LC75821E-E Equivalent & Substitute Parts

Part Overview

The LC75821E-E is an LCD driver IC manufactured by onsemi, designed for segment LCD display applications. This device features a 53/104 segment configuration with serial interface capability and operates across a 3V to 6.5V supply voltage range. The part is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing design support and production continuity.

Substiute Parts

LC75821E-E

onsemiIn Stock: 837LC75821E-E Datasheet

Current PartRFQ

LC75832E-E

onsemiIn Stock: 858LC75832E-E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for LCD driver ICs is determined by the following critical parameters:

• Package / Case: Both parts must use 64-BQFP to ensure PCB footprint compatibility
• Interface Type: Serial interface requirement must be maintained
• Mounting Type: Surface mount compatibility is required
• Voltage Supply Range: The substitute must operate within or encompass the original supply voltage specification
• Operating Temperature Range: The substitute must support the required temperature envelope
• Segment Configuration: The substitute must support equivalent or greater segment capacity to maintain display functionality
• Moisture Sensitivity Level: MSL rating must be compatible with assembly and storage requirements

The LC75832E-E qualifies as a substitute based on matching package type (64-BQFP), mounting method (surface mount), interface protocol (serial), and moisture sensitivity classification (MSL 4). The substitute provides enhanced specifications in voltage range, temperature range, and segment capacity.

Parameter Comparison

Engineering Selection Recommendations

The LC75832E-E is a direct substitute for the obsolete LC75821E-E based on the following engineering criteria:

Package and Mechanical Compatibility: Both devices use the 64-BQFP package, ensuring identical PCB footprint and assembly compatibility without layout modifications.

Electrical Interface Compatibility: Serial interface protocol is maintained across both parts, allowing firmware and control logic to remain unchanged.

Supply Voltage Consideration: The LC75832E-E operates from 2.7V to 6V, which overlaps the original 3V to 6.5V range. Applications operating at 3V or above will function without modification. Applications requiring operation below 3V or above 6V require design review.

Temperature Range Enhancement: The LC75832E-E extends the upper operating temperature to 105°C compared to the original 85°C, providing improved thermal margin for high-temperature environments.

Segment Capacity: The LC75832E-E supports 54/108 segment configurations, exceeding the original 53/104 capacity. This enhancement maintains full compatibility with existing display requirements.

Product Status and Compliance: The LC75832E-E is active production status with RoHS3 compliance, ensuring long-term availability and regulatory alignment. Both parts share identical REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the LC75832E-E directly replace the LC75821E-E without PCB modifications?

A: Yes. Both devices use the 64-BQFP package with identical pinout compatibility for the 64-pin surface mount configuration. No PCB layout changes are required.

Q: Are there voltage supply differences that affect circuit design?

A: The LC75832E-E operates from 2.7V minimum compared to 3V for the LC75821E-E. If your application operates at 3V or higher, no design changes are needed. Applications requiring operation below 3V must verify compatibility with the original design specifications.

Q: Does the substitute support the same segment configurations?

A: The LC75832E-E supports 54/108 segment configurations compared to the original 53/104. This represents an increase in available segments and maintains full compatibility with existing 53/104 segment display requirements.

Q: What is the temperature operating range difference?

A: The LC75832E-E extends the upper temperature limit to 105°C versus 85°C for the original part. Both maintain the same -40°C lower limit. Applications requiring operation above 85°C benefit from the extended range.

Q: Are there supply current differences between the parts?

A: The LC75832E-E specifies a maximum supply current of 250 µA. The original LC75821E-E does not provide this specification in the available data. Power consumption analysis should reference the LC75832E-E datasheet for current design.

Q: What is the moisture sensitivity level for both parts?

A: Both the LC75821E-E and LC75832E-E are classified as MSL 4 (72 Hours), indicating identical moisture handling and storage requirements during assembly and logistics.

Q: Is the LC75832E-E RoHS compliant?

A: Yes, the LC75832E-E is RoHS3 compliant. Both parts are REACH unaffected and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.