SN74HC251DG4

Overview

The SN74HC251DG4 is a data selector/multiplexer featuring full binary decoding to select one of eight data sources. It provides strobe-controlled complementary three-state outputs for direct system bus interfacing. The device operates within a wide voltage range of 2 V to 6 V and supports high-current outputs capable of driving up to 15 LSTTL loads. Typical propagation delay is 9 ns, with maximum supply current of 80 μA.

Feature Summary

• Features strobe-controlled complementary three-state outputs for efficient bus interfacing
• Provides full binary decoding to select one of eight independent data sources
• Supports parallel-to-serial conversion functions
• Operates across a wide supply voltage range from 2 V to 6 V

Applications

• Bus-oriented systems requiring data selection
• Parallel-to-serial data conversion circuits
• High-speed digital signal routing applications

Procurement Notes

Verify the specific package type matches the design requirements, as the SN74HC251 family includes SOIC, SSOP, PDIP, and TSSOP options. Confirm that the ordering suffix corresponds to the desired packaging format and lead finish specifications before finalizing procurement orders.

Selection Notes

Select this component when a standard HC logic multiplexer with three-state output capability is required. Ensure the operating temperature range aligns with the application environment, specifically noting the -40°C to 85°C rating for the SN74 series compared to the wider military grade options.

Part Context

This part belongs to the Texas Instruments SNx4HC251 family of data selectors. It serves as the three-state output variant of the SN74HC151 multiplexer. The device integrates full binary decoding logic to manage multiple input channels efficiently within standard CMOS logic families.

Replacement Considerations

SN74HC151DRG4