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MC74HCT374A

Octal 3−State Noninverting D Flip−Flop with LSTTL−Compatible Inputs

Motorola => Freescale 

MC54/74HCT374A

CLOCK

Q

tr

tf

2.7 V

1.3 V

0.3 V

tw

1/fmax

tPLH

tPHL

90%

1.3 V

10%

tTLH

tTHL

Figure 1.

SWITCHING WAVEFORMS

VCC

OUTPUT

1.3 V

ENABLE

GND

tPZL tPLZ

Q

1.3 V

tPZH tPHZ

Q

1.3 V

Figure 2.

3V

GND

HIGH

IMPEDANCE

10% VOL

90% VOH

HIGH

IMPEDANCE

VALID

DATA

3V

1.3 V

GND

tsu

th

CLOCK

3V

1.3 V

GND

Figure 3.

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

TEST CIRCUITS

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.

* Includes all probe and jig capacitance

Figure 5.

CLOCK 11

OUTPUT 1

ENABLE

EXPANDED LOGIC DIAGRAM

D0

3

DQ

D1

4

DQ

D2

7

DQ

D3

8

DQ

D4

13

DQ

D5

14

DQ

D6

17

DQ

D7

18

DQ

C

C

C

C

C

C

C

C

2

5

6

9

12

15

16

19

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

MOTOROLA

4

High–Speed CMOS Logic Data

DL129 — Rev 6

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