Z84C4408VEC

Specialized Overview

The Z84C4408VEC is a CMOS Serial I/O Controller manufactured by Zilog, Inc., designed for high-performance asynchronous and synchronous communication applications. It features two independent serial channels capable of data transfer rates up to 0.25 MBps. The device operates with a maximum clock frequency of 8 MHz and supports multiple communication protocols including ASYNC, BIT, SYNC BYTE, SYNC HDLC, SYNC SDLC, X.25, and BISYNC. It utilizes an 8-bit external data bus and is housed in a 44-pin PLCC package. The component functions within a supply voltage range of 4.75 V to 5.25 V and maintains operation across an industrial temperature range from -40 °C to +85 °C.

Specialized Feature Summary

• Dual-channel architecture supporting simultaneous independent serial data transmission and reception
• Integrated hardware support for complex synchronous protocols such as HDLC, SDLC, and X.25
• CMOS technology enabling low power consumption while maintaining compatibility with standard logic families

Specialized Applications

• Industrial automation systems requiring robust serial communication interfaces
• Telecommunications equipment utilizing X.25 or BISYNC protocol stacks
• Embedded control units managing multiple peripheral devices via serial links

Specialized Procurement Notes

Verify the specific suffix 'VEC' against the manufacturer's official datasheet to confirm pinout compatibility and thermal specifications. Confirm RoHS compliance status as legacy Zilog components may vary in environmental certification depending on production batch. Ensure that the 44-PLCC package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Specialized Selection Notes

Select this component when dual-channel serial I/O is required within a single integrated circuit. Compare against the Z84C40 series for DIP packaging alternatives if through-hole mounting is preferred. Evaluate the Z84C41 series if higher clock speeds exceeding 8 MHz are necessary for the application design constraints.

Specialized Part Context

This part belongs to the Z84C40 family of Serial I/O Controllers developed by Zilog. These controllers were designed to offload serial communication tasks from the main CPU in Z80-based systems. The Z84C44 variant specifically integrates the controller functionality into a 44-pin plastic leaded chip carrier package, distinguishing it from the DIP variants like the Z84C4008.

Specialized Replacement Considerations

Direct replacements include other members of the Z84C40 family such as the Z84C4008PEG or Z84C4208PEC, provided the package type difference between PLCC and DIP is accommodated. Verify functional equivalence with the Z84C4110PEC if higher speed operation is acceptable.