Z8S18033VSG

Overview

The Z8S18033VSG is a static microprocessor based on the Z180 architecture, manufactured by ZiLOG. It features an 8-bit data bus and operates at a maximum clock frequency of 33 MHz. The device is housed in a 68-pin PLCC package with surface mount installation. It requires a 5 V operating supply voltage and supports an industrial temperature range from -40°C to +85°C. Key integrated peripherals include two DMA channels, two asynchronous serial communication interfaces (ASCI), two programmable reload timers, and a clocked serial I/O channel.

Feature Summary

• Code compatible with the legacy Z80 CPU while providing extended instruction sets and enhanced performance.
• Integrated dual chain-linked DMA channels for high-speed memory and I/O transfers.
• On-chip interrupt controllers and three wait-state generators for flexible system timing.
• Supports multiple low-power-down modes to reduce energy consumption during idle states.

Applications

• Industrial control systems requiring robust interrupt handling
• Embedded applications utilizing asynchronous serial communication
• Memory-intensive designs leveraging expanded MMU addressing
• Systems requiring direct memory access for peripheral data transfer

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to potential obsolescence. Confirm specific ordering suffixes match required package and temperature grades. Check for recent Product Change Notices regarding manufacturing site or material updates. Ensure compatibility with existing board layouts for the 68-pin PLCC footprint. Validate supply chain stability as this model may have limited availability.

Selection Notes

Select this variant when a 33 MHz processing speed within the extended industrial temperature range is required. The 68-pin PLCC package suits surface-mount designs needing a compact form factor. Consider the integrated ASCI and DMA resources to minimize external component count. Verify that the 5 V logic levels align with the target system's I/O requirements. Evaluate power consumption profiles against available low-power modes for battery-operated constraints.

Part Context

This component belongs to the Z8S180 series, which enhances the original Z80 architecture with additional on-chip peripherals. It serves as a drop-in replacement for many Z80-based designs while offering increased functionality. The series includes variants with different clock speeds and packaging options to suit various embedded market needs.

Replacement Considerations

Direct substitutes include other Z8S180 series members such as the Z8S18020VSG for lower clock speeds. Cross-reference pinouts and electrical characteristics carefully when considering alternative manufacturers' Z80-compatible processors.

FAQ

Does the Z8S18033VSG support full backward compatibility with Z80 software?

Yes, it is code compatible with the ZiLOG Z80 CPU, allowing existing Z80 programs to run without modification.

What is the maximum addressable memory space?

The device features an expanded MMU that allows addressing up to 1 MB of memory.

How many DMA channels are integrated on the chip?

The processor includes two on-chip DMA channels that can be chain-linked for continuous operation.