DATA SHEET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF4532B
MSI
8-input priority encoder
For a complete data sheet, please also download:
The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
January 1995
2
Philips Semiconductors
Product specification
8-input priority encoder
HEF4532B
MSI
DESCRIPTION
The HEF4532B is an 8-input priority encoder with eight
active HIGH priority inputs (I
0
to I
7
), three active HIGH
outputs (O
0
to O
2
), an active HIGH enable input (E
in
), an
active HIGH enable output (E
out
) and an active HIGH
group select output (GS).
Data is accepted on inputs I
0
to I
7
. The binary code
corresponding to the highest priority input (I
0
to I
7
) which is
HIGH, is generated on O
0
to O
2
if E
in
is HIGH. Input I
7
is
assigned the highest priority.
GS is HIGH when one or more priority inputs and E
in
are
HIGH. E
out
is HIGH when I
0
to I
7
are LOW and E
in
is HIGH.
E
in
, when LOW, forces all outputs (O
0
to O
2
, GS, E
out
)
LOW.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
PINNING
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
HEF4532BP(N):
16-lead DIL; plastic
(SOT38-1)
HEF4532BD(F):
16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4532BT(D):
16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
I
0
to I
7
priority inputs
E
in
enable input
E
out
enable output
GS
group select output
O
0
to O
2
outputs
January 1995
3
Philips Semiconductors
Product specification
8-input priority encoder
HEF4532B
MSI
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Fig.3 Logic diagram.
January 1995
4
Philips Semiconductors
Product specification
8-input priority encoder
HEF4532B
MSI
TRUTH TABLE
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
LOGIC EQUATIONS
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
C; input transition times
20 ns
INPUTS
OUTPUTS
E
in
I
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
GS
O
2
O
1
O
0
E
out
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
O
2
= E
in
(I
4
+
I
5
+
I
6
+
I
7
)
O
1
= E
in
(I
2
I
4
I
5
+
I
3
I
4
I
5
+
I
6
+
I
7
)
O
0
= E
in
(I
1
I
2
I
4
I
6
+
I
3
I
4
I
6
+
I
5
I
6
+
I
7
)
E
out
= E
in
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
GS
= E
in
(I
0
+
I
1
+
I
2
+
I
3
+
I
4
+
I
5
+
I
6
+
I
7
)
V
DD
V
TYPICAL FORMULA FOR P (
W)
Dynamic power
5
1 620 f
i
+
(f
o
C
L
)
V
DD
2
where
dissipation per
10
6 600 f
i
+
(f
o
C
L
)
V
DD
2
f
i
= input freq. (MHz)
package (P)
15
15 970 f
i
+
(f
o
C
L
)
V
DD
2
f
o
= output freq. (MHz)
C
L
= load capacitance (pF)
(f
o
C
L
) = sum of outputs
V
DD
= supply voltage (V)
January 1995
5
Philips Semiconductors
Product specification
8-input priority encoder
HEF4532B
MSI
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
C; C
L
= 50 pF; input transition times
20 ns; see also waveforms Fig.4
V
DD
V
SYMBOL MIN.
TYP.
MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
E
in
E
out
5
95
190
ns
68 ns
+
(0,55 ns/pF) C
L
HIGH to LOW
10
t
PHL
45
90
ns
34 ns
+
(0,23 ns/pF) C
L
15
35
70
ns
27 ns
+
(0,16 ns/pF) C
L
5
80
160
ns
53 ns
+
(0,55 ns/pF) C
L
LOW to HIGH
10
t
PLH
35
70
ns
24 ns
+
(0,23 ns/pF) C
L
15
30
60
ns
22 ns
+
(0,16 ns/pF) C
L
E
in
GS
5
85
170
ns
58 ns
+
(0,55 ns/pF) C
L
HIGH to LOW
10
t
PHL
45
90
ns
34 ns
+
(0,23 ns/pF) C
L
15
35
70
ns
27 ns
+
(0,16 ns/pF) C
L
5
80
160
ns
53 ns
+
(0,55 ns/pF) C
L
LOW to HIGH
10
t
PLH
40
80
ns
29 ns
+
(0,23 ns/pF) C
L
15
30
60
ns
22 ns
+
(0,16 ns/pF) C
L
E
in
O
n
5
80
160
ns
53 ns
+
(0,55 ns/pF) C
L
HIGH to LOW
10
t
PHL
40
80
ns
29 ns
+
(0,23 ns/pF) C
L
15
30
60
ns
22 ns
+
(0,16 ns/pF) C
L
5
85
170
ns
58 ns
+
(0,55 ns/pF) C
L
LOW to HIGH
10
t
PLH
40
80
ns
29 ns
+
(0,23 ns/pF) C
L
15
30
60
ns
22 ns
+
(0,16 ns/pF) C
L
I
n
O
n
5
115
230
ns
88 ns
+
(0,55 ns/pF) C
L
HIGH to LOW
10
t
PHL
50
100
ns
39 ns
+
(0,23 ns/pF) C
L
15
35
70
ns
27 ns
+
(0,16 ns/pF) C
L
5
115
230
ns
88 ns
+
(0,55 ns/pF) C
L
LOW to HIGH
10
t
PLH
50
100
ns
39 ns
+
(0,23 ns/pF) C
L
15
35
70
ns
27 ns
+
(0,16 ns/pF) C
L
I
n
GS
5
115
230
ns
88 ns
+
(0,55 ns/pF) C
L
HIGH to LOW
10
t
PHL
50
100
ns
39 ns
+
(0,23 ns/pF) C
L
15
40
80
ns
32 ns
+
(0,16 ns/pF) C
L
5
115
230
ns
88 ns
+
(0,55 ns/pF) C
L
LOW to HIGH
10
t
PLH
50
100
ns
39 ns
+
(0,23 ns/pF) C
L
15
40
80
ns
32 ns
+
(0,16 ns/pF) C
L
Output transition
5
60
120
ns
10 ns
+
(1,0 ns/pF) C
L
times
10
t
THL
30
60
ns
9 ns
+
(0,42 ns/pF) C
L
HIGH to LOW
15
20
40
ns
6 ns
+
(0,28 ns/pF) C
L
5
60
120
ns
10 ns
+
(1,0 ns/pF) C
L
LOW to HIGH
10
t
TLH
30
60
ns
9 ns
+
(0,42 ns/pF) C
L
15
20
40
ns
6 ns
+
(0,28 ns/pF) C
L
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