Z8523016PEG

Specialized Overview

The Z8523016PEG is an Enhanced Serial Communications Controller (ESCC) from the Z85230 family, manufactured by Zilog. It features a parallel interface with a 44-pin PLCC package and operates at a maximum clock frequency of 16 MHz. The device supports dual serial channels (Channel A and Channel B) for asynchronous, synchronous, and SDLC data communications. It includes integrated hardware FIFOs: a 4-byte transmit buffer and an 8-byte receive buffer to reduce CPU overhead. Power supply requirements range from 4.5V to 5.5V, and it functions within a commercial temperature range of 0°C to 70°C.

Specialized Feature Summary

• Dual-channel architecture supporting independent asynchronous, synchronous, and SDLC protocols
• Integrated hardware FIFOs consisting of a 4-byte transmit buffer and an 8-byte receive buffer
• Vectored interrupt capability with daisy-chain support via IEI/IEO pins
• Direct DMA request generation through W/REQ and DTR/REQ pins

Specialized Applications

• High-speed serial communication interfaces in embedded systems
• Modem control and data terminal equipment (DTE)
• Network controller implementations requiring protocol offloading
• Industrial automation serial I/O expansion modules

Specialized Procurement Notes

Verify the specific suffix 'PEG' against the manufacturer's official ordering guide to confirm pinout compatibility and voltage specifications. Ensure the component meets the required environmental operating conditions for the target application. Cross-reference the datasheet revision history to confirm the presence of any errata or functional updates relevant to the production batch.

Specialized Selection Notes

Select this component when a microprocessor requires a dedicated peripheral for complex serial protocol handling without software overhead. It is suitable for designs needing simultaneous transmission and reception on two independent channels. Consider the PLCC package constraints and ensure the system bus timing aligns with the specified read/write cycle parameters.

Specialized Part Context

This component belongs to the Z85230/L ESCC family, which serves as a successor to the earlier SCC series. It provides enhanced performance through improved FIFO structures and additional control registers like WR7'. The Z85230 variant specifically utilizes a standard parallel interface distinct from the Z80230 multiplexed address/data bus.

Specialized Replacement Considerations

The Z8523016VSC is a documented alternative within the same family offering identical functionality in a PLCC-44 package. Verify that the voltage tolerance and temperature range of the substitute match the original design requirements.