FND320C 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The FND320C is a single-character 7-segment LED display module manufactured by onsemi, featuring a 0.36" red display with common anode configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The display operates at 1.8V forward voltage with a 20mA test current and delivers 3mcd brightness at a 660nm peak wavelength. Substitute parts maintain the core 7-segment display functionality while offering active product status and enhanced compliance certifications.

Substiute Parts

FND320C

onsemiIn Stock: 1051FND320C Datasheet

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LDS-A324RI

Lumex Opto/Components Inc.In Stock: 865LDS-A324RI Datasheet

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LDS-A325RI

Lumex Opto/Components Inc.In Stock: 888LDS-A325RI Datasheet

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LDS-A3914RI

Lumex Opto/Components Inc.In Stock: 2091LDS-A3914RI Datasheet

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LDS-C3914RI

Lumex Opto/Components Inc.In Stock: 1162LDS-C3914RI Datasheet

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LSHD-F101

Lite-On Inc.In Stock: 973LSHD-F101 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the FND320C is based on the following critical parameters: display type (7-segment), number of characters (1), common pin configuration (common anode), color (red), package type (10-DIP), and physical compatibility. Substitute parts are grouped into two categories based on digit size and package pitch:

Category A - 0.36" Digit Size, 0.200" DIP Pitch (Direct Physical Substitutes):

• LDS-A324RI and LDS-A325RI maintain the original 0.36" digit size and 10-DIP (0.200", 5.08mm) package pitch, ensuring direct PCB compatibility without layout modifications.

Category B - 0.39" Digit Size, 0.300" DIP Pitch (Functional Equivalents with Layout Consideration):

• LDS-A3914RI and LSHD-F101 provide 0.39" digit size with 10-DIP (0.300", 7.62mm) package pitch, requiring PCB layout verification due to increased pin spacing.

Non-Compatible Substitute:

• LDS-C3914RI features common cathode configuration, incompatible with the FND320C common anode design and requiring circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Compatibility (No Layout Changes Required): Select LDS-A324RI or LDS-A325RI. Both parts maintain the 0.36" digit size and 10-DIP (0.200", 5.08mm) package pitch, enabling direct socket replacement. LDS-A324RI offers higher brightness (2.1mcd) and lower test current (10mA) compared to LDS-A325RI (0.5mcd). Both are active products with ROHS3 compliance.

For Enhanced Brightness with Layout Verification: Select LDS-A3914RI or LSHD-F101 for applications requiring higher brightness output. LDS-A3914RI delivers 5.6mcd at 635nm wavelength, while LSHD-F101 provides 9.75mcd at 650nm wavelength. Both require PCB layout verification due to 10-DIP (0.300", 7.62mm) package pitch, which differs from the original 0.200" pitch. Both are active products with ROHS3 compliance.

Avoid: LDS-C3914RI is not suitable as a substitute due to common cathode configuration, which is electrically incompatible with the FND320C common anode design.

Frequently Asked Questions (FAQ)

Q: Can LDS-A324RI or LDS-A325RI be used as direct replacements for FND320C without PCB modifications? A: Yes. Both parts share the same 0.36" digit size and 10-DIP (0.200", 5.08mm) package pitch, allowing direct socket replacement without PCB layout changes.

Q: What is the primary difference between LDS-A324RI and LDS-A325RI? A: Both parts have identical electrical specifications (2V forward voltage, 10mA test current, common anode configuration). The primary difference is brightness: LDS-A324RI provides 2.1mcd at 635nm wavelength, while LDS-A325RI provides 0.5mcd at 700nm wavelength.

Q: Can LDS-A3914RI or LSHD-F101 be used as direct replacements? A: Both parts are functionally equivalent but require PCB layout verification. The 10-DIP (0.300", 7.62mm) package pitch differs from the original 0.200" pitch, necessitating confirmation that PCB footprints accommodate the increased pin spacing.

Q: Why is LDS-C3914RI not recommended as a substitute? A: LDS-C3914RI features common cathode configuration, while FND320C is common anode. These configurations are electrically incompatible and require different circuit designs. Substitution would necessitate complete circuit redesign.

Q: What are the voltage and current differences between FND320C and its substitutes? A: FND320C operates at 1.8V forward voltage with 20mA test current. LDS-A324RI and LDS-A325RI operate at 2V with 10mA test current. LDS-A3914RI operates at 2V with 10mA test current. LSHD-F101 operates at 2.1V with 20mA test current. Circuit current-limiting resistor values may require adjustment based on the selected substitute.

Q: Are all substitute parts RoHS compliant? A: Yes. LDS-A324RI, LDS-A325RI, LDS-A3914RI, and LSHD-F101 are all ROHS3 compliant. The original FND320C does not specify RoHS status.

Q: Which substitute offers the highest brightness? A: LSHD-F101 provides the highest brightness at 9.75mcd, followed by LDS-A3914RI at 5.6mcd. Both require PCB layout verification due to package pitch differences.