74LCX138MX 查看數據表（PDF） - Fairchild Semiconductor

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74LCX138MX

Low Voltage 1-of-8 Decoder/Demultiplexer with 5V Tolerant Inputs

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 ± 0.3V

VCC x 2 at VCC = 2.5V ± 0.2V

GND

Waveform for Inverting and Non-Inverting Functions

3-STATE Output Low 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 High Enable and

Disable Times for Logic

trise and tfall

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

FIGURE 2. Waveforms

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

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