74HC147 datasheet(2/23 Pages) PHILIPS

2 / 23 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Hex inverting Schmitt trigger

74HC14; 74HCT14

FEATURES

• Applications:

– Wave and pulse shapers

– Astable multivibrators

– Monostable multivibrators.

• Complies with JEDEC standard no. 7A

• ESD protection:

HBM EIA/JESD22-A114-A exceeds 2000 V

MM EIA/JESD22-A115-A exceeds 200 V.

• Specified from −40 to +85 °C and −40 to +125 °C.

DESCRIPTION

The 74HC14 and 74HCT14 are high-speed Si-gate CMOS

devices and are pin compatible with low power Schottky

TTL (LSTTL). They are specified in compliance with

JEDEC standard no. 7A.

The 74HC14 and 74HCT14 provide six inverting buffers

with Schmitt-trigger action. They are capable of

transforming slowly changing input signals into sharply

defined, jitter-free output signals.

QUICK REFERENCE DATA

GND = 0 V; Tamb =25 °C; tr = tf = 6 ns

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD =CPD × VCC2 × fi × N+ Σ(CL × VCC2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in Volts;

N = total load switching outputs;

Σ(CL × VCC2 × fo) = sum of the outputs.

2. For type 74HC14 the condition is VI = GND to VCC.

For type 74HCT14 the condition is VI = GND to VCC − 1.5 V.

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

HCT

tPHL/tPLH

propagation delay nA to nY

CL = 15 pF; VCC = 5 V 1217ns

input capacitance

3.5

CPD

power dissipation capacitance per gate notes 1 and 2

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