Z80C3008PSC

Specialized Overview

The Z80C3008PSC is a CMOS Serial Communications Controller (SCC) from the Z80C30 family, designed for multiplexed bus microprocessors. It features two independent full-duplex channels supporting data rates up to 4.1 Mbps. The device includes programmable baud rate generators, digital phase-locked loops for clock recovery, and FIFO buffers. It supports asynchronous modes with configurable character lengths and stop bits, as well as synchronous modes with CRC generation. Operating voltage is typically 5V, with an industrial temperature range of -40°C to +85°C in some variants, though commercial grades exist. It is housed in a 40-pin DIP package.

Specialized Feature Summary

• Dual-channel architecture with independent full-duplex operation for simultaneous serial communication tasks.
• Integrated digital phase-locked loop and baud rate generator for precise clock recovery and synchronization.
• Supports multiple protocol modes including SDLC/HDLC with automatic zero insertion/deletion and CRC verification.
• Enhanced DMA capabilities with status FIFO and byte counters to reduce processor overhead during high-speed transfers.

Specialized Applications

• Multiplexed bus systems requiring high-speed serial interface control.
• Network terminals and modems utilizing SDLC or HDLC protocols.
• Industrial control systems needing robust asynchronous/synchronous communication channels.
• T1 digital trunk line interfaces requiring specific framing and error detection.

Specialized Procurement Notes

Verify RoHS compliance status as older Zilog parts may not meet current environmental standards. Confirm package availability since PDIP-40 variants are legacy items. Check for moisture sensitivity level requirements if storage conditions have been uncontrolled. Ensure the specific speed grade matches system timing constraints, as 8 MHz is standard for this suffix but verify against the manufacturer's latest datasheet for any revisions.

Specialized Selection Notes

Select the Z80C30 variant specifically for multiplexed address/data buses; use Z85C30 for non-multiplexed buses. Compare pin compatibility with NMOS predecessors if upgrading existing designs. Evaluate thermal requirements as commercial (0-70°C) and industrial (-40-85°C) grades differ. Consider the Z84C30 series if timer functions are also required alongside serial control.

Specialized Part Context

Part of the Z80C30 family, which serves as the CMOS successor to the NMOS Z80S30. It maintains pin compatibility for easy migration. The Z80C30 series is distinct from the Z85C30, which targets different bus architectures. This component bridges legacy Z80-based systems with modern high-speed serial requirements.

Specialized Replacement Considerations

Z85C3008PEC is functionally similar but intended for non-multiplexed buses. Z80C3010VSG offers a higher speed grade (10 MHz) in a PLCC package. Verify electrical compatibility before substituting, as bus timing differences between Z80 and Z85 families may require circuit adjustments.