Z8523L08VSG

Specialized Overview

The Z8523L08VSG is a Serial Communication Controller (SCC) from the Zilog Z8523 family, designed for high-performance serial data transmission. It operates at a clock frequency of 8 MHz and supports standard 5V logic levels with a supply voltage range of 4.75 V to 5.25 V. The device features two independent serial channels capable of handling asynchronous, synchronous byte, HDLC, SDLC, X.25, BISYNC, and extended synchronous protocols. It is housed in a 44-pin Plastic Leaded Chip Carrier (PLCC-44) package suitable for surface mount technology. The component is rated for commercial operating temperatures between 0°C and +70°C.

Specialized Feature Summary

• Dual-channel architecture supporting simultaneous independent serial communication operations
• Integrated hardware support for complex protocol implementations including HDLC and X.25
• Built-in FIFO buffers to manage data flow and reduce processor intervention
• Direct compatibility with Z80 and Z180 microprocessor families via standard bus interfaces

Specialized Applications

• Network interface cards requiring serial protocol termination
• Industrial control systems utilizing RS-232 or RS-485 connections
• Embedded telecommunications equipment needing reliable data link layer processing
• Point-to-point serial communication links in legacy computing architectures

Specialized Procurement Notes

Verify RoHS compliance status as manufacturing records indicate variations within the Z8523 series. Confirm moisture sensitivity level (MSL 3) handling requirements during storage and assembly. Check for obsolescence notices or product change notifications affecting pinout or electrical characteristics. Ensure the specific suffix denotes the correct temperature grade and packaging format required for the target application.

Specialized Selection Notes

Select this component when dual-channel serial communication with hardware protocol offloading is required. Compare against the Z85230 series if higher clock speeds or different voltage tolerances are needed. Consider the Z8523L series variants if extended temperature ranges or 3.3V operation are necessary for the system design. Verify package availability and lead times given the mature status of this component family.

Specialized Part Context

This part belongs to the Z8523 SCC family, which serves as a bridge between parallel microprocessor buses and serial communication lines. It complements Zilog's microcontroller offerings by providing dedicated I/O expansion for serial data handling. The device reduces CPU load by managing timing, framing, and error checking autonomously.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers for the Z8523L08VSG were not found in the provided documentation. Engineering teams should consult official Zilog cross-reference guides or distributor databases for verified equivalents, as generic SCC replacements may lack specific protocol support or pin compatibility.