MC74HCT157AN 데이터 시트보기 (PDF) - Motorola => Freescale

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MC74HCT157AN

Quad 2-Input Data Selector/Multiplexer with LSTTL-Compatible Inputs

Motorola => Freescale 

MC74HCT157A

EXPANDED LOGIC DIAGRAM

2

A0

3

B0

A1 5

NIBBLE

INPUTS

B1 6

11

A2

10

B2

14

A3

13

B3

OUTPUT ENABLE

SELECT

4 Y0

7

Y1

9 Y2

DATA

OUTPUTS

12 Y3

SWITCHING WAVEFORMS

INPUT A OR B

tPLH

OUTPUT Y

tr

2.7 V

1.3 V

0.3 V

90%

1.3 V

10%

tTLH

tf

3V

GND

tPHL

tTHL

Figure 1.

tr

SELECT

tPLH

OUTPUT Y

2.7 V

1.3 V

0.3 V

90%

1.3 V

10%

tTLH

Figure 2.

tf

3V

GND

tPHL

tTHL

tr

OUTPUT ENABLE

tPHL

OUTPUT Y

2.7 V

1.3 V

0.3 V

90%

1.3 V

10%

tTHL

Figure 3.

tf

VCC

GND

tPLH

tTLH

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

* Includes all probe and jig capacitance

Figure 4. Test Circuit

MOTOROLA

4

High–Speed CMOS Logic Data

DL129 — Rev 6

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