74LVC14AD datasheet(6/10 Pages) PHILIPS

部品番号	74LVC14AD

部品情報	Hex inverting Schmitt-trigger with 5V tolerant input

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Philips Semiconductors

Product specification

74LVC14A

Hex inverting Schmitt-trigger with 5V

tolerant input

1998 Apr 28

6

AC CHARACTERISTICS

GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = –40_C to +85_C

LIMITS

SYMBOL

PARAMETER

WAVEFORM

VCC = 3.3V ±0.3V

VCC = 2.7V

VCC = 1.2V

UNIT

MIN

TYP1

MAX

MIN

TYP

MAX

TYP

tPHL/

tPLH

Propagation delay

nA to nY

Figure 1, 2

1.5

4.5

6.4

1.5

5.0

7.5

18

ns

NOTE:

1. These typical values are at VCC = 3.3V and Tamb = 25°C.

AC WAVEFORMS

VM = 1.5 V at VCC w 2.7 V

VM = 0.5 S VCC at VCC < 2.7 V

VOL and VOH are the typical output voltage drop that occur with the

output load.

VM

nA INPUT

nY OUTPUT

VM

tPLH

tPHL

GND

VI

VOL

VOH

SV00395

Figure 1. Input (nA) to output (nY) propagation delays.

TEST CIRCUIT

PULSE

GENERATOR

VI

RT

D.U.T.

VO

CL

50pF

S1

2 x VCC

Open

GND

500

Ω

500

Ω

VCC

VI

t 2.7V

VCC

2.7V – 3.6V

2.7V

Test

S1

GND

tPLZ/tPZL

2 x VCC

tPHZ/tPZH

tPLH/tPHL

Open

SY00003

VCC

Figure 2. Load circuitry for switching times.

APPLICATION INFORMATION

All values given are typical unless otherwise specified.

Note to Figure 7: f

+ 1

T

[

1

0.8

RC

0.5

1.0

1.5

2.0

average

ICC

(mA)

V CC(V)

1.8

2.1

2.4

1.5

3.3

3.0

2.7

3.6

negative-going

edge

positive-going

edge

SV00445

Figure 3. Average ICC for LVC Schmitt-trigger devices;

linear change of Vi between 0.8 V to 2.0 V.

SV00433

R

C

Figure 4. Relaxation oscillator using the LVC14.

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