CD74HC670 datasheet(8/17 Pages) TAOS

Part #	CD74HC670

Description	High-Speed CMOS Logic 4x4 Register File

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

Direct Link	http://www.taosinc.com

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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

10%

90%

1.3V

OUTPUT

DISABLE

OUTPUT LOW

TO OFF

OUTPUT HIGH

TO OFF

OUTPUTS

ENABLED

OUTPUTS

DISABLED

OUTPUTS

ENABLED

6ns

tPZH

tPHZ

tPZL

tPLZ

6ns

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

50pF

CD54HC670, CD74HC670, CD74HCT670

CD74HC670 Datasheet(PDF) 8 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

CD74HC670 Datasheet(HTML) 8 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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