Z8L18020VSC

Overview

The Z8L18020VSC is a microprocessor featuring the Z180 core, operating at a maximum clock frequency of 20 MHz with an 8-bit data bus width. It utilizes a 68-pin PLCC package and supports surface mount installation. The device functions on a 3.3 V supply voltage with matching I/O levels. It operates within a commercial temperature range of 0°C to +70°C. Key integrated peripherals include two timers/counters and UART interfaces.

Feature Summary

• Backward compatible with ZiLOG Z80 CPU instruction sets while offering extended instructions and faster execution speeds.
• Integrates dual chain-linked DMA channels for high-speed memory-to-memory or I/O transfers without CPU intervention.
• Includes two enhanced asynchronous serial communication interfaces (ASCI) with programmable baud rate generators and FIFO buffers.
• Provides multiple low-power down modes to reduce consumption during idle states, including stop and standby options.

Applications

• Industrial control systems requiring robust serial communication
• Embedded applications needing extended memory addressing via MMU
• Data acquisition systems utilizing DMA for efficient data transfer
• Battery-powered devices benefiting from low-power operational modes

Procurement Notes

Verify component authenticity through authorized distributors due to potential availability constraints. Confirm package integrity upon receipt, as moisture sensitivity requires proper handling. Ensure design compatibility with 3.3 V logic levels and 68-pin PLCC footprint. Review datasheet specifications for timing requirements before integration into final hardware designs.

Selection Notes

Select this model when Z80 code compatibility is required alongside enhanced peripheral integration. Consider the 20 MHz speed limit and 3.3 V operation for power-sensitive designs. Evaluate the need for dual DMA channels and ASCI ports against alternative processors. Verify that the 68-pin PLCC package fits the target PCB layout constraints.

Part Context

This component belongs to the Z8L180 series, an enhanced version of the Z180 architecture. It builds upon the legacy Z80 processor lineage while incorporating modern features like expanded memory management and improved serial interfaces. The series targets embedded markets demanding reliability and backward compatibility.

Replacement Considerations

Z8S18020VSG: Pin-compatible upgrade with similar specifications.

FAQ

Does the Z8L18020VSC support direct replacement of Z80 processors?

Yes, it maintains object-code compatibility with the Z80 CPU while providing additional instructions and features.

What is the maximum addressable memory space?

The integrated Memory Management Unit allows addressing up to 1 MB of memory space.