HEF4028BT 데이터 시트보기 (PDF) - Philips Electronics
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HEF4028BT Datasheet PDF : 5 Pages
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Philips Semiconductors
1-of-10 decoder
Product specification
HEF4028B
MSI
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL TYP. MAX.
Propagation delays
An → On
HIGH to LOW
LOW to HIGH
Output transition times
HIGH to LOW
LOW to HIGH
5
10
tPHL
15
5
10
tPLH
15
5
10
tTHL
15
5
10
tTLH
15
100
200
ns
40
80
ns
30
60
ns
90
180
ns
40
80
ns
30
60
ns
60
120
ns
30
60
ns
20
40
ns
60
120
ns
30
60
ns
20
40
ns
TYPICAL EXTRAPOLATION
FORMULA
73 ns + (0,55 ns/pF) CL
29 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
63 ns + (0,55 ns/pF) CL
29 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
10 ns + (1,0 ns/pF) CL
9 ns + (0,42 ns/pF) CL
6 ns + (0,28 ns/pF) CL
10 ns + (1,0 ns/pF) CL
9 ns + (0,42 ns/pF) CL
6 ns + (0,28 ns/pF) CL
Dynamic power
dissipation per
package (P)
VDD
V
TYPICAL FORMULA FOR P (µW)
5
350 fi + ∑ (foCL) × VDD 2
where
10
2 200 fi + ∑ (foCL) × VDD 2
fi = input freq. (MHz)
15
7 350 fi + ∑ (foCL) × VDD 2
fo = output freq. (MHz)
CL = total load cap. (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
5
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