Z8S18020VSC

Overview

The Z8S18020VSC is a static microprocessor based on the Z180 core, manufactured by ZiLOG. It features an 8-bit data bus and supports maximum clock speeds of 20 MHz. The device operates at a supply voltage of 3.3 V and functions within a commercial temperature range of 0°C to +70°C. It is housed in a 68-pin PLCC surface-mount package. Key integrated resources include two DMA channels, two enhanced UARTs, two 16-bit counter/timers, and an on-chip oscillator.

Feature Summary

• Code compatible with the ZiLOG Z80 CPU while providing extended instructions and faster execution speeds.
• Supports chain-linked DMA channels for nonstop data transfer operations between peripherals.
• Includes three low-power-down modes to reduce energy consumption during idle or specific operational states.
• Features an on-chip oscillator/generator and expanded MMU addressing capabilities up to 1 MB.

Applications

• Embedded systems requiring backward compatibility with legacy Z80 software.
• Industrial control applications utilizing serial communication interfaces.
• Data acquisition systems employing direct memory access for high-speed transfers.
• Battery-powered devices leveraging low-power-down operational modes.

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance details as specified in official documentation. Ensure handling procedures account for moisture sensitivity levels indicated in datasheets. Validate pinout configurations against the specific 68-pin PLCC package variant prior to integration into printed circuit board designs.

Selection Notes

Select this component when system requirements demand Z80 instruction set compatibility alongside enhanced peripheral integration. Consider the 3.3 V operating voltage constraint for power supply design. Evaluate the 20 MHz speed limit against processing needs. The PLCC-68 package dictates specific footprint requirements for surface-mount assembly processes.

Part Context

This part belongs to the Z8S180 series, which enhances the original Z80180 architecture. It offers improved performance and power efficiency compared to predecessors. The series supports multiple packaging options including DIP and QFP variants. It serves as a bridge between legacy Z80 ecosystems and modern embedded requirements.

Replacement Considerations

Z8S18020VSG: Same specifications with different suffix indicating potential packaging or environmental variation. Z8S18020PSC: Identical electrical characteristics but housed in a 64-pin DIP package instead of PLCC.