SN74LVC14APW Hex Schmitt-Trigger Inverter

ElecSuppliers Part Number GuideAug 21, 2026

The SN74LVC14APW is a six-channel Schmitt-trigger inverter from Texas Instruments designed for high-speed digital signal conditioning. It combines six independent inverting logic gates with Schmitt-trigger inputs, allowing slowly changing or noisy input signals to be converted into clean digital transitions.

The device belongs to the 74LVC logic family, which is designed for low-voltage operation while providing compatibility with a broad range of digital systems.

The complete SN74LVC14APW Part Number identifies the specific device, package and temperature grade, making the full ordering code important for PCB replacement and component sourcing.

SN74LVC14APW Core Specifications

The SN74LVC14APW contains six independent Schmitt-trigger inverters.

The device operates from a supply voltage of approximately 1.65V to 5.5V.

Its inputs are designed to tolerate voltages up to 5.5V, subject to the specified operating conditions.

The outputs are CMOS logic outputs suitable for driving other digital logic devices.

The PW package designation identifies the 14-pin TSSOP package, providing six inverter channels in a compact surface-mount footprint.

SN74LVC14APW Schmitt-Trigger Input

The most important feature of the SN74LVC14APW is its Schmitt-trigger input.

A conventional CMOS inverter has a relatively narrow transition region. If its input voltage changes slowly or contains noise around the switching threshold, the output can potentially transition multiple times.

A Schmitt-trigger input introduces hysteresis between the positive-going and negative-going switching thresholds.

The input therefore uses different threshold levels depending on whether the signal is rising or falling.

This helps prevent unwanted switching when the input signal contains noise or changes slowly.

SN74LVC14APW Signal Conditioning

The Schmitt-trigger architecture makes the device useful for cleaning up signals generated by sensors, switches and other circuits that do not produce ideal digital edges.

For example, a mechanical switch can generate contact bounce during operation.

A properly designed SN74LVC14APW circuit can help transform the resulting changing voltage into a more stable digital signal for a microcontroller or FPGA.

The same principle applies to slowly changing analog signals that cross the logic threshold.

The SN74LVC14APW should not, however, be treated as an analog comparator. Its purpose is digital threshold switching with hysteresis.

SN74LVC14APW Inverting Logic

Each channel performs a logical inversion.

When the input is recognized as a logic LOW, the output is driven HIGH.

When the input transitions sufficiently above the positive-going threshold, the output switches LOW.

The six independent channels can therefore be used individually or combined to implement more complex logic functions.

Unused channels should be handled according to the manufacturer's recommended input configuration rather than leaving CMOS inputs floating.

SN74LVC14APW 5.5V-Tolerant Inputs

One useful characteristic of the 74LVC14 family is the ability of its inputs to tolerate signals up to 5.5V under the specified conditions.

This can simplify interfacing between lower-voltage logic and signals originating from higher-voltage circuits.

For example, a system operating from a 3.3V supply may need to monitor a 5V logic signal.

The input tolerance can make this type of interface easier.

Input tolerance does not mean that every pin can be driven to 5.5V under every power condition. The absolute maximum ratings and power-off input behavior must be considered for the actual circuit.

SN74LVC14APW Supply Voltage

The SN74LVC14APW is designed for operation across a broad low-voltage supply range.

The specified operating range extends from 1.65V to 5.5V.

This allows the same basic logic device to be used in systems operating at common supply levels such as 1.8V, 2.5V, 3.3V and 5V.

The supply voltage also affects the logic thresholds and output characteristics.

Therefore, the circuit designer should evaluate the device using the actual VCC level rather than assuming that all LVC logic behaves identically at different supply voltages.

SN74LVC14APW Propagation Delay

The SN74LVC14 family is designed for relatively fast CMOS logic operation.

Propagation delay depends on the supply voltage, ambient temperature and output load.

Higher capacitive loads generally require more time for the output to transition.

For timing-critical circuits, the propagation delay should therefore be included in the overall timing budget.

For simple signal conditioning, switch debouncing and low-frequency control signals, the device's speed is normally more than sufficient.

SN74LVC14APW Output Drive

The CMOS outputs can source and sink current to drive downstream logic.

The actual output current capability depends on supply voltage and specified output voltage conditions.

When several gates are switching simultaneously, the total transient current through the power and ground network can increase.

Good supply bypassing close to the device helps reduce voltage disturbances caused by these switching currents.

The output should also be kept within the specified current and capacitive-load limits.

SN74LVC14APW Package

The SN74LVC14APW uses a 14-pin TSSOP package.

The package contains six inverter channels plus the required power connections.

The TSSOP footprint is substantially smaller than a traditional through-hole DIP package, making it suitable for modern compact PCB layouts.

When replacing another 74LVC14 device, the package suffix should be checked because different suffixes can represent different package configurations.

A functionally similar device in another package is not necessarily a drop-in PCB replacement.

SN74LVC14APW Applications

The SN74LVC14APW can be used in a variety of digital signal-conditioning applications.

