LTP-537Y 16-Segment Alphanumeric LED Display - Equivalent & Substitute Parts

Part Overview

The LTP-537Y is a single-character 16-segment alphanumeric LED display module manufactured by Lite-On Inc. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The display operates as a common cathode configuration with yellow LED output, suitable for applications requiring alphanumeric character representation in a compact 0.5-inch format.

Key Parameters

Parameter	Value
Display Type	16-Segment, Alphanumeric
Number of Characters	1
Character Size	0.50" (12.70mm)
Physical Dimensions	0.984" H x 0.630" W x 0.374" D (25.00mm x 16.00mm x 9.50mm)
Common Pin Configuration	Common Cathode
Color	Yellow
Forward Voltage (Vf)	2.1V
Test Current	20mA
Package Type	18-DIP (0.500", 12.70mm)
Power Dissipation (Max)	60mW
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LTP-537Y must satisfy the following mandatory electrical and mechanical parameters:

Display type: 16-segment alphanumeric configuration
Single character output
Common cathode pin configuration
Yellow LED color
Forward voltage: 2.1V nominal
Test current: 20mA
Package: 18-DIP (0.500", 12.70mm) pin spacing
Physical dimensions: 0.984" H x 0.630" W x 0.374" D

The Kingbright PSC05-11YWA and PSC05-12YWA meet all substitution criteria. Both parts maintain identical electrical specifications (2.1V forward voltage, 20mA test current), mechanical compatibility (18-DIP package, matching physical dimensions), and functional equivalence (16-segment alphanumeric, common cathode, yellow color). These parts are classified as active products, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Parameter	LTP-537Y (Lite-On)	PSC05-11YWA (Kingbright)	PSC05-12YWA (Kingbright)
Display Type	16-Segment, Alphanumeric	16-Segment, Alphanumeric	16-Segment, Alphanumeric
Number of Characters	1	1	1
Character Size	0.50"	0.50"	0.50"
Physical Dimensions	25.00mm x 16.00mm x 9.50mm	25.00mm x 16.00mm x 9.50mm	25.00mm x 16.00mm x 9.50mm
Common Pin Configuration	Common Cathode	Common Cathode	Common Cathode
Color	Yellow	Yellow	Yellow
Forward Voltage (Vf)	2.1V	2.1V	2.1V
Test Current	20mA	20mA	20mA
Package Type	18-DIP (0.500")	18-DIP (0.500")	18-DIP (0.500")
Power Dissipation (Max)	60mW	75mW	75mW
Millicandela Rating	2.2mcd	4.8mcd	4.8mcd
Wavelength - Peak	585nm	590nm	590nm
Product Status	Obsolete	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both Kingbright substitute parts (PSC05-11YWA and PSC05-12YWA) are classified as active products with ROHS3 compliance and REACH unaffected status, providing regulatory assurance for new designs. The LTP-537Y obsolete status necessitates transition to one of these active alternatives.

The PSC05-11YWA offers 1058 pieces in current inventory, while the PSC05-12YWA provides 814 pieces. Both parts maintain full electrical and mechanical compatibility with the original LTP-537Y, requiring no circuit redesign or PCB layout modifications. The substitute parts exhibit higher luminous intensity (4.8mcd versus 2.2mcd) and slightly elevated power dissipation (75mW versus 60mW), both within acceptable design margins for standard applications.

Frequently Asked Questions (FAQ)

Q: Can PSC05-11YWA and PSC05-12YWA be used interchangeably with LTP-537Y?

A: Yes. Both Kingbright parts maintain identical electrical specifications (2.1V forward voltage, 20mA test current), package configuration (18-DIP), and physical dimensions. Pin-for-pin compatibility is confirmed for common cathode operation.

Q: What are the differences between PSC05-11YWA and PSC05-12YWA?

A: Both parts are electrically and mechanically identical. The designation difference reflects internal Kingbright product line organization. Inventory availability differs: PSC05-11YWA (1058 pcs) versus PSC05-12YWA (814 pcs).

Q: Does the higher luminous intensity of substitute parts affect circuit design?

A: The substitute parts deliver 4.8mcd compared to the original 2.2mcd. This increased brightness does not require circuit modifications. Existing current-limiting resistor values remain valid. Applications requiring specific brightness levels should evaluate the enhanced output against design requirements.

Q: Are there compliance considerations for using substitute parts?

A: Both Kingbright substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original LTP-537Y carries no specified compliance certifications in the provided data.

Q: What is the wavelength difference between the original and substitute parts?

A: The LTP-537Y operates at 585nm peak wavelength, while both Kingbright substitutes operate at 590nm. This 5nm difference represents a minor shift within the yellow spectrum and does not affect functional compatibility or visual perception in standard applications.

Q: Can I use these displays in existing PCB designs without modification?

A: Yes. The 18-DIP package, pin spacing (0.500"), and physical dimensions are identical. Direct component substitution on existing PCBs is supported without layout changes.

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