HEF4022B 데이터 시트보기 (PDF) - Philips Electronics
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HEF4022B Datasheet PDF : 8 Pages
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Philips Semiconductors
4-stage divide-by-8 Johnson counter
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN.
TYP.
Hold times
5
140
70
CP0 → CP1
10
thold
15
50
25
30
15
5
170
85
CP1 → CP0
10
thold
15
60
30
40
20
Minimum clock
5
75
35
pulse width
10
tWCP
15
30
15
20
10
Minimum MR
5
70
35
pulse width; HIGH
10
tWMRH
15
30
15
20
10
Recovery time
5
30
10
for MR
10
tRMR
15
15
5
10
5
Maximum clock
5
3
6
pulse frequency
10
fmax
15
8
16
12
24
MAX.
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
Product specification
HEF4022B
MSI
see also waveforms
Figs 4 and 5
Dynamic power
dissipation per
package (P)
VDD
V
TYPICAL FORMULA FOR P (µW)
5
475 fi + ∑ (fo CL) × VDD 2
where
10
2400 fi + ∑ (fo CL) × VDD 2
fi = input freq. (MHz)
15
6700 fi + ∑ (fo CL) × VDD 2
fo = output freq. (MHz)
CL = total load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
5
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