SN74LS670NSR

Overview

The SN74LS670NSR is a register file integrated circuit manufactured by Texas Instruments, belonging to the 74LS logic series. It features a 4-by-4 register architecture with tri-state outputs and is housed in a 16-pin SOIC package. The device operates on a single power supply ranging from 4.75 V to 5.25 V. Key electrical parameters 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 supports surface-mount installation and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Contains a 4-by-4 register file structure for data storage operations
• Provides tri-state outputs to facilitate bus-driven system architectures
• Utilizes bipolar LS logic technology for standard digital interfacing

Applications

• Data storage modules requiring parallel input/output handling
• Bus interface circuits utilizing tri-state control mechanisms
• Digital systems employing 4-bit word processing architectures

Procurement Notes

Verify that the component matches the specific SN74LS670NSR designation to ensure correct packaging and logic family compatibility. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Validate pinout alignment with the 16-SOIC footprint during schematic capture. Ensure voltage supply constraints remain within the specified 4.75 V to 5.25 V operational limits for reliable performance.

Selection Notes

Select this component when a dedicated 4-by-4 register file with tri-state capability is required within a 74LS logic environment. Consider the 45 ns propagation delay and 16-SOIC package dimensions for board layout planning. Evaluate thermal requirements against the 0°C to +70°C operating range. Compare against other register files if higher speed or different I/O configurations are necessary for the target application.

Part Context

This part belongs to the SN74LS670 family of register files produced by Texas Instruments. It shares functional similarities with variants such as the SN74LS670N, differing primarily in packaging format. The SN74LS670NSR specifically denotes the surface-mount SOIC version, distinguishing it from through-hole DIP alternatives within the same logical series.

Replacement Considerations

The SN74LS670N serves as a direct pin-compatible alternative offering identical functionality in a PDIP package. Verify package dimension differences and mounting requirements before substituting. No other cross-family replacements are confirmed in available documentation.