HEF4021BPN Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Fabricante
HEF4021BPN Datasheet PDF : 6 Pages
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Philips Semiconductors
8-bit static shift register
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP.
Set-up time
DS → CP
Pn → PL
Hold times
DS → CP
Pn → PL
Minimum clock
pulse width; LOW
Minimum PL
pulse width; HIGH
Recovery time
for PL
Maximum clock
pulse frequency
5
10
tsu
15
5
10
tsu
15
5
10
thold
15
5
10
thold
15
5
10
tWCPL
15
5
10
tWPLH
15
5
10
tRPL
15
5
10
fmax
15
25
−15
25
−10
15
−5
50
25
30
10
20
5
40
20
20
10
15
8
15
−10
15
0
15
0
70
35
30
15
24
12
70
35
30
15
24
12
50
10
40
5
35
5
6
13
15
30
20
40
MAX.
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
Product specification
HEF4021B
MSI
see also waveforms
Figs 4 and 5
Dynamic power
dissipation per
package (P)
VDD
V
TYPICAL FORMULA FOR P (µW)
5
900 fi + ∑ (foCL) × VDD2
where
10
4 300 fi + ∑ (foCL) × VDD2
fi = input freq. (MHz)
15
12 000 fi + ∑ (foCL) × VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
5
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