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HD74LS669 Datasheet(PDF) 7 Page - Renesas Technology Corp

Part # HD74LS669
Description  Synchronous Up / Down 4-bit Binary Counter
PDF  9 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD74LS669 Datasheet(HTML) 7 Page - Renesas Technology Corp

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HD74LS669
Rev.2.00, Feb.18.2005, page 7 of 8
Waveforms 2
(Measure at tn + 16)
(Measure at
tn + 16)
(Measure at
tn + 1)
(Measure at tn + 8)
(Measure at tn + 4)
(Measure at tn + 2)
Ripple
Carry
Output
Clock
1.3V 1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
1.3V
QA
QB
QC
QD
tTLH
tPLH
(Measure before
1 clock of tn + 16)
tPLH
tPLH (Measure at tn + 2)
tPLH (Measure at tn + 4)
tPLH (Measure at tn + 8)
tPHL
tPHL
tPHL
tPHL
tPHL
tw (CK)
tTHL
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
0V
3V
10%
10%
90%
Notes:
1.
Input pulse; tTLH
≤ 15 ns, t
THL
≤ 6 ns, PRR = 1 MHz, duty cycle 50%.
2.
For
ƒ
max tTLH = tTHL
≤ 2.5 ns.
3.
tn is the bit-time when all outputs are low.



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