A

Y

9

SN54HC14, SN74HC14

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SCLS085I – DECEMBER 1982 – REVISED FEBRUARY 2016

Product Folder Links: SN54HC14 SN74HC14

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Copyright © 1982–2016, Texas Instruments Incorporated

9 Detailed Description

9.1 Overview

These Schmitt-trigger devices contain six independent inverters. They perform the Boolean function Y = A in

positive logic.

Schmitt-trigger inputs are designed to provide a minimum separation between positive and negative switching

thresholds. This allows for noisy or slow inputs that would cause problems such as oscillation or excessive

current draw with normal CMOS inputs.

9.2 Functional Block Diagram

Figure 4. Logic Diagram (Positive Logic)

9.3 Feature Description

The wide operating range of the device allows it to be used in a variety of systems that use different logic levels.

The outputs can drive up to 10 LSTTL loads each. The device has very low power consumption, with 20-

μA Max

9.4 Device Functional Modes

Table 1 lists the functional modes of the SNx4HC14.

Table 1. Function Table (Each Inverter)

INPUTS

A

OUTPUT

Y

H

L

L

H