SN74LS348NSRE4

Overview

The SN74LS348NSRE4 is an octal-to-three-line priority encoder manufactured by Texas Instruments. It converts eight active-low input lines into a binary-coded output on three lines, prioritizing higher-order inputs. The device features three-state outputs for direct bus connection and includes a strobe input to disable encoding when inactive. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a standard operating temperature range from -40°C to 85°C.

Feature Summary

• Converts eight active-low data inputs into a three-bit binary code with priority assigned to higher-order inputs
• Provides three-state outputs compatible with system buses for efficient signal routing
• Includes a dedicated strobe input that disables the encoder outputs when activated

Applications

• Interrupt controller circuits requiring priority handling
• Data acquisition systems for address decoding
• Multiplexed input scanning in industrial control panels

Procurement Notes

Verify the package designation matches the required SOIC-16 footprint and confirm the suffix indicates lead-free composition. Ensure the specified temperature grade aligns with the operational environment requirements. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and current availability status before finalizing procurement orders.

Selection Notes

Select this component when an application requires converting multiple active-low signals into a compact binary representation with defined priority levels. It is suitable for designs needing bus-compatible outputs and a global enable function via the strobe pin. Consider alternative logic families if lower power consumption or different voltage compatibility is required.

Part Context

This part belongs to the Texas Instruments 74LS series of logic integrated circuits. The LS designation indicates Low-power Schottky technology, which offers improved speed-power product compared to standard TTL. The NSRE4 suffix identifies the specific surface-mount package variant and manufacturing compliance details.

Replacement Considerations

Compatible substitutes include the SN74LS348N for through-hole applications or other generic 74LS348 equivalents from different manufacturers, provided they maintain identical pinouts and electrical characteristics.