M74HC670B1R

Overview

The M74HC670B1R is a high-speed CMOS 4-word by 4-bit register file featuring three-state outputs, fabricated using silicon gate C2MOS technology. It supports simultaneous read and write operations through separate address and enable inputs. The device operates within a wide supply voltage range of 2V to 6V and provides symmetrical output impedance with balanced propagation delays. Designed for robust performance, it includes protection circuits against static discharge and transient excess voltages on all inputs.

Feature Summary

• Supports simultaneous read and write operations via independent address and enable inputs
• Features three-state outputs allowing parallel connection to expand word capacity
• Includes input protection circuits against static discharge and transient excess voltages

Applications

• Memory expansion systems requiring multiple register files connected in parallel
• Digital logic designs needing simultaneous data access and storage capabilities
• High-speed data processing applications utilizing CMOS technology

Procurement Notes

Verify component authenticity and physical condition upon receipt. Confirm the package type matches the DIP-16 specification. Check datasheets for updated electrical characteristics as specifications are subject to change without notice. Ensure proper handling procedures are followed due to sensitivity to electrostatic discharge.

Selection Notes

Select this component when a 4x4 bit register file with three-state outputs is required. Consider its compatibility with standard 74 series logic functions. Evaluate the operating voltage range and temperature specifications against system requirements. Assess the need for simultaneous read/write functionality and parallel bus expansion capabilities.

Part Context

This part belongs to the M74HC670 series of high-speed CMOS register files. It is functionally compatible with the 74 series 670. The B1R suffix indicates a plastic DIP package variant. The series utilizes C2MOS technology to achieve high speed while maintaining low power consumption typical of CMOS devices.

Replacement Considerations

The M74HC670B1R is listed as an obsolete product. Verify availability of direct replacements or equivalent components from other manufacturers that meet the same functional and pinout specifications.