Z85C3008PSC

Specialized Overview

The Z85C3008PSC is a CMOS Serial Communications Controller (SCC) from the Z85C30 family, designed for nonmultiplexed bus microprocessors. It features two independent full-duplex channels supporting data rates up to 4.1 Mbps. The device integrates separate crystal oscillators, Baud Rate Generators (BRG), and Digital Phase-Locked Loops (DPLL) for clock recovery in each channel. It supports asynchronous, synchronous, and SDLC/HDLC protocols with programmable data encoding including NRZ, NRZI, and FM. Electrical specifications include a supply voltage range of 4.5 V to 5.5 V and operation within a commercial temperature range of 0°C to +70°C. The component is housed in a 40-pin Plastic Dual In-Line Package (PDIP).

Specialized Feature Summary

• Dual-channel architecture with independent clocking and baud rate generation per channel.
• Multiprotocol support for asynchronous, synchronous byte-oriented, and bit-oriented SDLC/HDLC modes.
• Integrated hardware CRC generation and checking for data integrity verification.
• Enhanced DMA capabilities featuring a status FIFO and programmable interrupt daisy-chaining.

Specialized Applications

• High-speed serial data transfer for diskette and tape drive interfaces.
• T1 digital trunk communication systems.
• Modem control logic implementation.
• General-purpose I/O expansion via modem control pin reconfiguration.

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature rating. Confirm RoHS compliance status as legacy variants may differ. Check for End-of-Life notices or obsolescence declarations prior to procurement planning. Ensure availability of compatible replacement components if the part is discontinued.

Specialized Selection Notes

Select this model for applications requiring nonmultiplexed bus interfaces. Verify that the system clock frequency matches the required 8 MHz specification. Ensure the design accommodates the 40-pin DIP footprint. Consider the Z80C30 variant only if multiplexed bus compatibility is required.

Specialized Part Context

This component belongs to the Zilog SCC family, which includes the Z80C30 and Z85C30 series. These devices are CMOS versions of earlier NMOS controllers, offering lower power consumption and higher performance while maintaining pin and software compatibility. The Z85C30 specifically targets nonmultiplexed bus architectures.

Specialized Replacement Considerations

The Z85C3008PSG is a documented equivalent part number within the same product line. Verify functional equivalence regarding speed grade and package dimensions before substitution.