Z8523008PEG

Specialized Overview

The Z8523008PEG is an Enhanced Serial Communications Controller (ESCC) manufactured by Zilog. It operates as a dual-channel, multiprotocol data communication peripheral designed for integration with 8- and 16-bit microprocessors. The device functions as a serial-to-parallel and parallel-to-serial converter, supporting asynchronous formats and synchronous protocols including IBM Bisync, HDLC, and SDLC. Key internal features include on-chip baud rate generators, digital phase-lock loops, and crystal oscillators to minimize external logic requirements. The component utilizes a PLCC-44 package and supports standard TTL levels for data transmission and reception.

Specialized Feature Summary

• Dual-channel architecture supporting simultaneous independent serial data operations
• Integrated FIFO buffers including a 4-byte transmit buffer and an 8-byte receive buffer
• Support for multiple synchronization modes including internal, external, and monosync
• Programmable interrupt handling with vectored interrupt support and daisy-chain capability

Specialized Applications

• Serial-to-parallel conversion in embedded microprocessor systems
• Implementation of LAN and telecommunication interface protocols
• Radar relay equipment signal detection and maintenance platforms
• Multiprotocol data communication peripherals for industrial control

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product specification document PS005309-0515 to confirm pinout compatibility and voltage requirements. Ensure that the PLCC-44 package dimensions match the target PCB footprint. Confirm availability status as legacy components may have limited supply chains or require alternative sourcing strategies.

Specialized Selection Notes

Select this component when a dual-channel serial controller with hardware protocol support for HDLC and SDLC is required. The integrated baud rate generator and DPLL reduce the need for external clocking circuitry. Verify that the host microprocessor bus timing aligns with the ESCC read/write cycle specifications. Consider the interrupt vector capabilities if nested interrupt handling is necessary for system performance.

Specialized Part Context

The Z8523008PEG belongs to the Z85230 family of Enhanced Serial Communications Controllers. This family serves as a successor to earlier SCC models, offering enhanced FIFO depths and additional programming registers such as Write Register 7 Prime. The device is part of Zilog's broader portfolio of communication controllers designed for high-reliability data transfer applications.

Specialized Replacement Considerations

The Z85C30 series offers similar functionality but typically utilizes a DIP-40 package rather than PLCC-44. The Z80230 variant provides a different bus interface compatible with Z80 processors. Verify electrical characteristics and pin assignments before substituting any cross-model components.