MC74HCT145ASD 데이터 시트보기 (PDF) - Motorola => Freescale

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MC74HCT145ASD

Octal 3-State Noninverting Bus Transceiver with LSTTL Compatible Inputs

Motorola => Freescale 

MC54/74HCT245A

tr

INPUT

A OR B

tPLH

OUTPUT

B OR A

2.7 V

1.3 V

0.3 V

90%

1.3 V

10%

tTLH

Figure 1.

SWITCHING WAVEFORMS

tf

3.0 V

GND

tPHL

tTHL

DIRECTION

OUTPUT

ENABLE

A OR B

A OR B

1.3 V

1.3 V

1.3 V

tPZL tPLZ

1.3 V

10%

tPZH tPHZ

90%

1.3 V

Figure 2.

3.0 V

GND

3.0 V

GND

HIGH

IMPEDANCE

VOL

VOH

HIGH

IMPEDANCE

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

* Includes all probe and jig capacitance

Figure 3.

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

1 kΩ

CL*

CONNECT TO VCC WHEN

TESTING tPLZ AND tPZL.

CONNECT TO GND WHEN

TESTING tPHZ AND tPZH.

* Includes all probe and jig capacitance

Figure 4. Test Circuit

MOTOROLA

3–4

High–Speed CMOS Logic Data

DL129 — Rev 6

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