SN74HC257NG4

Overview

The SN74HC257NG4 is a high-speed CMOS logic device containing four independent 2-line to 1-line data selectors or multiplexers with non-inverting three-state outputs. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to +85°C. The device features low input current (maximum 1 µA) and typical propagation delays of 9 ns at 5 V with a 50 pF load. It provides bus interface capabilities from multiple sources in high-performance systems.

Feature Summary

• Contains four independent 2-to-1 data selectors/multiplexers with shared address select inputs
• Features non-inverting three-state outputs controlled by an active-low strobe input
• High-current outputs capable of driving up to 15 LSTTL loads
• Low power consumption with maximum ICC of 80 µA

Applications

• Bus interface from multiple sources in high-performance systems
• Data selection and routing applications
• Multiplexing signals from 4-bit data sources to 4-output data lines

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's latest documentation to confirm compliance status, lead finish material, and environmental certifications. Ensure the package type matches the required PCB footprint and that the operating temperature range meets system requirements.

Selection Notes

Select this component for designs requiring quad 2-to-1 multiplexing with three-state output control. Consider the HC series speed and voltage compatibility when interfacing with other logic families. Verify that unused inputs are tied to defined logic levels to prevent undefined operational states.

Part Context

This part belongs to the SNx4HC257 family of quadruple 2-line to 1-line data selectors/multiplexers. It is functionally similar to the SN74HC258 but provides non-inverted outputs instead of inverted ones. The device is part of Texas Instruments' standard catalog line of high-speed CMOS logic products.

Replacement Considerations

SN74HC258N offers identical functionality with inverted outputs. SN74HC257DR provides the same logic function in a SOIC package.