HD74LS192P datasheet(7/11 Pages) RENESAS

部件名	HD74LS192P

功能描述	Synchronous Up / Down Decade Counter (dual clock lines)

PDF	11 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

标志

7 / 11 page

HD74LS192

Rev.2.00, Feb.18.2005, page 7 of 10

Waveforms 1

max, tPLH, tPHL, (Count Up)

(Measure at tn + 10)

(Measure at

tn + 10)

(Measure at

tn + 1)

(Measure at

tn + 8)

(Measure at

tn + 4)

(Measure before

1 clock of tn + 10)

(Measure at

tn + 2)

Carry

Outputs

Count

1.3V 1.3V

1.3V

tTLH

tPLH

tPHL

tPLH (Measure at tn + 2)

tPLH (Measure at tn + 4)

tPLH (Measure at tn + 8)

tPLH

tPHL

tw (L)

tw (H)

tTHL

VOH

VOL

VOH

VOL

VOH

VOL

VOH

VOL

VOH

VOL

10%

90%

Notes:

Input pulse; tTLH, tTHL

≤ 7 ns, PRR = 500 kHz (Data input). PRR = 1 MHz (except data input)

Duty cycle = 50%

for

max tTLH, tTHL

≤ 2.5 ns.

tn is reference bit time when all outputs are low.

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