PHILIPS HEF4532BF 8-input priority encoder Datasheet

INTEGRATED CIRCUITS
DATA SHEET
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
HEF4532B
MSI
8-input priority encoder
Product specification
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
corresponding to the highest priority input (I0 to I7) which is
HIGH, is generated on O0 to O2 if Ein is HIGH. Input I7 is
assigned the highest priority.
GS is HIGH when one or more priority inputs and Ein are
HIGH. Eout is HIGH when I0 to I7 are LOW and Ein is HIGH.
Ein, when LOW, forces all outputs (O0 to O2, GS, Eout)
LOW.
DESCRIPTION
The HEF4532B is an 8-input priority encoder with eight
active HIGH priority inputs (I0 to I7), three active HIGH
outputs (O0 to O2), an active HIGH enable input (Ein), an
active HIGH enable output (Eout) and an active HIGH
group select output (GS).
Data is accepted on inputs I0 to I7. The binary code
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
Fig.1 Functional diagram.
PINNING
I0 to I7
priority inputs
Ein
enable input
Eout
enable output
GS
group select output
O0 to O2
outputs
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
Fig.2 Pinning diagram.
January 1995
2
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Philips Semiconductors
8-input priority encoder
January 1995
3
Product specification
HEF4532B
MSI
Fig.3 Logic diagram.
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
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
VDD
V
Dynamic power
5
TYPICAL FORMULA FOR P (µW)
1 620 fi + ∑ (foCL) × VDD2
where
fi = input freq. (MHz)
dissipation per
10
6 600 fi + ∑ (foCL) ×
package (P)
15
15 970 fi + ∑ (foCL) ×
VDD2
VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
4
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns; see also waveforms Fig.4
VDD
V
TYPICAL EXTRAPOLATION
FORMULA
SYMBOL MIN. TYP. MAX.
Propagation delays
Ein → Eout
HIGH to LOW
5
10
tPHL
15
5
LOW to HIGH
10
tPLH
15
Ein → GS
HIGH to LOW
5
10
tPHL
15
5
LOW to HIGH
10
tPLH
15
Ein → On
HIGH to LOW
LOW to HIGH
In → On
HIGH to LOW
LOW to HIGH
In → GS
HIGH to LOW
LOW to HIGH
Output transition
times
HIGH to LOW
LOW to HIGH
190
ns
68 ns + (0,55 ns/pF) CL
90
ns
34 ns + (0,23 ns/pF) CL
35
70
ns
27 ns + (0,16 ns/pF) CL
80
160
ns
53 ns + (0,55 ns/pF) CL
35
70
ns
24 ns + (0,23 ns/pF) CL
30
60
ns
22 ns + (0,16 ns/pF) CL
85
170
ns
58 ns + (0,55 ns/pF) CL
45
90
ns
34 ns + (0,23 ns/pF) CL
35
70
ns
27 ns + (0,16 ns/pF) CL
80
160
ns
53 ns + (0,55 ns/pF) CL
40
80
ns
29 ns + (0,23 ns/pF) CL
30
60
ns
22 ns + (0,16 ns/pF) CL
80
160
ns
53 ns + (0,55 ns/pF) CL
40
80
ns
29 ns + (0,23 ns/pF) CL
15
30
60
ns
22 ns + (0,16 ns/pF) CL
5
85
170
ns
58 ns + (0,55 ns/pF) CL
5
10
tPHL
40
80
ns
29 ns + (0,23 ns/pF) CL
15
30
60
ns
22 ns + (0,16 ns/pF) CL
5
115
230
ns
88 ns + (0,55 ns/pF) CL
10
tPLH
50
100
ns
39 ns + (0,23 ns/pF) CL
15
35
70
ns
27 ns + (0,16 ns/pF) CL
5
115
230
ns
88 ns + (0,55 ns/pF) CL
10
tPHL
50
100
ns
39 ns + (0,23 ns/pF) CL
15
35
70
ns
27 ns + (0,16 ns/pF) CL
5
115
230
ns
88 ns + (0,55 ns/pF) CL
10
tPLH
50
100
ns
39 ns + (0,23 ns/pF) CL
15
40
80
ns
32 ns + (0,16 ns/pF) CL
5
115
230
ns
88 ns + (0,55 ns/pF) CL
10
tPHL
50
100
ns
39 ns + (0,23 ns/pF) CL
15
40
80
ns
32 ns + (0,16 ns/pF) CL
5
60
120
ns
10 ns + (1,0 ns/pF) CL
30
60
ns
10
10
tPLH
tTHL
9 ns + (0,42 ns/pF) CL
6 ns + (0,28 ns/pF) CL
15
20
40
ns
5
60
120
ns
30
60
ns
9 ns + (0,42 ns/pF) CL
20
40
ns
6 ns + (0,28 ns/pF) CL
10
15
January 1995
95
45
tTLH
5
10 ns + (1,0 ns/pF) CL
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
Fig.4 Waveforms showing propagation delays from inputs to outputs.
January 1995
6
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
APPLICATION INFORMATION
Some examples of applications for the HEF4532B are:
• Priority encoder
• Keyboard encoder
Fig.5 16-level priority encoder.
January 1995
7
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
Fig.6 0-to-9 keyboard encoder.
TRUTH TABLE (for Fig.6)
INPUTS
9
OUTPUTS
8
7
6
5
4
3
2
1
0
GS
O’3
O’2
O’1
O’0
H
X
X
X
X
X
X
X
X
X
L
H
L
L
H
L
H
X
X
X
X
X
X
X
X
L
H
L
L
L
L
L
H
X
X
X
X
X
X
X
H
L
H
H
H
L
L
L
H
X
X
X
X
X
X
H
L
H
H
L
L
L
L
L
H
X
X
X
X
X
H
L
H
L
H
L
L
L
L
L
H
X
X
X
X
H
L
H
L
L
L
L
L
L
L
L
H
X
X
X
H
L
L
H
H
L
L
L
L
L
L
L
H
X
X
H
L
L
H
L
L
L
L
L
L
L
L
L
H
X
H
L
L
L
H
L
L
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
January 1995
8
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