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HD74LS669FPEL Datasheet(PDF) 4 Page - Renesas Technology Corp

Part # HD74LS669FPEL
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

HD74LS669FPEL Datasheet(HTML) 4 Page - Renesas Technology Corp

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HD74LS669
Rev.2.00, Feb.18.2005, page 4 of 8
Switching Characteristics
(VCC = 5 V, Ta = 25°C)
Item
Symbol
Inputs
Outputs
min.
typ.
max.
Unit
Condition
Maximum clock frequency
ƒmax
25
32
—
MHz
tPLH
—
26
40
tPHL
Clock
Ripple
Carry
—
40
60
ns
tPLH
—
18
27
tPHL
Clock
QA to QD
—
18
27
ns
tPLH
—
11
17
tPHL
Enable
T
Ripple
Carry
—
29
45
ns
tPLH
—
22
35
Propagation delay time
tPHL
Up/Down
Ripple
Carry
—
26
40
ns
CL = 15 pF,
RL = 2 k
Ω
Count Sequence
13
14
15
0
Load
Ripple
Carry
Output
Inhibit
Count Down
Count Up
1
2
2
2
1
0
15
14
13
Load
Clock
U/
D
Data
Inputs
P and T
B
A
C
D
QC
QD
QA
QB



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