74LCX245 데이터 시트보기 (PDF) - Fairchild Semiconductor

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74LCX245

Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

AC LOADING and WAVEFORMS Generic for LCX Family

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

Test

tPLH, tPHL

tPZL, tPLZ

tPZH, tPHZ

Switch

Open

6V at VCC 3.3V r 0.3V

VCC x 2 at VCC 2.5V r 0.2V

GND

Waveform for Inverting and Non-Inverting Functions

3-STATE Output High Enable and

Disable Times for Logic

Propagation Delay. Pulse Width and trec Waveforms

Setup Time, Hold Time and Recovery Time for Logic

3-STATE Output Low Enable and

Disable Times for Logic

trise and tfall

FIGURE 2. Waveforms

(Input Characteristics; f =1MHz, tr = tf = 3ns)

Symbol

Vmi

Vmo

Vx

Vy

3.3V r 0.3V

1.5V

1.5V

VOL  0.3V

VOH  0.3V

VCC

2.7V

1.5V

1.5V

VOL  0.3V

VOH  0.3V

2.5V r 0.2V

VCC/2

VCC/2

VOL  0.15V

VOH  0.15V

5

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