Product Descriptions

The Am486DX4 microprocessor is a high-performance 486 desktop solution that provides optimal price/performance for high-end 486 power-managed systems. The Am486DX4 CPU offers superior local bus graphics performance for Microsoft® Windows®.

Using AMD's speed-multiplying technology, the Am486DX4 CPU and cache operate two to three times faster than the external memory bus. lt is manufactured using AMD's new 3.3-V CMOS process technology to consume about 2.6 watts of power at 100 MHz or 3.2 watts at 120 MHz. This 3.3-V technology provides superior solutions for low-power EPA's Energy Star Green PCs and portables.

The Am486DX4 processor operates with a 1X clock in-put. This 1X clock simplifies system design by reducing the clock frequency required by external devices. The 1X clock also reduces RF emission and simplifies clock generation.The input signal is doubled or tripled internally to achieve the maximum 2X or 3X operating frequency. The phases of the core clock are controlled by an internal Phase Lock Loop (PLL) ci

• Operating voltage range 3.3 V ± 0.3 V

- 120-MHz operating frequency uses a 40-MH zexternal bus

- 100-MHz operating frequency uses a 33-MH zexternal bus

- Wide range of chipsets and support available through the AMD FusionPCsm Program

• High integration On-Chip

- 8-Kbyte code and data cache

- Floating-point unit

- Paged, virtual memory management

• High-Performance Design

- Frequent instructions execute in one clock 

- 105.6-Million bytes/second burst bus at 33 MHz

- 128-Million bytes/second burst bus at 40 MHz

- 0.5-micron CMOS process technology 

- Dynamic bus sizing for 8, 16, and 32-bit buses

• Compiete 32-Bit Architecture

- Address and data buses

- All registers

- 8, 16, and 32-bit data types

• Multiprocessor Support

- Multiprocessor instructions

- Cache consistency protocols

- Support for second-level cache

• Standard 168-Pin PGA Package

• Supports Environmental Protection Agency's(EPA) “Energy Star” program

- Energy management capability provides excel-lent base for energy-efficient design

- Works with a variety of energy efficient, powermanaged devices

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