R80C188XL20

The R80C188XL20 is a commercial-grade microprocessor featuring an 80C186 core in a single 16-bit core configuration running at 20 MHz. Designed for embedded applications, it offers on-chip support for DRAM controllers and DMA interfaces while supporting an external 80187 floating-point coprocessor.

Packaged in a 68-lead PLCC (J-lead) surface-mount package and specified for 5 V I/O, this device targets embedded system designs that require a compact, socketable surface-mount microprocessor with a defined operating range of 0 °C to 70 °C. The part is RoHS compliant.

Key Features

• Core Architecture 80C186 core with a single 16-bit processing core for embedded control and application processing.
• Clock Speed 20 MHz operating frequency suitable for moderate-performance embedded tasks.
• Memory and Expansion Integrated support for DRAM controllers and external 80187 FPU support for floating-point acceleration when required.
• System Interfaces Includes DMA interfaces to offload data transfers and improve system throughput.
• Power and I/O 5 V I/O voltage compatibility for interfacing with standard TTL/CMOS systems.
• Package and Mounting 68-LCC (J-Lead) / 68-PLCC supplier device package optimized for surface-mount PCB assembly.
• Operating Range and Grade Commercial grade, specified for 0 °C to 70 °C ambient operation.
• Environmental Compliance RoHS compliant construction for regulatory alignment in commercial electronic products.

Typical Applications

• Embedded Control Systems Use the 16-bit 80C186 core and DMA capabilities for general-purpose embedded control tasks and sequence management.
• Industrial and Commercial Equipment Suited for commercial-grade equipment requiring a surface-mount PLCC microprocessor with DRAM controller support.
• Legacy System Maintenance Appropriate for maintenance or refurbishment of systems designed around the i186 family where a 20 MHz part is specified.
• Peripheral and I/O Management DMA interfaces enable efficient handling of peripheral data transfers in system controller roles.

Unique Advantages

• Single 16-bit Core Simplicity: A straightforward 80C186 single-core design simplifies software porting and deterministic control tasks.
• Expandable Floating‑Point Capability: Support for an external 80187 FPU lets designers add floating-point acceleration only when needed.
• Onboard DRAM Controller Support: Built-in DRAM controller support reduces external component count for memory subsystems.
• DMA for Efficient Data Movement: Integrated DMA interfaces reduce CPU overhead for bulk data transfers, improving effective system throughput.
• Surface‑Mount PLCC Packaging: 68-PLCC (J-Lead) package provides a compact, board-friendly footprint for commercial embedded assemblies.
• Regulatory Compatibility: RoHS compliance supports environmental regulations for commercial electronic products.

Why Choose R80C188XL20?

The R80C188XL20 balances a focused 16-bit 80C186 processing core with practical system interfaces—DRAM controller support, DMA, and the option to add an 80187 FPU—making it a pragmatic choice for embedded designs that require predictable performance and straightforward memory/peripheral integration. Its 5 V I/O and 68-PLCC surface-mount package enable easy integration into existing commercial boards and refurbishments.

This part is well suited to engineers and procurement teams building or maintaining commercial embedded systems where a known i186-series processor, standard operating temperature range (0 °C to 70 °C), and RoHS compliance are required. Its combination of core functionality and system-level interfaces provides a durable platform for long-term production designs within its specified commercial grade limits.

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