Z8523020PSG

Specialized Overview

The Z8523020PSG is an Enhanced Serial Communications Controller (ESCC) manufactured by Zilog. It operates within a supply voltage range of 4.5V to 5.5V and utilizes a 40-pin Dual In-line Package (PDIP). The device supports bus interface protocols for microprocessor peripheral communication. Key electrical parameters include the specified operating voltage window and the physical package dimensions associated with the 40-PDIP form factor.

Specialized Feature Summary

• Dual-channel architecture supporting independent serial data transmission and reception
• Integrated FIFO buffers including a 4-byte transmit buffer and an 8-byte receive buffer
• Support for multiple communication protocols such as SDLC, BISYNC, and asynchronous modes
• Vectored interrupt capabilities with daisy-chain support via IEI/IEO pins

Specialized Applications

• Serial I/O controller applications in embedded systems
• Modem control interfaces requiring hardware flow control
• Data communications equipment utilizing HDLC or SDLC protocols

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix designation matches the required package and temperature grade. Check for Obsolete status notifications as this series has been subject to discontinuation notices. Ensure compatibility with existing system voltage levels before integration.

Specialized Selection Notes

Select this component when a dedicated serial communications controller with dual channels is required. Compare against the Z80230 variant if a multiplexed address/data bus interface is preferred over the separate data/address lines of the Z85230. Consider the PDIP package availability for through-hole mounting requirements versus surface mount alternatives like PLCC.

Specialized Part Context

This part belongs to the Z80230/Z85230/L ESCC family. It serves as a specialized interface chip designed to offload serial communication tasks from the main CPU. The Z85230 variant specifically features a non-multiplexed bus interface, distinguishing it from the Z80230 which uses address/data multiplexing.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The Z80230 series has been marked as OBS (Obsolete) with a notice date of April 11, 2025. Designers should evaluate long-term availability risks.