Typical applications include:

Switch debouncing

Slow input signal conversion

Waveform shaping

Noise filtering

Clock signal conditioning

Sensor interface circuits

Digital control systems

Logic-level conversion

Oscillator and timing circuits

The six independent channels allow several signals to be conditioned using one compact IC.

SN74LVC14APW Switch Debouncing

Mechanical switches rarely produce a single clean electrical transition.

When the contacts open or close, the electrical signal can oscillate briefly before reaching a stable state.

A Schmitt-trigger input can help prevent these intermediate voltage changes from repeatedly crossing the logic threshold.

For more demanding debounce requirements, an RC network can be placed ahead of the SN74LVC14APW.

The RC network slows the voltage transition while the Schmitt-trigger hysteresis provides a defined switching response.

This combination is commonly used for simple hardware debounce circuits.

SN74LVC14APW Clock Conditioning

Clock signals benefit from clean transitions.

If a clock waveform contains excessive noise or slow edges, downstream CMOS logic may experience unreliable switching.

A Schmitt-trigger inverter can reshape suitable clock signals into cleaner digital transitions.

However, the SN74LVC14APW should only be used when its propagation delay, hysteresis and input/output voltage requirements are compatible with the clock frequency.

For high-speed clock distribution, a dedicated clock buffer may be more appropriate.

SN74LVC14APW Oscillator Circuits

The Schmitt-trigger inverter can also participate in simple RC oscillator circuits.

An external resistor and capacitor can establish a timing network around one of the inverter channels.

As the capacitor voltage charges and discharges between the Schmitt-trigger thresholds, the inverter output changes state and produces an oscillating waveform.

The exact oscillation frequency depends on the resistor, capacitor, supply voltage and actual threshold characteristics.

This type of circuit is useful for simple timing or test functions but should not be confused with a precision oscillator.

SN74LVC14APW Sensor Interface

Some sensors produce slowly varying voltage signals rather than clean CMOS transitions.

When the signal is intended to represent a threshold condition rather than a precise analog measurement, an SN74LVC14APW input can be used as a digital threshold stage.

The Schmitt-trigger hysteresis helps prevent rapid output switching when the sensor voltage is close to the threshold.

For applications requiring accurate or programmable threshold levels, a dedicated comparator is generally more appropriate.

SN74LVC14APW Logic-Level Interface

The device can be useful when interfacing signals between different logic voltage environments.

Because the inputs can tolerate up to 5.5V under specified conditions, a lower-voltage system can monitor certain higher-voltage digital signals without requiring a separate high-voltage logic supply.

The output logic level is determined by the SN74LVC14APW's VCC supply.

This makes the device useful as a signal-conditioning stage between a higher-voltage input and lower-voltage digital logic.

The exact input and output voltage margins should always be checked for the connected devices.

SN74LVC14APW Replacement Considerations

A replacement for SN74LVC14APW should be evaluated using the complete electrical and mechanical specification.

Important parameters include:

Six Schmitt-trigger inverter channels.

Supply voltage range.

Input voltage tolerance.

Input switching thresholds.

Hysteresis.

Propagation delay.

Output drive capability.

Package.

Pin configuration.

A standard 74HC14 may appear similar because it also contains six Schmitt-trigger inverters, but its electrical characteristics and supply range are different.

It should not automatically be considered a direct replacement for SN74LVC14APW.

SN74LVC14APW vs 74HC14

Both the SN74LVC14APW and traditional 74HC14 devices contain six Schmitt-trigger inverters.

The difference lies in their logic-family characteristics.

LVC logic is designed for lower-voltage operation and provides useful input-voltage tolerance features.

74HC logic is based on a different CMOS architecture with different supply and input specifications.

Therefore, when replacing an SN74LVC14APW with a 74HC14, the designer must verify the supply voltage, logic thresholds, input tolerance and output behavior.

Pin compatibility alone is not enough.

SN74LVC14APW Component Sourcing

The complete SN74LVC14APW Part Number should be used when sourcing this component.

The SN74LVC14A portion identifies the six-channel Schmitt-trigger inverter, while the PW suffix identifies the TSSOP package configuration.

For automated assembly, the corresponding reel packaging code may be used depending on the procurement requirement.

When replacing an existing component, the package, temperature grade and electrical characteristics should be checked against the original BOM.

SN74LVC14APW in Compact Digital Systems

The SN74LVC14APW combines six Schmitt-trigger inverters, wide low-voltage supply operation and 5.5V-tolerant inputs in a compact 14-pin TSSOP package.

Its main advantage is not simply the presence of six inverters. The Schmitt-trigger architecture makes the device particularly useful for turning noisy or slowly changing signals into reliable digital transitions.

For switch inputs, waveform shaping, sensor threshold interfaces, timing circuits and logic-level conditioning, the SN74LVC14APW provides a compact six-channel solution.

For replacement applications, the full Part Number should be matched because the LVC logic family, Schmitt-trigger characteristics and PW TSSOP package all affect compatibility.