74LV251N,112

Signal Switches, Multiplexers, Decoders Overview

The NXP USA Inc. 74LV251N,112 is an 8-input multiplexer with 3-State outputs housed in a 16-pin Plastic DIL package. It features true and complement outputs for expansion. The device operates within a supply voltage range of 1.0 V to 3.6 V and accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V. Typical propagation delays from input to output are 14 ns at 3.3 V with 15 pF load capacitance. Input capacitance is typically 3.5 pF.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides eight binary inputs selectable via three address lines to route data to true and complement outputs.
• Features 3-State outputs controlled by an active-low enable input to facilitate bus expansion.
• Optimized for low-voltage applications with compatibility to TTL logic levels at specific supply voltages.

Signal Switches, Multiplexers, Decoders Applications

• Data routing in digital systems
• Multiplexing multiple signal sources to a single destination
• Universal function generation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the component status as this part number may be obsolete or discontinued. Confirm availability through authorized distributors and check for valid RoHS compliance documentation. Ensure the 16-pin DIP package matches the design requirements before procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-to-1 multiplexer with complementary outputs is required. It is suitable for low-voltage designs operating down to 1.0 V. Verify that the 16-pin DIP package fits the PCB layout constraints and that the standard output drive capability meets the load requirements.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74LV series of low-voltage CMOS logic ICs. It is pin and function compatible with the 74HC/HCT251 variants, allowing for potential interchangeability in designs originally specified for those families while offering optimized performance for lower voltage operation.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct replacements such as the 74LV251D (SO package) or 74LV251PW (TSSOP package) if package form factor changes are acceptable. Verify functional equivalence with other 8-input multiplexers from different manufacturers if the NXP part is unavailable.

Signal Switches, Multiplexers, Decoders FAQ

What is the function of the OE pin?

The OE (Output Enable) pin controls the 3-State condition of the outputs. When OE is HIGH, both Y and Y outputs enter a high impedance OFF-state.

Does the 74LV251 support TTL input levels?

Yes, it accepts TTL input levels when the supply voltage (VCC) is between 2.7 V and 3.6 V.