Z84C4408VEC00TR

Specialized Overview

The Z84C4408VEC00TR is a specialized I/O controller interface integrated circuit manufactured by Zilog. It belongs to the Z84C44 series and is designed for high-performance serial communication tasks. The device operates on a single 5V supply voltage and utilizes a 44-pin PLCC (Plastic Leaded Chip Carrier) surface-mount package. It supports multiple synchronous and asynchronous communication protocols, including HDLC, SDLC, X.25, and BISYNC. The component features two independent serial channels capable of data transfer rates up to 0.25 MBps. It is compatible with the Z80 processor bus architecture and includes built-in DMA support for efficient data handling without excessive CPU intervention.

Specialized Feature Summary

• Dual-channel serial I/O capability supporting complex protocol stacks
• Integrated DMA controller for high-throughput data transfers
• Hardware implementation of HDLC, SDLC, and X.25 standards
• Z80 bus-compatible interface for seamless system integration

Specialized Applications

• Network terminal adapters requiring HDLC/SDLC processing
• Industrial control systems utilizing X.25 communication
• High-speed serial data acquisition interfaces
• Embedded controllers needing dedicated DMA-driven I/O

Specialized Procurement Notes

Verify the specific suffix 'VEC00TR' against the manufacturer's current datasheet to confirm pinout and electrical characteristics, as suffixes often denote temperature range or tape-and-reel packaging variations. Confirm RoHS compliance status, as older Zilog parts may have non-compliant variants. Check for obsolescence notices or PCNs, as this part number appears in legacy product lists. Ensure the supplier provides genuine Zilog components to avoid counterfeit risks associated with discontinued CMOS logic.

Specialized Selection Notes

Select this component when a Z80-based system requires robust, hardware-offloaded serial communication with DMA capabilities. Compare against the Z84C40 series if fewer channels or different protocol support are sufficient. Consider the PLCC-44 package constraints for PCB layout versus DIP alternatives like the Z84C4008PEG. Verify that the 5V logic levels match the target system's I/O requirements. Evaluate thermal performance within the specified operating temperature range for the VEC variant.

Specialized Part Context

This component is part of the Zilog Z84C40 family of Serial I/O Controllers, which also includes variants like the Z84C4008 and Z84C4110. These devices were designed to offload serial communication tasks from the main Z80 CPU. The Z84C44 series specifically targets applications requiring advanced protocol handling such as X.25 and HDLC. It represents the CMOS evolution of earlier NMOS Z8440 devices, offering lower power consumption and higher speed compatibility.

Specialized Replacement Considerations

Direct pin-to-pin replacements are limited due to the specialized nature of the Z84C44 series. The Z84C4008PEC or Z84C4008PEG may serve as functional substitutes if X.25/HDLC hardware support is not strictly required. The Z84C4110 offers similar I/O capabilities but may differ in supported protocols. Verify software compatibility when migrating between Z84C40 and Z84C44 variants, as register sets may vary.