MAN8440 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The MAN8440 is a 0.8-inch single-character green 7-segment LED display manufactured by onsemi, configured as an 18-DIP package with common cathode architecture. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The display operates at 2.2V forward voltage with 20mA test current and delivers 3.2mcd brightness at 562nm peak wavelength.

Substiute Parts

MAN8440

onsemiIn Stock: 999MAN8440 Datasheet

Current PartRFQ

LTS-3403LG

Lite-On Inc.In Stock: 4028LTS-3403LG Datasheet

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SC08-21GWA

KingbrightIn Stock: 799SC08-21GWA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAN8440 are qualified based on the following critical parameters:

• Display Type & Configuration: 7-segment, single character, common cathode architecture
• Physical Compatibility: 0.80-inch digit size, 18-DIP package footprint (0.600" pitch)
• Electrical Compatibility: Forward voltage range 2.1V–2.2V, test current 20mA
• Optical Characteristics: Green color, peak wavelength 562nm–565nm range
• Environmental Compliance: Moisture Sensitivity Level 1, ECCN EAR99 classification

The identified substitutes (LTS-3403LG and SC08-21GWA) meet these core criteria while maintaining functional equivalence for circuit-level integration.

Parameter Comparison

Engineering Selection Recommendations

LTS-3403LG (Lite-On Inc.): This substitute maintains electrical compatibility with 2.1V forward voltage and 20mA test current. The part is active and ROHS3 compliant. Lead count differs (13 vs. 14), requiring PCB layout verification. Brightness is lower at 2.4mcd compared to the original 3.2mcd. REACH status is affected, requiring compliance documentation for regulated markets.

SC08-21GWA (Kingbright): This substitute provides the closest electrical match with identical 2.2V forward voltage and 20mA test current. The part is active and ROHS3 compliant. Lead count differs (15 vs. 14), requiring PCB layout verification. Brightness is significantly higher at 13mcd, providing enhanced visibility. REACH status is unaffected. Power dissipation is lower at 62.5mW.

Selection between substitutes depends on PCB layout constraints (lead count compatibility), brightness requirements, and regulatory compliance needs for the target market.

Frequently Asked Questions (FAQ)

Q: Can LTS-3403LG and SC08-21GWA be used interchangeably with MAN8440?

A: Both parts share the same 7-segment display type, 0.80-inch digit size, common cathode configuration, and 18-DIP package footprint. However, lead count differences (13 and 15 leads respectively, versus 14 on the original) require PCB layout verification before substitution. Electrical parameters (forward voltage, test current) are compatible within acceptable tolerances.

Q: What is the impact of different lead counts on PCB compatibility?

A: Lead count variations affect pin assignments and PCB trace routing. The 18-DIP package footprint remains consistent, but internal lead positioning differs. PCB designs must be reviewed to confirm that unused or repositioned leads do not create electrical conflicts or mechanical interference.

Q: How do brightness differences affect circuit design?

A: The MAN8440 delivers 3.2mcd, LTS-3403LG delivers 2.4mcd, and SC08-21GWA delivers 13mcd. Lower brightness may require reduced series resistor values to maintain perceived brightness; higher brightness may require increased series resistor values to prevent over-current conditions. Current-limiting resistor calculations must be adjusted accordingly.

Q: Are there compliance differences between substitutes?

A: LTS-3403LG is ROHS3 compliant with REACH affected status. SC08-21GWA is ROHS3 compliant with REACH unaffected status. Both carry MSL 1 (unlimited) moisture sensitivity. Regulatory requirements for the target market determine which substitute is appropriate.

Q: What is the wavelength significance of 562nm versus 565nm?

A: Both wavelengths fall within the green spectrum and are visually indistinguishable to the human eye. The 3nm difference reflects manufacturing process variations between manufacturers and does not impact functional compatibility.