CD74HC374E datasheet(8/8 Pages) TI

Part #	CD74HC374E

Description	High-Speed CMOS Logic Octal D-Type Flip-Flop, 3-State Positive-Edge Triggered

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Manufacturer	TI [Texas Instruments]

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FIGURE 7. HC THREE-STATE PROPAGATION DELAY

WAVEFORM

FIGURE 8. HCT THREE-STATE PROPAGATION DELAY

WAVEFORM

NOTE:

Open drain waveforms tPLZ and tPZL are the same as those for three-state shown on the left. The test circuit is Output RL =1kΩ to

VCC, CL = 50pF.

FIGURE 9. HC AND HCT THREE-STATE PROPAGATION DELAY TEST CIRCUIT

Test Circuits and Waveforms (Continued)

50%

10%

90%

GND

VCC

10%

90%

50%

OUTPUT

DISABLE

OUTPUT LOW

TO OFF

OUTPUT HIGH

TO OFF

OUTPUTS

ENABLED

OUTPUTS

DISABLED

OUTPUTS

ENABLED

6ns

tPZH

tPHZ

tPZL

tPLZ

0.3

2.7

GND

3V

10%

90%

1.3V

OUTPUT

DISABLE

OUTPUT LOW

TO OFF

OUTPUT HIGH

TO OFF

OUTPUTS

ENABLED

OUTPUTS

DISABLED

OUTPUTS

ENABLED

tr

6ns

tPZH

tPHZ

tPZL

tPLZ

6ns

tf

1.3

IC WITH

THREE-

STATE

OUTPUT

OTHER

INPUTS

TIED HIGH

OR LOW

OUTPUT

DISABLE

VCC FOR tPLZ AND tPZL

GND FOR tPHZ AND tPZH

OUTPUT

RL = 1kΩ

CL

50pF

CD54/74HC374, CD54/74HCT374, CD54/74HC574, CD54/74HCT574

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