MC54HC245A 查看數據表（PDF） - Motorola => Freescale

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MC54HC245A

Octal 3-State Noninverting Bus Transceiver

Motorola => Freescale 

MC54/74HC245A

SWITCHING WAVEFORMS

tr

INPUT

A OR B

tPLH

OUTPUT

B OR A

90%

50%

10%

90%

50%

10%

tTLH

Figure 1.

tf

VCC

GND

tPHL

tTHL

DIRECTION

OUTPUT

ENABLE

A OR B

A OR B

50%

50%

tPZL tPLZ

50%

10%

tPZH tPHZ

90%

50%

Figure 2.

VCC

GND

VCC

GND

HIGH

IMPEDANCE

VOL

VOH

HIGH

IMPEDANCE

TEST CIRCUITS

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

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 3.

* Includes all probe and jig capacitance

Figure 4.

MOTOROLA

4

High–Speed CMOS Logic Data

DL129 — Rev 6

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