U74AHC640L-R20-R datasheet(6/7 Pages) UTC

部件名	U74AHC640L-R20-R

功能描述	OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

PDF	7 Pages

Scroll/Zoom	100%

制造商	UTC [Unisonic Technologies]

网页	http://www.utc-ic.com

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6 / 7 page

U74HC640

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 7

www.unisonic.com.tw

QW-R126-008.A

TEST CIRCUIT AND WAVEFORMS(Cont.)

VIN

VOH

VOL

Voltage Waveforms Propagation Delay and Output Transition Times

Input

Output

tPLH

tPHL

tPLH

tPHL

VOH

VOL

Output

10%

90%

10%

90%

10%

90%

10%

90%

VIN

VOH

Input

Output

tPZH

tPHZ

tPLZ

tPZL

VLOAD

VOL

Output

S1 at GND

S1 at VLOAD

VOH-VΔ

VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES

VOL+VΔ

Notes: 1. CL includes probe and jig capacitance.

2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω,

tR=6ns, tF=6ns.

3. tPLH and tPHL are the same as tPD .

4. tPLZ and tPHZ are the same as tDIS .

5. tPZH and tPZL are the same as tEN .

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