LDD-E5406RI Equivalent & Substitute Parts

Part Overview

The LDD-E5406RI is a 14-segment alphanumeric LED display module manufactured by Lumex Opto/Components Inc. This dual-character red display operates as a common anode configuration and is housed in an 18-DIP package. The module is designed for applications requiring alphanumeric character display with a 0.54-inch character size.

The LDD-E5406RI maintains Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of the 14-segment alphanumeric display category, specifically for dual-character common anode configurations in 18-DIP packaging.

Substiute Parts

LDD-E5406RI

Lumex Opto/Components Inc.In Stock: 1109LDD-E5406RI Datasheet

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HDSP-A22C

Broadcom LimitedIn Stock: 1782HDSP-A22C Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LDD-E5406RI are identified based on strict equivalence within the following critical parameters:

Mandatory Matching Criteria:

• Display Type: 14-Segment, Alphanumeric
• Number of Characters: 2
• Common Pin Configuration: Common Anode
• Color: Red
• Package / Case: 18-DIP (0.600", 15.24mm)
• Character Size: 0.54" (13.72mm)

Allowed Parameter Variations: Substitute parts may differ in the following electrical characteristics while maintaining functional compatibility:

• Voltage - Forward (Vf): Variation permitted within typical operating ranges for red LED displays
• Current - Test: Variation permitted based on display brightness requirements
• Wavelength - Peak: Variation permitted within red spectrum (typically 630nm to 660nm)
• Millicandela Rating: Variation permitted based on brightness specifications
• Physical Dimensions: Minor variations permitted within standard DIP package tolerances
• Power Dissipation: Variation permitted based on current and voltage characteristics

The HDSP-A22C from Broadcom Limited qualifies as a substitute part based on matching all mandatory criteria while operating within allowed electrical parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Both the LDD-E5406RI and HDSP-A22C are Active products with ROHS3 compliance and MSL Level 1 rating, indicating equivalent regulatory and environmental compliance status.

The HDSP-A22C operates at higher forward voltage (1.9V versus 1.7V) and higher test current (20mA versus 10mA), resulting in increased brightness output (18mcd to 36mcd versus 6mcd). The wavelength peak differs slightly (635nm versus 660nm), both within the red spectrum range.

Physical dimensions are nearly identical with minor variations within standard DIP package tolerances. Both parts are housed in 18-DIP packages with matching pin configurations and character sizes.

Selection between these parts depends on circuit design requirements for forward voltage, current consumption, and brightness specifications. Both parts maintain identical package footprints and pin assignments for direct substitution in 18-DIP socket applications.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-A22C replace the LDD-E5406RI in existing designs?

A: The HDSP-A22C is mechanically and functionally compatible as a substitute. Both parts share identical 18-DIP package dimensions, pin configurations, and character display specifications. Circuit design must accommodate the higher forward voltage (1.9V) and current requirements (20mA) of the HDSP-A22C.

Q: What are the key differences between these two parts?

A: The primary differences are electrical characteristics. The HDSP-A22C operates at 1.9V forward voltage and 20mA test current compared to 1.7V and 10mA for the LDD-E5406RI. The HDSP-A22C provides higher brightness output (18mcd to 36mcd versus 6mcd). Wavelength peaks differ slightly (635nm versus 660nm), both within acceptable red spectrum ranges.

Q: Are the physical dimensions identical?

A: Physical dimensions are nearly identical. The LDD-E5406RI measures 0.827" H x 0.984" W x 0.307" D, while the HDSP-A22C measures 0.827" H x 0.992" W x 0.276" D. These minor variations fall within standard DIP package tolerances and do not affect PCB mounting or socket compatibility.

Q: Do both parts have the same compliance certifications?

A: Both parts are RoHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Both maintain Active product status. Compliance certifications are equivalent between the two parts.

Q: What is the significance of the wavelength difference?

A: The LDD-E5406RI operates at 660nm peak wavelength while the HDSP-A22C operates at 635nm. Both wavelengths fall within the red spectrum. The 660nm wavelength produces a deeper red appearance, while 635nm produces a brighter red appearance. Selection depends on visual appearance requirements for the application.

Q: Can I use the HDSP-A22C in a circuit designed for the LDD-E5406RI without modifications?

A: Direct substitution requires circuit design review. The higher forward voltage and current requirements of the HDSP-A22C necessitate verification of current-limiting resistor values and power supply capacity. Pin assignments are identical, allowing direct socket replacement after electrical parameter verification.