Intel EN80C186EA20

Mfr. Part

EN80C186EA20

Manufacturer

Intel

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Detailed Description

16-bit Intel 80186-class embedded microprocessor, CMOS process

Target frequency class indicated by suffix 20 (commonly 20 MHz)

x86 instruction set compatible with 8086/80186 software ecosystem

Integrates common system logic to reduce external components and board space

Key Features

16-bit CPU core with 20-bit address space (up to 1 MB external memory)

Typical 80186-family peripherals integrated

- Programmable interrupt controller

- Timers/counters

- DMA channels

- Chip-select and wait-state generation

- Clock and bus control logic

External memory/bus interface

- 16-bit data bus, multiplexed address/data lines

- Programmable chip selects for ROM/RAM/IO

Low-power CMOS with idle/halt modes

Mature, deterministic real-time behavior suitable for control systems

Industrial and commercial temperature options exist by ordering code (verify for EN prefix in datasheet)

Key Advantages

Fewer external glue-logic ICs, smaller PCB, lower BOM cost

Proven, long-used 80186 ecosystem with robust toolchain and OS/RTOS options

Software reuse from 8086/80186 code bases lowers development time and risk

Simple, predictable timing for real-time control

Stable long-term behavior for legacy and maintenance programs

Packaging

Shipping format

- Bulk

IC package options for the 80C186EA family

- Common options historically include PLCC and QFP variants (pin counts such as 68-pin PLCC and 80-pin QFP are typical for this family; confirm exact package for EN80C186EA20 in the datasheet)

Material and mechanical

- Plastic encapsulation, JEDEC-standard outlines depending on package

- Mechanical dimensions and land patterns vary by package option; see datasheet mechanical drawings

Pin configuration

- Multiplexed address/data bus

- 16-bit data bus, 20-bit address space

- Control pins for memory/IO chip selects, ready/wait, interrupts, DMA, clock, reset

Thermal characteristics

- Thermal resistance and maximum junction temperature depend on package and ambient conditions

- Use datasheet thermal data and a proper thermal model for your enclosure and airflow

Electrical properties

- Nominal operation at 5 V CMOS (verify VCC tolerance in datasheet, typically around 5 V ±10%)

- Frequency class up to 20 MHz for the -20 speed grade

- Logic-level compatible I/O for standard 5 V systems

- Power consumption depends on frequency, voltage, and mode (idle/halt reduce power)

Lifecycle

Status

- This product family is mature and many variants are discontinued or not recommended for new designs. Treat as a legacy/maintenance-life component.

Equivalent or alternative models

- Same-family Intel options (board- and firmware-dependent; verify pinout and registers)

- 80C186EB

- 80C186EC

- 80C186XL

- 80C188EA/EB/EC (8-bit external data bus variants if your design allows)

- Second-source or compatible 186-class devices (system-level compatibility varies; confirm timing, pinout, and peripherals)

- AMD Am186EM/Am186ES/Am186ED series

- If you need a direct, drop-in replacement list with guaranteed compatibility for EN80C186EA20, please contact our sales team via the Y-IC website. We will verify availability, form-fit-function, and lifecycle status for your exact requirement.

Migration guidance

- For new designs, consider modern MCUs/SoCs that meet performance and longevity targets

- For existing designs, Y-IC can help with last-time-buy, screened pulls, tested surplus, or vetted alternates

Key Application Areas

Industrial control and automation PLCs and motion controllers

Motor drives and power conversion control

Instrumentation, test and measurement

Point-of-sale terminals, kiosks, printers

Telecom/communications line cards and modems from legacy platforms

Storage and peripheral controllers in legacy systems

Transportation and building automation

Any 8086/80186 software-based embedded system requiring long-term maintenance

Datasheet

Y-IC hosts the most authoritative and up-to-date datasheet for EN80C186EA20 on our product page. We strongly recommend downloading the datasheet from our site to confirm package, pinout, electrical limits, timing, and thermal data for your exact part.

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