80C186EA/80C188EA, 80L186EA/80L188EA

272432 – 7

Figure 7. Shrink Quad Flat Pack (SQFP) Pinout Diagram

NOTES:

1.XXXXXXXXD indicates the Intel FPO number.

2.Pin names in parentheses apply to the 80C188EA.

PACKAGE THERMAL

SPECIFICATIONS

The 80C186EA/80L186EA is specified for operation when TC (the case temperature) is within the range of 0§C to 85§C (PLCC package) or 0§C to 106§C (QFP-EIAJ) package. TC may be measured in any environment to determine whether the processor is within the specified operating range. The case tem- perature must be measured at the center of the top surface.

TA (the ambient temperature) can be calculated from iCA (thermal resistance from the case to ambi- ent) with the following equation:

TA e TC - P c iCA

Typical values for iCA at various airflows are given in Table 10.

P (the maximum power consumption, specified in watts) is calculated by using the maximum ICC as tabulated in the DC specifications and VCC of 5.5V.

Table 10. Thermal Resistance (iCA) at Various Airflows (in §C/Watt)

 

 

Airflow Linear ft/min (m/sec)

 

 

 

 

 

 

 

 

0

200

400

600

800

1000

 

(0)

(1.01)

(2.03)

(3.04)

(4.06)

(5.07)

 

 

 

 

 

 

 

iCA (PLCC)

29

25

21

19

17

16.5

iCA (QFP)

66

63

60.5

59

58

57

iCA (SQFP)

70

 

 

 

 

 

20

20

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Intel 80L186EA, 80L188EA, 80C188EA, 80C186EA Package Thermal Specifications, 400 600 800 1000 CA Plcc, CA QFP 60.5 CA Sqfp

80L186EA, 80L188EA, 80C186EA, 80C188EA specifications

The Intel 80C188EA, 80C186EA, 80L188EA, and 80L186EA microprocessors represent significant developments in the realm of embedded computing during the 1980s. These processors are part of Intel's x86 architecture, designed to cater to a variety of industrial applications, including automotive and telecommunications.

The 80C188EA and 80C186EA are CMOS variants that offer enhanced power efficiency and reduced heat generation compared to their NMOS predecessors. Operating at clock speeds of up to 25 MHz, these processors are known for their performance in real-time applications. The 80C188EA features a 16-bit data bus and a 16-bit address bus, which can support up to 1 MB of addressable memory. It also boasts an extended instruction set for greater computing flexibility, making it suitable for intricate tasks in embedded systems.

Similarly, the 80C186EA is characterized by its 16-bit architecture, but it includes additional on-chip memory management capabilities. This processor can handle 256 KB of memory directly and supports paged memory management, facilitating efficient multitasking and resource sharing in complex applications. Its integrated DMA controller and interrupt controller allow for superior handling of peripheral devices, making it ideal for real-time processing requirements.

On the other hand, the 80L188EA and 80L186EA are low-power variants optimized for battery-operated designs. These microprocessors are tailored for applications where power consumption is critical. The 80L188EA retains the essential features of the 80C188EA but operates at lower voltage levels, thus allowing for longer operational life in portable devices. The 80L186EA similarly benefits from reduced power consumption, taking advantage of its energy-efficient design to enhance durability in industrial automation scenarios.

All four processors leverage Intel's established x86 architecture, enabling a wide range of software compatibility. Their built-in support for real-time interrupt handling and I/O operations provides developers with valuable tools for building reliable embedded systems. Additionally, they feature on-chip oscillators and timers, further streamlining design requirements and reducing the need for external components.

Overall, the Intel 80C188EA, 80C186EA, 80L188EA, and 80L186EA processors are ideal for diverse applications in embedded systems. Their blend of processing power, energy efficiency, and versatility continues to influence the design of modern electronic devices, underscoring Intel's pivotal role in advancing microprocessor technology.