HEF4515B 查看數據表（PDF） - Philips Electronics
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HEF4515B Datasheet PDF : 6 Pages
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Philips Semiconductors
1-of-16 decoder/demultiplexer with input latches
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Output transition
times
HIGH to LOW
LOW to HIGH
Set-up time
An → EL
Hold time
An → EL
Minimum EL pulse
width; HIGH
5
10
tTHL
15
5
10
tTLH
15
5
10 tsu
15
5
10
thold
15
5
10
tWELH
15
90
35
25
85
35
25
120 60
40 20
30 15
0 60
0 20
0 15
120 60
40 20
30 15
180 ns
65 ns
50 ns
170 ns
70 ns
50 ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Product specification
HEF4515B
MSI
TYPICAL EXTRAPOLATION
FORMULA
40 ns + (1,0 ns/pF) CL
14 ns + (0,42 ns/pF) CL
11 ns + (0,28 ns/pF) CL
35 ns + (1,0 ns/pf) CL
14 ns + (0,42 ns/pF) CL
11 ns + (0,28 ns/pF) CL
see also waveforms
Fig.5
Dynamic power
dissipation per
package (P)
VDD
V
TYPICAL FORMULA FOR P (µW)
5
1100 fi + ∑ (foCL) × VDD2
where
10
5500 fi + ∑ (foCL) × VDD2
fi = input freq. (MHz)
15
16 000 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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