Z80C3008VSG

Specialized Overview

The Z80C3008VSG is a CMOS Serial Communications Controller (SCC) optimized for multiplexed bus microprocessors. It features two independent full-duplex channels supporting data rates from 0 to 4.1 Mbps. Each channel includes a dedicated crystal oscillator, Baud Rate Generator (BRG), and Digital Phase-Locked Loop (DPLL). The device supports asynchronous modes with 5-8 bit characters and programmable stop bits, synchronous byte-oriented protocols like Bisync, and bit-oriented protocols such as HDLC and SDLC. It operates at an 8 MHz clock speed within a 4.75 V to 5.25 V supply range, housed in a 44-pin PLCC package.

Specialized Feature Summary

• Dual-channel architecture with independent clock recovery mechanisms
• Multiprotocol support including asynchronous, synchronous, and SDLC/HDLC
• Integrated CRC generation and checking capabilities
• Enhanced DMA support with status FIFO and byte counter

Specialized Applications

• Serial communication interfaces for multiplexed bus systems
• T1 digital trunk applications
• Peripheral control for diskette or tape drives
• Modem interface circuits

Specialized Procurement Notes

Verify the specific suffix 'VSG' against current manufacturer documentation to confirm lead-free compliance and packaging details. Confirm availability status as distribution listings may indicate end-of-life or limited stock conditions. Ensure compatibility with existing system voltage levels and bus timing requirements before procurement.

Specialized Selection Notes

Select this component when interfacing with CPUs utilizing multiplexed address/data buses. Verify that the required operating frequency does not exceed 8 MHz. Consider the Z85C30 variant if the target system employs a nonmultiplexed bus architecture instead. Ensure software drivers are compatible with the SCC register set.

Specialized Part Context

This part belongs to the Zilog Z80C30/Z85C30 family of CMOS Serial Communications Controllers. It serves as a pin-compatible upgrade to earlier NMOS versions, offering lower power consumption and improved noise immunity while maintaining software compatibility. The Z80C30 specifically targets multiplexed bus environments.

Specialized Replacement Considerations

The Z85C30 series offers functional equivalence for nonmultiplexed bus designs. Earlier NMOS SCC versions provide pin compatibility but lack enhanced DMA and software interrupt features. Verify bus type compatibility when substituting.