Z8S18020VSG1960

Overview

The Z8S18020VSG1960 is a microprocessor based on the Z180 core, operating at a maximum clock frequency of 20 MHz. It features an 8-bit data bus and supports up to 1 MB of addressable memory via its expanded MMU. The device operates on a 3.3 V supply voltage and includes two enhanced UARTs, two 16-bit counter/timers, and two chain-linked DMA channels. It is housed in a 68-pin PLCC package with an operating temperature range of 0°C to +70°C.

Feature Summary

• Code compatible with ZiLOG Z80 CPU while offering extended instructions and faster execution speeds.
• Integrated system resources including two chain-linked DMA channels for high-speed data transfers.
• Features three low-power-down modes to reduce energy consumption during idle or specific operational states.
• Includes on-chip interrupt controllers, wait-state generators, and an oscillator for simplified system design.

Applications

• Embedded systems requiring backward compatibility with legacy Z80 software.
• Industrial control applications utilizing on-chip serial communication interfaces.
• Data acquisition systems leveraging DMA capabilities for efficient memory access.
• Battery-powered devices utilizing low-power-down modes for extended operation.

Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence notices. Confirm package integrity and pin alignment prior to soldering. Ensure static discharge precautions are observed during handling. Validate that the 3.3V power supply meets stability requirements for the specified operating temperature range.

Selection Notes

Select this component when Z80 instruction set compatibility is required alongside enhanced peripheral integration. Consider the 68-pin PLCC package for surface-mount assembly constraints. Evaluate the 20 MHz speed against system timing requirements. Ensure the 3.3V logic level matches connected peripherals or utilize appropriate level shifting if necessary.

Part Context

This processor belongs to the Z8S180 family, which enhances the original Z180 architecture. It combines a high-performance CPU core with integrated I/O resources such as ASCI, PRT, and CSI/O channels. The family supports extended memory addressing and offers improved power efficiency compared to earlier generations.

Replacement Considerations

Check for direct substitutes within the Z8S180 series with different speed grades or packaging options. Verify pin-to-pin compatibility with existing designs before substituting. Review datasheets for any changes in electrical characteristics or register mappings between variants.