Z8523020PSC

Specialized Overview

The Z8523020PSC is a CMOS Enhanced Serial Communication Controller (ESCC) manufactured by ZiLOG. It features dual full-duplex serial channels and operates at processing speeds up to 20 Mbps. The device supports multi-protocol formats including asynchronous, monosync, bisync, SDLC/HDLC, and SDLC/HDLC loop modes. Encoding capabilities include NRZI, FM0, FM1, and Manchester modes with CRC-16 or CRC-CCITT error detection. Each channel accommodates a crystal oscillator, baud rate generator, and digital phase-locked loop. The component utilizes a 4-byte transmit FIFO and an 8-byte receive FIFO per channel. It is housed in a DIP-40 package and functions within an operating temperature range of 0°C to +70°C.

Specialized Feature Summary

• Dual full-duplex serial communication channels
• Multi-protocol support for async, bisync, and HDLC/SDLC
• Integrated baud rate generation and clocking
• Hardware FIFO buffers for data handling

Specialized Applications

• High-speed serial networking interfaces
• Computer peripheral connectivity systems
• Data acquisition equipment requiring reliable serial links

Specialized Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm pinout compatibility and environmental ratings. Confirm that the DIP-40 through-hole package matches the target PCB footprint. Ensure the 0°C to +70°C commercial temperature range meets system requirements before procurement.

Specialized Selection Notes

Select this component when high throughput up to 20 Mbps is required for dual-channel applications. Compare against the Z85C30 family if lower speeds are sufficient, or consider the Z16C30 series for faster performance needs. Verify that the non-multiplexed bus interface aligns with the host microprocessor architecture.

Specialized Part Context

This part belongs to the ZiLOG ESCC family, which enhances standard SCC functionality with improved software ease and reduced CPU overhead. It serves as a bridge between parallel processor buses and serial transmission lines, replacing discrete logic solutions for complex serial protocols.

Specialized Replacement Considerations

The Z8523020VSC offers identical electrical specifications but utilizes a PLCC-44 surface-mount package instead of the DIP-40 form factor.