74LCX540(2006) 데이터 시트보기 (PDF) - Fairchild Semiconductor

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74LCX540
(Rev.:2006)

Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

AC Loading and Waveforms (Generic for LCX Family)

TEST

SIGNAL

VCC

DUT

500Ω

CL

500Ω

OPEN

GND

VI

tPLH, tPHL

tPZH, tPHZ

tPZL, tPLZ

Figure 1. AC Test Circuit (CL includes probe and jig capacitance)

Test

tPLH, tPHL

tPZL, tPLZ

tPZH, tPHZ

Switch

Open

6V at VCC = 3.3 ± 0.3V

VCC x 2 at VCC = 2.5 ± 0.2V

GND

DATA

IN

tpxx

DATA

OUT

Vmi

tpxx

VCC

GND

Vmo

Waveform for Inverting and

Non-Inverting Functions

CONTROL

IN

CLOCK

OUTPUT

tW

tPHL

Vmo

Vmi

trec

VCC

GND

Vmi

tPLH

Vmo

Propagation Delay, Pulse Width and

trec Waveforms

OUTPUT

CONTROL

tPZL

DATA

OUT

Vmi

tPLZ

Vmo

VCC

GND

VX

VOL

3-STATE Output Low Enable and

Disable Times for Logic

OUTPUT

CONTROL

DATA

OUT

tPZH

Vmi

tPHZ

Vmo

VCC

GND

VOH

VY

3-STATE Output High Enable and

Disable Times for Logic

DATA

IN

CONTROL

INPUT

MR

OR

CLEAR

tS

tS trec

Vmi VCC

GND

tH

VCC

Vmi

GND

Vmi

Setup Time, Hold Time and

Recovery Time for Logic

tr

tf

ANY

OUTPUT

90%

10%

90%

10%

VOH

VOL

trise and tfall

Figure 2. Waveforms (Input Characteristics; f = 1MHz, tr = tf = 3ns)

Symbol 3.3V ± 0.3V

VCC

2.7V

2.5V ± 0.2V

Vmi

1.5V

1.5V

VCC / 2

Vmo

1.5V

1.5V

VCC / 2

Vx

VOL + 0.3V

VOL + 0.3V

VOL + 0.15V

Vy

VOH − 0.3V

VOH − 0.3V

VOH − 0.15V

6

74LCX540 Rev. 1.0.0

www.fairchildsemi.com

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