HD74LVC244A データシートの表示（PDF） - Renesas Electronics

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HD74LVC244A

Octal Buffers / Line Drivers with 3-state Outputs

Renesas Electronics 

HD74LVC244A

Waveforms – 1

Input A

10 %

tr

90 %

Vref

tPLH

tf

90 %

Vref

10 %

tPHL

Output Y

Vref

Vref

Notes: 1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveform : PRR = 10 MHz, duty cycle 50%

VIH

GND

VOH

VOL

Waveforms – 2

Input G

tf

90 %

Vref

10 %

Waveform - A

Waveform - B

tZL

Vref

tZH

Vref

tr

90 %

Vref

10 %

tLZ

tHZ

VOL + 0.3 V

VOH – 0.3 V

VIH

GND

≈VOH1

VOL

VOH

≈VOL1

TEST

VIH

Vref

VOH1

VOL1

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

2.7 V

Vcc

1.5 V 50%Vcc

3V

Vcc

GND

GND

Notes:

1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveform : PRR = 10 MHz, duty cycle 50%

3. Waveform – A shows input conditions such that the output is "L" level when enable by the

output control.

4. Waveform – B shows input conditions such that the output is "H" level when enable by the

output control.

Rev.4.00 Jul. 27, 2004 page 5 of 6

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