Z8S18020PSC

Overview

The Z8S18020PSC is a microprocessor IC based on the Z180 core, featuring an 8-bit data bus and a maximum clock speed of 20 MHz. It is housed in a 64-pin DIP package with a pitch of 0.750 inches (19.05 mm). The device operates within a temperature range of 0°C to +70°C and supports I/O voltages of 3.3 V or 5.0 V depending on configuration. Key integrated peripherals include two asynchronous serial communication interfaces (ASCI), two 16-bit programmable reload timers, two chain-linked DMA channels, and an expanded MMU supporting up to 1 MB of address space.

Feature Summary

• Code compatible with ZiLOG Z80 CPU while providing extended instructions and faster execution speeds.
• Integrated dual DMA channels capable of chain-linking for nonstop data transfer operations.
• Features two enhanced UARTs with baud rate generators supporting asynchronous data rates up to 512 Kbps.
• Includes multiple low-power-down modes to reduce consumption during idle states.

Applications

• Embedded systems requiring backward compatibility with legacy Z80 software.
• Industrial control applications utilizing integrated timer and interrupt controllers.
• Data acquisition systems leveraging high-speed DMA transfers between memory and I/O devices.

Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to discontinuation notices. Confirm specific voltage requirements and pinout configurations against the official datasheet before integration. Ensure handling procedures account for moisture sensitivity levels if applicable. Review product change notifications for any manufacturing updates that might affect mechanical or electrical characteristics.

Selection Notes

Select this component when system design requires Z80 instruction set compatibility alongside enhanced peripheral integration. Consider the 64-pin DIP package for through-hole mounting requirements. Evaluate power consumption needs against available low-power modes. Ensure external clock sources align with the supported frequency ranges and oscillator configurations specified in the technical documentation.

Part Context

This microprocessor belongs to the Z8S180 series, which enhances the original Z80180 architecture. It combines a high-performance CPU core with extensive on-chip resources including memory management and serial communication interfaces. The series maintains object-code compatibility with the Z80 while offering improved performance and reduced EMI noise through advanced design features.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify cross-compatibility with other Z8S180 variants such as Z8S18010PSC or Z8L18020PSG by comparing pinouts, voltage levels, and functional specifications in their respective datasheets.