SN74HC148DR

Overview

The SN74HC148DR is an active production 8-line to 3-line priority encoder manufactured by Texas Instruments in a 16-pin SOIC package. It operates on a single power supply ranging from 2V to 6V and supports a commercial temperature range of -40°C to 85°C. The device encodes eight data lines into 3-line binary (octal) format with active-low inputs and outputs. Key electrical specifications include a maximum supply current of 80μA, typical propagation delay of 16ns, and output drive capabilities of ±4mA at 5V.

Feature Summary

• Encodes eight data lines to 3-line binary (octal) format
• Features enable input (EI) and enable output (EO) signals for cascading multiple stages without external circuitry
• Outputs can drive up to 10 LSTTL loads

Applications

• N-bit encoding
• Code converters and generators

Procurement Notes

Verify the specific ordering suffix 'DR' corresponds to the SOIC-16 package and tape-and-reel quantity of 2500 units. Confirm that the RoHS status is compliant and lead finish is NIPDAU. Ensure the moisture sensitivity level rating matches your assembly process requirements.

Selection Notes

Select this component when an 8-input priority encoder is required within the HC logic family. Verify that the operating voltage range of 2V to 6V aligns with the system design. Consider the -40°C to 85°C temperature range for environmental suitability.

Part Context

This part belongs to the SNx4HC148 series of 8-Line to 3-Line Priority Encoders. It is a standard catalog product designed for general-purpose digital logic applications requiring octal encoding functionality.

Replacement Considerations

SN74HC148DRE4 and SN74HC148DRG4 are direct replacements offering identical functionality and packaging.