SN74LS348D

Overview

The SN74LS348D is an active production 8-line to 3-line priority encoder manufactured by Texas Instruments. It belongs to the LS logic series and features 3-state outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum clock frequency of 12 MHz. It utilizes a 16-pin SOIC package with a standard operating temperature range from 0°C to +70°C.

Feature Summary

• Encodes eight input lines into three binary output lines based on priority
• Provides 3-state outputs for bus-driven applications
• Compatible with standard TTL logic families

Applications

• Interrupt control systems
• Keyboard encoding circuits
• Multiplexed data routing

Procurement Notes

Verify that the specific orderable part number matches the required package type, as the SN74LS348D designation specifically indicates the SOIC variant. Confirm RoHS compliance status and lead finish details (NIPDAU) against current procurement specifications. Ensure the selected component meets the required moisture sensitivity level and peak reflow temperature ratings for your assembly process.

Selection Notes

Select this component when an 8-input priority encoding function with 3-state outputs is required in a surface-mount design. The LS logic family offers a balance of speed and power consumption suitable for general-purpose digital logic applications. Verify that the 16-pin SOIC footprint aligns with the printed circuit board layout constraints.

Part Context

This component is part of the broader SN74LS348 family produced by Texas Instruments. While the SN74LS348D denotes the surface-mount SOIC version, other variants such as the SN74LS348N are available in through-hole PDIP packages. All variants share identical logical functionality and electrical characteristics defined by the LS logic specification.

Replacement Considerations

Cross-reference with SN74LS348N for equivalent functionality in a different package format.