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HomeProductsIntegrated Circuits (ICs)Interface - I/O ExpandersCS82C55A-5
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CS82C55A-5 - Renesas Electronics America Inc

Manufacturer Part Number
CS82C55A-5
Manufacturer
Renesas Electronics Corporation
Allelco Part Number
32D-CS82C55A-5
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
13,830 pcs available, New & Original
Parts Description
IC XPNDR PARALLEL 44PLCC
Package
44-PLCC (16.58x16.58)
Data sheet
CS82C55A-5.pdf

PCN Obsolescence/ EOL

Multiple Devices 10/Jun/2015.pdf
RoHs Status
 
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In stock: 13830

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Specifications

CS82C55A-5 Tech Specifications
Renesas Electronics America Inc - CS82C55A-5 technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics America Inc - CS82C55A-5

Product Attribute Attribute Value
Manufacturer Renesas Electronics Corporation
Voltage - Supply 4.5V ~ 5.5V
Supplier Device Package 44-PLCC (16.58x16.58)
Series -
Package / Case 44-LCC (J-Lead)
Package Tube
Output Type Open Drain
Operating Temperature 0°C ~ 70°C
Product Attribute Attribute Value
Number of I/O 24
Mounting Type Surface Mount
Interrupt Output No
Interface Parallel
Features -
Current - Output Source/Sink 2.5mA
Base Product Number 82C55A

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

CS82C55A-5 Image
CS82C55A-5 (1)

Manufacturer Part Number

CS82C55A-5

Manufacturer

Renesas Electronics America

Introduction

The CS82C55A-5 is a 24-bit parallel input/output (I/O) expander from Renesas Electronics America. It provides a versatile interface solution for various applications, offering a wide range of features and performance capabilities.

Product Features and Performance

24-bit parallel I/O interface

Supports a voltage supply range of 4.5V to 5.5V

Operates within a temperature range of 0°C to 70°C

Surface mount packaging in a 44-LCC (J-Lead) format

Supplier device package is 44-PLCC (16.58x16.58)

Based on the Renesas 82C55A base product number

Product Advantages

Flexible and versatile I/O expansion capabilities

Wide operating voltage and temperature range for diverse applications

Surface mount packaging for efficient board integration

Compatibility with Renesas 82C55A-based systems

Key Reasons to Choose this Product

Reliable and proven Renesas Electronics technology

Scalable I/O expansion options for your project needs

Robust performance and compatibility for a wide range of applications

Cost-effective solution for expanding your system's I/O capabilities

Quality and Safety Features

Designed and manufactured to Renesas Electronics' high-quality standards

Compliance with industry safety and regulatory requirements

Compatibility

The CS82C55A-5 is compatible with systems and applications based on the Renesas 82C55A I/O expander.

Application Areas

Industrial automation and control systems

Embedded systems and microcontroller-based applications

General-purpose I/O expansion requirements

Product Lifecycle

The CS82C55A-5 is currently an obsolete product. Customers are advised to contact our website's sales team for information on equivalent or alternative models that may be available.

Frequently Asked Questions(FAQ)

