74LVC245A 查看數據表（PDF） - ON Semiconductor

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74LVC245A

Low-Voltage CMOS Octal Transceiver

ON Semiconductor 

74LVC245A

An, Bn

Bn, An

Vmi

tPLH

Vmo

Vmi

tPHL

Vmo

VCC

0V

VOH

VOL

WAVEFORM 1 − PROPAGATION DELAYS

tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns

OE, T/R

Vmi

Vmi

tPZH

An, Bn

tPHZ

Vmo

VCC

0V

VOH

VHZ

tPZL

tPLZ

An, Bn

Vmo

VLZ

VOL

WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES

tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns

Figure 3. AC Waveforms

Symbol

VI

Vmi

Vmo

VHZ

VLZ

1.2 V

VCC

VCC/2

VCC/2

VOL + 0.15 V

VOH − 0.15 V

1.8 V + 0.15 V

VCC

VCC/2

VCC/2

VOL + 0.15 V

VOH − 0.15 V

VCC

2.5 V + 0.2 V

VCC

VCC/2

VCC/2

VOL + 0.15 V

VOH − 0.15 V

2.7 V

2.7 V

1.5 V

1.5 V

VOL + 0.3 V

VOH − 0.3 V

3.3 V + 0.3 V

2.7 V

1.5 V

1.5 V

VOL + 0.3 V

VOH − 0.3 V

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