HEF4555BN 查看數據表（PDF） - Philips Electronics
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HEF4555BN Datasheet PDF : 4 Pages
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Philips Semiconductors
Dual 1-of-4 decoder/demultiplexer
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Propagation delays
An → On
HIGH to LOW
LOW to HIGH
En → 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
tPHL
15
5
10
tPLH
15
5
10
tTHL
15
5
10
tTLH
15
115 230 ns
45 90 ns
30 65 ns
140 280 ns
55 105 ns
40 75 ns
125 250 ns
50 95 ns
30 65 ns
150 295 ns
55 110 ns
40 75 ns
60 120 ns
30 60 ns
20 40 ns
60 120 ns
30 60 ns
20 40 ns
Product specification
HEF4555B
MSI
TYPICAL EXTRAPOLATION
FORMULA
88 ns + (0,55 ns/pF) CL
34 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
113 ns + (0,55 ns/pF) CL
44 ns + (0,23 ns/pF) CL
32 ns + (0,16 ns/pF) CL
98 ns + (0,55 ns/pF) CL
39 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
123 ns + (0,55 ns/pF) CL
44 ns + (0,23 ns/pF) CL
32 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
4500 fi + ∑ (foCL) × VDD2
where
10
18 800 fi + ∑ (foCL) × VDD2
fi = input freq. (MHz)
15
45 700 fi + ∑ (foCL) × VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
APPLICATION INFORMATION
Some examples of applications for the HEF4555B are:
• Code conversion.
• Address decoding.
• Demultiplexing: when using the enable input as data input.
January 1995
4
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