HEF4532 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
HEF4532 Datasheet PDF : 8 Pages
| |||
Philips Semiconductors
8-input priority encoder
Product specification
HEF4532B
MSI
TRUTH TABLE
INPUTS
OUTPUTS
Ein
I7
I6
I5
I4
I3
I2
I1
I0
GS O2
O1
O0
Eout
L
X
X
X
X
X
X
X
X
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
X
X
X
X
X
X
X
H
H
H
H
L
H
L
H
X
X
X
X
X
X
H
H
H
L
L
H
L
L
H
X
X
X
X
X
H
H
L
H
L
H
L
L
L
H
X
X
X
X
H
H
L
L
L
H
L
L
L
L
H
X
X
X
H
L
H
H
L
H
L
L
L
L
L
H
X
X
H
L
H
L
L
H
L
L
L
L
L
L
H
X
H
L
L
H
L
H
L
L
L
L
L
L
L
H
H
L
L
L
L
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
LOGIC EQUATIONS
O2 = Ein ⋅ (I4 + I5 + I6 + I7)
O1 = Ein ⋅ (I2 ⋅ I4 ⋅ I5 + I3 ⋅ I4 ⋅ I5 + I6 + I7)
O0 = Ein ⋅ (I1 ⋅ I2 ⋅ I4 ⋅ I6 + I3 ⋅ I4 ⋅ I6 + I5 ⋅ I6 + I7)
Eout = Ein ⋅ I0 ⋅ I1 ⋅ I2 ⋅ I3 ⋅ I4 ⋅ I5 ⋅ I6 ⋅ I7
GS = Ein ⋅ (I0 + I1 + I2 + I3 + I4 + I5 + I6 + I7)
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns
Dynamic power
dissipation per
package (P)
VDD
V
TYPICAL FORMULA FOR P (µW)
5
1 620 fi + ∑ (foCL) × VDD2
10
6 600 fi + ∑ (foCL) × VDD2
15
15 970 fi + ∑ (foCL) × VDD2
where
fi = input freq. (MHz)
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
4
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