LTP-3786E-03 Equivalent & Substitute Parts

Part Overview

The LTP-3786E-03 is a 14-segment alphanumeric LED display module manufactured by Lite-On Inc., designed for applications requiring dual-character numeric and alphabetic display capability. This component features a 0.54" character size with orange-red emission, common anode configuration, and 18-DIP packaging. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and legacy system support.

Substiute Parts

LTP-3786E-03

Lite-On Inc.In Stock: 992LTP-3786E-03 Datasheet

Current PartRFQ

LTP-3786E

Lite-On Inc.In Stock: 2517LTP-3786E Datasheet

MFR RecommendedRFQ

HDSP-A22C

Broadcom LimitedIn Stock: 1782HDSP-A22C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTP-3786E-03 is determined by the following critical parameters:

• Display Type & Character Count: Must be 14-segment alphanumeric with 2-character configuration
• Character Size: Must be 0.54" (13.72mm) to maintain mechanical and optical compatibility
• Common Pin Configuration: Must be common anode to ensure circuit compatibility without redesign
• Package Type: Must be 18-DIP (0.600", 15.24mm) for PCB footprint compatibility
• Electrical Characteristics: Forward voltage and test current must be within acceptable operating ranges for existing driver circuits
• Wavelength: Color emission must be compatible with optical system design

Two substitute parts meet these criteria with varying degrees of parameter alignment:

1. LTP-3786E (Lite-On Inc.) — Direct manufacturer equivalent with identical electrical and optical specifications
2. HDSP-A22C (Broadcom Limited) — Cross-manufacturer substitute with compatible core parameters but differing color emission and brightness characteristics

Parameter Comparison

Engineering Selection Recommendations

LTP-3786E is the primary substitute for LTP-3786E-03. Both parts are manufactured by Lite-On Inc. and share identical electrical specifications, optical characteristics, and packaging. The LTP-3786E maintains active product status and is ROHS3 compliant, providing supply chain continuity with no circuit redesign required. This part is the direct functional equivalent.

HDSP-A22C is a secondary cross-manufacturer substitute suitable when LTP-3786E availability is constrained. The Broadcom part maintains mechanical compatibility (18-DIP package, 0.54" character size, common anode configuration) and electrical compatibility (20mA test current, similar forward voltage at 1.9V). However, the following differences require evaluation:

• Color emission shifts from orange-red (630nm) to red (635nm), which may affect visual appearance in the application
• Brightness increases significantly (18mcd ~ 36mcd versus 2.3mcd), requiring potential adjustment of current-limiting resistor values to maintain consistent display intensity
• REACH status differs (REACH Unaffected versus REACH Affected for LTP-3786E)

Selection between LTP-3786E and HDSP-A22C depends on application requirements for color consistency, brightness tolerance, and regulatory compliance scope.

Frequently Asked Questions (FAQ)

Q: Can LTP-3786E directly replace LTP-3786E-03 without circuit modification?

A: Yes. The LTP-3786E is electrically and mechanically identical to LTP-3786E-03. No circuit redesign is required. Both parts operate at 2V forward voltage, 20mA test current, and use identical 18-DIP packaging with common anode configuration.

Q: What are the key differences between LTP-3786E and HDSP-A22C?

A: Both parts share the same 14-segment alphanumeric display type, 2-character configuration, 0.54" character size, common anode configuration, and 18-DIP package. Differences include: color (orange-red versus red), forward voltage (2V versus 1.9V), brightness (2.3mcd versus 18mcd ~ 36mcd), and manufacturer (Lite-On versus Broadcom).

Q: Will HDSP-A22C work in a circuit designed for LTP-3786E-03?

A: HDSP-A22C is mechanically and functionally compatible with identical pinout and package. The 0.1V lower forward voltage (1.9V versus 2V) is within typical circuit tolerance. However, the significantly higher brightness (18mcd ~ 36mcd versus 2.3mcd) may require adjustment of current-limiting resistors to prevent over-brightness or excessive power dissipation.

Q: Are all three parts available in the same packaging?

A: LTP-3786E-03 and HDSP-A22C both use 18-DIP (0.600", 15.24mm) packaging. LTP-3786E uses 18-DIP packaging without dimensional specification in the provided data. All three parts are mechanically compatible for PCB footprint purposes.

Q: What is the significance of the product status difference?

A: LTP-3786E-03 is classified as obsolete, indicating discontinued manufacturing and limited availability. LTP-3786E and HDSP-A22C are both active products with ongoing production and supply availability, making them suitable for new designs and legacy system support.

Q: Do all substitute parts meet RoHS compliance?

A: LTP-3786E and HDSP-A22C are both ROHS3 compliant. RoHS status for LTP-3786E-03 is not specified in the provided data.