MSQ6440C Equivalent & Substitute Parts

Part Overview

The MSQ6440C is a 4-character 7-segment LED display module manufactured by onsemi, featuring a 0.56" digit size with common cathode configuration and green color output. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The module operates at 2.1V forward voltage with 20mA test current and is housed in a 36-DIP package format.

Substiute Parts

MSQ6440C

onsemiIn Stock: 1022MSQ6440C Datasheet

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CC56-11CGKWA

KingbrightIn Stock: 846CC56-11CGKWA Datasheet

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LDQ-C512RI

Lumex Opto/Components Inc.In Stock: 1198LDQ-C512RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MSQ6440C is determined by the following critical parameters:

• Character Count: Must be 4 characters
• Digit Size: Must be 0.56" (14.22mm)
• Display Type: Must be 7-Segment
• Common Pin Configuration: Must be Common Cathode
• Color: Must be Green
• Package Format: Must be 36-DIP Module (0.600", 15.24mm)
• Electrical Compatibility: Forward voltage and test current must be within acceptable operating ranges for the application circuit

The identified substitute parts meet these core requirements. Variations in forward voltage (2.1V to 2.2V), test current (10mA to 20mA), brightness (millicandela rating), and wavelength represent acceptable parameter ranges within the 7-segment green LED display category and do not preclude functional substitution when circuit design accommodates these tolerances.

Parameter Comparison

Engineering Selection Recommendations

CC56-11CGKWA (Kingbright): This part is actively manufactured and ROHS3 compliant. It matches the MSQ6440C in forward voltage (2.1V) and test current (20mA), providing direct electrical compatibility. The higher millicandela rating (35mcd versus 2.2mcd) indicates increased brightness output. Physical dimensions are within 0.004" tolerance across all axes. This part is suitable for applications requiring direct replacement with enhanced brightness characteristics.

LDQ-C512RI (Lumex Opto/Components Inc.): This part is actively manufactured and ROHS3 compliant. It operates at 2.2V forward voltage with reduced test current (10mA versus 20mA), resulting in lower power dissipation (105mW maximum). The millicandela rating (4.6mcd) is closer to the original specification. Physical dimensions are within 0.004" tolerance. This part is suitable for applications where lower power consumption is beneficial or where the circuit design can accommodate the slightly higher forward voltage.

Both substitute parts maintain the 36-DIP package format, 4-character configuration, 0.56" digit size, common cathode topology, and green color specification of the original MSQ6440C.

Frequently Asked Questions (FAQ)

Q: Can the CC56-11CGKWA replace the MSQ6440C directly in existing circuit designs?

A: Yes. The CC56-11CGKWA maintains identical forward voltage (2.1V) and test current (20mA) specifications, ensuring compatibility with existing driver circuits and current-limiting resistor calculations. The 36-DIP pinout is identical. The increased brightness (35mcd) will be visually apparent but does not affect electrical functionality.

Q: What is the primary difference between the LDQ-C512RI and the original MSQ6440C?

A: The LDQ-C512RI operates at 2.2V forward voltage (0.1V higher) and 10mA test current (half the original specification). Circuit designs must verify that the driver can supply 2.2V and that the reduced current does not compromise display visibility for the application. Power dissipation is higher at 105mW maximum.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 36-DIP Module (0.600", 15.24mm) package format with common cathode configuration. Physical dimensions are within manufacturing tolerance across all axes.

Q: What is the significance of the "7-Segment Clock" designation for the CC56-11CGKWA?

A: The "7-Segment Clock" designation indicates the display format is optimized for clock applications. The functional 7-segment display capability remains identical to standard 7-segment modules. This designation does not restrict use in non-clock applications.

Q: Which substitute part should be selected for new designs?

A: Both CC56-11CGKWA and LDQ-C512RI are active products with ROHS3 compliance. Selection depends on application requirements: choose CC56-11CGKWA for direct electrical compatibility and higher brightness; choose LDQ-C512RI for lower power consumption if the circuit design accommodates 2.2V forward voltage and 10mA test current.

Q: Are there any compliance or regulatory differences between the parts?

A: All three parts share identical REACH Status (REACH Unaffected), ECCN (EAR99), and HTSUS (8541.41.0000) classifications. The CC56-11CGKWA and LDQ-C512RI are ROHS3 compliant, while the MSQ6440C compliance status is not specified. All parts have MSL rating of 1 (Unlimited).