What are the key electrical characteristics of the CS82C55A-5 I/O expander that influence its suitability for industrial control applications?
The CS82C55A-5 operates within a supply voltage range of 4.5V to 5.5V, which aligns with standard TTL and CMOS logic levels commonly used in industrial systems. Its output current capability is limited to 2.5mA source/sink per pin, which necessitates external buffering when driving higher-current loads such as relays or LEDs without additional discrete components. This current limitation, combined with open-drain output configuration, implies that pull-up resistors must be carefully selected based on target load and switching frequency. These constraints require engineers to evaluate power delivery and signal integrity early in system-level planning.
How does the CS82C55A-5 compare to alternative variants like the CP82C55A-5Z or ID82C55A in terms of availability and functional equivalence?
While the CS82C55A-5 shares the same base architecture (82C55A) as substitutes such as CP82C55A-5Z and ID82C55A, differences in packaging and supplier designation may affect procurement strategy. The CS82C55A-5 uses a 44-PLCC package (16.58x16.58), identical to some alternatives, but RoHS compliance status varies—CS82C55A-5 is non-compliant, whereas other variants may meet current environmental regulations. Engineers should verify not only pin compatibility but also regulatory requirements before substitution, especially in designs requiring full REACH or RoHS adherence.
What design considerations arise from the CS82C55A-5’s operating temperature range of 0°C to 70°C when integrating it into embedded systems?
The CS82C55A-5’s specified operating temperature range of 0°C to 70°C restricts its use to indoor or climate-controlled environments where ambient conditions remain stable. In outdoor or high-heat industrial settings, thermal management strategies—such as airflow, heatsinking, or enclosure design—must ensure junction temperatures stay within bounds. Failure to do so could lead to timing degradation, increased leakage current, or functional failure. Therefore, thermal modeling during PCB layout and system integration is essential, particularly in compact form-factor designs where heat dissipation is limited.
Can the CS82C55A-5 reliably interface directly with modern microcontrollers such as ARM Cortex-M series devices without level shifting?
Yes, but with caveats. The CS82C55A-5 operates at 5V logic levels and is compatible with 5V-tolerant microcontroller GPIOs only if the MCU supports 5V input thresholds. Many modern ARM-based MCUs operate at 3.3V and may not recognize valid high logic levels above 2.0V to 2.4V. Direct connection could result in undefined states or damage over time. A level-shifting circuit using bidirectional buffers or MOSFET-based translators is recommended to maintain signal integrity and protect the microcontroller.
What role does the interrupt feature absence play in system design decisions involving the CS82C55A-5?
Unlike some enhanced I/O expanders, the CS82C55A-5 lacks dedicated interrupt output functionality. This means external state changes—such as input pin transitions—cannot trigger asynchronous interrupts on the host processor. Instead, software polling becomes necessary, increasing CPU overhead and potentially reducing real-time responsiveness. For time-critical applications, this trade-off may justify selecting a newer device with interrupt support, unless the application’s event rate permits efficient polling intervals.
How does the 24-bit parallel interface of the CS82C55A-5 impact data throughput compared to serial alternatives like SPI-based I/O expanders?
The CS82C55A-5 provides 24 parallel I/O lines accessible simultaneously via a shared data bus, enabling burst transfers of up to 24 bits without bit manipulation. In contrast, SPI-based expanders require sequential bit shifting, resulting in lower effective bandwidth under equivalent clock speeds. For example, transferring all 24 pins at 10 MHz via SPI might take several microseconds, while parallel access completes in nanoseconds. However, parallel interfaces consume more PCB space and routing resources, making the choice dependent on speed requirements versus board complexity.
What precautions should be taken when using the CS82C55A-5’s open-drain outputs to drive inductive loads?
Open-drain outputs on the CS82C55A-5 cannot source current; they can only sink it. When driving inductive loads like solenoids or motors, back EMF generated during turn-off can exceed the IC’s absolute maximum ratings if uncontrolled. A flyback diode must be placed across each load to clamp inductive spikes. Additionally, since the internal pull-up is absent, an external resistor network must provide the necessary pull-up voltage. Proper selection of resistor values ensures adequate rise times while respecting the 2.5mA sink limit per pin.
Why might the CS82C55A-5 be preferred over newer programmable I/O solutions despite its lack of advanced features?
Legacy designs often prioritize component reuse and proven reliability in stable systems. The CS82C55A-5, part of the well-established 82C55 family, offers deterministic behavior and long-term availability through Renesas’ continuity program. In applications where firmware simplicity, minimal interrupt handling, and predictable timing are more valuable than cutting-edge performance, this device remains a cost-effective solution. Its straightforward programming model reduces development risk in mature product lines undergoing incremental updates rather than redesigns.

Parts with Similar Specifications

The three parts on the right have similar specifications to Renesas Electronics America Inc CS82C55A-5

Product Attribute CS82C55A-5Z CS82C55A-596 CS82C55A-5Z96 CS82C55AZ96S2705
Part Number CS82C55A-5Z CS82C55A-596 CS82C55A-5Z96 CS82C55AZ96S2705
Manufacturer Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current - Output Source/Sink - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Mounting Type - Surface Mount Through Hole Surface Mount
Interrupt Output - - - -
Features - - - Simultaneous Sampling
Number of I/O - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Supply - - - -
Interface - - - -
Series - - - -

CS82C55A-5 Datasheet PDF

Download CS82C55A-5 pdf datasheets and Renesas Electronics America Inc documentation for CS82C55A-5 - Renesas Electronics America Inc.

PCN Packaging
Label Change-All Devices 01/Dec/2022.pdf
PCN Obsolescence/ EOL
Multiple Devices 10/Jun/2015.pdf

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
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Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
CS82C55A-5 Image

CS82C55A-5

Renesas Electronics America Inc
32D-CS82C55A-5

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