MAN8640 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The MAN8640 is a 0.8-inch single-character 7-segment LED display manufactured by onsemi, featuring an orange-red color with common cathode configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The display operates at a maximum forward voltage of 2.5V with a test current of 20mA and is housed in an 18-DIP package with 14 leads.

Substiute Parts

MAN8640

onsemiIn Stock: 815MAN8640 Datasheet

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LTS-3403LE

Lite-On Inc.In Stock: 1052LTS-3403LE Datasheet

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SC08-21EWA

KingbrightIn Stock: 3207SC08-21EWA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAN8640 is determined by the following critical parameters:

• Display type must be 7-segment
• Single character configuration required
• Digit size must be 0.80" (20.32mm)
• Common cathode pin configuration mandatory
• Package must be 18-DIP (0.600", 15.24mm)
• Forward voltage and test current must be compatible with circuit design specifications
• Wavelength in the 627-630nm range (red to orange-red spectrum)

The identified substitute parts LTS-3403LE and SC08-21EWA meet these core electrical and mechanical parameters, enabling direct replacement in applications where the MAN8640 is no longer available.

Parameter Comparison

Engineering Selection Recommendations

Both LTS-3403LE and SC08-21EWA are active products suitable for replacing the obsolete MAN8640. Selection between these substitutes depends on specific application requirements:

LTS-3403LE maintains the orange-red color specification of the original MAN8640 with a forward voltage of 2V, providing the closest color match. This part is RoHS3 compliant and carries MSL rating 1.

SC08-21EWA offers a red color variant (627nm wavelength versus 630nm) with identical electrical parameters of 2V forward voltage and 20mA test current. This part is also RoHS3 compliant with MSL rating 1 and demonstrates higher brightness at 8mcd compared to the MAN8640's 2.2mcd rating.

Both substitute parts operate at lower maximum power dissipation (75mW) compared to the original specification (600mW), indicating improved efficiency. The slight variation in lead count (13 or 15 leads versus 14 leads in the original) requires verification against PCB layout and circuit design specifications.

Frequently Asked Questions (FAQ)

Q: Can LTS-3403LE and SC08-21EWA be used interchangeably with MAN8640?

A: Both parts share the same 18-DIP package footprint, 0.80-inch digit size, common cathode configuration, and 20mA test current. However, the lead count differs (13 and 15 leads respectively versus 14 leads), requiring PCB layout verification. LTS-3403LE maintains the orange-red color; SC08-21EWA is red.

Q: What is the impact of the 2V forward voltage in substitutes versus the 2.5V maximum of MAN8640?

A: The substitute parts operate at a lower forward voltage specification, which is compatible with the MAN8640 application if the original circuit was designed for the 2.5V maximum. Circuit validation is necessary to confirm voltage compatibility with existing current-limiting resistor values.

Q: Are the substitute parts RoHS compliant?

A: Yes, both LTS-3403LE and SC08-21EWA are RoHS3 compliant. The original MAN8640 status is not specified in the provided data.

Q: How do the brightness ratings compare?

A: MAN8640 is rated at 2.2mcd, LTS-3403LE at 2.4mcd, and SC08-21EWA at 8mcd. The SC08-21EWA provides significantly higher brightness output.

Q: What is the significance of the different lead counts?

A: The MAN8640 has 14 leads, LTS-3403LE has 13 leads, and SC08-21EWA has 15 leads within the same 18-DIP package. PCB layout and schematic connections must be verified to ensure compatibility with the selected substitute part.