74LV251PW,112

Signal Switches, Multiplexers, Decoders Overview

The NXP USA Inc. 74LV251PW,112 is an 8-input multiplexer with 3-State outputs housed in a 16-pin TSSOP package. It operates within a supply voltage range of 1.0 V to 3.6 V and accepts TTL input levels between 2.7 V and 3.6 V. The device features true and complement outputs, both capable of high-impedance states for expansion. Typical propagation delays from inputs to outputs are 14 ns at 3.3 V with 15 pF load capacitance. Input capacitance is typically 3.5 pF, and power dissipation capacitance is 44 pF.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides eight binary inputs routed to complementary outputs based on three select lines
• Features 3-State outputs that enter high impedance when the enable input is HIGH
• Optimized for low-voltage applications with standard output capability
• Includes clamp diodes on inputs to allow interfacing with voltages exceeding VCC

Signal Switches, Multiplexers, Decoders Applications

• Multiplexing multiple data lines into a single transmission path
• Expanding multiplexer capacity by tying outputs together
• Routing signals in digital logic systems requiring low-voltage operation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74LV251 family includes DIL, SO, SSOP, and TSSOP variants. Confirm temperature range requirements against the -40°C to +125°C specification. Ensure supply voltage constraints align with the 1.0 V to 3.6 V operating limits before procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-to-1 multiplexer with tri-state outputs is required in a low-voltage environment. It is functionally compatible with 74HC/HCT251 devices but optimized for lower supply voltages down to 1.0 V. Consider the TSSOP package dimensions if space-constrained surface mount assembly is necessary.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74LV series of low-voltage CMOS logic integrated circuits manufactured by Philips Semiconductors (now NXP). The 74LV251 specifically implements an 8-input multiplexer architecture. It supersedes earlier data specifications from April 1997 and was published as a product specification in May 1998.

Signal Switches, Multiplexers, Decoders Replacement Considerations

• 74LV251D
• 74LV251DB
• 74LV251N

Signal Switches, Multiplexers, Decoders FAQ

How does the Output Enable (OE) pin control the 3-State functionality?

When the OE input is HIGH, both the Y and Y outputs enter a high impedance OFF-state. When OE is LOW, the selected input is routed to the outputs.

Can this device interface with higher voltage inputs?

Yes, the inputs include clamp diodes which permit the use of current limiting resistors to interface inputs to voltages in excess of VCC.