Z8S18020VEC

Overview

The Z8S18020VEC is a microprocessor IC based on the Z180 core, manufactured by Zilog. It features an 8-bit architecture with a maximum clock speed of 20 MHz and operates within a single-core configuration. The device is housed in a 68-pin PLCC (J-Lead) surface-mount package. It supports a 5.0V I/O voltage level and functions across an operating temperature range of -40°C to +100°C. Key integrated peripherals include two ASCI channels, CSIO, and UART interfaces.

Feature Summary

• Provides full backward compatibility with existing ZiLOG Z80 devices while offering extended instruction sets and faster execution speeds.
• Integrates two chain-linked DMA channels for high-speed data transfers between memory and I/O devices without CPU intervention.
• Includes two enhanced asynchronous serial communication interfaces (ASCI) with FIFO buffers and baud rate generators supporting up to 512 Kbps.
• Offers multiple low-power-down modes including Halt, Sleep, and Standby to reduce power consumption during idle states.

Applications

• Embedded systems requiring Z80 code compatibility with enhanced peripheral integration
• Industrial control applications utilizing on-chip timers and interrupt controllers
• Communication equipment leveraging dual UART/ASCI channels for serial data transfer

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm RoHS compliance requirements as the part may be non-compliant depending on production batch. Ensure handling procedures account for moisture sensitivity level 3 specifications during storage and reflow soldering processes.

Selection Notes

Select this component when legacy Z80 software compatibility is mandatory alongside modern peripheral enhancements. Consider the 68-PLCC package constraints for PCB layout and thermal management. Evaluate the 20 MHz operational limit against system timing requirements and ensure voltage levels match the 5.0V I/O specification.

Part Context

This part belongs to the Z8S180 series, which enhances the original Z80180 design. It shares architectural similarities with the Z8L180 but differs in power characteristics and packaging options. The Z8S180 variant typically targets standard voltage applications compared to the low-power Z8L180 line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, alternative sourcing requires careful evaluation of pinout and electrical parameter compatibility with existing designs.