm peak (BC56-12YWA, XDMYK14C3) represent minor variations in yellow hue perception. Visual difference is negligible in most applications.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: All three substitutes are mechanically and electrically compatible with the LTC-571Y and with each other in common cathode 7-segment display circuits. Selection should be based on specific brightness, current, and voltage requirements of the target application.