SN74HC251PWRG4

Overview

The SN74HC251PWRG4 is a data selector/multiplexer with 3-state outputs, manufactured by Texas Instruments. It features full binary decoding to select one of eight data sources and provides strobe-controlled complementary outputs. The device operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to 85°C. It utilizes a TSSOP-16 package.

Feature Summary

• Provides full binary decoding to select one of eight data sources
• Features strobe-controlled complementary 3-state outputs for bus interfacing
• Supports parallel-to-serial conversion functions

Applications

• Bus-organized system data line driving
• Parallel-to-serial data conversion
• Data routing in digital logic systems

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's current product folder to confirm active production status and RoHS compliance details. Ensure the TSSOP-16 package dimensions match the design requirements. Check for any recent documentation updates or revision history changes that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a single-channel 8-input multiplexer with high-impedance state control is required. It serves as the 3-state version of the standard HC151 device. Consider the wide operating voltage range and low power consumption characteristics suitable for general-purpose CMOS applications requiring direct interface with system buses.

Part Context

This part belongs to the SNx4HC251 family of data selectors/multiplexers produced by Texas Instruments. It is categorized under the HC logic series, designed for high-speed CMOS operations. The device is functionally equivalent to other variants in the family but is specifically packaged in the TSSOP format for surface-mount assembly.

Replacement Considerations

SN74HC251PWR

FAQ

How are the outputs controlled?

The outputs are controlled by the output-enable (OE) input. When OE is high, the outputs are disabled (high-impedance state). When OE is low, the selected data input is passed to the outputs.

What happens if inputs are left floating?

Unused inputs must not be left floating. They should be connected to either VCC or GND to prevent undefined operational states and excessive power consumption.