Z85C3008PEC

Specialized Overview

The Z85C3008PEC is a CMOS Serial Communications Controller (SCC) designed for nonmultiplexed bus microprocessors. It features two independent full-duplex channels supporting data rates from 0 to 4.1 Mbps. The device includes separate crystal oscillators, Baud Rate Generators (BRG), and Digital Phase-Locked Loops (DPLL) for clock recovery per channel. It supports asynchronous, synchronous, and SDLC/HDLC protocols with programmable data encoding (NRZ, NRZI, FM). Electrical specifications include a 4.5 V to 5.5 V supply voltage range and operation within a -40°C to +85°C temperature range. The component is housed in a 40-pin Dual In-line Package (PDIP).

Specialized Feature Summary

• Dual-channel architecture with independent clocking and baud rate generation.
• Multiprotocol support including asynchronous, synchronous byte-oriented, and bit-oriented modes.
• Integrated status FIFO and byte counter for enhanced DMA performance.
• Software interrupt acknowledge and daisy-chain interrupt hierarchy.

Specialized Applications

• High-speed serial data transfer applications such as diskette and tape drives.
• SDLC/HDLC protocol implementation requiring frame-level control and CRC checking.
• T1 digital trunk interface systems.

Specialized Procurement Notes

Verify the specific suffix 'PEC' against the manufacturer's ordering guide to confirm package type and temperature rating. Confirm end-of-life status prior to design-in, as availability may be restricted. Ensure compatibility with existing NMOS versions if upgrading legacy designs.

Specialized Selection Notes

Select this model for systems utilizing nonmultiplexed address/data buses. Verify that the required operating frequency aligns with the 8 MHz specification. Consider the PDIP package constraints for PCB layout compared to surface-mount alternatives like PLCC.

Specialized Part Context

This component belongs to the Z85C30 family of CMOS SCCs, which are pin and software compatible with earlier NMOS versions. The Z85C30 variant specifically targets nonmultiplexed bus architectures, distinguishing it from the Z80C30 used for multiplexed buses.

Specialized Replacement Considerations

Direct replacements include other Z85C30 variants with different speed grades or packages, such as Z85C3010VEC. Verify pinout compatibility when substituting across package types.