SN74HC148ANSR

Overview

The SN74HC148ANSR is an 8-line-to-3-line priority encoder manufactured by Texas Instruments, belonging to the HC logic family. It converts eight active-low inputs into a three-bit binary code with active-low outputs. The device features active-low enable input and active-low enable output for expansion. It operates within a supply voltage range of 2 V to 6 V and supports surface-mount installation in a 16-pin SOIC package. The component exhibits a propagation delay of 16 ns and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Converts eight active-low data inputs into a corresponding three-bit binary encoded output
• Provides active-low enable input and active-low enable output to facilitate cascading multiple units
• Implements priority encoding where higher-order inputs take precedence over lower-order ones

Applications

• Interrupt controller circuits requiring prioritized signal handling
• Keyboard encoding systems for microprocessor interfaces
• Data multiplexing applications involving address selection

Procurement Notes

Verify the specific suffix ANSR against the manufacturer datasheet to confirm the SOIC-16 package and reel packaging configuration. Ensure compatibility with the target system's voltage levels and temperature requirements before integration. Cross-reference the ordering information with official Texas Instruments documentation to validate RoHS compliance and lead time specifications.

Selection Notes

Select this component when an 8-input priority encoding function is required within the HC logic family constraints. Consider the 2 V to 6 V operating range and 16 ns propagation delay for timing analysis. Verify that the 16-pin SOIC package fits the available board space and that the active-low logic polarity matches the system design requirements.

Part Context

This part belongs to the SN74HC series of high-speed CMOS logic devices produced by Texas Instruments. The HC series offers wide operating voltage ranges and compatibility with standard CMOS logic levels. The SN74HC148 specifically addresses the need for efficient binary encoding in digital systems, serving as a fundamental building block for data routing and control logic applications.

Replacement Considerations

SN74HC148NSR is a verified substitute offering identical functionality in a similar SOIC package format.