TC74LCX240F 查看數據表（PDF） - Toshiba

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TC74LCX240F

Low-Voltage Octal Bus Buffer (inverted) with 5-V Tolerant Inputs and Outputs

Toshiba 

AC Waveform

Input

(A)

Output

(Y )

TC74LCX240F/FT/FK

tf

tr

90%

VIM

10%

tpLH

VOM

tpHL

Figure 2 tpLH, tpHL

VIH

GND

VOH

VOL

Output Enable

( OE )

Output ( Y )

Low to Off to Low

Output ( Y )

High to Off to High

tr

tpLZ

tf

90%

VIM

10%

tpZL

VX

tpHZ

VY

tpZH

Outputs

enabled

Outputs

disabled

VOM

VOM

Outputs

enabled

VIH

GND

VOH

VOL

VOH

GND

Figure 3 tpLZ, tpHZ, tpZL, tpZH

Symbol

Input

Output

Load

VIH

VIM

tr,tf

VOM

VX

VY

CL

RL

3.3 ± 0.3 V

2.7V

2.7V

1.5V

2.5ns

1.5V

VOL +0.3V

VOH -0.3V

50pF

500Ω

VCC

2.5 ± 0.2 V

VCC

VCC/2

2.0ns

VOH/2

VOL +0.15V

VOH -0.15V

30pF

500Ω

1.8 ± 0.15 V

VCC

VCC/2

2.0ns

VOH/2

VOL +0.15V

VOH -0.15V

30pF

1kΩ

7

2010-01-31

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