SN74LS670NS

Overview

The SN74LS670NS is a register file integrated circuit manufactured by Texas Instruments, belonging to the SN74LS series. It features a 4-by-4 register architecture with three-state outputs and operates on bipolar logic. The device is housed in a 16-pin SOIC package and supports surface-mount installation. Electrical specifications include a propagation delay of 45 ns, a low-level output current of 8 mA, and a high-level output current of -2.6 mA. It functions within a supply voltage range of 4.75 V to 5.25 V and operates at temperatures between 0°C and +70°C.

Feature Summary

• Contains a 4-by-4 register file structure for data storage operations
• Provides three-state outputs for bus-driven applications
• Utilizes LS logic family characteristics for standard TTL compatibility

Applications

• Data storage in digital systems
• Bus interface circuits requiring tri-state control
• Register-based memory modules

Procurement Notes

Verify the specific suffix 'NS' against official Texas Instruments documentation to confirm the exact package variant and tape/reel configuration. Ensure the component meets RoHS requirements if applicable to your design constraints. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when a 4x4 register file with tri-state outputs is required in a system using LS logic levels. Consider the SOIC-16 package dimensions for PCB layout compatibility. Verify that the 45 ns propagation delay and 4.75V to 5.25V operating voltage align with the system's timing and power supply specifications.

Part Context

This component is part of the SN74LS670 family of register files produced by Texas Instruments. The LS series denotes Low-power Schottky logic, offering improved speed and power consumption compared to standard TTL. The SN74LS670NS specifically refers to the SOIC package version, distinguishing it from DIP or other package types within the same logical family.

Replacement Considerations

Check for SN74LS670N (PDIP) or SN74LS670D (SOIC) as potential physical replacements, ensuring pinout compatibility. Verify functional equivalence with other 4x4 register files from the 74LS series if sourcing directly from TI is not possible.