CS82C55A Equivalent & Substitute Parts Reference

Part Overview

The CS82C55A is a 24-channel parallel I/O expander manufactured by Renesas Electronics Corporation, housed in a 44-PLCC surface mount package. This component functions as an interface IC for expanding parallel input/output capabilities in embedded systems and industrial applications. The CS82C55A is classified as obsolete, which necessitates identification of functionally equivalent alternatives from the active product lineup. Substitute parts maintain identical electrical specifications while offering different packaging options or improved product status for new designs and production continuity.

Substiute Parts

CS82C55A

Renesas Electronics CorporationIn Stock: 19730CS82C55A Datasheet

Current PartRFQ

CS82C55AZ

Renesas Electronics CorporationIn Stock: 5462CS82C55AZ Datasheet

DirectRFQ

CP82C55AZ

Renesas Electronics CorporationIn Stock: 7059CP82C55AZ Datasheet

SimilarRFQ

CQ82C55AZ

Renesas Electronics CorporationIn Stock: 2114CQ82C55AZ Datasheet

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ID82C55A

Renesas Electronics CorporationIn Stock: 1972ID82C55A Datasheet

SimilarRFQ

IP82C55AZ

Renesas Electronics CorporationIn Stock: 2265IP82C55AZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS82C55A is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Number of I/O: 24 channels (mandatory)
• Interface Type: Parallel (mandatory)
• Output Type: Open Drain (mandatory)
• Current - Output Source/Sink: 2.5mA (mandatory)
• Voltage - Supply: 4.5V ~ 5.5V (mandatory)
• Base Product Number: 82C55A series (mandatory)

Allowable Variations:

• Operating Temperature range may extend beyond the original specification
• Packaging format may differ (44-PLCC, 40-DIP, 44-MQFP, 40-CDIP)
• Mounting type may vary (Surface Mount or Through Hole)
• Product status may transition from Obsolete to Active
• RoHS compliance status may improve
• Moisture Sensitivity Level may differ based on package type

All substitute parts listed maintain identical electrical functionality and are manufactured by Renesas Electronics Corporation within the 82C55A product family.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Same Package): CS82C55AZ is the primary substitute for CS82C55A. Both components use the 44-PLCC surface mount package with identical electrical specifications. CS82C55AZ holds Active product status and achieves ROHS3 compliance, making it the preferred choice for new designs and production continuity.

Package Alternatives (Different Form Factor):

For applications requiring through-hole mounting, CP82C55AZ (40-DIP) and IP82C55AZ (40-DIP) provide equivalent electrical functionality. IP82C55AZ extends the operating temperature range to -40°C ~ 85°C, suitable for industrial and extended-temperature applications.

For surface mount applications with smaller footprint requirements, CQ82C55AZ (44-MQFP, 10x10mm) offers reduced board space while maintaining the same electrical performance.

For ceramic package applications with extended temperature range, ID82C55A (40-CDIP) provides -40°C ~ 85°C operation in a through-hole format.

All substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for production environments.

Frequently Asked Questions (FAQ)

Q: Can CS82C55AZ directly replace CS82C55A in existing designs? A: Yes. CS82C55AZ is electrically and mechanically identical to CS82C55A, using the same 44-PLCC package and electrical specifications. The primary difference is product status (Active vs. Obsolete) and improved RoHS compliance.

Q: What is the difference between surface mount and through-hole package options? A: Surface mount packages (44-PLCC, 44-MQFP) mount directly to PCB surfaces and require reflow soldering. Through-hole packages (40-DIP, 40-CDIP) insert into PCB holes and use wave soldering. Selection depends on PCB design and manufacturing process.

Q: Why does IP82C55AZ have a wider operating temperature range? A: IP82C55AZ is specified for -40°C ~ 85°C operation, compared to 0°C ~ 70°C for CS82C55A. This extended range is a characteristic of the IP82C55 product line and does not affect electrical functionality within the original temperature specification.

Q: Are all substitute parts RoHS compliant? A: CS82C55A is RoHS non-compliant. All listed substitute parts (CS82C55AZ, CP82C55AZ, CQ82C55AZ, ID82C55A, IP82C55AZ) are ROHS3 compliant, meeting current regulatory requirements.

Q: What is the difference between 44-PLCC, 44-MQFP, and 40-DIP packages? A: 44-PLCC (44-pin Plastic Leaded Chip Carrier) and 44-MQFP (44-pin Metric Quad Flat Pack) are surface mount packages with different footprints. 40-DIP (40-pin Dual In-line Package) is a through-hole package. All maintain identical electrical specifications and 24 I/O channels.

Q: Can I use CQ82C55AZ as a drop-in replacement for CS82C55A? A: CQ82C55AZ is electrically equivalent but uses a different package (44-MQFP vs. 44-PLCC). PCB layout and footprint modifications are required. This substitution is suitable for new designs where board layout can be adapted.

Q: What is Moisture Sensitivity Level (MSL) and why does it vary? A: MSL indicates how long a component can be stored in ambient conditions before soldering. 44-PLCC and 44-MQFP packages have MSL 3 (168 hours). Through-hole packages (40-DIP, 40-CDIP) have MSL 1 (unlimited). This does not affect electrical performance but impacts storage and handling procedures.