HEF4522BF データシートの表示（PDF） - Philips Electronics
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HEF4522BF Datasheet PDF : 10 Pages
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Philips Semiconductors
Programmable 4-bit BCD down counter
Product specification
HEF4522B
MSI
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Minimum clock
pulse width; CP0
LOW
Minimum clock
pulse width; CP1
HIGH
Minimum PL
pulse width; HIGH
Minimum MR
pulse width; HIGH
Hold time
Pn → PL
Set-up time
Pn → PL
Maximum clock
pulse frequency
PL = LOW
5
10
tWCPL
15
5
10
tWCPH
15
5
10
tWPLH
15
5
10
tWMRH
15
5
10
thold
15
5
10
tsu
15
5
10
fmax
15
80 40
40 20
30 15
80 40
40 20
30 15
100 50
40 20
32 16
130 65
50 25
40 20
30
5
20
5
15
5
30
0
20
0
15
0
6 12
12 25
16 32
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
see also waveforms
Figs 5 and 6
see note 1
Note
1. In the divide-by-n mode (PL connected to TC), one has to observe the maximum HIGH to LOW propagation delay
for CP to TC, before applying the next clock pulse.
January 1995
7
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